Nothing Special   »   [go: up one dir, main page]

CN115078222B - An imbibition physical simulation experimental device and method considering seam end pressure difference - Google Patents

An imbibition physical simulation experimental device and method considering seam end pressure difference Download PDF

Info

Publication number
CN115078222B
CN115078222B CN202210793484.4A CN202210793484A CN115078222B CN 115078222 B CN115078222 B CN 115078222B CN 202210793484 A CN202210793484 A CN 202210793484A CN 115078222 B CN115078222 B CN 115078222B
Authority
CN
China
Prior art keywords
liquid
rock plate
cylinder
inner cylinder
simulation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202210793484.4A
Other languages
Chinese (zh)
Other versions
CN115078222A (en
Inventor
黄海
何延龙
王寅秋
安狮子
张强
白云飞
王鑫
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xian Shiyou University
Original Assignee
Xian Shiyou University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Xian Shiyou University filed Critical Xian Shiyou University
Priority to CN202210793484.4A priority Critical patent/CN115078222B/en
Publication of CN115078222A publication Critical patent/CN115078222A/en
Application granted granted Critical
Publication of CN115078222B publication Critical patent/CN115078222B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
    • G01N15/08Investigating permeability, pore-volume, or surface area of porous materials
    • G01N15/082Investigating permeability by forcing a fluid through a sample
    • G01N15/0826Investigating permeability by forcing a fluid through a sample and measuring fluid flow rate, i.e. permeation rate or pressure change
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N13/00Investigating surface or boundary effects, e.g. wetting power; Investigating diffusion effects; Analysing materials by determining surface, boundary, or diffusion effects
    • G01N13/04Investigating osmotic effects

Landscapes

  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Dispersion Chemistry (AREA)
  • Fluid Mechanics (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)

Abstract

本发明属于实验设备技术领域,涉及一种考虑缝端压差的渗吸物理模拟实验装置,包括:模拟筒、三个进液口、三个排液口、左内筒、围压套、右内筒、加压组件、第一进液管、第二进液管、第三进液管;三个排液管,设置在模拟筒外部,分别与三个排液口相连接;检测组件,设置在三个排液管上,用于检测三个排液管内部的液体压力变化。本发明通过模拟筒、左内筒、围压套、右内筒与加压组件的配合设置,能够对岩板样品的两端进行施压且两端能够处于不同的压力状态下,使岩板样品在左右两侧液体施加的不同压力下发生渗吸交换,模拟实际情况下岩板处于裂缝与基质之间存在压差条件下的渗吸采油过程,保证了实验的精度,使其更加接近实际采油过程。

The invention belongs to the technical field of experimental equipment and relates to an imbibition physical simulation experimental device that considers seam end pressure difference, including: a simulation cylinder, three liquid inlets, three liquid discharge ports, a left inner cylinder, a confining pressure sleeve, a right The inner cylinder, the pressurizing component, the first liquid inlet pipe, the second liquid inlet pipe, and the third liquid inlet pipe; three liquid discharge pipes are arranged outside the simulation cylinder and connected to the three liquid discharge ports respectively; the detection component, Set on three drain pipes, it is used to detect changes in liquid pressure inside the three drain pipes. Through the cooperative arrangement of the simulation cylinder, the left inner cylinder, the confining pressure sleeve, the right inner cylinder and the pressurizing assembly, the present invention can pressurize both ends of the rock plate sample and the two ends can be in different pressure states, making the rock plate The sample undergoes imbibition exchange under different pressures exerted by the liquid on the left and right sides, simulating the actual imbibition oil recovery process when the rock plate is in a pressure difference between the crack and the matrix, ensuring the accuracy of the experiment and making it closer to reality. Oil recovery process.

Description

一种考虑缝端压差的渗吸物理模拟实验装置及方法An imbibition physical simulation experimental device and method considering seam end pressure difference

技术领域Technical field

本发明属于实验设备技术领域,涉及一种考虑缝端压差的渗吸物理模拟实验装置及方法。The invention belongs to the technical field of experimental equipment, and relates to an imbibition physical simulation experimental device and method that considers seam end pressure difference.

背景技术Background technique

随着世界范围内常规石油资源的深入开发,以致密/页岩油为重要组成的非常规油气资源的高效开发与利用逐渐成为研究的热点与难点。加快致密/页岩油的勘探、开发对于我国陆相非常规油气资源的突破具有示范作用。与常规油藏相比,致密/页岩油藏基质覆压渗透率普遍小于0.1×10-3μm2,现阶段水平井大型体积压裂技术是其工业开发的基本手段,与常规油藏基质内压差驱替采油不同,该类储层经大规模体积压裂改造后,在基质-高渗裂缝双重介质系统下注入水主要沿裂缝流动,基质内难以形成有效驱替,裂缝-基质系统间的毛管渗吸作用是该类油藏基质内原油动用的主要机理。With the in-depth development of conventional oil resources around the world, the efficient development and utilization of unconventional oil and gas resources, with tight/shale oil as an important component, has gradually become a hot and difficult topic in research. Accelerating the exploration and development of tight/shale oil has a demonstration effect on the breakthrough of my country's continental unconventional oil and gas resources. Compared with conventional oil reservoirs, the matrix overburden permeability of tight/shale oil reservoirs is generally less than 0.1×10 -3 μm 2 . At this stage, large-scale volume fracturing technology for horizontal wells is the basic means of industrial development. Unlike conventional oil reservoir matrices, Internal pressure difference displacement oil recovery is different. After this type of reservoir has been transformed by large-scale volume fracturing, the injected water mainly flows along the fractures under the matrix-high permeability fracture dual media system, and it is difficult to form effective displacement in the matrix. The fracture-matrix system The capillary imbibition between the reservoirs is the main mechanism of crude oil movement in the matrix of this type of oil reservoir.

目前,致密/页岩岩心渗吸置换规律的实验研究主要集中于常压下渗吸置换(即自发渗吸),并未考虑外部流体压力影响下的渗吸置换(即带压渗吸)。对于致密/页岩岩心带压渗吸规律实验研究,存在以下几个问题:第一,常规岩心尺度的渗吸置换量少,且物理模拟实验在加压条件下进行,常规的体积法和质量法难以实现精确计量;第二,致密/页岩岩心在覆压条件下存在明显的应力敏感特征,孔隙结构的变化是否会影响渗吸置换作用。其中一种高温高压岩心渗吸实验装置及方法(申请号201810598183.X)通过将岩心放置在密闭容器中施压,模拟岩心周围整体压力变化时的渗吸现象;而压裂后大量压裂液在裂缝表面施加的压力与基质岩心所具有的压力存在明显的压力差,上述装置无法模拟高压下,裂缝岩心端面与岩心基质存在压差时的渗吸现象。At present, experimental research on the imbibition displacement rules of tight/shale cores mainly focuses on imbibition displacement under normal pressure (i.e., spontaneous imbibition), and does not consider imbibition displacement under the influence of external fluid pressure (i.e., pressure imbibition). For the experimental study of pressure imbibition rules in tight/shale cores, there are several problems: First, the amount of imbibition replacement in conventional core scales is small, and physical simulation experiments are conducted under pressurized conditions. Conventional volume and mass methods It is difficult to achieve accurate measurement using this method; secondly, tight/shale cores have obvious stress-sensitive characteristics under overburden pressure, and whether changes in pore structure will affect imbibition displacement. One of the high-temperature and high-pressure core imbibition experimental devices and methods (Application No. 201810598183. There is a significant pressure difference between the pressure exerted on the fracture surface and the pressure in the matrix core. The above device cannot simulate the imbibition phenomenon when there is a pressure difference between the end face of the fracture core and the core matrix under high pressure.

发明内容Contents of the invention

本发明目的在于提供一种考虑缝端压差的渗吸物理模拟实验装置及方法,以解决实验装置无法模拟高压下,裂缝岩心端面与岩心基质存在压差时渗吸现象的技术问题。The purpose of the present invention is to provide an imbibition physical simulation experimental device and method that considers the pressure difference at the fracture end to solve the technical problem that the experimental device cannot simulate the imbibition phenomenon when there is a pressure difference between the fracture core end face and the core matrix under high pressure.

为实现上述目的,本发明一种考虑缝端压差的渗吸物理模拟实验装置及方法的具体技术方案如下:In order to achieve the above purpose, the specific technical solution of the present invention is as follows: an imbibition physical simulation experimental device and method that considers the seam end pressure difference:

一种考虑缝端压差的渗吸物理模拟实验装置,包括:An imbibition physical simulation experimental device that considers seam end pressure difference, including:

模拟筒,筒身相对的两侧分别开设有三个进液口与三个排液口;Simulation cylinder has three liquid inlets and three liquid discharge ports on opposite sides of the cylinder;

左内筒、围压套与右内筒,从左到右依次设置在模拟筒内部且分别与三个进液口、三个排液口的位置相对,左内筒与右内筒通过围压套连接,左内筒、右内筒分别与模拟筒内壁相接触,左内筒内部、右内筒内部分别与对应的进液口、排液口相连通,围压套与模拟筒内壁留有间隔,围压套内部用于放置岩板样品;The left inner cylinder, the confining pressure sleeve and the right inner cylinder are arranged inside the simulation cylinder in sequence from left to right and are opposite to the three liquid inlets and three liquid discharge ports respectively. The left inner cylinder and the right inner cylinder pass through the confining pressure The left inner cylinder and the right inner cylinder are respectively in contact with the inner wall of the simulation cylinder. The inside of the left inner cylinder and the right inner cylinder are connected with the corresponding liquid inlet and drain port respectively. There is a gap between the confining pressure sleeve and the inner wall of the simulation cylinder. Interval, the inside of the confining sleeve is used to place rock slab samples;

加压组件,设置在模拟筒外部,通过第一进液管、第二进液管、第三进液管分别与三个进液口相连接,分别用于对左内筒内部、围压套、右内筒内部施加压力;The pressurizing component is arranged outside the simulation cylinder and is connected to the three liquid inlets through the first, second and third liquid inlet pipes, respectively, for pressurizing the inside of the left inner cylinder and the confining pressure sleeve. , apply pressure inside the right inner cylinder;

三个排液管,设置在模拟筒外部,分别与三个排液口相连接;Three drain pipes are arranged outside the simulation cylinder and connected to three drain ports respectively;

检测组件,设置在三个排液管上,用于检测三个排液管内部的液体压力变化。The detection component is arranged on the three drain pipes and is used to detect changes in liquid pressure inside the three drain pipes.

本发明的特点还在于:The invention is also characterized by:

其中加压组件包括第一平流泵、第二平流泵与第三平流泵,第一平流泵通过第一进液管与靠近左内筒的进液口相连接,第二平流泵通过第二进液管与靠近围压套的进液口相连接,第三平流泵通过第三进液管与靠近右内筒的进液口相连接,第一平流泵上设置有第一活塞式中间容器,第三进液管上设置有第二活塞式中间容器,第一进液管、第二进液管、第三进液管上分别设置有第一阀门10。The pressurizing assembly includes a first advection pump, a second advection pump and a third advection pump. The first advection pump is connected to the liquid inlet near the left inner cylinder through a first liquid inlet pipe, and the second advection pump passes through a second advection pipe. The liquid inlet pipe is connected to the liquid inlet near the confining pressure sleeve, the third advection pump is connected to the liquid inlet near the right inner cylinder through the third liquid inlet pipe, and the first advection pump is provided with a first piston-type intermediate container, the third liquid inlet pipe is provided with a second piston-type intermediate container, and the first liquid inlet pipe, the second liquid inlet pipe, and the third liquid inlet pipe are respectively provided with first valves 10 .

其中还包括恒温箱,模拟筒、第一活塞式中间容器、第二活塞式中间容器、检测组件分别位于恒温箱内。It also includes a thermostat, in which the simulation cylinder, the first piston-type intermediate container, the second piston-type intermediate container, and the detection component are respectively located.

其中检测组件包括三个压力传感器,三个压力传感器分别设置在三个排液管上,每一个排液管远离模拟筒的端部设置有三通管,压力传感器设置在三通管的一个接口,三通管的另一个接口设置有第二阀门。The detection component includes three pressure sensors. The three pressure sensors are respectively installed on three drain pipes. Each drain pipe is equipped with a three-way pipe at the end far away from the simulation tube. The pressure sensor is installed on an interface of the three-way pipe. Another interface of the tee pipe is provided with a second valve.

其中恒温箱外部设置有嵌入式信息处理器,嵌入式信息处理器分别与三个压力传感器电连接,嵌入式信息处理器一侧设置有控制终端,控制终端与嵌入式信息处理器电连接。An embedded information processor is provided outside the thermostatic box, and the embedded information processor is electrically connected to three pressure sensors respectively. A control terminal is provided on one side of the embedded information processor, and the control terminal is electrically connected to the embedded information processor.

其中模拟筒的两端为开口结构,模拟筒的两端分别设置有视窗固定筒,每一个视窗固定筒与模拟筒内壁螺纹连接,每一个视窗固定筒内部设置有玻璃视窗,每一个视窗固定筒外部靠近玻璃视窗的位置设置有高清内窥镜,高清内窥镜与控制终端电连接。The two ends of the simulation tube are open structures, and the two ends of the simulation tube are respectively provided with window fixing tubes. Each window fixing tube is threadedly connected to the inner wall of the simulation tube. Each window fixing tube is provided with a glass window inside. Each window fixing tube A high-definition endoscope is provided outside near the glass window, and the high-definition endoscope is electrically connected to the control terminal.

其中右内筒内靠近围压套的位置设置有岩板固定筒,岩板固定筒与右内筒内壁螺纹连接。A rock plate fixed cylinder is provided in the right inner cylinder close to the confining pressure sleeve, and the rock plate fixed cylinder is threadedly connected to the inner wall of the right inner cylinder.

一种考虑缝端压差的渗吸物理模拟实验方法,包括以下步骤:An imbibition physical simulation experimental method considering the seam-end pressure difference, including the following steps:

步骤一,岩板样品准备:利用抽真空法测量岩板的孔隙度,测量岩板的厚度和直径,利用皂膜法测定岩板的渗透率,筛选出符合要求的岩板样品,然后分别将配置好的模拟渗吸液和模拟油注入第一活塞式中间容器和第二活塞式中间容器的活塞上部,将恒温箱的温度设定到模拟温度;Step 1. Preparation of rock plate samples: Use the vacuum method to measure the porosity of the rock plate, measure the thickness and diameter of the rock plate, use the soap film method to measure the permeability of the rock plate, screen out the rock plate samples that meet the requirements, and then separate them. The configured simulated imbibition liquid and simulated oil are injected into the upper parts of the piston of the first piston-type intermediate container and the second piston-type intermediate container, and the temperature of the thermostat is set to the simulated temperature;

步骤二,装填岩板样品:依次打开模拟筒右侧的视窗固定筒和岩板固定筒,将岩板样品放置在围压套中,并依次旋紧岩板固定筒和视窗固定筒,然后打开第二平流泵,将第二平流泵设定为实验设定的围压值,保持压力稳定,打开第二进液管上的第一阀门和第二进液管对应的排液管上的第二阀门,当第二排液通道的出口端出现煤油后,关闭第二进液管对应的排液管上的第二阀门,通过煤油的压力挤压围压套,使围压套与岩板样品紧密接触,将岩板样品除却两端的其他位置密封;Step 2: Load the rock plate sample: Open the window fixing tube and the rock plate fixing tube on the right side of the simulation tube in sequence, place the rock plate sample in the confining pressure sleeve, tighten the rock plate fixing tube and the window fixing tube in sequence, and then open For the second advection pump, set the second advection pump to the confining pressure value set by the experiment, keep the pressure stable, and open the first valve on the second liquid inlet pipe and the third valve on the discharge pipe corresponding to the second liquid inlet pipe. Second valve, when kerosene appears at the outlet end of the second drain channel, close the second valve on the drain pipe corresponding to the second liquid inlet pipe, and squeeze the confining sleeve through the pressure of kerosene, so that the confining sleeve is in contact with the rock plate The samples are in close contact, and the rock plate sample is sealed except for both ends;

步骤三,充注模拟液:依次打开第一进液管、第三进液管上的第一阀门以及第一进液管对应的排液管上的第二阀门、第三进液管对应的排液管上的第二阀门,同时打开第一平流泵、第三平流泵,开始向左内筒与右内筒分别充注模拟渗吸液和模拟油,当第一进液管6对应的排液管出现模拟渗吸液,第三进液管对应的排液管出口端出现模拟油后,关闭两个排液管上的第二阀门和第一平流泵、第三平流泵;Step 3: Fill the simulation fluid: Open the first valve on the first liquid inlet pipe and the third liquid inlet pipe in sequence, and the second valve on the discharge pipe corresponding to the first liquid inlet pipe, and the corresponding valve on the third liquid inlet pipe. The second valve on the discharge pipe opens the first advection pump and the third advection pump at the same time, and starts to fill the left inner cylinder and the right inner cylinder with simulated imbibition fluid and simulated oil respectively. When the first liquid inlet pipe 6 corresponds After simulated imbibition liquid appears in the drain pipe, and simulated oil appears at the outlet end of the drain pipe corresponding to the third liquid inlet pipe, close the second valve and the first advection pump and the third advection pump on the two drain pipes;

步骤四,高压渗吸模拟:打开第一平流泵、第三平流泵,并设定为对应的恒定压力值,保持左内筒与右内筒内具有不同的压力,岩板样品在左右两侧液体施加的不同压力下发生渗吸交换;Step 4, high-pressure imbibition simulation: turn on the first advection pump and the third advection pump, and set them to corresponding constant pressure values. Keep the left and right inner cylinders at different pressures. The rock plate samples are placed on the left and right sides. Osmotic exchange occurs under different pressures exerted by side fluids;

步骤五,数据动态采集:从充注模拟液开始,嵌入式信息处理器每分钟采集三个压力传感器上的压力值并将其反馈到控制终端,同时两个高清内窥镜实时采集两个玻璃视窗内的岩板样品变化的视频信息并将其反馈到控制终端;Step 5: Dynamic data collection: Starting from filling the simulation fluid, the embedded information processor collects the pressure values on the three pressure sensors every minute and feeds them back to the control terminal. At the same time, the two high-definition endoscopes collect two glasses in real time. The video information of changes in the rock plate sample in the window is fed back to the control terminal;

步骤六,模拟结束:当左内筒与右内筒内的压力差稳定后,即可停止模拟实验,关闭实验装置,排除模拟液,取出岩板用保鲜膜包裹,清洗实验装置。Step 6: End of simulation: When the pressure difference between the left inner cylinder and the right inner cylinder is stable, the simulation experiment can be stopped, the experimental device is closed, the simulation liquid is removed, the rock plate is taken out and wrapped in plastic wrap, and the experimental device is cleaned.

其中步骤一中模拟油为3#白油、5#白油、7#白油和10#白油中的一种,步骤一中模拟渗吸液由重水、氟化液、水中的一种配制。The simulated oil in step 1 is one of 3# white oil, 5# white oil, 7# white oil and 10# white oil. The simulated imbibition liquid in step 1 is prepared from one of heavy water, fluorinated liquid and water. .

其中还包括步骤七,岩板样品分析:将实验前的干燥的岩板样品、饱和模拟油的岩板样品以及模拟渗吸实验后的岩板样品进行核磁共振监测,对三个时间段的岩板样品中的氢信号量进行检测,并分析三个时间段的岩板样品中的氢信号量变化,确定岩板样品在不同温度压力条件下渗吸量。It also includes step seven, rock plate sample analysis: conduct nuclear magnetic resonance monitoring on the dry rock plate samples before the experiment, the rock plate samples saturated with simulated oil, and the rock plate samples after the simulated imbibition experiment, and analyze the rock plate samples in three time periods. The hydrogen signal amount in the rock plate samples was detected, and the changes in the hydrogen signal amount in the rock plate samples in three time periods were analyzed to determine the amount of imbibition of the rock plate samples under different temperature and pressure conditions.

本发明的一种考虑缝端压差的渗吸物理模拟实验装置及方法具有以下优点:The imbibition physical simulation experimental device and method of the present invention that considers the seam end pressure difference have the following advantages:

第一,通过模拟筒、左内筒、围压套、右内筒与加压组件的配合设置,能够对岩板样品的两端进行施压且两端能够处于不同的压力状态下,使岩板样品在左右两侧液体施加的不同压力下发生渗吸交换,模拟实际情况下岩板处于裂缝与基质之间存在压差条件下的渗吸采油过程,保证了实验的精度,使其更加接近实际采油过程;First, through the combination of the simulation cylinder, the left inner cylinder, the confining pressure sleeve, the right inner cylinder and the pressurizing assembly, both ends of the rock plate sample can be pressurized and the two ends can be in different pressure states, making the rock The plate sample undergoes imbibition exchange under different pressures exerted by the liquid on the left and right sides, simulating the actual imbibition oil recovery process when the rock plate is in a pressure difference between the crack and the matrix, ensuring the accuracy of the experiment and making it closer Actual oil production process;

第二,通过围压套的设置,使围压套在受力的作用下能够与岩板样品紧密接触,从而使岩板样品除却两端的其他位置密封,确保了实验的正常进行,保证的实验的精度;Second, through the setting of the confining sleeve, the confining sleeve can be in close contact with the rock plate sample under the action of force, thereby sealing the rock plate sample except at both ends, ensuring the normal conduct of the experiment and ensuring the accuracy of the experiment. accuracy;

第三,通过高清内窥镜的设置,使整个实验的过程中岩板样品变化都能进行监控,避免实验过程中的不可控因素,保证实验正常进行;Third, through the setting of a high-definition endoscope, changes in rock plate samples can be monitored during the entire experiment, avoiding uncontrollable factors during the experiment and ensuring the normal conduct of the experiment;

第四,本装置装置结构简单、设计合理,使用操作简便,能够最高模拟温度为120℃,最高模拟压力为30MPa,模拟裂缝-基质压差0~20MPa的高压渗吸过程。Fourth, this device has a simple structure, reasonable design, and is easy to use and operate. It can simulate a maximum temperature of 120°C, a maximum simulated pressure of 30MPa, and simulate a high-pressure imbibition process with a fracture-matrix pressure difference of 0 to 20MPa.

附图说明Description of the drawings

图1为本发明的整体结构示意图;Figure 1 is a schematic diagram of the overall structure of the present invention;

图2为本发明中模拟筒内部结构示意图;Figure 2 is a schematic diagram of the internal structure of the simulation cylinder in the present invention;

附图标记:Reference signs:

1、嵌入式信息处理器;2、控制终端;3、第一平流泵;4、第二平流泵;5、第三平流泵;6、第一进液管;7、第二进液管;8、第三进液管;9、排液管;10、第一阀门;11、第一活塞式中间容器;12、第二活塞式中间容器;13、恒温箱;14、高清内窥镜;15、压力传感器;16、模拟筒;17、玻璃视窗;19、进液口;20、第二阀门;23、视窗固定筒;24、排液口;27、岩板固定筒;28、左内筒;29、围压套;30、右内筒。1. Embedded information processor; 2. Control terminal; 3. First advection pump; 4. Second advection pump; 5. Third advection pump; 6. First liquid inlet pipe; 7. Second liquid inlet pipe ; 8. Third liquid inlet pipe; 9. Discharge pipe; 10. First valve; 11. First piston-type intermediate container; 12. Second piston-type intermediate container; 13. Thermostat; 14. High-definition endoscope ; 15. Pressure sensor; 16. Simulation cylinder; 17. Glass window; 19. Liquid inlet; 20. Second valve; 23. Window fixed cylinder; 24. Drain port; 27. Rock plate fixed cylinder; 28. Left Inner cylinder; 29, confining pressure sleeve; 30, right inner cylinder.

具体实施方式Detailed ways

为了更好地了解本发明的目的、结构及功能,下面结合附图,对本发明一种考虑缝端压差的渗吸物理模拟实验装置及方法做进一步详细的描述。In order to better understand the purpose, structure and function of the present invention, a further detailed description of the imbibition physical simulation experimental device and method of the present invention taking into account the seam-end pressure difference is given below with reference to the accompanying drawings.

如图1、2所示,本发明一种考虑缝端压差的渗吸物理模拟实验装置,包括模拟筒16,模拟筒16的筒身相对的两侧分别开设有三个进液口19与三个排液口24,三个进液口19分别与三个排液口24的位置相对应,模拟筒16内部从左到右依次设置有左内筒28、围压套29与右内筒30,左内筒28、围压套29、右内筒30分别与三个进液口19、三个排液口24的位置相对,左内筒28对应一个进液口19与一个排液口24,围压套29对应一个进液口19与一个排液口24,右内筒30对应一个进液口19与一个排液口24,左内筒28与右内筒30通过围压套29连接,左内筒28、右内筒30分别与模拟筒16内壁相接触且通过密封圈与模拟筒16内壁连接,左内筒28内部、右内筒30内部分别与对应的进液口19、排液口24相连通,围压套29与模拟筒16内壁留有间隔,围压套29内部用于放置岩板样品,模拟筒16外部设置有加压组件,加压组件通过第一进液管6、第二进液管7、第三进液管8分别与三个进液口19相连接,加压组件分别用于对左内筒28内部、围压套29、右内筒30内部施加压力,左内筒28内部的压力、右内筒30内部的压力用于对岩板样品两端进行施加压力,围压套29外壁受压之后与内部的岩板样品紧密接触,将岩板样品除却两端的其他位置密封,保证实验正常进行,模拟筒16外部设置有三个排液管9,三个排液管9分别与三个排液口24相连接,三个排液管9上设置有检测组件,检测组件用于检测三个排液管9内部的液体压力变化。As shown in Figures 1 and 2, the present invention is an imbibition physical simulation experimental device that considers seam end pressure difference, including a simulation cylinder 16. The cylinder body of the simulation cylinder 16 is provided with three liquid inlets 19 and three liquid inlets on opposite sides. There are three liquid discharge ports 24, and three liquid inlets 19 respectively correspond to the positions of the three liquid discharge ports 24. The interior of the simulation cylinder 16 is provided with a left inner cylinder 28, a confining pressure sleeve 29 and a right inner cylinder 30 in sequence from left to right. , the left inner cylinder 28, the confining pressure sleeve 29, and the right inner cylinder 30 are respectively opposite to the positions of three liquid inlets 19 and three liquid discharge ports 24. The left inner cylinder 28 corresponds to one liquid inlet 19 and one liquid discharge port 24. , the confining pressure sleeve 29 corresponds to a liquid inlet 19 and a liquid discharge port 24, the right inner cylinder 30 corresponds to a liquid inlet 19 and a liquid discharge port 24, the left inner cylinder 28 and the right inner cylinder 30 are connected through the confining pressure sleeve 29 , the left inner cylinder 28 and the right inner cylinder 30 are respectively in contact with the inner wall of the simulation cylinder 16 and connected to the inner wall of the simulation cylinder 16 through a sealing ring. The inside of the left inner cylinder 28 and the right inner cylinder 30 are respectively connected with the corresponding liquid inlet 19 and exhaust port. The liquid port 24 is connected, and there is a gap between the confining pressure sleeve 29 and the inner wall of the simulation cylinder 16. The inside of the confining pressure sleeve 29 is used to place the rock plate sample, and the simulation cylinder 16 is provided with a pressurizing component outside, and the pressurizing component passes through the first liquid inlet pipe. 6. The second liquid inlet pipe 7 and the third liquid inlet pipe 8 are connected to the three liquid inlets 19 respectively. The pressurizing components are respectively used to apply pressure to the inside of the left inner cylinder 28, the confining pressure sleeve 29, and the right inner cylinder 30. Pressure, the pressure inside the left inner cylinder 28 and the pressure inside the right inner cylinder 30 are used to exert pressure on both ends of the rock plate sample. After the outer wall of the confining pressure sleeve 29 is pressed, it is in close contact with the internal rock plate sample, and the rock plate sample is In addition to sealing at other positions at both ends to ensure normal operation of the experiment, three drain pipes 9 are provided outside the simulation cylinder 16. The three drain pipes 9 are respectively connected to the three drain ports 24. The three drain pipes 9 are provided with The detection component is used to detect changes in liquid pressure inside the three drain pipes 9 .

加压组件包括第一平流泵3、第二平流泵4与第三平流泵5,第一平流泵3通过第一进液管6与靠近左内筒28的进液口19相连接,第二平流泵4通过第二进液管7与靠近围压套29的进液口19相连接,第三平流泵5通过第三进液管8与靠近右内筒30的进液口19相连接,第一平流泵3上设置有第一活塞式中间容器11,第三进液管8上设置有第二活塞式中间容器12,第一进液管6、第二进液管7、第三进液管8上分别设置有第一阀门10。The pressurizing assembly includes a first advection pump 3, a second advection pump 4 and a third advection pump 5. The first advection pump 3 is connected to the liquid inlet 19 near the left inner cylinder 28 through the first liquid inlet pipe 6. The second advection pump 4 is connected to the liquid inlet 19 near the confining pressure sleeve 29 through the second liquid inlet pipe 7, and the third advection pump 5 is connected to the liquid inlet 19 near the right inner cylinder 30 through the third liquid inlet pipe 8. connection, the first advection pump 3 is provided with a first piston-type intermediate container 11, the third liquid inlet pipe 8 is provided with a second piston-type intermediate container 12, the first liquid inlet pipe 6, the second liquid inlet pipe 7, and the The three liquid inlet pipes 8 are respectively provided with first valves 10 .

本发明还包括恒温箱13,模拟筒16、第一活塞式中间容器11、第二活塞式中间容器12、检测组件分别位于恒温箱13内,恒温箱13为实现提供稳定的稳定,恒温箱的温控范围为:-10℃~160℃。The present invention also includes a thermostatic box 13. The simulation cylinder 16, the first piston-type intermediate container 11, the second piston-type intermediate container 12, and the detection component are respectively located in the thermostatic box 13. The thermostatic box 13 provides stable stability for the realization of the thermostatic box. The temperature control range is: -10℃~160℃.

检测组件包括三个压力传感器15,三个压力传感器15分别设置在三个排液管9上,每一个排液管9远离模拟筒16的端部设置有三通管,压力传感器15设置在三通管的一个接口,三通管的另一个接口设置有第二阀门20。The detection component includes three pressure sensors 15. The three pressure sensors 15 are respectively arranged on the three drain pipes 9. Each drain pipe 9 is provided with a three-way pipe at the end far away from the simulation tube 16. The pressure sensor 15 is installed on the tee. One interface of the tee pipe and the other interface of the tee pipe are provided with a second valve 20 .

恒温箱13外部设置有嵌入式信息处理器1,嵌入式信息处理器1分别与三个压力传感器15电连接,嵌入式信息处理器1一侧设置有控制终端2,控制终端2与嵌入式信息处理器1电连接,嵌入式信息处理器1采集到三个压力传感器15的压力值后将其反馈到控制终端2。An embedded information processor 1 is provided outside the thermostatic box 13. The embedded information processor 1 is electrically connected to three pressure sensors 15 respectively. A control terminal 2 is provided on one side of the embedded information processor 1. The control terminal 2 is connected to the embedded information processor 1. The processor 1 is electrically connected. The embedded information processor 1 collects the pressure values of the three pressure sensors 15 and then feeds them back to the control terminal 2 .

模拟筒16的两端为开口结构,模拟筒16的两端分别设置有视窗固定筒23,每一个视窗固定筒23与模拟筒16内壁螺纹连接,每一个视窗固定筒23内部设置有玻璃视窗17,每一个视窗固定筒23外部靠近玻璃视窗17的位置设置有高清内窥镜14,高清内窥镜14与控制终端2电连接,两个高清内窥镜14用于实时采集两个玻璃视窗17内的岩板样品变化的视频信息并将其反馈到控制终端2,高清内窥镜14的分辨率为2000万像素。The two ends of the simulation tube 16 are open structures, and the two ends of the simulation tube 16 are respectively provided with window fixing tubes 23. Each window fixing tube 23 is threadedly connected to the inner wall of the simulation tube 16, and each window fixing tube 23 is provided with a glass window 17 inside. , a high-definition endoscope 14 is provided outside each window fixed barrel 23 close to the glass window 17. The high-definition endoscope 14 is electrically connected to the control terminal 2. The two high-definition endoscopes 14 are used to collect the two glass windows 17 in real time. The video information of changes in the rock plate sample inside is fed back to the control terminal 2. The resolution of the high-definition endoscope 14 is 20 million pixels.

右内筒30内靠近围压套29的位置设置有岩板固定筒27,岩板固定筒27不会对进液口19与排液口24进行遮挡,岩板固定筒27与右内筒30内壁螺纹连接,岩板固定筒27用于固定岩板样品的一端,固定岩板样品的另一端抵在左内筒28的端部。A rock plate fixed cylinder 27 is provided in the right inner cylinder 30 close to the confining pressure sleeve 29. The rock plate fixed cylinder 27 will not block the liquid inlet 19 and the liquid discharge port 24. The rock plate fixed cylinder 27 and the right inner cylinder 30 The inner wall is threaded, and the rock plate fixing cylinder 27 is used to fix one end of the rock plate sample, and the other end of the fixed rock plate sample is against the end of the left inner cylinder 28.

一种考虑缝端压差的渗吸物理模拟实验方法,包括以下步骤:An imbibition physical simulation experimental method considering the seam-end pressure difference, including the following steps:

步骤一,岩板样品准备:利用抽真空法测量岩板的孔隙度,测量岩板的厚度和直径,利用皂膜法测定岩板的渗透率,筛选出符合要求的岩板样品,然后分别将配置好的模拟渗吸液和模拟油注入第一活塞式中间容器11和第二活塞式中间容器12的活塞上部,将恒温箱13的温度设定到模拟温度;Step 1. Preparation of rock plate samples: Use the vacuum method to measure the porosity of the rock plate, measure the thickness and diameter of the rock plate, use the soap film method to measure the permeability of the rock plate, screen out the rock plate samples that meet the requirements, and then separate them. The configured simulated imbibition liquid and simulated oil are injected into the piston upper parts of the first piston-type intermediate container 11 and the second piston-type intermediate container 12, and the temperature of the thermostatic box 13 is set to the simulated temperature;

步骤二,装填岩板样品:依次打开模拟筒16右侧的视窗固定筒23和岩板固定筒27,将岩板样品放置在围压套29中,并依次旋紧岩板固定筒27和视窗固定筒23,然后打开第二平流泵4,将第二平流泵4设定为实验设定的围压值,保持压力稳定,打开第二进液管7上的第一阀门10和第二进液管7对应的排液管9上的第二阀门20,当第二排液通道的出口端出现煤油后,关闭第二进液管7对应的排液管9上的第二阀门20,通过煤油的压力挤压围压套29,使围压套29与岩板样品紧密接触,将岩板样品除却两端的其他位置密封;Step two, load the rock plate sample: Open the window fixing tube 23 and the rock plate fixing tube 27 on the right side of the simulation tube 16 in sequence, place the rock plate sample in the confining pressure sleeve 29, and tighten the rock plate fixing tube 27 and the window in sequence. Fix the cylinder 23, then open the second advection pump 4, set the second advection pump 4 to the experimentally set confining pressure value, keep the pressure stable, open the first valve 10 and the second inlet pipe on the second liquid inlet pipe 7 The second valve 20 on the drain pipe 9 corresponding to the liquid pipe 7, when kerosene appears at the outlet end of the second drain channel, closes the second valve 20 on the drain pipe 9 corresponding to the second liquid inlet pipe 7, and passes The pressure of kerosene squeezes the confining pressure sleeve 29 so that the confining pressure sleeve 29 is in close contact with the rock plate sample, and the rock plate sample is sealed except for both ends;

步骤三,充注模拟液:依次打开第一进液管6、第三进液管8上的第一阀门10以及第一进液管6对应的排液管9上的第二阀门20、第三进液管8对应的排液管9上的第二阀门20,同时打开第一平流泵3、第三平流泵5,开始向左内筒28与右内筒30分别充注模拟渗吸液和模拟油,当第一进液管6对应的排液管9出现模拟渗吸液,第三进液管8对应的排液管9出口端出现模拟油后,关闭两个排液管9上的第二阀门20和第一平流泵3、第三平流泵5;Step 3: Fill the simulated liquid: sequentially open the first valve 10 on the first liquid inlet pipe 6 and the third liquid inlet pipe 8 and the second valve 20 on the discharge pipe 9 corresponding to the first liquid inlet pipe 6. The second valve 20 on the discharge pipe 9 corresponding to the three inlet pipes 8 opens the first advection pump 3 and the third advection pump 5 at the same time, and starts to fill the left inner cylinder 28 and the right inner cylinder 30 with simulated imbibition respectively. liquid and simulated oil. When simulated suction liquid appears in the drain pipe 9 corresponding to the first liquid inlet pipe 6 and simulated oil appears at the outlet end of the drain pipe 9 corresponding to the third liquid inlet pipe 8, close the two drain pipes 9 the second valve 20 and the first advection pump 3 and the third advection pump 5;

步骤四,高压渗吸模拟:打开第一平流泵3、第三平流泵5,并设定为对应的恒定压力值,保持左内筒28与右内筒30内具有不同的压力,岩板样品在左右两侧液体施加的不同压力下发生渗吸交换;Step 4, high-pressure imbibition simulation: turn on the first advection pump 3 and the third advection pump 5, and set them to corresponding constant pressure values, keeping the left inner cylinder 28 and the right inner cylinder 30 at different pressures. The sample undergoes imbibition exchange under different pressures exerted by the liquid on the left and right sides;

步骤五,数据动态采集:从充注模拟液开始,嵌入式信息处理器1每分钟采集三个压力传感器15上的压力值并将其反馈到控制终端2,同时两个高清内窥镜14实时采集两个玻璃视窗17内的岩板样品变化的视频信息并将其反馈到控制终端2;Step 5, dynamic data collection: Starting from filling the simulation fluid, the embedded information processor 1 collects the pressure values on the three pressure sensors 15 every minute and feeds them back to the control terminal 2. At the same time, the two high-definition endoscopes 14 real-time Collect the video information of changes in the rock slab samples in the two glass windows 17 and feed it back to the control terminal 2;

步骤六,模拟结束:当左内筒28与右内筒30内的压力差稳定后,即可停止模拟实验,关闭实验装置,排除模拟液,取出岩板用保鲜膜包裹,清洗实验装置。Step 6: End of simulation: When the pressure difference between the left inner cylinder 28 and the right inner cylinder 30 is stable, the simulation experiment can be stopped, the experimental device is closed, the simulation liquid is removed, the rock slab is taken out and wrapped in plastic wrap, and the experimental device is cleaned.

其中,步骤一中模拟油为3#白油、5#白油、7#白油和10#白油中的一种,所述步骤一中模拟渗吸液由重水、氟化液、水中的一种配制。Among them, the simulated oil in step one is one of 3# white oil, 5# white oil, 7# white oil and 10# white oil. In the step one, the simulated imbibition liquid is composed of heavy water, fluorinated liquid, and water. A preparation.

其中,还包括步骤七,岩板样品分析:将实验前的干燥的岩板样品、饱和模拟油的岩板样品以及模拟渗吸实验后的岩板样品进行核磁共振监测,对三个时间段的岩板样品中的氢信号量进行检测,并分析三个时间段的岩板样品中的氢信号量变化,确定岩板样品在不同温度压力条件下渗吸量,其中饱和模拟油的岩板样品为干燥的岩板样品吸收模拟油饱和后的岩板样品。It also includes step seven, rock plate sample analysis: conduct nuclear magnetic resonance monitoring on the dry rock plate samples before the experiment, the rock plate samples saturated with simulated oil, and the rock plate samples after the simulated imbibition experiment. The hydrogen signal amount in the rock plate samples was detected, and the changes in the hydrogen signal amount in the rock plate samples in three time periods were analyzed to determine the amount of imbibition of the rock plate samples under different temperature and pressure conditions. Among them, the rock plate samples saturated with simulated oil Simulate oil saturated rock sample absorption for dry rock sample.

其中干样岩板的核磁共振氢信号量=干样核磁共振曲线的面积;Among them, the NMR hydrogen signal amount of the dry sample rock plate = the area of the NMR curve of the dry sample;

饱和模拟油岩板的核磁共振氢信号量=饱和模拟油样核磁共振曲线的面积-干样核磁共振曲线的面积;The NMR hydrogen signal amount of the saturated simulated oil rock plate = the area of the NMR curve of the saturated simulated oil sample - the area of the NMR curve of the dry sample;

渗吸排液后岩板的核磁共振氢信号量=饱和模拟油岩板的核磁共振氢信号量-渗吸实验后样品核磁共振曲线的面积;The NMR hydrogen signal of the rock plate after imbibition and drainage = the NMR hydrogen signal of the saturated simulated oil rock plate - the area of the NMR curve of the sample after the imbibition experiment;

渗吸排液效率=渗吸排液后岩板的核磁共振氢信号量*100/饱和模拟油岩板的核磁共振氢信号量。The efficiency of imbibition and drainage = the NMR hydrogen signal of the rock slab after imbibition and drainage * 100 / the NMR hydrogen signal of the saturated simulated oil rock slab.

其中,最高模拟温度为120℃,最高模拟压力为30MPa,模拟裂缝-基质压差0~20MPa。Among them, the maximum simulated temperature is 120°C, the maximum simulated pressure is 30MPa, and the simulated fracture-matrix pressure difference is 0 to 20MPa.

工作原理:使用时,首先利用抽真空法测量岩板的孔隙度,测量岩板的厚度和直径,利用皂膜法测定岩板的渗透率,分别将配置好的模拟渗吸液和模拟油注入第一活塞式中间容器11和第二活塞式中间容器12的活塞上部,将恒温箱13的温度设定到模拟温度,然后依次打开模拟筒16右侧的视窗固定筒23和岩板固定筒27,将岩板样品放置在围压套29中,并依次旋紧岩板固定筒27和视窗固定筒23,然后打开第二平流泵4,将第二平流泵4设定为实验设定的围压值,保持压力稳定,打开第二进液管7上的第一阀门10和第二进液管7对应的排液管9上的第二阀门20,当第二排液通道的出口端出现煤油后,关闭第二进液管7对应的排液管9上的第二阀门20,通过煤油的压力挤压围压套29,使围压套29与岩板样品紧密接触,将岩板样品除却两端的其他位置密封,然后依次打开第一进液管6、第三进液管8上的第一阀门10以及第一进液管6对应的排液管9上的第二阀门20、第三进液管8对应的排液管9上的第二阀门20,同时打开第一平流泵3、第三平流泵5,开始向左内筒28与右内筒30分别充注模拟渗吸液和模拟油,当第一进液管6对应的排液管9出现模拟渗吸液,第三进液管8对应的排液管9出口端出现模拟油后,关闭两个排液管9上的第二阀门20和第一平流泵3、第三平流泵5,再然后打开第一平流泵3、第三平流泵5,并设定为对应的恒定压力值,保持左内筒28与右内筒30内具有不同的压力,岩板样品在左右两侧液体施加的不同压力下发生渗吸交换,从充注模拟液开始,嵌入式信息处理器1每分钟采集三个压力传感器15上的压力值并将其反馈到控制终端2,同时两个高清内窥镜14实时采集两个玻璃视窗17内的岩板样品变化的视频信息并将其反馈到控制终端2,当左内筒28与右内筒30内的压力差稳定后,即可停止模拟实验,关闭实验装置,排除模拟液,取出岩板用保鲜膜包裹,清洗实验装置,最后将实验前的干燥的岩板样品、饱和模拟油的岩板样品以及模拟渗吸实验后的岩板样品进行核磁共振监测,对三个时间段的岩板样品中的氢含量进行检测,并分析三个时间段的岩板样品中的氢含量变化,确定岩板样品在不同温度压力条件下渗吸量。Working principle: When using, first use the vacuum method to measure the porosity of the rock plate, measure the thickness and diameter of the rock plate, use the soap film method to measure the permeability of the rock plate, and inject the configured simulated imbibition liquid and simulated oil respectively. Set the temperature of the thermostatic box 13 to the simulated temperature on the piston upper parts of the first piston-type intermediate container 11 and the second piston-type intermediate container 12, and then open the window fixing cylinder 23 and the rock plate fixing cylinder 27 on the right side of the simulation cylinder 16 in sequence. , place the rock plate sample in the confining pressure sleeve 29, and tighten the rock plate fixing cylinder 27 and the window fixing cylinder 23 in sequence, then open the second advection pump 4, and set the second advection pump 4 to the experimental setting. Pressure value, keep the pressure stable, open the first valve 10 on the second liquid inlet pipe 7 and the second valve 20 on the discharge pipe 9 corresponding to the second liquid inlet pipe 7, when the outlet end of the second liquid discharge channel appears After the kerosene is discharged, close the second valve 20 on the discharge pipe 9 corresponding to the second liquid inlet pipe 7, squeeze the confining pressure sleeve 29 through the pressure of kerosene, so that the confining pressure sleeve 29 is in close contact with the rock plate sample, and the rock plate sample is Remove the other seals at both ends, and then open the first valve 10 on the first liquid inlet pipe 6, the third liquid inlet pipe 8 and the second valve 20 on the discharge pipe 9 corresponding to the first liquid inlet pipe 6. The second valve 20 on the discharge pipe 9 corresponding to the three inlet pipes 8 opens the first advection pump 3 and the third advection pump 5 at the same time, and starts to fill the left inner cylinder 28 and the right inner cylinder 30 with simulated imbibition respectively. liquid and simulated oil. When simulated suction liquid appears in the drain pipe 9 corresponding to the first liquid inlet pipe 6 and simulated oil appears at the outlet end of the drain pipe 9 corresponding to the third liquid inlet pipe 8, close the two drain pipes 9 on the second valve 20 and the first advection pump 3 and the third advection pump 5, and then open the first advection pump 3 and the third advection pump 5, and set them to the corresponding constant pressure value, keeping the left inner cylinder 28 and the right inner cylinder 30 have different pressures. The rock plate sample undergoes imbibition and exchange under the different pressures exerted by the liquids on the left and right sides. Starting from the filling of the simulation fluid, the embedded information processor 1 collects three pressure sensors per minute. 15 and feed it back to the control terminal 2. At the same time, two high-definition endoscopes 14 collect the video information of the rock plate sample changes in the two glass windows 17 in real time and feed it back to the control terminal 2. When the left inner After the pressure difference between the cylinder 28 and the right inner cylinder 30 is stable, the simulation experiment can be stopped, the experimental device is closed, the simulation liquid is removed, the rock slab is taken out and wrapped in plastic wrap, the experimental device is cleaned, and finally the dried rock slab sample before the experiment is , rock plate samples saturated with simulated oil and rock plate samples after simulated imbibition experiments were monitored by nuclear magnetic resonance, the hydrogen content in the rock plate samples in three time periods was detected, and the hydrogen content in the rock plate samples in the three time periods was analyzed. Changes in hydrogen content are used to determine the amount of imbibition of rock plate samples under different temperature and pressure conditions.

本发明的一种考虑缝端压差的渗吸物理模拟实验装置及方法具有以下优点:The imbibition physical simulation experimental device and method of the present invention that considers the seam end pressure difference have the following advantages:

第一,通过模拟筒、左内筒、围压套、右内筒与加压组件的配合设置,能够对岩板样品的两端进行施压且两端能够处于不同的压力状态下,使岩板样品在左右两侧液体施加的不同压力下发生渗吸交换,模拟实际情况下岩板处于裂缝与基质之间存在压差条件下的渗吸采油过程,保证了实验的精度,使其更加接近实际采油过程;First, through the combination of the simulation cylinder, the left inner cylinder, the confining pressure sleeve, the right inner cylinder and the pressurizing assembly, both ends of the rock plate sample can be pressurized and the two ends can be in different pressure states, making the rock The plate sample undergoes imbibition exchange under different pressures exerted by the liquid on the left and right sides, simulating the actual imbibition oil recovery process when the rock plate is in a pressure difference between the crack and the matrix, ensuring the accuracy of the experiment and making it closer Actual oil production process;

第二,通过围压套的设置,使围压套在受力的作用下能够与岩板样品紧密接触,从而使岩板样品除却两端的其他位置密封,确保了实验的正常进行,保证的实验的精度;Second, through the setting of the confining sleeve, the confining sleeve can be in close contact with the rock plate sample under the action of force, thereby sealing the rock plate sample except at both ends, ensuring the normal conduct of the experiment and ensuring the accuracy of the experiment. accuracy;

第三,通过高清内窥镜的设置,使整个实验的过程中岩板样品变化都能进行监控,避免实验过程中的不可控因素,保证实验正常进行;Third, through the setting of a high-definition endoscope, changes in rock plate samples can be monitored during the entire experiment, avoiding uncontrollable factors during the experiment and ensuring the normal conduct of the experiment;

第四,本装置装置结构简单、设计合理,使用操作简便,能够最高模拟温度为120℃,最高模拟压力为30MPa,模拟裂缝-基质压差0~20MPa的高压渗吸过程。Fourth, this device has a simple structure, reasonable design, and is easy to use and operate. It can simulate a maximum temperature of 120°C, a maximum simulated pressure of 30MPa, and simulate a high-pressure imbibition process with a fracture-matrix pressure difference of 0 to 20MPa.

可以理解,本发明是通过一些实施例进行描述的,本领域技术人员知悉的,在不脱离本发明的精神和范围的情况下,可以对这些特征和实施例进行各种改变或等效替换。另外,在本发明的教导下,可以对这些特征和实施例进行修改以适应具体的情况及材料而不会脱离本发明的精神和范围。因此,本发明不受此处所公开的具体实施例的限制,所有落入本申请的权利要求范围内的实施例都属于本发明所保护的范围内。It is understood that the present invention has been described through some embodiments. Those skilled in the art know that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, the features and embodiments may be modified to adapt a particular situation and material to the teachings of the invention without departing from the spirit and scope of the invention. Therefore, the present invention is not limited to the specific embodiments disclosed here, and all embodiments falling within the scope of the claims of the present application are within the scope of protection of the present invention.

Claims (5)

1. Imbibition physical simulation experiment device considering slit end pressure difference is characterized by comprising:
the simulation cylinder (16) is provided with three liquid inlets (19) and three liquid outlets (24) on two opposite sides of the cylinder body respectively;
the device comprises a left inner cylinder (28), a confining pressure sleeve (29) and a right inner cylinder (30), wherein the left inner cylinder (28), the confining pressure sleeve (29) and the right inner cylinder (30) are sequentially arranged inside a simulation cylinder (16) from left to right and are respectively opposite to three liquid inlets (19) and three liquid outlets (24), the left inner cylinder (28) and the right inner cylinder (30) are connected through the confining pressure sleeve (29), the left inner cylinder (28) and the right inner cylinder (30) are respectively contacted with the inner wall of the simulation cylinder (16), the inside of the left inner cylinder (28) and the inside of the right inner cylinder (30) are respectively communicated with the corresponding liquid inlets (19) and the corresponding liquid outlets (24), a space is reserved between the confining pressure sleeve (29) and the inner wall of the simulation cylinder (16), and the inside of the confining pressure sleeve (29) is used for placing rock plate samples;
the pressurizing assembly is arranged outside the simulation cylinder (16), is connected with three liquid inlets (19) through a first liquid inlet pipe (6), a second liquid inlet pipe (7) and a third liquid inlet pipe (8) respectively, and is used for applying pressure to the inside of the left inner cylinder (28), the inside of the confining pressure sleeve (29) and the inside of the right inner cylinder (30) respectively, and keeping different pressures in the left inner cylinder (28) and the inside of the right inner cylinder (30), so that the rock plate sample is subjected to imbibition exchange under the different pressures applied by the liquid at the left side and the right side;
three liquid discharge pipes (9) which are arranged outside the simulation cylinder (16) and are respectively connected with three liquid discharge ports (24);
the detection assembly is arranged on the three liquid discharge pipes (9) and is used for detecting the liquid pressure change in the three liquid discharge pipes (9);
the pressurizing assembly comprises a first advection pump (3), a second advection pump (4) and a third advection pump (5), the first advection pump (3) is connected with a liquid inlet (19) close to a left inner cylinder (28) through a first liquid inlet pipe (6), the second advection pump (4) is connected with a liquid inlet (19) close to a confining pressure sleeve (29) through a second liquid inlet pipe (7), the third advection pump (5) is connected with a liquid inlet (19) close to a right inner cylinder (30) through a third liquid inlet pipe (8), a first piston type intermediate container (11) is arranged on the first advection pump (3), a second piston type intermediate container (12) is arranged on the third liquid inlet pipe (8), a first valve (10) is respectively arranged on the first liquid inlet pipe (6), the second liquid inlet pipe (7) and the third liquid inlet pipe (8), an analog liquid permeation type intermediate container (12) is arranged in the first piston type intermediate container (11);
the device also comprises an incubator (13), wherein the simulation cylinder (16), the first piston type intermediate container (11), the second piston type intermediate container (12) and the detection assembly are respectively positioned in the incubator (13);
the detection assembly comprises three pressure sensors (15), the three pressure sensors (15) are respectively arranged on three liquid discharge pipes (9), a three-way pipe is arranged at the end part, far away from the simulation cylinder (16), of each liquid discharge pipe (9), the pressure sensors (15) are arranged at one interface of the three-way pipe, and a second valve (20) is arranged at the other interface of the three-way pipe.
2. The seepage physical simulation experiment device considering the seam end pressure difference according to claim 1, wherein an embedded information processor (1) is arranged outside the incubator (13), the embedded information processor (1) is respectively and electrically connected with three pressure sensors (15), a control terminal (2) is arranged on one side of the embedded information processor (1), and the control terminal (2) is electrically connected with the embedded information processor (1).
3. The seepage physical simulation experiment device considering the seam end pressure difference according to claim 2, wherein two ends of the simulation cylinder (16) are of an opening structure, window fixing cylinders (23) are respectively arranged at two ends of the simulation cylinder (16), each window fixing cylinder (23) is in threaded connection with the inner wall of the simulation cylinder (16), a glass window (17) is arranged in each window fixing cylinder (23), a high-definition endoscope (14) is arranged at a position, close to the glass window (17), outside each window fixing cylinder (23), and the high-definition endoscope (14) is electrically connected with the control terminal (2).
4. A seepage physical simulation experiment device considering a seam end pressure difference according to claim 3, wherein a rock plate fixing cylinder (27) is arranged in the right inner cylinder (30) at a position close to the confining pressure sleeve (29), and the rock plate fixing cylinder 27 is in threaded connection with the inner wall of the right inner cylinder 30.
5. A seepage physical simulation experiment method considering the pressure difference of a seam end, which adopts the seepage physical simulation experiment device considering the pressure difference of the seam end as claimed in claim 4, and is characterized by comprising the following steps:
step one, preparing a rock plate sample: measuring the porosity of a rock plate by using a vacuumizing method, measuring the thickness and the diameter of the rock plate, measuring the permeability of the rock plate by using a soap film method, screening out a rock plate sample meeting the requirements, then respectively injecting the configured simulated seepage liquid and simulated oil into the upper parts of pistons of a first piston type intermediate container (11) and a second piston type intermediate container (12), and setting the temperature of a constant temperature box (13) to a simulated temperature;
step two, filling a rock plate sample: sequentially opening a window fixing cylinder (23) and a rock plate fixing cylinder (27) on the right side of the simulation cylinder (16), placing a rock plate sample in a surrounding pressure sleeve (29), sequentially screwing the rock plate fixing cylinder (27) and the window fixing cylinder (23), then opening a second parallel flow pump (4), setting the second parallel flow pump (4) to be a set experimental surrounding pressure value, keeping stable pressure, opening a first valve (10) on a second liquid inlet pipe (7) and a second valve (20) on a liquid discharge pipe (9) corresponding to the second liquid inlet pipe (7), closing the second valve (20) on the liquid discharge pipe (9) corresponding to the second liquid inlet pipe (7) after kerosene appears at the outlet end of a second liquid discharge channel, extruding the surrounding pressure sleeve (29) through the pressure of the kerosene, enabling the surrounding pressure sleeve (29) to be in close contact with the rock plate sample, and sealing other positions at two ends of the rock plate sample;
step three, filling injection molding liquid: sequentially opening a first valve (10) on a first liquid inlet pipe (6) and a third liquid inlet pipe (8) and a second valve (20) on a liquid outlet pipe (9) corresponding to the first liquid inlet pipe (6) and a second valve (20) on a liquid outlet pipe (9) corresponding to the third liquid inlet pipe (8), simultaneously opening a first advection pump (3) and a third advection pump (5), starting to fill an injection simulated permeation liquid and simulated oil into a left inner cylinder (28) and a right inner cylinder (30) respectively, and closing the second valves (20) on the two liquid outlet pipes (9) and the first advection pump (3) and the third advection pump (5) after simulated oil appears at the outlet end of the liquid outlet pipe (9) corresponding to the first liquid inlet pipe (6);
step four, high-pressure imbibition simulation: the first advection pump (3) and the third advection pump (5) are opened, the corresponding constant pressure values are set, different pressures are kept in the left inner cylinder (28) and the right inner cylinder (30), and the rock plate sample is subjected to imbibition exchange under different pressures exerted by the liquid at the left side and the right side;
step five, data dynamic acquisition: starting from filling the simulation liquid, the embedded information processor (1) collects pressure values on three pressure sensors (15) every minute and feeds the pressure values back to the control terminal (2), and simultaneously, the two high-definition endoscopes (14) collect video information of rock plate sample changes in the two glass windows (17) in real time and feed the video information back to the control terminal (2);
step six, simulation is ended: after the pressure difference between the left inner cylinder (28) and the right inner cylinder (30) is stable, stopping the simulation experiment, closing the experiment device, removing the simulation liquid, taking out the rock plate, wrapping the rock plate with a preservative film, and cleaning the experiment device;
the simulated oil in the first step is one of 3# white oil, 5# white oil, 7# white oil and 10# white oil, and the simulated seepage liquid in the first step is prepared from one of heavy water, fluoridized liquid and water;
and step seven, rock plate sample analysis: and performing nuclear magnetic resonance monitoring on the dried rock plate sample before the experiment, the rock plate sample saturated with the simulated oil and the rock plate sample simulated after the imbibition experiment, detecting hydrogen signal quantity in the rock plate sample in three time periods, analyzing the hydrogen signal quantity change in the rock plate sample in three time periods, and determining imbibition quantity of the rock plate sample under different temperature and pressure conditions.
CN202210793484.4A 2022-07-07 2022-07-07 An imbibition physical simulation experimental device and method considering seam end pressure difference Active CN115078222B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210793484.4A CN115078222B (en) 2022-07-07 2022-07-07 An imbibition physical simulation experimental device and method considering seam end pressure difference

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210793484.4A CN115078222B (en) 2022-07-07 2022-07-07 An imbibition physical simulation experimental device and method considering seam end pressure difference

Publications (2)

Publication Number Publication Date
CN115078222A CN115078222A (en) 2022-09-20
CN115078222B true CN115078222B (en) 2023-10-27

Family

ID=83257199

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210793484.4A Active CN115078222B (en) 2022-07-07 2022-07-07 An imbibition physical simulation experimental device and method considering seam end pressure difference

Country Status (1)

Country Link
CN (1) CN115078222B (en)

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106248545A (en) * 2015-06-04 2016-12-21 中国石油化工股份有限公司 The determinator of the Test Liquid Permeability of Core of tight rock and method under reservoir conditions
CN108333098A (en) * 2018-05-03 2018-07-27 西南石油大学 Shale gas reservoir micro-fractures high-temperature and high-pressure visual air water two phase fluid flow experimental provision
CN108801870A (en) * 2018-03-26 2018-11-13 中国石油大学(北京) It is a kind of can under simulation stratum condition reservoir rock imbibition experimental provision and method
CN110261280A (en) * 2019-07-19 2019-09-20 西南石油大学 A kind of reverse imbibition on-line monitoring experimental provision of high temperature and pressure rock core and experimental method
CN111257202A (en) * 2020-04-07 2020-06-09 西南石油大学 Shale fracturing fluid forced imbibition and flowback experimental method under condition of containing adsorbed gas
CN210775151U (en) * 2019-08-27 2020-06-16 中国石油集团西部钻探工程有限公司 Spontaneous imbibition experimental device for compact sensitive reservoir
CN211287650U (en) * 2019-12-27 2020-08-18 延长油田股份有限公司志丹采油厂 Experimental device is inhaled to infiltration under pulse action
CN112858133A (en) * 2021-01-12 2021-05-28 西安石油大学 Method for evaluating dynamic imbibition displacement rule of tight oil reservoir fracture
CN213398109U (en) * 2020-11-02 2021-06-08 江苏宏博机械制造有限公司 Coal petrography sample hole oozes and adsorbs analogue means
CN215770540U (en) * 2020-12-02 2022-02-08 哈尔滨工程大学 Rod bundle channel gas-liquid two-phase flow refinement measurement experiment body device
CN114460120A (en) * 2021-10-27 2022-05-10 中国石油化工股份有限公司 Simulation experiment device and method for dense oil imbibition replacement based on nuclear magnetic resonance

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106248545A (en) * 2015-06-04 2016-12-21 中国石油化工股份有限公司 The determinator of the Test Liquid Permeability of Core of tight rock and method under reservoir conditions
CN108801870A (en) * 2018-03-26 2018-11-13 中国石油大学(北京) It is a kind of can under simulation stratum condition reservoir rock imbibition experimental provision and method
CN108333098A (en) * 2018-05-03 2018-07-27 西南石油大学 Shale gas reservoir micro-fractures high-temperature and high-pressure visual air water two phase fluid flow experimental provision
CN110261280A (en) * 2019-07-19 2019-09-20 西南石油大学 A kind of reverse imbibition on-line monitoring experimental provision of high temperature and pressure rock core and experimental method
CN210775151U (en) * 2019-08-27 2020-06-16 中国石油集团西部钻探工程有限公司 Spontaneous imbibition experimental device for compact sensitive reservoir
CN211287650U (en) * 2019-12-27 2020-08-18 延长油田股份有限公司志丹采油厂 Experimental device is inhaled to infiltration under pulse action
CN111257202A (en) * 2020-04-07 2020-06-09 西南石油大学 Shale fracturing fluid forced imbibition and flowback experimental method under condition of containing adsorbed gas
CN213398109U (en) * 2020-11-02 2021-06-08 江苏宏博机械制造有限公司 Coal petrography sample hole oozes and adsorbs analogue means
CN215770540U (en) * 2020-12-02 2022-02-08 哈尔滨工程大学 Rod bundle channel gas-liquid two-phase flow refinement measurement experiment body device
CN112858133A (en) * 2021-01-12 2021-05-28 西安石油大学 Method for evaluating dynamic imbibition displacement rule of tight oil reservoir fracture
CN114460120A (en) * 2021-10-27 2022-05-10 中国石油化工股份有限公司 Simulation experiment device and method for dense oil imbibition replacement based on nuclear magnetic resonance

Also Published As

Publication number Publication date
CN115078222A (en) 2022-09-20

Similar Documents

Publication Publication Date Title
CN204679347U (en) A kind of drilling fluid pressurization sealing crushing test device
CN106018748B (en) A kind of Single Fracture rock mass fluid structurecoupling pilot system and test method
CN103233725B (en) Device and method for determining high temperature and high pressure full diameter core mud pollution evaluation
CN205670146U (en) A kind of Fractured Gas Reservoir working solution damage appraisement device of simulation stratum condition
CN107063963A (en) A kind of compact reservoir microcrack extension and the test device and method of seepage flow characteristics
CN107741390A (en) A Physical Simulation Method for Reproducing the Propagation Law of Micro-fractures Induced by Water Injection under Formation Conditions
CN104614249B (en) Pressure chamber testing device and testing method for monitoring rock breaking multivariate precursory information
CN103485762A (en) Visual simulation shale micro-crack plugging capacity test system and method
CN110924907B (en) Multi-section pressure measurement water-gas alternating oil extraction experimental device and method for CT scanning
CN105756674A (en) Crack-substrate coupling flow damage evaluating device and method by simulating formation conditions
CN103698216B (en) A kind of stress sensitive system safety testing device of capillary pressure and method
CN105067494A (en) Permeability testing method and device based on radial percolation experiment
CN107063968B (en) Concrete gas permeability testing device and method
CN115219739B (en) Experimental method for simulating condensate gas reservoir anti-condensate damage based on microfluidic
CN113376057A (en) Grouting visual test system with controllable viscosity and solidification characteristics
CN113137223A (en) Drilling fluid chemical osmotic pressure difference testing arrangement
CN203929685U (en) A kind of high pressure nuclear magnetic resonance CO2 geological storage model test apparatus
CN208224038U (en) A kind of experimental provision for surveying permeability during the rock failure mechanism of rock in real time with constant flow
CN111521543A (en) Static pressurization visualization imbibition experimental method for tight reservoir cores
CN104897551B (en) A high-temperature and high-pressure thermal fluid seepage simulation device
CN115078222B (en) An imbibition physical simulation experimental device and method considering seam end pressure difference
CN110967364A (en) Combined water injection huff and puff experimental device and method for nuclear magnetic resonance
CN110529107A (en) Coal seam strain, seepage flow, displacement and jet stream integrated experiment device and method
CN211777357U (en) Multi-section pressure measurement water-air alternate oil extraction experimental device for CT scanning
CN112630121B (en) Device and method for testing permeability of fractured surrounding rock of deep chamber under stress action

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant