CN111879649A - Temporary plugging agent performance determination device and method - Google Patents
Temporary plugging agent performance determination device and method Download PDFInfo
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- CN111879649A CN111879649A CN202010140885.0A CN202010140885A CN111879649A CN 111879649 A CN111879649 A CN 111879649A CN 202010140885 A CN202010140885 A CN 202010140885A CN 111879649 A CN111879649 A CN 111879649A
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- 238000004088 simulation Methods 0.000 claims abstract description 224
- 230000000903 blocking effect Effects 0.000 claims abstract description 24
- 238000005259 measurement Methods 0.000 claims abstract description 19
- 239000003795 chemical substances by application Substances 0.000 claims description 133
- 239000012530 fluid Substances 0.000 claims description 74
- 238000012544 monitoring process Methods 0.000 claims description 12
- 239000002981 blocking agent Substances 0.000 claims description 10
- 230000002596 correlated effect Effects 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 3
- 230000001052 transient effect Effects 0.000 claims 9
- 238000004891 communication Methods 0.000 claims 1
- 238000005516 engineering process Methods 0.000 abstract description 10
- 230000000694 effects Effects 0.000 abstract description 6
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- 239000007788 liquid Substances 0.000 description 22
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- 238000010586 diagram Methods 0.000 description 4
- 238000011156 evaluation Methods 0.000 description 4
- 229910000856 hastalloy Inorganic materials 0.000 description 4
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- 238000006073 displacement reaction Methods 0.000 description 3
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- 239000003129 oil well Substances 0.000 description 3
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 238000009530 blood pressure measurement Methods 0.000 description 2
- 239000012267 brine Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 239000012065 filter cake Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
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- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
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- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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Abstract
The application discloses a device and a method for determining the performance of a temporary plugging agent, and belongs to the technical field of detection. The device includes: the feeding assembly is connected with the crack simulation assembly, a cavity extending along a specified direction is arranged in each crack simulation part, and the width of each cavity in the direction perpendicular to the specified direction is not all the same; the volume of the cavity of the main simulation part is larger than that of the cavity of the secondary simulation part; one end of the cavity in the main simulation part is connected with the feeding assembly, the other end of the cavity in the main simulation part is connected with the measuring assembly, a through hole is formed in the widest position of the cavity of the main simulation part, a blocking piece is arranged at the position of the through hole, the through hole is connected with one end of the cavity of the secondary simulation part, and the other end of the cavity of the secondary simulation part is connected with the measuring assembly; the measuring assembly comprises at least two containers and a weight measurer; the data acquisition assembly is connected with the measurement assembly. The problem that the performance of the temporary plugging agent is not completely evaluated in the related technology is solved, and the effect of more comprehensively evaluating the performance of the temporary plugging agent is achieved.
Description
Technical Field
The application relates to the technical field of detection, in particular to a device and a method for determining the performance of a temporary plugging agent.
Background
At present, the oil well can use a temporary plugging diversion fracture network fracturing technology to improve the yield in the process of exploitation, the temporary plugging diversion fracture network fracturing technology is characterized in that a temporary plugging agent and a fracturing fluid are delivered into a well section once or for multiple times, the fracturing fluid and the temporary plugging agent firstly enter an existing crack or a high-permeability zone, the temporary plugging agent forms a filter cake bridge plugging at a crack inlet or the high-permeability zone, the fracturing fluid and the temporary plugging agent are continuously injected into the well, when the pressure in the well is higher than the pressure in the existing crack, the follow-up fracturing fluid and the temporary plugging agent cannot enter the crack and the high-permeability zone under the blocking of the filter cake bridge plugging, the follow-up fracturing fluid and the temporary plugging agent are diverted to promote the opening of a new crack, the volume of the reconstruction in the well rises along with the increase of the crack in the well, and the yield is increased.
A temporary plugging agent performance determination device in the correlation technique comprises an acid tank, a water tank, a pump, a core holder, a Hastelloy cylinder, a back pressure valve and a differential pressure measurement device, wherein the acid tank and the water tank are respectively connected with an inlet of the core holder through a pipeline via the pump, the back pressure valve is arranged on a pipeline connected with an outlet of the core holder, the Hastelloy cylinder is positioned close to an inlet side of the core holder, the bottom end face of the Hastelloy cylinder is in contact with the top end face of a core column placed in the core holder, and the differential pressure measurement device is connected with the inlet and the outlet of the core holder. Adding a temporary plugging diverter into the hastelloy cylinder, injecting acid liquor into an acid tank, injecting brine into a water tank, adjusting the temperature of the device to the simulated stratum, heating, applying confining pressure to the core holder, introducing the brine into the core holder, and displacing with the acid liquor.
In the process of implementing the present application, the inventors found that the above related art has at least the following problems: in the device, the plugging performance of the temporary plugging agent is judged mainly through the difference value of the displacement pressure difference, and the performance evaluation of the temporary plugging agent is not comprehensive.
Disclosure of Invention
In order to solve the problem that the performance evaluation of the temporary plugging agent is incomplete in the related art, the embodiment of the application provides a device and a method for determining the performance of the temporary plugging agent. The technical scheme is as follows:
according to a first aspect of the present application, there is provided a temporary plugging agent performance determination apparatus, the apparatus including:
the device comprises a feeding assembly, a crack simulation assembly, a measurement assembly and a data acquisition assembly;
the feed assembly is connected with the fracture simulation assembly and is configured to input a temporary plugging agent and fracturing fluid into the fracture simulation assembly;
the fracture simulation assembly comprises at least two connected fracture simulation parts, each fracture simulation part is internally provided with a chamber extending along a designated direction, and the width of each chamber in the direction perpendicular to the designated direction is not all the same;
the at least two crack simulation parts comprise a main simulation part and at least one secondary simulation part, and the volume of the cavity of the main simulation part is larger than that of the cavity of the secondary simulation part;
one end of a cavity in the main simulation part is connected with the feeding assembly, the other end of the cavity in the main simulation part is connected with the measuring assembly, a through hole is formed in the widest position of the cavity of the main simulation part, a blocking piece is arranged at the position of the through hole, the through hole is connected with one end of a cavity of the secondary simulation part, and the other end of the cavity of the secondary simulation part is connected with the measuring assembly;
the inner wall of the cavity of each crack simulation part of the at least two crack simulation parts is provided with a gasket;
the measuring assembly comprises at least two containers and a weight measurer for measuring the weight of the substances in the at least two containers, and the at least two containers are connected with the other ends of the chambers in the at least two crack simulation parts in a one-to-one correspondence manner;
the data acquisition assembly is connected with the measurement assembly.
Optionally, the fracture simulation assembly further includes a shaft simulation pipe, a side wall of the shaft simulation pipe has a liquid outlet hole, the liquid outlet hole is connected with one end of the main simulation part far away from the measurement assembly, and an opening of the shaft simulation pipe is connected with the feeding assembly.
Optionally, the at least two crack simulation portions further include a third crack simulation portion, the cavity of the secondary simulation portion has a through hole, one end of the cavity of the third crack simulation portion is connected with the through hole of the cavity of the secondary simulation portion, and the other end of the cavity of the third crack simulation portion is connected with the measurement component.
Optionally, the measuring assembly further includes at least two flowmeters, and the at least two flowmeters are installed at the other ends of the chambers in the at least two fracture simulation parts in a one-to-one correspondence manner.
Optionally, the chamber of the main simulation part includes two conical chambers, and a bottom surface of a first conical chamber and a bottom surface of a second conical chamber of the two conical chambers are both open and communicated.
Optionally, the cavity of the secondary simulation part comprises a conical cavity, and the bottom surface of the conical cavity is open and is communicated with the through hole in the cavity of the primary simulation part.
Optionally, the shim comprises a plurality of shims of different thicknesses.
Optionally, the feed assembly includes a mixer and a fluid feed pump, one end of the mixer is connected to the fluid feed pump, and the other end of the mixer is connected to the wellbore simulation pipeline, and the mixer is configured to mix a preset dosage of the plugging agent and the fracturing fluid.
Optionally, the measurement assembly further includes a pressure monitoring meter, the pressure monitoring meter is connected to the wellbore simulation pipeline and configured to measure pressure in the wellbore simulation pipeline, and the other end of the pressure monitoring meter is connected to the data acquisition assembly.
According to a second aspect of the present invention, there is provided a temporary plugging agent performance determination method for the temporary plugging agent performance determination apparatus of the first aspect, the method comprising:
inputting a temporary plugging agent and fracturing fluid into the crack simulation assembly through the feeding assembly;
measuring the number of fracture simulation parts of the temporary plugging agent and the fracturing fluid discharged from the fracture simulation assembly in unit time and the weight data of the temporary plugging agent and the fracturing fluid discharged by a measuring assembly;
storing the number and the weight data of the temporary plugging agent and the fracturing fluid discharged by the fracture simulation assembly in unit time through a data acquisition assembly;
and determining the steering performance and the plugging performance of the temporary plugging agent according to the number and the weight data of the temporary plugging agent and the fracturing fluid discharged by the fracture simulation assembly in unit time, wherein the steering performance is positively correlated with the number, and the plugging performance is negatively correlated with the weight data.
The technical scheme provided by the embodiment of the application can have the following beneficial effects:
providing a temporary plugging agent performance determination device comprising a feeding assembly, a crack simulation assembly, a measurement assembly and a data acquisition assembly, wherein the feeding assembly inputs a temporary plugging agent and fracturing fluid into a cavity of a main simulation part in the crack simulation assembly, and part of the temporary plugging agent and the fracturing fluid in the cavity break through a blocking piece at a through hole at the widest part under certain pressure and enter a secondary simulation part; and the other part of the temporary plugging agent and the fracturing fluid flow out along the chamber to a container connected with one end of the chamber. The gasket can change the thickness of the cavity of the crack simulation part; the data acquisition assembly is connected with the weight measurer, the blocking performance of the temporary blocking agent can be determined by acquiring the weight of liquid in the container, and the steering performance of the temporary blocking agent can be judged by judging whether the blocking piece at the through hole is broken and the weight of the liquid in the container connected with the secondary simulation part. The problem that the performance of the temporary plugging agent is not completely evaluated in the related technology is solved, and the effect of more comprehensively evaluating the performance of the temporary plugging agent is achieved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.
Fig. 1 is a schematic structural diagram of a temporary plugging agent performance determination apparatus provided in an embodiment of the present application;
fig. 2 is a schematic structural diagram of another temporary plugging agent performance determination apparatus provided in an embodiment of the present application;
fig. 3 is a sectional view at the main simulation portion a in the temporary plugging agent performance determination apparatus shown in fig. 2;
fig. 4 is a flowchart of a method for determining a performance of a temporary plugging agent according to an embodiment of the present application.
With the above figures, there are shown specific embodiments of the present application, which will be described in more detail below. These drawings and written description are not intended to limit the scope of the inventive concepts in any manner, but rather to illustrate the inventive concepts to those skilled in the art by reference to specific embodiments.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
The development difficulty of part of oil wells in the middle and later periods of exploitation is gradually increased, and the temporary plugging steering fracture network fracturing technology is a novel technology which can increase the transformation volume of each section in a well by increasing the cracks in the well, so that the yield of the oil well is increased. In the process of researching the technology, the performance of the temporary plugging agent is mainly researched, and the research comprises the research of the temporary plugging agent, the performance evaluation of the temporary plugging material, the pressure bearing and plugging capability and the like.
In the steering performance determination device for the temporary plugging agent in the related art, the temporary plugging performance of the temporary plugging steering agent is evaluated according to the highest displacement differential pressure and the duration time of the displacement differential pressure. However, the above-mentioned related-art device is not comprehensive in evaluating the performance of the temporary plugging agent.
The embodiment of the application provides a device and a method for determining the performance of a temporary plugging agent, which can solve the problems in the related art.
Fig. 1 is a schematic structural diagram of a temporary plugging agent performance determination apparatus provided in an embodiment of the present application, where the apparatus includes:
feed assembly 11, crack simulation assembly 12, measurement assembly 13 and data acquisition assembly 14.
The feed assembly 11 is connected to the fracture simulation assembly 12 and is configured to input the diverting agent and the fracturing fluid to the fracture simulation assembly 12.
The fracture simulation assembly 12 includes at least two fracture simulation sections connected together, each having a chamber therein extending in a given direction, the chambers not all having the same width in a direction perpendicular to the given direction.
The at least two fracture simulation parts include a primary simulation part 121 and at least one secondary simulation part 122, and a volume of the chamber 1211 of the primary simulation part 121 is greater than a volume of the chamber 1221 of the secondary simulation part 122.
One end of the cavity 1211 in the main simulation part 121 is connected to the feeding assembly 11, the other end is connected to the measuring assembly 13, the cavity 1211 of the main simulation part 121 has a through hole 1212 at the widest position, the through hole 1212 has a baffle 15, the through hole 1212 is connected to one end of the cavity 1221 of the secondary simulation part 122, and the other end of the cavity 1221 of the secondary simulation part 122 is connected to the measuring assembly 13.
The inner wall of the chamber of each of the at least two fracture simulation sections is provided with a gasket 16.
The measuring assembly 13 includes at least two containers 131 and a weight measurer 132 for measuring the weight of the substance in the at least two containers, and the at least two containers 131 are connected to the other ends of the chambers 1211, 1221 in the at least two crack simulation sections in a one-to-one correspondence.
The data acquisition assembly 14 is connected to the measurement assembly 13.
In summary, the embodiment of the present application provides a temporary plugging agent performance determination apparatus including a feeding assembly, a crack simulation assembly, a measurement assembly, and a data acquisition assembly, wherein the feeding assembly inputs a temporary plugging agent and a fracturing fluid into a cavity of a main simulation portion in the crack simulation assembly, and a part of the temporary plugging agent and the fracturing fluid in the cavity break through a barrier at a through hole at a widest position under a certain pressure and enter a secondary simulation portion; and the other part of the temporary plugging agent and the fracturing fluid flow out along the chamber to a container connected with one end of the chamber. The gasket can change the thickness of the cavity of the crack simulation part; the data acquisition assembly is connected with the weight measurer, the blocking performance of the temporary blocking agent can be determined by acquiring the weight of liquid in the container, and the steering performance of the temporary blocking agent can be judged by judging whether the blocking piece at the through hole is broken and the weight of the liquid in the container connected with the secondary simulation part. The problem that the performance of the temporary plugging agent is not completely evaluated in the related technology is solved, and the effect of more comprehensively evaluating the performance of the temporary plugging agent is achieved.
Referring to fig. 2, a schematic structural diagram of another temporary plugging agent performance determination apparatus provided in the embodiment of the present application is shown:
optionally, the at least two fracture simulating sections further include a third fracture simulating section 123, the chamber 1221 of the secondary simulating section has a through hole 1222, and one end of the chamber 1231 of the third fracture simulating section 123 is connected to the through hole 1222 of the chamber 1221 of the secondary simulating section, and the other end is connected to the measuring component. The volume of the third fracture simulation part 123 is smaller than that of the secondary simulation part 122, and the through hole 1222 of the secondary simulation part 122 also includes a baffle plate, so that the temporary plugging agent and the fracturing fluid can enter the third fracture simulation part 123 by breaking the baffle plate after entering the chamber 1221 of the secondary simulation part. At least two crack simulation departments in the stifled agent performance determination device of temporary plugging combine together, can simulate the crack condition in the actual well, because the well crack is comparatively complicated, consequently, the quantity of crack simulation department can be a plurality ofly, and because the main crack of temporary plugging agent in the well is stifled the back, turn to under the effect of pressure, break new crack, this cracked scale is less than main crack usually, consequently, the volume of the time simulation department in this application is less than main simulation department, the volume of third crack simulation department 123 is less than time simulation department, analogize with this, when this application includes fourth crack simulation department, the cavity of third crack simulation department 123 has the through-hole, have the separation blade in the through-hole, the one end of the cavity of fourth crack simulation department is connected with this through-hole, the other end is connected with measuring component. And the volume of the fourth fracture simulation section is smaller than that of the third fracture simulation section 123. In the embodiment of the application, each secondary simulation part is vertically connected with the previous simulation part, and the width of each secondary simulation part is 1-3 mm smaller than that of the previous simulation part.
The separation blade sets up in through-hole department, blocks as time simulation portion entrance, breaks the separation blade when temporary plugging agent and fracturing fluid and gets into time simulation portion, can regard this temporary plugging agent to turn to successfully, also indicates that this temporary plugging agent turns to the ability better. In the embodiment of the application, the separation blade is made of copper, the separation blade is set to be a circular sheet with the same diameter as the through hole, and the separation blade is clamped at the through hole. The blocking pieces can be set to different thicknesses, and exemplarily, the blocking pieces are set to be 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm and 0.7mm in thickness, when the blocking pieces with different thicknesses are placed at the through hole for testing, different explosion values of the temporary plugging agent, such as 2MPa, 6.5MPa, 10.5MPa, 16MPa, 20MPa, 25MPa and 30MPa, can be obtained, and whether the temporary plugging agent can successfully turn under different pressures can be determined. Illustratively, when the preset pressure is 10.5MPa, the blocking piece at the through hole connecting each crack simulating section with the next-stage crack simulating section is replaced by a blocking piece with a thickness of 0.3mm, and if the temporary plugging agent breaks through the blocking piece, the temporary plugging agent can be diverted under the pressure of 10.5 MPa. The through hole that each crack simulation portion links to each other with next level crack simulation portion all is provided with the separation blade, can require the separation blade of changing different thickness according to the experiment to obtain more comprehensive testing result. Thereby achieving more comprehensive evaluation on the performance of the temporary plugging agent.
Optionally, the fracture simulation assembly further includes a wellbore simulation pipe 124, a sidewall of the wellbore simulation pipe 124 has a liquid outlet 1241, the liquid outlet 1241 is connected to an end of the main simulation part 121 far away from the measurement assembly, and an opening of the wellbore simulation pipe 124 is connected to the feeding assembly. The wellbore simulation tubing 124 is a component that can simulate the tubing in an actual well, and the wellbore simulation tubing 124 can be either horizontally or vertically disposed. The feeding assembly inputs the mixed temporary plugging agent and fracturing fluid into the opening of the shaft simulation pipeline 124, and the temporary plugging agent and the fracturing fluid enter the shaft simulation pipeline 124 and then enter the main simulation part 121 through the liquid outlet 1241. Wherein the main simulation 121 and the wellbore simulation tubing 124 may be vertically connected. The diameter of the liquid outlet 1241 is related to the volume of the shaft simulation pipeline 124, the total amount of the temporary plugging agent and the fracturing fluid in the chamber 1211 of the main simulation part 121 and the mixer, and the diameter of the liquid outlet can be set according to the specifications of the components, in the embodiment of the present application, the diameter of the liquid outlet 1241 is 10-15 mm.
Optionally, the measurement assembly further includes at least two flow meters 133, and the at least two flow meters 133 are installed at the other ends of the chambers in the at least two fracture simulation parts in a one-to-one correspondence manner. The flow meter can detect the flow rate of the temporary plugging agent and the fracturing fluid flowing out of the fracture simulation part, and can also be connected with the data acquisition assembly 14 to record the measured flow rate at the outlet of each fracture simulation part. The other end of cavity all can set up a flowmeter in each crack analog portion, and the one end that liquid entry was kept away from to cavity in every flowmeter one end and the crack analog portion is connected, and the other end is connected with container 131, and the flowmeter is passed through earlier when temporary plugging agent and fracturing fluid flow out from the crack analog portion, measures the velocity of flow of temporary plugging agent and fracturing fluid, reentrant container 131, measures the weight of the temporary plugging agent and the fracturing fluid that flow out through the weight caliber 132 that is connected with container 131. At this time, the data acquisition assembly 14 records the data of each flow meter 133 and the weight measurer 132, so as to determine the plugging capability of the temporary plugging agent under different particle sizes and different concentrations. The model of the flowmeter can refer to the related art, and the embodiment of the invention is not limited herein.
Optionally, the cavity 1211 of the main simulation part 121 includes two conical cavities, and a bottom surface of a first conical cavity of the two conical cavities is open and communicated with a bottom surface of a second conical cavity. One end of the chamber 1211 of the main simulation part 121 is connected to the outlet 1241 of the wellbore simulation conduit 124 to better simulate the actual conditions in the well, and the volume of the main simulation part is larger, so the chamber 1211 of the main simulation part may include two parts, wherein the tip end of the first conical chamber is connected to the outlet 1241, the bottom surface is communicated with the bottom surface of the second conical chamber, and the tip end of the second conical chamber is connected to the measuring assembly to serve as an outlet for the temporary plugging agent and the fracturing fluid. In addition, the bottom surfaces of the first and second conical chambers are the widest points of the chamber 1211 of the main simulation part 121, and therefore, a through hole communicating with the sub simulation part 122 is formed on the side wall of the connection point. When the temporary plugging agent property determination apparatus does not include the wellbore simulation tubing 124, the tip end of the first conical chamber is directly connected to the feed assembly.
Optionally, the cavity 1221 of the secondary simulation part 122 includes a conical cavity, and a bottom surface of the conical cavity is open and is communicated with the through hole in the cavity 1211 of the primary simulation part 121. Because the volume of the secondary simulation part 122 is small, and the liquid inlet of the cavity of the secondary simulation part 122 is the through hole provided with the baffle, the cavity 1221 of the secondary simulation part 122 can be provided with a conical cavity, the wider end of the conical cavity is connected with the through hole, and the sharp-end of the conical cavity is connected with the measuring component. When the temporary plugging agent is used for a crack broken in a stratum in a well, the width of the broken part of the crack is usually the widest, and the width of the crack is more and more narrow in the direction of keeping away from the extension of the broken part, so that the practical situation of the crack is simulated, the cavity of the crack simulation part is set to be a conical cavity, one end close to the through hole is the end of the broken part of the crack in the simulated well, the width is the widest, and the end far away from the through hole is the end far away from the broken part in the extension direction of the simulated crack, so that the width is narrower. The chamber is set to be a conical chamber, so that the performance of the temporary plugging agent can be more accurately evaluated.
In addition, a core stone with the same volume as the outlet end of the chamber can be further arranged at one end of each conical chamber connected with the flow assembly, the core stone is sourced from the stratum of an actual construction site, the core stone is placed into the chamber, the condition in an actual well can be better simulated, the blocking capacity of the temporary plugging agent and the fracturing fluid on the core stone can also be better simulated, and therefore the blocking capacity of the temporary plugging agent and the fracturing fluid in the actual well is judged. The specific volume and material of the core rock are not limited in this embodiment.
Optionally, the inner wall of the chamber of each of the at least two fracture simulating sections is provided with a gasket 16. Can set up the gasket of a plurality of different thickness, the gasket of different thickness is placed in the cavity of crack simulation portion, can change the thickness of the cavity of crack simulation portion to change the experimental condition, the condition in the simulation well that can be more accurate. The thickness of the gasket 16 is set to be smaller than that of the cavity of the crack simulating section, for example, the thickness of the cavity of the crack simulating section is 6mm, and the gasket with the thickness of 2mm is put into the inner wall of the cavity of the crack simulating section in a certain experiment, and the thickness of the cavity of the crack simulating section is 4mm in the experiment. In the embodiment of the present invention, the thickness of each gasket is 1mm to 10mm, and the number and the thickness of the gaskets are not limited herein. The gasket 16 may be a rubber gasket, which may be repeatedly used for many times, or a gasket made of other materials may be used, and the embodiment of the present invention is not limited herein. Fig. 3 is a cross-sectional view of the temporary plugging agent property determination apparatus shown in fig. 2 at the main simulation portion a, in which a gasket 16 is provided in a cavity of the cavity 1211 of the main simulation portion 121, reducing the thickness of the cavity 1211.
Optionally, the feed assembly comprises a mixer 111 and a feed pump 112, wherein one end of the mixer 111 is connected to the feed pump 112, and the other end is connected to the wellbore simulation pipeline 124, and the mixer 111 is configured to mix a preset amount of the plugging agent and the fracturing fluid. A stirrer can be arranged in the mixer 111, after the temporary plugging agent and the fracturing fluid with preset proportioning are injected into the mixer 111, the temporary plugging agent and the fracturing fluid are stirred to be pasty by the stirrer in the mixer 111, the fluid feed pump 112 is started, the fluid feed pump 112 pushes the mixer 111 to push the temporary plugging agent and the fracturing fluid mixed in the mixer 111 out to the shaft simulation pipeline 124. The liquid supply pump 112 is arranged at one end of the mixer 111 far away from the shaft simulation pipeline 124, so that the temporary plugging agent can be prevented from remaining and blocking the liquid supply pump 112 when passing through the liquid supply pump 112. The mixer 111 is connected to an opening of the wellbore simulation tubing 124 by a fluid line, which may be threaded to the wellbore simulation tubing 124.
Optionally, the measurement assembly further comprises a pressure monitoring gauge 134, the pressure monitoring gauge 134 is connected to the wellbore simulation tubing 124 and configured to measure the pressure in the wellbore simulation tubing 124, and the other end of the pressure monitoring gauge 134 is connected to the data acquisition assembly 14. In actual job site, all be provided with the pressure monitoring table that can real-time monitoring pressure conditions in the well, in this application embodiment, for more accurate simulation well situation, consequently also be provided with pressure monitoring table 134 on pit shaft simulation pipeline 124, this pressure monitoring table 134 can real-time supervision pit shaft simulation pipeline 124 in the pressure and carry out the record. The operator can judge whether the actual pressure in the shaft simulation pipeline 124 is different from the preset pressure or not in real time, and the pressure of the temporary plugging agent and the fracturing fluid in the shaft simulation pipeline 124 can be compared with the pressure of the copper sheets broken by the temporary plugging agent and the fracturing fluid. And thus as one of the data for judging the performance of the temporary plugging agent.
In summary, the embodiment of the present application provides a temporary plugging agent performance determination apparatus including a feeding assembly, a crack simulation assembly, a measurement assembly, and a data acquisition assembly, wherein the feeding assembly inputs a temporary plugging agent and a fracturing fluid into a cavity of a main simulation portion in the crack simulation assembly, and a part of the temporary plugging agent and the fracturing fluid in the cavity break through a barrier at a through hole at a widest position under a certain pressure and enter a secondary simulation portion; and the other part of the temporary plugging agent and the fracturing fluid flow out along the chamber to a container connected with one end of the chamber. The gasket can change the thickness of the cavity of the crack simulation part; the data acquisition assembly is connected with the weight measurer, the blocking performance of the temporary blocking agent can be determined by acquiring the weight of liquid in the container, and the steering performance of the temporary blocking agent can be judged by judging whether the blocking piece at the through hole is broken and the weight of the liquid in the container connected with the secondary simulation part. The problem that the performance of the temporary plugging agent is not completely evaluated in the related technology is solved, and the effect of more comprehensively evaluating the performance of the temporary plugging agent is achieved.
Fig. 4 is a flowchart of a temporary plugging agent performance determination method provided in an embodiment of the present application, for use in the temporary plugging agent performance determination apparatus of fig. 1 and 2, the method including:
In the embodiment of the application, the temporary plugging agent with the concentration of 20-60 meshes and 8% and the fracturing fluid (slickwater) are stirred and mixed in a mixer, and the mixture is injected into a shaft simulation pipeline by a liquid supply pump according to the flow rate of 40ml/min (milliliters per minute).
And 402, measuring the number of the fracture simulation parts of the temporary plugging agent and the fracturing fluid discharged from the fracture simulation assembly in unit time and the weight data of the discharged temporary plugging agent and the fracturing fluid by using the measuring assembly.
The temporary plugging agent and the fracturing fluid enter a cavity of the main simulation part through a shaft simulation pipeline, part of the temporary plugging agent and the fracturing fluid break through a blocking piece on a through hole of the main simulation part and enter the cavity of the secondary simulation part, the rest of the temporary plugging agent and the fracturing fluid flow out of the other end of the cavity into a container of the measuring assembly, and weight data of the temporary plugging agent and the fracturing fluid discharged from a cavity of the main simulation part in unit time are measured through a weight measurer below the container. The temporary plugging agent and the fracturing fluid break through the separation blade and then enter the secondary simulation part, and flow out of a chamber of the secondary simulation part to the measuring assembly.
And 403, storing the number and the weight data of the temporary plugging agent and the fracturing fluid discharged by the fracture simulation assembly in unit time through the data acquisition assembly.
The data acquisition assembly is connected with the measuring assembly, records and stores the measured data of the main simulation part and the secondary simulation part in unit time measured by the measuring assembly, and records the number of the weight measuring devices of the measured data in a plurality of weight measuring devices in the plurality of measuring assemblies.
And step 404, determining the steering performance and the plugging performance of the temporary plugging agent according to the weight data of the temporary plugging agent and the fracturing fluid discharged by the fracture simulation assembly in unit time of the number and the weight data, wherein the steering performance is positively correlated with the number, and the plugging performance is negatively correlated with the weight data.
When the weight data measured by one measuring assembly is larger, the temporary plugging agent and the fracturing fluid discharged by the simulation part are more, namely the plugging capability of the temporary plugging agent is poorer; when the weight data measured by one measuring component is smaller, the temporary plugging agent and the fracturing fluid discharged by the simulation part are less, and the plugging capability of the temporary plugging agent is better. In addition, when the temporary plugging agent and the fracturing fluid which enter the main simulation part break through the separation blade and enter the secondary simulation part, namely the weight measuring devices connected with the secondary simulation part can detect relevant data, the more the number of the weight measuring devices which can detect the data is, the more the number of the temporary plugging agent and the fracturing fluid which break through the separation blade and enter the secondary simulation part is, the better the steering performance of the temporary plugging agent is.
In summary, the embodiment of the present application provides a method for determining performance of a temporary plugging agent, wherein a feeding assembly inputs the temporary plugging agent and a fracturing fluid into a cavity of a main simulation part in a crack simulation assembly, and a part of the temporary plugging agent and the fracturing fluid in the cavity break through a blocking piece at a through hole at a widest position under a certain pressure and enter a sub simulation part; and the other part of the temporary plugging agent and the fracturing fluid flow out along the chamber to a container connected with one end of the chamber. The gasket can change the thickness of the cavity of the crack simulation part; the data acquisition assembly is connected with the weight measurer, the blocking performance of the temporary blocking agent can be determined by acquiring the weight of liquid in the container, and the steering performance of the temporary blocking agent can be judged by judging whether the blocking piece at the through hole is broken and the weight of the liquid in the container connected with the secondary simulation part. The problem that the performance of the temporary plugging agent is not completely evaluated in the related technology is solved, and the effect of more comprehensively evaluating the performance of the temporary plugging agent is achieved.
The above description is intended to be exemplary only, and not to limit the present application, and any modifications, equivalents, improvements, etc. made within the spirit and scope of the present application are intended to be included therein.
Claims (10)
1. A temporary plugging agent property determination apparatus, characterized in that the apparatus comprises:
the device comprises a feeding assembly, a crack simulation assembly, a measurement assembly and a data acquisition assembly;
the feed assembly is connected with the fracture simulation assembly and is configured to input a temporary plugging agent and fracturing fluid into the fracture simulation assembly;
the fracture simulation assembly comprises at least two connected fracture simulation parts, each fracture simulation part is internally provided with a chamber extending along a designated direction, and the width of each chamber in the direction perpendicular to the designated direction is not all the same;
the at least two crack simulation parts comprise a main simulation part and at least one secondary simulation part, and the volume of the cavity of the main simulation part is larger than that of the cavity of the secondary simulation part;
one end of a cavity in the main simulation part is connected with the feeding assembly, the other end of the cavity in the main simulation part is connected with the measuring assembly, a through hole is formed in the widest position of the cavity of the main simulation part, a blocking piece is arranged at the position of the through hole, the through hole is connected with one end of a cavity of the secondary simulation part, and the other end of the cavity of the secondary simulation part is connected with the measuring assembly;
the inner wall of the cavity of each crack simulation part of the at least two crack simulation parts is provided with a gasket;
the measuring assembly comprises at least two containers and a weight measurer for measuring the weight of the substances in the at least two containers, and the at least two containers are connected with the other ends of the chambers in the at least two crack simulation parts in a one-to-one correspondence manner;
the data acquisition assembly is connected with the measurement assembly.
2. The transient plugging agent performance determination device of claim 1, wherein said fracture simulation module further comprises a wellbore simulation conduit, a sidewall of said wellbore simulation conduit having a fluid outlet hole, said fluid outlet hole being connected to an end of said main simulation portion remote from said measurement module, an opening of said wellbore simulation conduit being connected to said feed module.
3. The transient plugging agent performance determination device of claim 1, wherein said at least two fracture simulation portions further comprise a third fracture simulation portion, the chamber of said secondary simulation portion has a through hole, one end of the chamber of said third fracture simulation portion is connected with the through hole of the chamber of said secondary simulation portion, and the other end is connected with said measurement component.
4. The transient plugging agent performance determination device of claim 1, wherein said measuring assembly further comprises at least two flow meters, said at least two flow meters being mounted one-to-one at the other ends of the chambers in said at least two fracture simulating sections.
5. The transient blocking agent performance determining device of claim 1, wherein the chamber of the main simulation portion comprises two conical chambers, and a bottom surface of a first conical chamber and a bottom surface of a second conical chamber of the two conical chambers are both open and in communication.
6. The transient plugging agent performance determination device of claim 1, wherein the chamber of said secondary simulation portion comprises a conical chamber, the bottom surface of said conical chamber being open and communicating with the through hole in the chamber of said primary simulation portion.
7. The transient blocking agent performance determining device of claim 1, wherein said gasket comprises a plurality of gaskets of different thicknesses.
8. The transient plugging agent performance determination device of claim 2, wherein said feed assembly comprises a mixer and a fluid feed pump, said mixer being connected to said fluid feed pump at one end and to said wellbore simulation tubing at the other end, said mixer being configured to mix a predetermined amount of transient plugging agent and fracturing fluid.
9. The transient plugging agent performance determination device of claim 2, wherein said measurement assembly further comprises a pressure monitoring gauge connected to said wellbore simulation conduit and configured to measure pressure within said wellbore simulation conduit, said pressure monitoring gauge being connected at another end to said data acquisition assembly.
10. A method for determining a performance of a temporary plugging agent, which is used in the temporary plugging agent performance determining apparatus according to any one of claims 1 to 9, the method comprising:
inputting a temporary plugging agent and fracturing fluid into the crack simulation assembly through the feeding assembly;
measuring the number of fracture simulation parts of the temporary plugging agent and the fracturing fluid discharged from the fracture simulation assembly in unit time and the weight data of the temporary plugging agent and the fracturing fluid discharged by a measuring assembly;
storing the number and the weight data of the temporary plugging agent and the fracturing fluid discharged by the fracture simulation assembly in unit time through a data acquisition assembly;
and determining the steering performance and the plugging performance of the temporary plugging agent according to the number and the weight data of the temporary plugging agent and the fracturing fluid discharged by the fracture simulation assembly in unit time, wherein the steering performance is positively correlated with the number, and the plugging performance is negatively correlated with the weight data.
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