CN107144671A - Shale gas-water lock effect evaluation device and method under high pressure condition - Google Patents
Shale gas-water lock effect evaluation device and method under high pressure condition Download PDFInfo
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- CN107144671A CN107144671A CN201710485211.2A CN201710485211A CN107144671A CN 107144671 A CN107144671 A CN 107144671A CN 201710485211 A CN201710485211 A CN 201710485211A CN 107144671 A CN107144671 A CN 107144671A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 33
- 238000011156 evaluation Methods 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 title description 8
- 230000015572 biosynthetic process Effects 0.000 claims description 15
- 230000006835 compression Effects 0.000 claims description 13
- 238000007906 compression Methods 0.000 claims description 13
- 238000003287 bathing Methods 0.000 claims description 8
- 239000012530 fluid Substances 0.000 abstract description 14
- 238000005516 engineering process Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 208000002925 dental caries Diseases 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
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Abstract
The invention discloses a shale gas-water lock effect evaluation device under a high-pressure condition, which comprises a sample holder (6) arranged in a constant-temperature cavity, wherein CH is respectively arranged at two ends of the sample holder (6)4Gas inlet pipe and CH4Gas exhaust pipe, CH4The gas exhaust pipe is connected to a gas collection system (14). The invention uses quantitative CH4Shale sample after gas fracturing through fracturing fluid and collecting CH after gas passing through4Gas, final comparison of CH before and after passage through shale sample4The gas variation amount indicates that the more gas is collected, the smaller the water lock degree, and the preferable fracturing fluid is performed.
Description
Technical field
The invention belongs to shale gas development device and method field, and in particular to shale air water lock effect under a kind of condition of high voltage
Answer evaluating apparatus and method.
Background technology
In recent years, used by the commercialization exploitation of the U.S. and Russian shale gas, China is also to unconventional gas shale gas
Exploitation take much count of.Due to being exploited using the method for hydraulic fracturing, water-blocking effect, water lock effect are generated in recovery process
The yield of shale gas exploitation should can be influenceed, therefore, the effect of water-blocking effect is evaluated water-blocking effect and fracturing fluid is produced
Evaluated, and have very important meaning to the exploitation utilization of unconventional gas shale gas resource.Prior art is locked to water
The technology of Effect Evaluation is few, has plenty of directly to prepare fracturing fluid and carry out experiment and makes Waterproof lock agent, have to producing what water was locked
Functional powder is added in duct and eliminates water lock.The direct condition on laboratory simulation stratum of the invention, can directly be evaluated
Selected fracturing fluid produces water-blocking effect, preferably goes out fracturing fluid.
The content of the invention
The technical problem to be solved in the present invention is：Shale air water lock Effect Evaluation device and side under a kind of condition of high voltage are provided
Method, realizes that water-blocking effect is evaluated during shale gas exploitation, guidance is provided to prepare more excellent fracturing fluid, existing to solve
Problem present in technology.
Technical scheme is as follows：
Shale air water locks Effect Evaluation device, including the specimen holder being placed in constant temperature cavity under a kind of condition of high voltage,
Specimen holder two ends are respectively CH4Gas inlet pipe and CH4Gas exhaust pipe, CH4Gas exhaust pipe and gas gathering system phase
Even.
The constant temperature cavity includes sample cavity, and sample cavity is placed in thermostatted water bathing pool.
The CH4Gas inlet pipe is connected with standard gas bomb, and standard gas bomb is connected with compression pump and gas-storing bag respectively.
The CH4Be provided with the first valve between gas inlet pipe and standard gas bomb, standard gas bomb and compression pump it
Between be provided with the second valve, the 3rd valve is provided between gas-storing bag and standard gas bomb.
The gas gathering system includes tank, CH4Gas exhaust pipe through tank successively with the first gas bottle, gas collection
Pipe, the connection of the second gas bottle.
The 4th valve is provided with the gas-collecting pipe.
In such scheme, sample cavity has been mainly support insulation effect, the sustainable internal specimen holder of sample cavity
Deng part (such as one left-hand thread without lid housing, has support in sea water bath in housing), and specimen holder is exactly to clamp
Firmly shale sample, does not allow it to be moved during fracturing experiments.
Shale air water locks Effect Evaluation method under a kind of condition of high voltage, using quantitative CH4Gas passes through fracturing fluid pressure break
Shale sample afterwards, and collect the CH after passing through4Gas, compares by the CH before and after shale sample4Gas variation amount.Quantify at this
In refer to certain mass or volume.
The shale sample local environment temperature, which is equal to, treats simulated formation temperature, CH4Gas pressure, which is equal to, treats simulated formation pressure
Power.
Compared with prior art, under the conditions of the present invention is by simulated formation temperature and pressure, to using different pressure break hydraulic pressure
Progress simulated formation is passed through CH after splitting shale4, then use drainage to be collected to evaluate water-blocking effect, select more excellent
Fracturing fluid.Whole device operating method is simple and convenient, and experimental facilities manufacturing cost is low, and testing expense is low, plant maintenance it is convenient and
Maintenance cost is low, the characteristics of present invention also has simple in construction and safe and reliable.
Brief description of the drawings
Fig. 1 is structural representation of the invention；
In figure, 1- tanks, the valves of 2- the 4th, the gas bottles of 3- second, the gas bottles of 4- first, 5- sample cavitys, 6- specimen holders
Holder, the valves of 7- the 3rd, 8- thermostatted water bathing pools, 9- gas-storing bags, the valves of 10- second, 11- compression pumps, the valves of 12- first, 13-
Standard gas bomb, 14- gas gathering systems.
Embodiment
As shown in figure 1, shale air water lock Effect Evaluation device includes compression pump 11, standard gas bomb under a kind of condition of high voltage
13rd, sample cavity 5, specimen holder 6, gas gathering system 14 and thermostatted water bathing pool 8.Said apparatus from left to right, compression pump
11 most left, is connected to standard gas bomb 13, sample cavity 5 and specimen holder 6 are connected to standard gas bomb 13, sample cavity
5 and specimen holder 6 be connected to gas gathering system 14, gas gathering system 14 is in low order end.The pressure size of compression pump 11
It is to be determined according to the size of strata pressure, in order to simulate real down-hole formation pressure.Standard gas bomb 13 requires every
The CH once stored4Gas is just as many.Sample cavity 5 is, in the outside of specimen holder 6, to support specimen holder 6.
Specimen holder 6 is to install the shale samples by after various fracturing fluid pressure breaks.Gas gathering system 14 mainly includes tank
1, the first gas bottle 4 and the second gas bottle 3.Compression pump 11, gas-storing bag 9, it should all install on the outlet conduit of standard gas bomb 13
One gas valve, it is intended that the charge weight of the gas in guarantee standard gas bomb 13 is the same.
CH4Gas inlet pipe and CH4As long as gas exhaust pipe is into cavity, without insertion shale samples two ends, only
After ensuring to give pressure, CH4Gas can enter the shale sample of pressure break, and the CH of its discharge in cavity4Gas can be received
Collection metering.The present invention seeks to observe CH4Gas is by situation, while collecting the CH by shale sample4Gas.Such as Fig. 1 institutes
Show, can be in CH as a kind of modification and improvement4Gas inlet pipe and CH4It is bigger that a caliber is put again on the outside of gas exhaust pipe
Gas pipeline, is easy to preferably observation and more accurate metering.
Compression pump 11 is to provide pressure for whole device.
Standard gas bomb 13 is methane gas of the storage from gas-storing bag 9.CH in standard gas bomb 134Gas temperature without
It is required that, only require the CH into cavity4Gas is the related parameter of simulated formation.
Specimen holder 6 is mounted in inside sample cavity 5, and sample cavity 5 is arranged in thermostatted water bathing pool 8.
Gas gathering system 14 is mainly tank 1, the first gas gas bottle 4 and the second gas bottle 3 and constituted.
The entrance Pipe installing of second gas bottle 3 has the 4th valve 2 as gas trap.
Compression pump 11, gas-storing bag 9, it is respectively mounted a gas valve on the outlet conduit of standard gas bomb 13.
It is preferred that, the pressure size of compression pump 11 is determined according to strata pressure size, it is therefore an objective to simulated formation pressure shape
Water-blocking effect under state.
Standard gas bomb 13 is made by certain gas storage specification, it is desirable to which the gas flow loaded each time is the same.Due on ground
Under stressor layer, flowmeter can be damaged using the metering of general flowmeter.
Compression pump 11, gas-storing bag 9, a gas valve should be all installed on the outlet conduit of standard gas bomb 13, it is therefore an objective to
The charge weight of gas in guarantee standard gas bomb 13 is the same.
Sample cavity 5 is arranged on thermostatted water bathing pool 8, is the simulation in order to make the temperature in cavity identical with formation temperature
Formation temperature.
The temperature of thermostatted water bathing pool 8 should be determined according to formation temperature.
Sample cavity 5 uses steel structure support, it is desirable to which heat conductivility will get well, it is ensured that the temperature of sample cavity 5 and water bath with thermostatic control
The temperature of pond 8 is almost identical, it is ensured that the authenticity of simulated formation temperature.
Gas gathering system 14 is collected using drainage, because CH4Gas is water insoluble.
The inlet end of second gas bottle 3 installs gas valve purpose, it is ensured that gas not expanding comes out.
Below in conjunction with the accompanying drawings 1 explanation the present apparatus application method.
As shown in figure 1, shale air water locks Effect Evaluation device and method under a kind of condition of high voltage, start before test, close
The second valve 10 and the first valve 12 are closed, gas is first added in gas-storing bag 9, the 3rd valve 7 is opened, makes CH4Full of whole mark
Quasi- gas bomb 13, the shale sample after specimen holder 6 is installed using fracturing fluid pressure break, connects pipeline.Make thermostatted water
The temperature of bathing pool 8 is formation temperature.First Opening pressure pump 11, then open the second valve 10, the 4th valve 2 and the first valve 12,
Pressure is maintained on strata pressure, CH4Gas passes through shale samples under simulated formation temperature and pressure, passes through drainage
Collect the CH passed through4Gas, so as to evaluate water-blocking effect, evaluation can calculate CH by PV=nRT4The quality or body of gas
Product, compares the gas and regular set cylinder gas after collecting, and the gas of collection is more, illustrates that water lock degree is smaller, is carried out with this
Fracturing fluid it is preferred.Different fracturing fluids repeat the above steps, and then can select the fracturing fluid more having.
The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, should all be contained
Cover within protection scope of the present invention, therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (8)
1. shale air water locks Effect Evaluation device under a kind of condition of high voltage, it is characterised in that：Including the examination being placed in constant temperature cavity
Sample clamper (6), specimen holder (6) two ends are respectively CH4Gas inlet pipe and CH4Gas exhaust pipe, CH4Gas exhaust pipe
It is connected with gas gathering system (14).
2. shale air water locks Effect Evaluation device under a kind of condition of high voltage according to claim 1, it is characterised in that：It is described
Constant temperature cavity includes sample cavity (5), and sample cavity (5) is placed in thermostatted water bathing pool (8).
3. shale air water locks Effect Evaluation device under a kind of condition of high voltage according to claim 1, it is characterised in that：It is described
CH4Gas inlet pipe is connected with standard gas bomb (13), standard gas bomb (13) respectively with compression pump (11) and gas-storing bag (9) phase
Even.
4. shale air water locks Effect Evaluation device under a kind of condition of high voltage according to claim 3, it is characterised in that：It is described
CH4The first valve (12), standard gas bomb (13) and compression pump are provided between gas inlet pipe and standard gas bomb (13)
(11) the second valve (10) is provided between, the 3rd valve (7) is provided between gas-storing bag (9) and standard gas bomb (13).
5. shale air water locks Effect Evaluation device under a kind of condition of high voltage according to claim 1, it is characterised in that：It is described
Gas gathering system (14) includes tank (1), CH4Gas exhaust pipe is received with the first gas bottle (4), gas successively through tank (1)
Collector, the second gas bottle (3) connection.
6. shale air water locks Effect Evaluation device under a kind of condition of high voltage according to claim 5, it is characterised in that：It is described
The 4th valve (2) is provided with gas-collecting pipe.
7. shale air water locks Effect Evaluation method under a kind of condition of high voltage, it is characterised in that：Using quantitative CH4Gas passes through pressure
The shale sample after hydraulic pressure splits is split, and collects the CH after passing through4Gas, compares by the CH before and after shale sample4Gas variation amount.
8. shale air water locks Effect Evaluation method under a kind of condition of high voltage according to claim 7, it is characterised in that：It is described
Shale sample local environment temperature, which is equal to, treats simulated formation temperature, CH4Gas pressure, which is equal to, treats simulated formation pressure.
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|---|---|---|---|
| CN201710485211.2A CN107144671B (en) | 2017-06-23 | 2017-06-23 | Shale gas-water lock effect evaluation device and method under high pressure condition |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710485211.2A CN107144671B (en) | 2017-06-23 | 2017-06-23 | Shale gas-water lock effect evaluation device and method under high pressure condition |
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| Publication Number | Publication Date |
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| CN107144671A true CN107144671A (en) | 2017-09-08 |
| CN107144671B CN107144671B (en) | 2022-04-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112180039A (en) * | 2020-09-18 | 2021-01-05 | 中国航发四川燃气涡轮研究院 | Method for detecting change of coating structure performance of aero-engine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112180039A (en) * | 2020-09-18 | 2021-01-05 | 中国航发四川燃气涡轮研究院 | Method for detecting change of coating structure performance of aero-engine |
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| Publication number | Publication date |
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| CN107144671B (en) | 2022-04-19 |
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