CN107576604A - A kind of gas hydrates rock core flow velocity sensitivity measurement system - Google Patents
A kind of gas hydrates rock core flow velocity sensitivity measurement system Download PDFInfo
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- CN107576604A CN107576604A CN201710672413.8A CN201710672413A CN107576604A CN 107576604 A CN107576604 A CN 107576604A CN 201710672413 A CN201710672413 A CN 201710672413A CN 107576604 A CN107576604 A CN 107576604A
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- rock core
- holding unit
- core
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- flow velocity
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Abstract
The invention discloses gas hydrates rock core flow velocity sensitivity measurement system, including：Core holding unit；Injection pump；Electronic scale；Pressure sensor；Data acquisition module.Its each several part is connected by pipeline.The displacing fluid displacement rock core of different pressures is injected by injection pump, data acquisition module records the data of pressure sensor and electronic scale, to determine the free-boundary problem of rock core and the quick critical pressure gradient of speed, correspond to reservoir for exploitation rock core and experimental data support is provided.
Description
Technical field
Surveyed the present invention relates to gas hydrates and adopt technical field, more particularly to a kind of gas hydrates rock core flow velocity is quick
Perceptual measurement system.
Background technology
Gas hydrates are also known as " combustible ice ", are distributed across in the permafrost of halmeic deposit or land-based area, by natural
The crystalline material for the class ice-like that gas is formed with water under the conditions of high pressure low temperature.Due to its Air-pollution From Combustion than coal, oil, natural gas all
It is much smaller, and rich reserves, the global enough mankind of reserves use 1000, thus are considered as following petroleum gas by various countries
Alternative energy source.The runin that the states such as China, Japan, Canada have been carried out combustible ice is adopted, using the method for decompression exploitation.
It is a kind of recovery method for promoting gas hydrate dissociation by reducing pressure to be depressured extraction system.Decompression scheme
The experimental data for needing hydrate reservoir material object rock core is formulated as foundation.
Existing core test method is designed for the cementing rock core for having skeleton of conventional gas and oil, conventional core test
Method can not be used for testing the not cementing exoskeletal rock core of hydrate reservoir, can not obtain the basic parameter of hydrate reservoir, it is impossible to
The formulation that scheme is depressured for hydrate pilot production provides guidance.
The content of the invention
For overcome the deficiencies in the prior art, object of the present invention is to provide a kind of gas hydrates rock core flow velocity is quick
Perceptual measurement system, it, which can solve existing measure device, can not obtain hydrate reservoir basic parameter, it is impossible to be hydrate pilot production
The formulation of decompression scheme provides the problem of instructing.
The purpose of the present invention is realized using following technical scheme：
A kind of gas hydrates rock core flow velocity sensitivity measurement system, including：
Core holding unit, for the fixed rock core to be measured for being put into the core holding unit, the cylinder of the core holding unit
Inner surface is through laser grinding process；
Injection pump, it is connected by pipeline with the core holding unit fluid-infusing port, according to constant pressure displacement displacing fluid
Into the rock core to be measured being fixed in the core holding unit, the fluid of script in the rock core to be measured is gone out with displacement；
Electronic scale, it is connected by pipeline with the core holding unit flow export, flows through the rock core to be measured for measuring
The quality of the displacing fluid；
Pressure sensor, it is connected by pipeline with the core holding unit, injects the core holding unit note for measuring
The displacement pressure difference of displacing fluid of the entrance with flowing out the core holding unit flow export；
Data acquisition module, communicated to connect with the pressure sensor, the electronic scale, for obtaining the pressure sensing
Device, the electronic scale measurement data.
Preferably, the electronic scale is located in same level with the core holding unit.Raising measure system can be reached
The effect of unified test accuracy of measurement.
Preferably, in addition to water pipe column, the water pipe column and the injection parallel connection of pumps, water pipe column branch road, injection
The first valve and the second valve that the corresponding bypass line of control opens and closes are respectively equipped with pump branch road.Water pipe column branch road by the first valve with
Core holding unit fluid-infusing port is connected, and injection pump branch road is connected by the second valve with core holding unit fluid-infusing port.Water pipe
The setting of column expands the use range of measurement system.
Preferably, the water pipe column is connected with the discharge branch road for controlling the water pipe column liquid level.Can
The liquid level of convenient water control pipe column.
Preferably, the discharge branch road quantity is 4, correspond to respectively the water pipe column correspond to 0.02Mpa, 0.04Mpa,
0.06Mpa, 0.08Mpa liquid level are set, and the discharge branch corresponding to control is correspondingly provided with 4 discharge branch roads
The switch valve that road opens and closes.Experimenter can be easy to be tested from different displacement pressures.
Preferably, the rock core to be measured is not cementing exoskeletal rock core.Solve it is existing measure device can not determine it is not cementing
The problem of exoskeletal rock core.
Preferably, the quantity of the pressure sensor is more than one, and more than one pressure sensor is arranged in parallel, and
And the range of one pressure sensor above is different.Reach the effect for improving experimental precision.
Compared with prior art, the beneficial effects of the present invention are the invention provides a kind of gas hydrates rock core stream
Fast sensitivity testing system, including：Core holding unit；Injection pump；Electronic scale；Pressure sensor；Data acquisition module.Its each portion
Divide and pass through pipeline connection.The displacing fluid displacement rock core of different pressures is injected by injection pump, data acquisition module record pressure passes
The data of sensor and electronic scale, to determine the free-boundary problem of rock core and the quick critical pressure gradient of speed, to develop rock core
Corresponding reservoir provides experimental data support.
Brief description of the drawings
Fig. 1 is the gas hydrates rock core flow velocity sensitivity measurement system disclosed in the embodiment of the present invention one；
Rock core in gas hydrates rock core flow velocity sensitivity measurement systems of the Fig. 2 disclosed in the embodiment of the present invention one
The structural representation of clamper.
In figure：1 it is water pipe column, 2 be injection pump, 3 be first row out branch, 4 be second row out branch, 5 is the 3rd row
Out branch, 6 be the 4th discharge branch road, 7 be the first valve, 8 be the second valve, 9 be first pressure sensor, 10 be second pressure sensing
Device, 11 be core holding unit, 1101 be core holding unit cylinder inner surface, 12 be electronic scale, 13 be data collecting system.
Embodiment
Below, with reference to accompanying drawing and embodiment, the present invention is described further：
Fig. 1, Fig. 2 are referred to, Fig. 1 is the gas hydrates rock core flow velocity sensitivity disclosed in the embodiment of the present invention one
Measurement system, Fig. 2 be the embodiment of the present invention one disclosed in gas hydrates rock core flow velocity sensitivity measurement system in rock
The structural representation of heart clamp holder.
The invention discloses a kind of gas hydrates rock core flow velocity sensitivity measurement system, including：Core holding unit 11,
For the fixed rock core to be measured for being put into core holding unit 11, the cylinder inner surface 1101 of core holding unit is through laser grinding process；
Injection pump 2 is connected by pipeline with the fluid-infusing port of core holding unit 11, is entered according to constant pressure displacement displacing fluid and is fixed on
11 rock core to be measured in core holding unit, the fluid of script in rock core to be measured is gone out with displacement；Electronic scale 12 passes through pipeline and rock core
The flow export of clamper 11 is connected, for measuring the quality for the displacing fluid for flowing through rock core to be measured；Pressure sensor, pass through pipeline and rock
Heart clamp holder 11 is connected, for measuring the drive of displacing fluid of the injection core holding unit inlet with flowing out core holding unit flow export
For pressure difference；Data acquisition module 13, communicated to connect with pressure sensor, electronic scale 12, for obtaining pressure sensor, electronic scale
12 measurement data.The not cementing exoskeletal rock core that gas hydrates rock core is in the present embodiment, corresponding core holding unit
11 cylinder inner surface 1101 passes through laser grinding process, increases its surface roughness.Non- cementing core sample is loaded with it
The influence of rock core and core holding unit internal face secondary interface can be eliminated in the case where not adding confined pressure to rock core, so as to
Reach experiment purpose.Injection pump 2 is constant pressure constant speed pump, and the drive of constant pressure and constant flow velocity is provided to the rock core into core holding unit 11
For liquid, the original fluid of displacement rock core.Core holding unit 11 used is symmetrical structure in the present embodiment, its optional any connection
Hold and be connected for inlet end with injection pump 2, the other end is that flow export end is connected with electronic scale 12.Pressure sensor range and injection
Pump 2 matches, the displacement pressure difference of the displacing fluid for measuring injection core holding unit 11, by real-time data transmission to data acquisition
Module 13.The weighing platform face of electronic scale 12 can be flowed through by pipeline by flowing through the displacing fluid of core holding unit 11, and electronic scale 12 will be certain
Measurement data in time is sent to data acquisition module 13, and for displacing fluid after selected, its density is, it is known that therefore can be by measured by
Qualitative data, be converted into data on flows.It will be appreciated by persons skilled in the art that electronic scale 12 is directly replaced with into flow
Meter, can also realize above-mentioned function.
In concrete operations, experimenter adds filter paper and rock baffle plate, flow export at the inlet end of core holding unit 11
End adds filter paper and rock baffle plate after adding hydrate reservoir material object rock core, and rock core length is 0.1m, installs fixed rock core clamping
Device 11, gas hydrates rock core flow velocity sensitivity measurement system is connected by above-mentioned annexation.Start injection pump 2, there is provided
The displacing fluid of one constant pressure and constant flow rate carries out displacement to the rock core in core holding unit 11, and the displacement time is 12 small
When, if the data of electronic scale 12 change, it was demonstrated that there is liquid to be flowed out from core holding unit, the record now offer of injection pump 2
Displacement pressure, the free-boundary problem of rock core is calculated.The pressure of displacing fluid is increased if the measurement data of electronic scale 12 is unchanged
Power, the free-boundary problem until finding out rock core.Need further to increase displacement hydraulic coupling, pressure after free-boundary problem is found
Increment can be certain value, such as 0.1Mpa.By recording 12 hours electronic scale data, fluid flow data, Ran Houtong are extrapolated
Cross data collecting system 13 and permeability is calculated according to fluid flow data, by the permeability and the permeability before adjustment pressure
Compare, if permeability value changes can provide more than 1mD according to injection pump after pressure increase obtained by the calculating after pressure increase
Displacement pressure the fast quick critical pressure gradient of rock core is calculated.It can be seen that can determine rock core by the system starts pressure ladder
The fast quick critical pressure gradient of degree and rock core, experimental data support is provided for reservoir corresponding to later stage exploitation rock core.
On the basis of above-described embodiment, injection pump 2 is also parallel with water pipe column 1, and the setting of water pipe column 1 expands this
The use range of measurement system, displacement pressure is extended into below 0.1MPa.Specifically by the bottom of water pipe column 1 by pipeline with
Injection pump 2 is in parallel, and water pipe column branch road is provided with the first valve 7, and injection pump branch road is provided with the second valve 8.Adjust in water pipe column 1
Liquid level, you can adjustment displacement pressure.By opening the first valve 7 when the displacement pressure of user's selection of small is tested,
The second valve 8 is closed to can be achieved.And it can realize that below 0.1Mpa pressure is adjusted by adjusting different liquid levels.
In the present embodiment, water pipe column 1 controls liquid level by discharging branch road, and discharge branch road quantity is 4, right respectively
Answer water pipe column 1 corresponding 0.02Mpa, 0.04Mpa, 0.06Mpa, 0.08Mpa liquid level to set, on 4 discharge branch roads
It is correspondingly provided with the switch valve that the corresponding discharge branch road of control opens and closes.It is first row out branch 3 that wherein 0.08Mpa, which corresponds to branch road,
It is second row out branch 4 that 0.06Mpa, which corresponds to branch road, and 0.04Mpa corresponds to branch road and corresponds to branch road for the 3rd discharge branch road 5,0.02Mpa
4th discharge branch road 6.Each corresponding branch road, which is provided with, controls the branch road open-close on-off valve, and user is by controlling opening for corresponding switch valve
Close and can obtain different displacement pressures.Displacing fluid constantly injects from the top of water pipe column 1, and experimenter opens water pipe column
Corresponding switch valve on a certain discharge branch road on 1, the liquid discharged more than branch road height will be along the discharge branch road stream
Go out, liquid level is stable in water pipe column 1 highly, the drive of a constant pressure is being provided for displacement test corresponding to the discharge branch road
For liquid.Such as displacement test needs 0.06Mpa displacing fluid, experimenter opens the switch valve on second row out branch 4, closes the
One discharge branch road the 3, the 3rd discharges the switch valve on the discharge branch road 6 of branch road the 5, the 4th, and the displacing fluid of the top of water pipe column 1 injection leads to
Cross second row out branch 4 to discharge, the displacing fluid in water pipe column 1 is maintained at the height corresponding to second row out branch 4, i.e., should
The corresponding height of 0.06Mpa.
On the basis of above-described embodiment, the quantity of pressure sensor is more than one, more than one pressure sensor
It is arranged in parallel, and the range of one pressure sensor above is different.Small-range high accuracy can specifically be divided into
Sensor and wide range coarse sensor, user pressure sensor can measure according to corresponding to being selected displacement pressure.
In the present embodiment, first pressure sensor 9 selects 0-6Mpa ranges, coordinates the 0.1-6Mpa of injection pump 2 work
Make scope to be used, second pressure sensor 10 is used from 0-0.6Mpa high-precision pressure sensor hydrous water tube column 1.
By opening and closing corresponding switch valve on each branch road during use, you can realization assembles.Pressure sensor flows through rock core folder for measure
The displacement pressure difference of the displacing fluid of holder 11 provides data to calculate the permeability of rock core.There is provided when injection pump 2 or water pipe column 1
When displacement pressure is less than the startup pressure of rock core, core holding unit flow export end is flowed out without displacing fluid, and now pressure sensor is surveyed
The data of amount are the displacement pressure that injection pump 2 or water pipe column 1 provide.
To ensure the reliability of measurement system, core holding unit 11 is located in same level with electronic scale 12, prevents two
Back pressure or displacing fluid impact electronic scale are produced between person due to difference in height, error is brought to experimental data.
In summary, the invention discloses gas hydrates rock core flow velocity sensitivity measurement system, including：Rock core clamps
Device；Injection pump；Electronic scale；Pressure sensor；Data acquisition module.Its each several part is connected by pipeline.Injected by injection pump
The data of the displacing fluid displacement rock core of different pressures, data acquisition module record pressure sensor and electronic scale, to determine
The free-boundary problem and the quick critical pressure gradient of speed of rock core, correspond to reservoir for exploitation rock core and experimental data support is provided.
It will be apparent to those skilled in the art that technical scheme that can be as described above and design, make other various
Corresponding change and deformation, and all these changes and deformation should all belong to the protection domain of the claims in the present invention
Within.
Claims (7)
- A kind of 1. gas hydrates rock core flow velocity sensitivity measurement system, it is characterised in that including：Core holding unit, for the fixed rock core to be measured for being put into the core holding unit, table in the cylinder of the core holding unit Face is through laser grinding process；Injection pump, it is connected by pipeline with the core holding unit fluid-infusing port, is entered according to constant pressure displacement displacing fluid The rock core to be measured being fixed in the core holding unit, the fluid of script in the rock core to be measured is gone out with displacement；Electronic scale, it is connected by pipeline with the core holding unit flow export, is flowed through for measuring described in the rock core to be measured The quality of displacing fluid；Pressure sensor, it is connected by pipeline with the core holding unit, injects the core holding unit inlet for measuring With the displacement pressure difference for the displacing fluid for flowing out the core holding unit flow export；Data acquisition module, with the pressure sensor, the electronic scale communicate to connect, for obtain the pressure sensor, The electronic scale measurement data.
- 2. gas hydrates rock core flow velocity sensitivity measurement system as claimed in claim 1, it is characterised in that the electronics Scale is located in same level with the core holding unit.
- 3. gas hydrates rock core flow velocity sensitivity measurement system as claimed in claim 1, it is characterised in that also including water pipe Column, the first valve and the second valve that the corresponding bypass line of control opens and closes, water are respectively equipped with water pipe column branch road, injection pump branch road Tube column branch road is connected by the first valve with core holding unit fluid-infusing port, and injection pump branch road is clamped by the second valve and rock core Device fluid-infusing port is connected.
- 4. gas hydrates rock core flow velocity sensitivity measurement system as claimed in claim 3, it is characterised in that the water pipe is stood Post is connected with the discharge branch road for controlling the water pipe column liquid level.
- 5. gas hydrates rock core flow velocity sensitivity measurement system as claimed in claim 4, it is characterised in that the discharge Branch road quantity is 4, corresponds to the liquid level that the water pipe column corresponds to 0.02Mpa, 0.04Mpa, 0.06Mpa, 0.08Mpa respectively Set, the switch valve that the injection branch corresponding to control opens and closes is correspondingly provided with 4 discharge branch roads.
- 6. gas hydrates rock core flow velocity sensitivity measurement system as claimed in claim 1, it is characterised in that described to be measured Rock core is not cementing exoskeletal rock core.
- 7. the gas hydrates rock core flow velocity sensitivity measurement system as described in claim any one of 1-6, it is characterised in that The quantity of the pressure sensor is more than one, and more than one pressure sensor is arranged in parallel, and it is one more than Pressure sensor range it is different.
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| CN201710672413.8A CN107576604A (en) | 2017-08-08 | 2017-08-08 | A kind of gas hydrates rock core flow velocity sensitivity measurement system |
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| CN201710672413.8A CN107576604A (en) | 2017-08-08 | 2017-08-08 | A kind of gas hydrates rock core flow velocity sensitivity measurement system |
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| CN110206504A (en) * | 2019-05-29 | 2019-09-06 | 广州海洋地质调查局 | A kind of production water metering of pressure maintaining rock core and produce gas metering device and its application method |
| CN113791015A (en) * | 2021-09-13 | 2021-12-14 | 重庆科技学院 | Starting pressure gradient testing device and method for polymer solution displacement thickened oil |
| CN114428035A (en) * | 2020-09-29 | 2022-05-03 | 中国石油化工股份有限公司 | Device and method for measuring density change in natural gas hydrate flowing process |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114428035B (en) * | 2020-09-29 | 2024-05-03 | 中国石油化工股份有限公司 | Device and method for measuring density change in natural gas hydrate flow process |
| CN113791015A (en) * | 2021-09-13 | 2021-12-14 | 重庆科技学院 | Starting pressure gradient testing device and method for polymer solution displacement thickened oil |
| CN113791015B (en) * | 2021-09-13 | 2023-08-22 | 重庆科技学院 | Starting pressure gradient testing device and method for polymer solution displacement thick oil |
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Application publication date: 20180112 |