CN205778833U - Carbon dioxide drives gas injection well annular space area and presses testing arrangement - Google Patents
Carbon dioxide drives gas injection well annular space area and presses testing arrangement Download PDFInfo
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- CN205778833U CN205778833U CN201620438543.6U CN201620438543U CN205778833U CN 205778833 U CN205778833 U CN 205778833U CN 201620438543 U CN201620438543 U CN 201620438543U CN 205778833 U CN205778833 U CN 205778833U
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 176
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 89
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 89
- 238000002347 injection Methods 0.000 title claims abstract description 63
- 239000007924 injection Substances 0.000 title claims abstract description 63
- 238000012360 testing method Methods 0.000 title claims abstract description 63
- 238000012545 processing Methods 0.000 claims abstract description 32
- 238000001514 detection method Methods 0.000 claims abstract description 26
- 239000007789 gas Substances 0.000 claims description 288
- 238000005259 measurement Methods 0.000 claims description 43
- 229910052760 oxygen Inorganic materials 0.000 claims description 19
- 239000001301 oxygen Substances 0.000 claims description 19
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 18
- 239000000203 mixture Substances 0.000 claims description 17
- 238000001914 filtration Methods 0.000 claims description 5
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 20
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 19
- 239000003921 oil Substances 0.000 description 12
- 238000005260 corrosion Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000002405 diagnostic procedure Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 238000012113 quantitative test Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 230000000844 anti-bacterial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 230000006012 detection of carbon dioxide Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 230000006872 improvement Effects 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
- 230000002265 prevention Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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Abstract
The utility model discloses a carbon dioxide drives gas injection well annular space area pressure testing arrangement belongs to carbon dioxide and drives gas injection well oil jacket annular space test technical field. The test device includes: a gas processing control unit (1), a gas flow metering unit (2), a gas component detection unit (3) and a data processing unit (4); the gas inlet end of the gas treatment control unit (1) is connected with a large four-way joint of a carbon dioxide flooding gas injection well wellhead; the gas outlet end of the gas processing control unit (1) is divided into two branches, one branch is connected with the gas inlet end of the gas flow metering unit (2), and the other branch is connected with the gas inlet end of the gas component detection unit (3); the data processing unit (4) is electrically connected with the gas flow metering unit (2) and the gas component detection unit (3). The test device can quantitatively test the annulus pressure condition of the carbon dioxide flooding gas injection well, and the test result is accurate.
Description
Technical field
This utility model relates to carbon dioxide flooding gas injection well oil jacket annulus logging Technology field, particularly to a kind of carbon dioxide flooding gas injection well annular space pressure test device.
Background technology
Carbon dioxide drive oil production technology be by gas injection well to oil reservoir injecting carbon dioxide, utilize carbon dioxide drive crude oil flow oil recovery technique.During oil reservoir injecting carbon dioxide, carbon dioxide can leak in the oil jacket annular space of gas injection well, makes oil jacket annular pressure raise, causes the generation of annular space phenomenon with pressure.The annular space risk that can increase gas injection well safety work with pressure.Therefore, the situation with pressure of the annular space to carbon dioxide flooding gas injection well is needed to test, i.e. to whether carbon dioxide leakage occurring, occurring the reason of carbon dioxide leakage and the degree of carbon dioxide leakage to test, thus provide foundation for formulating relevant prevention and control measure.
The method tested carbon dioxide flooding gas injection well annular space situation with pressure at present is: utilizes Pressure gauge to measure annular pressure after release annular pressure, judges according to the change of annular pressure situation with pressure to annular space.
During realizing this utility model, designer finds that prior art at least there is problems in that existing carbon dioxide flooding gas injection well annular space pressure test method is only capable of test wrapper blanking bar pressure situation qualitatively, and test result is not accurate enough.
Utility model content
For solving above-mentioned technical problem, this utility model offer one can quantitative test carbon dioxide flooding gas injection well annular space carbon dioxide flooding with pressure gas injection well annular space pressure test device.
Specifically, including following technical scheme:
A kind of carbon dioxide flooding gas injection well annular space pressure test device, described test device includes:
Gas treatment control unit, measurement of gas flow unit, gas component detector unit and data processing unit；The inlet end of described gas treatment control unit is connected with carbon dioxide flooding gas injection well well head big four；The outlet side of described gas treatment control unit is divided into two branch roads, a branch road to be connected with the inlet end of described measurement of gas flow unit, and another branch road is connected with the inlet end of described gas component detector unit；Described data processing unit electrically connects with described measurement of gas flow unit and described gas component detector unit；Described gas treatment control unit is for reducing pressure and filtration treatment to the annular space gas from described carbon dioxide flooding gas injection well；Described measurement of gas flow unit is for detecting the flow of described annular space gas；Described gas component detector unit is for detecting the composition of described annular space gas；The annular space situation with pressure of described carbon dioxide flooding gas injection well is judged by described data processing unit for the composition of the described annular space gas that the flow and the detection of described gas component detector unit detecting the described annular space gas obtained according to described measurement of gas flow unit obtains.
Further, described gas treatment control unit includes the first decompressor, threeway, the second decompressor and dehumidifying defecator；The air inlet of described first decompressor is connected with described carbon dioxide flooding gas injection well well head big four；The gas outlet of described first decompressor is connected with an interface of described threeway, and two other interface of described threeway air inlet with the inlet end of described measurement of gas flow unit and described second decompressor respectively is connected；The gas outlet of described second decompressor is connected with the air inlet of described dehumidifying defecator；The gas outlet of described dehumidifying defecator is connected with the inlet end of described gas component detector unit.
Further, described gas treatment control unit also includes: the first casing；Air inlet, the first gas outlet and the second gas outlet it is provided with on described first casing；Described first decompressor, threeway, the second decompressor and dehumidifying defecator are arranged in described first casing；The air inlet of described first decompressor is connected with carbon dioxide flooding gas injection well well head big four by the air inlet of described first casing；Described threeway is connected with the inlet end of described measurement of gas flow unit by the first gas outlet of described first casing；The gas outlet of described dehumidifying defecator is connected with the inlet end of described gas component detector unit by the second gas outlet of described first casing.
Further, described measurement of gas flow unit includes: pressure compensator, effusion meter and temperature compensation means；Described effusion meter electrically connects with described data processing unit；The air inlet of described effusion meter is connected with the first gas outlet of described first casing.
Further, described measurement of gas flow unit also includes: the second casing；It is provided with air inlet and air vent on described second casing；Described pressure compensator, effusion meter and temperature compensation means are arranged in described second casing；The air inlet of described effusion meter is connected with the first gas outlet of described first casing by the air inlet of described second casing；The gas outlet of described effusion meter is connected with the air vent of described second casing.
Further, described gas component detector unit includes oxygen detection instrument, H2S detector, carbon dioxide detector and data acquisition unit；Described oxygen detection instrument, H2S detector and carbon dioxide detector electrically connect with described data acquisition unit；Described data acquisition unit electrically connects with described data processing unit.
Further, described gas component detector unit also includes: the 3rd casing；It is provided with air inlet and air vent on described 3rd casing；Described oxygen detection instrument, H2S detector, carbon dioxide detector and data acquisition unit are arranged in described 3rd casing；The air inlet of described 3rd casing is connected with the second gas outlet of described first casing.
Further, the air inlet of described first casing is connected with described carbon dioxide flooding gas injection well well head big four by gas connection pipe line.
Further, described gas connection pipe line is provided with earth anchor.
Further, the exhaust ports of described second casing and the exhaust ports of described 3rd casing are provided with tail gas collecting device.
The technical scheme that this utility model embodiment provides provides the benefit that:
In the carbon dioxide flooding gas injection well annular space pressure test device that this utility model embodiment provides, annular space gas from carbon dioxide flooding gas injection well carries out reducing pressure and after filtration treatment through gas treatment control unit, a part of annular space gas enters measurement of gas flow unit, and another part annular space gas enters gas component detector unit.The flow of annular space gas is detected by measurement of gas flow unit, and the composition of annular space gas is detected by gas component detector unit.Testing result is transmitted to data processing unit by measurement of gas flow unit and gas component detector unit respectively, and data processing unit then changes in flow rate and composition situation with pressure to annular space according to annular space gas judges.The test device that this utility model embodiment provides carries out dynamic monitoring by flow and the composition of annular space gas during discharging carbon dioxide flooding gas injection well oil jacket annular pressure, realize the quantitative test to carbon dioxide flooding gas injection well annular space situation with pressure, analyzing annular space reason with pressure, judge leakiness, test result is accurate.
Accompanying drawing explanation
In order to be illustrated more clearly that the technical scheme in this utility model embodiment, in describing embodiment below, the required accompanying drawing used is briefly described, apparently, accompanying drawing in describing below is only embodiments more of the present utility model, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
The structural representation of the carbon dioxide flooding gas injection well annular space pressure test device that Fig. 1 provides for this utility model embodiment；
The structural representation of gas treatment control unit in the carbon dioxide flooding gas injection well annular space pressure test device that Fig. 2 provides for this utility model embodiment；
The structural representation of measurement of gas flow unit in the carbon dioxide flooding gas injection well annular space pressure test device that Fig. 3 provides for this utility model embodiment；
The front view of gas component detector unit in the carbon dioxide flooding gas injection well annular space pressure test device that Fig. 4 provides for this utility model embodiment；
The rearview of gas component detector unit in the carbon dioxide flooding gas injection well annular space pressure test device that Fig. 5 provides for this utility model embodiment.
Reference in figure represents respectively:
1-gas treatment control unit；
The air inlet of 11-the first casing；First gas outlet of 12-the first casing；
Second gas outlet of 13-the first casing；14-the first decompressor；15-the second decompressor；
16-dehumidifies defecator；17-threeway；18-the first casing；
2-measurement of gas flow unit；
The air inlet of 21-the second casing；The air vent of 22-the second casing；23-pressure compensator；
24-effusion meter；25-temperature compensation means；26-the second casing；27-handle；
3-gas component detector unit；
The air inlet of 31-the 3rd casing；The air vent of 32-the 3rd casing；33-oxygen detection instrument；
34-H2S detector；35-carbon dioxide detector；36-data acquisition unit；37-the 3rd casing；
4-data processing unit；
5-tail gas collecting device；
6-gas connection pipe line；
7-earth anchor.
Detailed description of the invention
For making the technical solution of the utility model and advantage clearer, below in conjunction with accompanying drawing, this utility model embodiment is described in further detail.Unless otherwise defined, all technical terms used by this utility model embodiment are respectively provided with the identical implication being generally understood that with those skilled in the art.
This utility model embodiment provides a kind of carbon dioxide flooding gas injection well annular space pressure test device, sees Fig. 1, and this test device includes: gas treatment control unit 1, measurement of gas flow unit 2, gas component detector unit 3 and data processing unit 4.
The inlet end of gas treatment control unit 1 is connected with carbon dioxide flooding gas injection well well head big four；The outlet side of gas treatment control unit 1 is divided into two branch roads, a branch road to be connected with the inlet end of measurement of gas flow unit 2, and another branch road is connected with the inlet end of gas component detector unit 3.
Data processing unit 4 electrically connects with measurement of gas flow unit 2 and gas component detector unit 3.
Gas treatment control unit 1 is for reducing pressure and filtration treatment to the annular space gas from carbon dioxide flooding gas injection well；Measurement of gas flow unit 2 is for detecting the flow of annular space gas；Gas component detector unit 3 is for detecting the composition of annular space gas；The annular space situation with pressure of carbon dioxide flooding gas injection well is judged by data processing unit 4 for the composition of the annular space gas that the flow and gas component detector unit 3 detection detecting the annular space gas obtained according to measurement of gas flow unit 2 obtains.
In the carbon dioxide flooding gas injection well annular space pressure test device that this utility model embodiment provides, annular space gas from carbon dioxide flooding gas injection well carries out reducing pressure and after filtration treatment through gas treatment control unit 1, a part of annular space gas enters measurement of gas flow unit 2, and another part annular space gas enters gas component detector unit 3.The flow of annular space gas is detected by measurement of gas flow unit 2, and the composition of annular space gas is detected by gas component detector unit 3.Testing result is transmitted to data processing unit 4 by measurement of gas flow unit 2 and gas component detector unit 3 respectively, and data processing unit 4 then changes in flow rate and composition situation with pressure to annular space according to annular space gas judges.The test device that this utility model embodiment provides carries out dynamic monitoring by flow and the composition of annular space gas during discharging carbon dioxide flooding gas injection well oil jacket annular pressure, realize the quantitative test to carbon dioxide flooding gas injection well annular space situation with pressure, analyzing annular space reason with pressure, judge leakiness, test result is accurate.
Can use for reference B-B Test annular space diagnostic method with pressure commonly used in the art, changes in flow rate and composition situation with pressure to annular space according to annular space gas judge.
Further, seeing Fig. 2, in above-mentioned test device, gas treatment control unit 1 includes the first decompressor 14, threeway the 17, second decompressor 15 and dehumidifying defecator 16.The air inlet of the first decompressor 14 is connected with carbon dioxide flooding gas injection well well head big four；The gas outlet of the first decompressor 14 is connected with an interface of threeway 17, and two other interface of threeway 17 is connected with the inlet end of measurement of gas flow unit 2 and the air inlet of the second decompressor 15 respectively.The gas outlet of the second decompressor 15 is connected with the air inlet of dehumidifying defecator 16；The gas outlet of dehumidifying defecator 16 is connected with the inlet end of gas component detector unit 3.Annular space gas first passes around the first decompressor 14 to carry out reducing pressure for the first time, makes the pressure of annular space gas drop to below certain numerical value (such as below 4MPa)；It is divided into two parts after post-decompression annular space gas is by threeway 17 for the first time, it is partly into measurement of gas flow unit 2 and carries out flow detection, another part reduces pressure (being such as down to 0.2MPa) further through the second decompressor 15 again, and entrance gas component detector unit 3 carries out composition detection after dehumidifying defecator 16 removes impurity.The concrete form of first decompressor the 14, second decompressor 15 and dehumidifying defecator 16 does not has considered critical, this area routine techniques means.
Further, seeing Fig. 2, in above-mentioned test device, gas treatment control unit 1 is in the installation at carbon dioxide flooding gas injection well scene for convenience, and gas treatment control unit 1 is additionally provided with the first casing 18.Air inlet the 11, first gas outlet 12 and the second gas outlet 13 it is provided with on first casing 18.Above-mentioned the first decompressor 14, threeway the 17, second decompressor 15 and dehumidifying defecator 16 are arranged in the first casing 18.The air inlet of the first decompressor 14 is connected with carbon dioxide flooding gas injection well well head big four by the air inlet 11 of the first casing 18, i.e. the air inlet of carbon dioxide flooding gas injection well well head big four, the air inlet 11 of the first casing 18 and the first decompressor 14 is sequentially connected with.Threeway 17 is connected with the inlet end of measurement of gas flow unit 2 by the first gas outlet 12 of the first casing 18.The gas outlet of dehumidifying defecator 16 is connected with the inlet end of gas component detector unit 3 by the second gas outlet 13 of the first casing 18.
It will be appreciated by persons skilled in the art that and valve can be set between threeway 17 and the second decompressor 15, thus control to enter the ratio of the annular space gas of measurement of gas flow unit 2 and gas component detector unit 3.Pressure transducer can also be set near the air inlet of the first decompressor 14, detect the pressure of annular space gas, and pressure transducer is electrically connected with data processing unit 4, by the pressure transmission of annular space gas that detects to data processing unit 4, match with flow, the one-tenth gradation parameter of annular space gas, improve the accuracy of annular space pressure test further.
Further, seeing Fig. 3, in above-mentioned test device, measurement of gas flow unit 2 includes: pressure compensator 23, effusion meter 24 and temperature compensation means 25.The air inlet of effusion meter 24 and the first gas outlet 12 of the first casing 18 connect.Effusion meter 24 electrically connects with data processing unit 4.Annular space gas from gas treatment control unit 1 passes through effusion meter 24, and the flow of the effusion meter 24 annular space gas to passing through detects, and transmits testing result to data processing unit 4.Wherein, pressure compensator 23 and temperature compensation means 25 are separately positioned near effusion meter 24 air inlet and the position of gas outlet, compensate pressure and temperature, so that testing result is more accurate.
Further, seeing Fig. 3, in above-mentioned test device, measurement of gas flow unit 2 is in the installation at carbon dioxide flooding gas injection well scene for convenience, and measurement of gas flow unit 2 is provided with the second casing 26.Air inlet 21 and air vent 22 it is provided with on second casing 26.Above-mentioned pressure compensator 23, effusion meter 24 and temperature compensation means 25 are arranged in the second casing 26.The air inlet of effusion meter 24 is connected with the first gas outlet 12 of the first casing 18 by the air inlet 21 of the second casing 26.The gas outlet of effusion meter 24 is connected with the air vent 22 of the second casing 26.It is additionally provided with handle 27 on second casing 26, is easy to installation and the movement of measurement of gas flow unit 2 further.
Further, for the annular space gas of carbon dioxide flooding gas injection well, its possible component has oxygen, hydrogen sulfide and carbon dioxide, and therefore, the content of oxygen, hydrogen sulfide and carbon dioxide should at least can be detected by gas component detector unit 3.Based on this, seeing Fig. 4 and combine Fig. 5, in above-mentioned test device, gas component detector unit 3 includes oxygen detection instrument 33, H2S detector 34, carbon dioxide detector 35 and data acquisition unit 36.Oxygen detection instrument 33, H2S detector 34 and carbon dioxide detector 35 electrically connect with data acquisition unit 36.Data acquisition unit 36 electrically connects with data processing unit 4.Data acquisition unit 36 gathers oxygen detection instrument 33, H2S detector 34 and the testing result of carbon dioxide detector 35, and transmits testing result to data processing unit 4.It will be appreciated by persons skilled in the art that by hydrogen sulfide in annular space gas and the detection of carbon dioxide, in addition to can improving the accuracy of annular space pressure test, additionally it is possible to the corrosion condition of annular space is analyzed, provide data for annular space anticorrosion.
Similarly, seeing Fig. 4 and combine Fig. 5, for the ease of the installation of gas component detector unit 3, gas component detector unit 3 is additionally provided with the 3rd casing 37.Air inlet 31 and air vent 32 it is provided with on 3rd casing 37.Oxygen detection instrument 33, H2S detector 34, carbon dioxide detector 35 and data acquisition unit 36 are arranged in the 3rd casing 37.The air inlet 31 of the 3rd casing 37 is connected with the second gas outlet 13 of the first casing 18.Oxygen detection instrument 33, H2S detector 34 and carbon dioxide detector 35 can be arranged in series, oxygen content in annular space gas, hydrogen sulfide content and carbon dioxide content, by sequentially entering oxygen detection instrument 33, H2S detector 34 and carbon dioxide detector 35 after the air inlet 31 of the 3rd casing 37, are detected by annular space gas.
Further, seeing Fig. 1, in above-mentioned test device, the air inlet 11 of the first casing 18 is connected with carbon dioxide flooding gas injection well well head big four by gas connection pipe line 6.In order to ensure that gas connection pipe line 6 keeps stable during test plant running, gas connection pipe line 6 is additionally provided with earth anchor 7.
Further, see Fig. 1, in above-mentioned test device, in order to prevent the directly discharge of annular space gas at the air vent 22 of the second casing 26 and at the air vent 32 of the 3rd casing 37, environment can be provided with tail gas collecting device 5.Concrete form this utility model embodiment of tail gas collecting device 5 is not particularly limited, tail gas collecting device commonly used in the art.
Further, the data processing unit in this utility model embodiment can include arbitrarily having data operation, process, analyzes and the equipment of the function such as storage, such as notebook computer, desktop computer and panel computer etc..
The operation principle of the carbon dioxide flooding gas injection well annular space pressure test device that this utility model embodiment provides is, open carbon dioxide flooding gas injection well big four valve, annular space gas in carbon dioxide flooding gas injection well annular space is entered gas treatment control unit 1 by the air inlet 11 of the first casing 18 after gas connection pipe line 6, in gas treatment control unit 1, first pass around the first decompressor 14 to carry out reducing pressure for the first time, be that the pressure of annular space gas drops to below certain numerical value (such as below 4MPa).Two parts it are divided into: a part is exported by the first gas outlet 12 of the first casing 18 after post-decompression annular space gas is by threeway 17 for the first time, then measurement of gas flow unit 2 is entered by the air inlet of the second casing 26, the effusion meter 24 of measurement of gas flow unit 2 carries out Real-time and Dynamic Detection to the flow of annular space gas, and the data that detection obtains are transmitted to data processing unit 4；Another part reduces pressure (being such as down to 0.2MPa) further through the second decompressor 15 again, and exported by the second gas outlet 13 of the first casing 18 after dehumidifying defecator 16 removes impurity, then gas component detector unit 3 is entered by the air inlet of the 3rd casing 37, the oxygen detection instrument 33 of gas component detector unit 3, H2S detector 34 and carbon dioxide detector 35 are respectively to the oxygen content in annular space gas, hydrogen sulfide content and carbon dioxide content detect, data acquisition unit 36 gathers above-mentioned oxygen content, hydrogen sulfide content and carbon dioxide content data are also transmitted to data processing unit 4.The tail gas of measurement of gas flow unit 2 and gas component detector unit 3 enters tail gas collecting device 5 after being discharged by the air vent 22 of the second casing 26 and the air vent 32 of the 3rd casing 37 respectively.Carbon dioxide flooding gas injection well annular space situation with pressure is judged by data processing unit 4 according to data on flows and the compositional data of annular space gas.
With the test data instance of Jilin Oil Field black 79-1# carbon dioxide flooding gas injection well, the operation principle that this utility model embodiment offer is tested device is described further.The annular space gas flow data obtained by measurement of gas flow unit 2 detection shows, within the testing time, after release annular pressure, the flow of annular space gas is gradually reduced, until annular pressure reduces to 0MPa, after 15 days, the flow of annular space gas the most gradually increases；The annular space gas-composition data obtained by gas component detector unit 3 detection shows, containing carbon dioxide and a small amount of hydrogen sulfide gas in annular space gas.Summary data, and according to B-B Test annular space diagnostic method with pressure, it is judged that annular space phenomenon with pressure occurs in black 79-1# well, and annular space with pressure be owing to pit shaft oil pipe or micro-the oozing of packer cause, belong to II grade of low-risk, continuous observation should be kept.Simultaneously; owing to annular space gas existing carbon dioxide and hydrogen sulfide; and the annular protective liquid used by black 79-1# well is water base protection liquid; water base protection liquid coexists easily cause tube corrosion with carbon dioxide and hydrogen sulfide gas; therefore need to add antibacterial in annular protective liquid, add sulfur elimination simultaneously and remove and original in annular space solution there is S2-, it is to avoid the existence of SRB (sulfate reducting bacteria) causes stress corrosion environment.
To sum up, the carbon dioxide flooding gas injection well annular space pressure test device that this utility model embodiment provides carries out dynamic monitoring by flow and the composition of annular space gas during discharging carbon dioxide flooding gas injection well oil jacket annular pressure, B-B Test annular space diagnostic method with pressure and related software is coordinated to calculate means, can effectively analyze carbon dioxide flooding gas injection well annular space reason with pressure, judge main seepage place and leak magnitude, to take corresponding control measures, reduce the potential safety hazard caused because annular space is with pressure, be finally reached the purpose of safe gas injection., forming according to annular space gas meanwhile, analyze pit shaft corrosion factor, the formulation for anticorrosive measure provides foundation.
The above is for only for ease of those skilled in the art and understands the technical solution of the utility model, not in order to limit this utility model.All within spirit of the present utility model and principle, any modification, equivalent substitution and improvement etc. made, within should be included in protection domain of the present utility model.
Claims (10)
1. a carbon dioxide flooding gas injection well annular space pressure test device, it is characterised in that described test device includes:
Gas treatment control unit (1), measurement of gas flow unit (2), gas component detector unit (3) and data processing unit (4)；
The inlet end of described gas treatment control unit (1) is connected with carbon dioxide flooding gas injection well well head big four；The outlet side of described gas treatment control unit (1) is divided into two branch roads, article one, branch road is connected with the inlet end of described measurement of gas flow unit (2), and another branch road is connected with the inlet end of described gas component detector unit (3)；
Described data processing unit (4) electrically connects with described measurement of gas flow unit (2) and described gas component detector unit (3)；
Described gas treatment control unit (1) is for reducing pressure and filtration treatment to the annular space gas from described carbon dioxide flooding gas injection well；
Described measurement of gas flow unit (2) is for detecting the flow of described annular space gas；
Described gas component detector unit (3) is for detecting the composition of described annular space gas；
The annular space situation with pressure of described carbon dioxide flooding gas injection well is judged by described data processing unit (4) for the composition of the described annular space gas that the flow and described gas component detector unit (3) detection detecting the described annular space gas obtained according to described measurement of gas flow unit (2) obtains.
Test device the most according to claim 1, it is characterized in that, described gas treatment control unit (1) includes the first decompressor (14), threeway (17), the second decompressor (15) and dehumidifying defecator (16)；
The air inlet of described first decompressor (14) is connected with described carbon dioxide flooding gas injection well well head big four；The gas outlet of described first decompressor (14) is connected with an interface of described threeway (17), and two other interface of described threeway (17) is connected with the inlet end of described measurement of gas flow unit (2) and the air inlet of described second decompressor (15) respectively；
The gas outlet of described second decompressor (15) is connected with the air inlet of described dehumidifying defecator (16)；The gas outlet of described dehumidifying defecator (16) is connected with the inlet end of described gas component detector unit (3).
Test device the most according to claim 2, it is characterised in that described gas treatment control unit (1) also includes: the first casing (18)；Air inlet (11), the first gas outlet (12) and the second gas outlet (13) it are provided with on described first casing (18)；
Described first decompressor (14), threeway (17), the second decompressor (15) and dehumidifying defecator (16) are arranged in described first casing (18)；
The air inlet of described first decompressor (14) is connected with carbon dioxide flooding gas injection well well head big four by the air inlet (11) of described first casing (18)；
Described threeway (17) is connected with the inlet end of described measurement of gas flow unit (2) by first gas outlet (12) of described first casing (18)；The gas outlet of described dehumidifying defecator (16) is connected with the inlet end of described gas component detector unit (3) by second gas outlet (13) of described first casing (18).
Test device the most according to claim 3, it is characterised in that described measurement of gas flow unit (2) including: pressure compensator (23), effusion meter (24) and temperature compensation means (25)；Described effusion meter (24) electrically connects with described data processing unit (4)；
The air inlet of described effusion meter (24) is connected with first gas outlet (12) of described first casing (18).
Test device the most according to claim 4, it is characterised in that described measurement of gas flow unit (2) also includes: the second casing (26)；Air inlet (21) and air vent (22) it is provided with on described second casing (26)；
Described pressure compensator (23), effusion meter (24) and temperature compensation means (25) are arranged in described second casing (26)；
The air inlet of described effusion meter (24) is connected with first gas outlet (12) of described first casing (18) by the air inlet (21) of described second casing (26)；
The gas outlet of described effusion meter (24) is connected with the air vent (22) of described second casing (26).
Test device the most according to claim 5, it is characterized in that, described gas component detector unit (3) includes oxygen detection instrument (33), H2S detector (34), carbon dioxide detector (35) and data acquisition unit (36)；
Described oxygen detection instrument (33), H2S detector (34) and carbon dioxide detector (35) electrically connect with described data acquisition unit (36)；
Described data acquisition unit (36) electrically connects with described data processing unit (4).
Test device the most according to claim 6, it is characterised in that described gas component detector unit (3) also includes: the 3rd casing (37)；It is provided with air inlet (31) and air vent (32) on described 3rd casing (37)；
Described oxygen detection instrument (33), H2S detector (34), carbon dioxide detector (35) and data acquisition unit (36) are arranged in described 3rd casing (37)；
The air inlet (31) of described 3rd casing (37) is connected with second gas outlet (13) of described first casing (18).
Test device the most according to claim 3, it is characterised in that the air inlet (11) of described first casing (18) is connected with described carbon dioxide flooding gas injection well well head big four by gas connection pipe line (6).
Test device the most according to claim 8, it is characterised in that be provided with earth anchor (7) on described gas connection pipe line (6).
Test device the most according to claim 7, it is characterized in that, air vent (22) place of described second casing (26) and air vent (32) place of described 3rd casing (37) are provided with tail gas collecting device (5).
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| CN201620438543.6U CN205778833U (en) | 2016-05-13 | 2016-05-13 | Carbon dioxide drives gas injection well annular space area and presses testing arrangement |
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| CN201620438543.6U CN205778833U (en) | 2016-05-13 | 2016-05-13 | Carbon dioxide drives gas injection well annular space area and presses testing arrangement |
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| CN111927429A (en) * | 2020-07-29 | 2020-11-13 | 北京理工大学 | Detection and early warning device and method for carbon dioxide stored in oil and gas field exploitation layer |
| CN113504334A (en) * | 2021-06-18 | 2021-10-15 | 西安恩诺维新石油技术有限公司 | Pressurized annulus sampling analysis system and method for three-super gas well |
| CN114509531A (en) * | 2020-11-16 | 2022-05-17 | 中国石油化工股份有限公司 | High-acid gas well annulus protection fluid performance evaluation device and evaluation method |
| CN114689805A (en) * | 2022-04-15 | 2022-07-01 | 西南石油大学 | Non-bonding flexible pipe annular space detection and exhaust monitoring device |
| CN115704317A (en) * | 2021-08-12 | 2023-02-17 | 中国石油化工股份有限公司 | Portable dynamic monitoring device for annular fluid of annular pressurized well |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111927429A (en) * | 2020-07-29 | 2020-11-13 | 北京理工大学 | Detection and early warning device and method for carbon dioxide stored in oil and gas field exploitation layer |
| CN111927429B (en) * | 2020-07-29 | 2022-02-11 | 北京理工大学 | Detection and early warning device and method for carbon dioxide stored in oil and gas field exploitation layer |
| CN114509531A (en) * | 2020-11-16 | 2022-05-17 | 中国石油化工股份有限公司 | High-acid gas well annulus protection fluid performance evaluation device and evaluation method |
| CN113504334A (en) * | 2021-06-18 | 2021-10-15 | 西安恩诺维新石油技术有限公司 | Pressurized annulus sampling analysis system and method for three-super gas well |
| CN115704317A (en) * | 2021-08-12 | 2023-02-17 | 中国石油化工股份有限公司 | Portable dynamic monitoring device for annular fluid of annular pressurized well |
| CN114689805A (en) * | 2022-04-15 | 2022-07-01 | 西南石油大学 | Non-bonding flexible pipe annular space detection and exhaust monitoring device |
| CN114689805B (en) * | 2022-04-15 | 2023-09-29 | 西南石油大学 | Non-bonding flexible pipe annular space detection and exhaust monitoring device |
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