CN110847895A - Device and method for monitoring leakage of geological carbon dioxide sealing cover layer - Google Patents
Device and method for monitoring leakage of geological carbon dioxide sealing cover layer Download PDFInfo
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 244
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 122
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 122
- 238000012544 monitoring process Methods 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000007789 sealing Methods 0.000 title claims abstract description 20
- 238000002347 injection Methods 0.000 claims abstract description 15
- 239000007924 injection Substances 0.000 claims abstract description 15
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 11
- 238000012806 monitoring device Methods 0.000 claims abstract description 10
- 238000011161 development Methods 0.000 claims abstract description 4
- 239000007788 liquid Substances 0.000 claims description 37
- 150000001412 amines Chemical class 0.000 claims description 35
- 239000002696 acid base indicator Substances 0.000 claims description 14
- 239000000243 solution Substances 0.000 claims description 9
- 238000005070 sampling Methods 0.000 claims description 7
- ZPLCXHWYPWVJDL-UHFFFAOYSA-N 4-[(4-hydroxyphenyl)methyl]-1,3-oxazolidin-2-one Chemical compound C1=CC(O)=CC=C1CC1NC(=O)OC1 ZPLCXHWYPWVJDL-UHFFFAOYSA-N 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 4
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 3
- 230000001476 alcoholic effect Effects 0.000 claims description 3
- 238000004458 analytical method Methods 0.000 claims description 3
- 238000003795 desorption Methods 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 238000005485 electric heating Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 239000011259 mixed solution Substances 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 241000581364 Clinitrachus argentatus Species 0.000 claims 1
- 239000007789 gas Substances 0.000 description 55
- 230000008859 change Effects 0.000 description 5
- 239000002689 soil Substances 0.000 description 5
- 238000003860 storage Methods 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 description 4
- 230000009919 sequestration Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000013508 migration Methods 0.000 description 3
- 230000005012 migration Effects 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000000813 microbial effect Effects 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000029058 respiratory gaseous exchange Effects 0.000 description 2
- 239000002680 soil gas Substances 0.000 description 2
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 description 1
- -1 China petrochemical Substances 0.000 description 1
- BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 description 1
- QUWBSOKSBWAQER-UHFFFAOYSA-N [C].O=C=O Chemical compound [C].O=C=O QUWBSOKSBWAQER-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000020477 pH reduction Effects 0.000 description 1
- 230000008635 plant growth Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000010117 shenhua Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
Images
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
- E21B49/08—Obtaining fluid samples or testing fluids, in boreholes or wells
- E21B49/086—Withdrawing samples at the surface
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention particularly relates to a device and a method for monitoring leakage of a geological carbon dioxide sealing cover layer. A carbon dioxide geological sealing cover layer leakage monitoring device and method comprises a monitoring well, wherein a gas collecting port is arranged at the mouth of the monitoring well, and the monitoring well is positioned in a main stress concentration area of a cover layer, the cover layer, a reservoir crack development area, a high point position of a geological structure and a well site where a gas injection well is positioned; the carbon dioxide gas collecting device is connected with the gas collecting port and is used for collecting the carbon dioxide gas collected by the gas collecting port; carbon isotope used for carbon dioxide trapped in gas collection port without and after gas injection13C、12And an isotope mass analyzer for analyzing the C content. The method can accurately, timely and effectively find the upward leakage sign of the carbon dioxide breaking through the cover layer, and monitor the possible leakage path of the carbon dioxide in the reservoir, so that the carbon dioxide is not yet leakedAnd sending out safety early warning when the leakage is detected to the shallow ground surface.
Description
Technical Field
The invention relates to a carbon dioxide leakage monitoring method, in particular to a device and a method for monitoring leakage of a geological carbon dioxide sealing cover layer.
Background
Under the background of global climate change, geological storage and ocean storage of carbon dioxide are the most potential emission reduction measures at present. The Weyborn, Canada, the North Norway Selen Leprener (Sleipner) oil field, and the Sarahh, Aland Riya, operate three major carbon dioxide sequestration projects worldwide. The China Petroleum, China petrochemical, Shenhua group, Huaneng group and the extended Petroleum group in China also develop large-scale CCS demonstration projects respectively.
Carbon dioxide may leak to the shallow surface through cap rock capillary forces after geological sequestration and may also migrate to the shallow surface above the reservoir through faults and fracture zones. In addition, the walls of the injection well and the monitoring well may be diffused to the periphery.
When the carbon dioxide stored in the geology escapes to the shallow ground surface, the acidification of the soil and the replacement of oxygen in the soil can be caused, and further the vegetation ecosystem is influenced. High flows of carbon dioxide cause an increase in the carbon dioxide concentration in the soil gases, which can lead to limited respiration and even death of the plants. In addition, the environment with low pH value and high carbon dioxide concentration can promote mass propagation of part of organisms, and cause the other part of organisms to gradually shrink or even disappear due to the victory and the disadvantage of natural competition. The normal carbon dioxide content in soil gas should be maintained between 0.2% and 4%, and when the carbon dioxide content is increased to 5%, the carbon dioxide content will have adverse effect on the growth of plants. Contaminants that move with the escape of carbon dioxide can also affect groundwater quality.
The transport of the geological sequestered carbon dioxide may occur in both the horizontal and vertical directions. From the safety of sequestration, the diffusion of carbon dioxide in the horizontal direction causes the gas front to rush in, while migration in the vertical direction has a greater safety hazard. The larger the upward migration distance of the carbon dioxide is, the lower the safety of carbon dioxide sealing is, and the probability of leakage when the migration breaks through the cover layer is greatly enhanced. In conclusion, the sign that carbon dioxide breaks through the cover layer and leaks upwards is accurately and effectively found, possible leakage ways of the carbon dioxide in the reservoir are monitored, and it is very important to send out safety early warning when the carbon dioxide is not leaked to the shallow surface.
Monitoring in the traditional sense is usually based on difference comparison of carbon dioxide concentration and background value under shallow surface soil and atmospheric environment, but carbon dioxide has the possibility of being diluted in an actual measurement space, the measurement accuracy depends on the precision and error of a measuring instrument, and the leakage monitoring is lagged. Carbon dioxide can be released by plant respiration and microbial action in soil, and the air contains carbon dioxide which interferes with measurement, so that the methods cannot distinguish carbon dioxide in natural environment and seal leaked carbon dioxide, and the leakage is difficult to judge only according to concentration change.
In the earth surface deformation and environmental change remote sensing monitoring technology which is started in recent years, earth surface vegetation, ground features and terrain changes are monitored by monitoring reservoir stratum and cover layer geomechanical influence through a satellite-borne thermal infrared sensor and a low-altitude unmanned aerial vehicle thermal imager, potential leakage of pipelines and underground is identified, and remote sensing monitoring of carbon dioxide geological sequestration environmental change is achieved. A carbon dioxide monitoring scientific experiment satellite (carbon satellite) emitted by China carries a hyperspectral carbon dioxide detector to invert the atmospheric carbon dioxide concentration by measuring a carbon dioxide spectrum absorption line, the precision reaches 4ppm, and the atmospheric carbon dioxide concentration monitoring capability aiming at the whole world, China and other key areas is preliminarily formed. However, these techniques with huge investment are suitable for large-area large-scale three-dimensional long-term monitoring and strategic research, and it is necessary to research an economic and time-efficient carbon dioxide geological storage leakage monitoring method applicable to a region with a small storage capacity.
Wherein TEA is triethanolamine, MEA is monoethanolamine, BTB is bromothymol blue, which is called bromothymol blue and bromothymol blue.
Disclosure of Invention
Aiming at the problems, the invention provides a method for scientifically and reasonably deploying monitoring wells, efficiently capturing carbon dioxide gas samples by a chemical method and accurately analyzing delta by an isotope mass spectrometer13And C, accurately judging whether the carbon dioxide comes from the injected carbon dioxide, and monitoring whether the cover layer has a leakage sign, so that a safety early warning is sent to the leakage which is not transferred to the shallow ground surface.
The technical scheme of the invention is as follows:
a carbon dioxide geological storage cap layer leakage monitoring device comprises
The monitoring well is provided with a gas acquisition port at the wellhead and is positioned in a main stress concentration area of a cover layer, a crack development area of a reservoir stratum, a high point position of a geological structure and a well site where a gas injection well is positioned;
the carbon dioxide gas collecting device is connected with the gas collecting port and is used for collecting the carbon dioxide gas collected by the gas collecting port;
carbon isotope used for carbon dioxide trapped in gas collection port without and after gas injection13C、12And an isotope mass analyzer for analyzing the C content.
Preferably, if the sealing of reservoir geology is involved, the monitoring wells should also be deployed between injection and production wells, and also in the direction of carbon dioxide displacement.
The carbon dioxide gas trapping device comprises a gas sampling valve, a filtering device, a micro vacuum pump, an amine liquid trapping bottle and an acid-base indicating bottle which are sequentially connected; the gas collecting port is connected with a gas sampling valve.
The filter device is an anhydrous calcium chloride filter.
The inlet pipeline of the amine liquid trapping bottle is L-shaped and extends into the bottom in the amine liquid trapping bottle, the outlet pipeline is positioned at the bottle opening, and the outlet pipeline is provided with a one-way valve; a sieve plate parallel to the bottom of the amine liquid catching bottle is also arranged in the amine liquid catching bottle;
the inlet pipeline on the acid-base indicating bottle extends into the bottle bottom, the outlet pipeline is positioned at the bottle opening, and the outlet pipeline is provided with a one-way valve.
The amine liquid trapping bottle is also provided with a heating device which is an electric heating sleeve.
A method for monitoring leakage of a geological carbon dioxide sealing cover layer uses the device for monitoring leakage of the geological carbon dioxide sealing cover layer, and the monitoring process comprises the following steps:
(1) when gas is not injected, capturing carbon dioxide gas; carbon isotope in carbon dioxide trapped at gas collection port13C、12C content was analyzed as a reference value delta13C；
(2) After gas injection, capturing carbon dioxide gas; carbon isotope in carbon dioxide trapped at gas collection port13C′、12C' content is analyzed, and delta is calculated13C′；
(3) And setting a value range of η, if η falls within the set value range, indicating that the carbon dioxide is not leaked, otherwise, indicating that the carbon dioxide is leaked.
The specific process of capturing the carbon dioxide gas comprises the following steps: starting a micro vacuum pump, and extracting a carbon dioxide gas sample leaked through a gas collection port; the carbon dioxide gas sample passes through the amine liquid capturing bottle, and the carbon dioxide gas sample is dissolved in the amine liquid capturing bottle in a large amount; and (4) turning off the micro vacuum pump to stop trapping until the acid-base indicator in the acid-base indicator bottle turns blue, green and yellow again.
Further comprising: and heating the amine liquid trapping bottle dissolved with the carbon dioxide gas sample to 100 ℃ for desorption until the acid-base indicator in the acid-base indicator bottle changes from yellow to green and then changes to blue.
The liquid in the amine liquid trapping bottle is a mixed solution of TEA and MEA, and the mixing molar ratio is 2: 1;
the BTB solution is arranged in the acid-base indicating bottle and is used as an acid-base indicator, and the preparation method of the BTB solution is as follows: 1g of bromothymol blue is added to 1L of a 20% alcoholic solution.
The invention has the technical effects that:
1. the sign that carbon dioxide breaks through the cover layer and leaks upwards is accurately, timely and effectively found, possible leakage ways of the carbon dioxide in the reservoir are monitored, and safety early warning is given out when the carbon dioxide is not leaked to the shallow surface;
2. the chemical absorption method for capturing the carbon dioxide is beneficial to storing and transporting carbon dioxide gas samples with large capacity and long time. The traditional carbon dioxide analysis method is that the air bag is taken on site and then transported back to a laboratory for analysis. The amine liquid capturing bottle is used for capturing carbon dioxide by a high-capacity chemical method, so that the adverse effects of carbon dioxide component and concentration change caused by the sealing property of the air bag and improper manual operation are overcome;
3. according to the uniqueness of the carbon dioxide carbon isotope ratio in the nature (atmosphere and soil) of the carbon dioxide (coal chemical industry, petrochemical industry and mining industry) in the injected gas, the source of the carbon dioxide can be accurately judged.
Drawings
Fig. 1 is a schematic diagram of the principle of the present invention.
Fig. 2 is a schematic view of monitoring well deployment.
FIG. 3 is a schematic view of a carbon dioxide gas capturing device.
FIG. 4 is a diagram illustrating a specific monitoring result according to the present invention.
Reference numerals: 1-a monitoring well, 2-a gas collecting port, 3-a filtering device, 4-a micro vacuum pump, 5-an amine liquid trapping bottle, 6-an acid-base indicating bottle and 7-a gas sampling valve.
Detailed Description
Example 1
A carbon dioxide geological cap leak monitoring device comprising:
the monitoring well 1 is characterized in that a gas collecting port 2 is arranged at the well mouth of the monitoring well 1, and the monitoring well 1 is positioned in a main stress concentration area of a cover layer, a reservoir crack development area, a high point position of a geological structure and a well site where a gas injection well is positioned;
a carbon dioxide gas collecting device which is connected with the gas collecting port 2 and collects the carbon dioxide gas collected by the gas collecting port 2;
for carbon isotopes in carbon dioxide trapped in the gas collection port 2 before and after gas injection13C、12And an isotope mass analyzer for analyzing the C content.
The specific implementation process of the embodiment is as follows:
(1) when gas is not injected, capturing carbon dioxide gas; carbon isotope in carbon dioxide trapped in the gas collection port 213C、12C content was analyzed as a reference value delta13C；
(2) After gas injection, capturing carbon dioxide gas; carbon isotope in carbon dioxide trapped in the gas collection port 213C′、12C' content is analyzed, and delta is calculated13C′；
(3) And setting a value range of η, if η falls within the set value range, indicating that the carbon dioxide is not leaked, otherwise, indicating that the carbon dioxide is leaked.
The specific process of capturing the carbon dioxide gas comprises the following steps: starting the micro vacuum pump 4, and extracting the carbon dioxide gas sample leaked through the gas collection port 2; the carbon dioxide gas sample passes through the amine liquid capturing bottle 6, and the carbon dioxide gas sample is dissolved in the amine liquid capturing bottle 6 in a large amount; until the acid-base indicator in the bottle 6 turns blue-green and yellow again, the micro vacuum pump 4 is turned off to stop trapping.
Example 2
On the basis of embodiment 1, the method further comprises the following steps:
if the sealing of the reservoir geology is involved, the monitoring well 1 should also be deployed between injection and production wells and also along the carbon dioxide displacement direction. The carbon dioxide gas trapping device comprises a gas sampling valve 7, a filtering device 3, a micro vacuum pump 4, an amine liquid trapping bottle 6 and an acid-base indicating bottle 6 which are connected in sequence; the gas collection port 2 is connected to a gas sampling valve 7. The filtering device 3 is an anhydrous calcium chloride filter. The inlet pipeline of the amine liquid trapping bottle 6 is L-shaped and extends into the bottom in the amine liquid trapping bottle 6, the outlet pipeline is positioned at the bottle mouth, and the outlet pipeline is provided with a one-way valve; a sieve plate parallel to the bottom of the amine liquid trapping bottle 6 is also arranged in the amine liquid trapping bottle 6; the inlet pipeline on the acid-base indicating bottle 6 extends into the bottle bottom, the outlet pipeline is positioned at the bottle opening, and the outlet pipeline is provided with a one-way valve. The amine liquid trapping bottle 6 is also provided with a heating device which is an electric heating sleeve. Heating an amine liquid trapping bottle 6 (amine-rich liquid) dissolved with a carbon dioxide gas sample to 100 ℃ for desorption until an acid-base indicator in an acid-base indicator bottle 6 changes from yellow to green and then changes to blue; and forming the lean amine liquid, wherein the desorbed lean amine liquid can be recycled. The amine liquid trapping bottle 6 is filled with a mixed solution of TEA and MEA, and the mixing molar ratio is 2: 1; the BTB solution is arranged in the acid-base indicating bottle 6 and is used as an acid-base indicator, and the preparation method of the BTB solution is as follows: 1g of bromothymol blue is added to 1L of a 20% alcoholic solution.
Example monitoring results:
if a block is injected with carbon dioxide captured by the coal chemical industry, the monitoring results are shown in FIG. 4. The monitoring result of the monitoring point 1 is in the set value range, which indicates that no leakage occurs. The monitoring result of the monitoring point 2 does not fall within the set value range and shows a deviation trend, which indicates that carbon dioxide generated by strong microbial decomposition or methane oxidation and the like exists underground. The monitoring result of the monitoring point 3 does not fall within the set value range and the deviation trend is delayed, which indicates that the cover layer has the possibility of leakage and needs to be monitored in an encrypted manner.
Claims (10)
1. The utility model provides a monitoring devices is revealed to carbon dioxide geological sealing cap layer which characterized in that: comprises that
The monitoring well comprises a monitoring well (1), wherein a well mouth of the monitoring well (1) is provided with a gas collecting port (2), and the monitoring well (1) is positioned in a main stress concentration area of a cover layer, the cover layer, a reservoir crack development area, a high point position of a geological structure and a well site where a gas injection well is positioned;
the carbon dioxide gas collecting device is connected with the gas collecting port (2) and is used for collecting the carbon dioxide gas collected by the gas collecting port (2);
for carbon isotopes in carbon dioxide trapped in the gas collection port (2) without and after gas injection13C、12And an isotope mass analyzer for analyzing the C content.
2. The carbon dioxide geological sealing cap leak monitoring device of claim 1, characterized in that: if the reservoir geology is involved in the sealing, the monitoring well (1) should be deployed between injection and production wells and also in the direction of carbon dioxide displacement.
3. The carbon dioxide geological sealing cap leak monitoring device of claim 2, characterized in that: the carbon dioxide gas trapping device comprises a gas sampling valve (7), a filtering device (3), a micro vacuum pump (4), an amine liquid trapping bottle (5) and an acid-base indicating bottle (6) which are connected in sequence; the gas collecting port (2) is connected with a gas sampling valve (7).
4. The carbon dioxide geological sealing cap leak monitoring device of claim 3, characterized in that: the filtering device (3) is an anhydrous calcium chloride filter.
5. The carbon dioxide geological sealing cap leak monitoring device of claim 4, characterized in that:
an inlet pipeline of the amine liquid trapping bottle (5) is L-shaped and extends into the bottom in the amine liquid trapping bottle (5), an outlet pipeline is positioned at the bottle mouth, and a one-way valve is arranged on the outlet pipeline; a sieve plate which is parallel to the bottom of the amine liquid catching bottle (5) is also arranged in the amine liquid catching bottle (5);
an inlet pipeline on the acid-base indicating bottle (6) extends into the bottle bottom, an outlet pipeline is positioned at the bottle opening, and a one-way valve is arranged on the outlet pipeline.
6. The carbon dioxide geological sealing cap leak monitoring device of claim 5, characterized in that: the amine liquid trapping bottle (5) is also provided with a heating device which is an electric heating sleeve.
7. A method for monitoring leakage of a geological carbon dioxide sealing cover layer is characterized by comprising the following steps: the carbon dioxide geological sealing cap leakage monitoring device of claim 1 is used, and the monitoring process is as follows:
(1) when gas is not injected, capturing carbon dioxide gas; carbon isotope in carbon dioxide trapped in the gas collection port (2)13C、12C content was analyzed as a reference value delta13C；
(2) After gas injection, capturing carbon dioxide gas; carbon isotope in carbon dioxide trapped in the gas collection port (2)13C′、12Content of CLine analysis, calculating delta13C′；
(3) And setting a value range of η, if η falls within the set value range, indicating that the carbon dioxide is not leaked, otherwise, indicating that the carbon dioxide is leaked.
8. The method of monitoring leakage from a geological carbon dioxide cap as claimed in claim 7, wherein: the specific process of capturing the carbon dioxide gas comprises the following steps: starting a micro vacuum pump (4) to extract a carbon dioxide gas sample leaked through the gas collection port (2); the carbon dioxide gas sample passes through the amine liquid capturing bottle (5), and the carbon dioxide gas sample is dissolved in the amine liquid capturing bottle (5) in a large amount; until the acid-base indicator in the acid-base indicator bottle (6) turns blue, green and yellow again, the micro vacuum pump (4) is closed to stop trapping.
9. The method of monitoring leakage from a geological carbon dioxide cap as claimed in claim 8, wherein: further comprising: and heating the amine liquid trapping bottle (5) dissolved with the carbon dioxide gas sample to 100 ℃ for desorption until the acid-base indicator in the acid-base indicator bottle (6) changes from yellow to green and then to blue.
10. The method of monitoring leakage from a geological carbon dioxide cap as claimed in claim 9, wherein:
the liquid in the amine liquid trapping bottle (5) is a mixed solution of TEA and MEA, and the mixing molar ratio is 2: 1;
BTB solution is arranged in the acid-base indicating bottle (6) and is used as an acid-base indicator, and the preparation method of the BTB solution is as follows: 1g of bromothymol blue was added to 1L of 20% alcoholic solution.
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Cited By (8)
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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 |
| CN112761599A (en) * | 2021-02-08 | 2021-05-07 | 西南石油大学 | Based on CO2Captured authigenic CO2Method for increasing crude oil recovery ratio |
| CN113062712A (en) * | 2021-04-13 | 2021-07-02 | 太原理工大学 | Deep stratum CO sequestration2Biological anti-dissipation method |
| CN114563820A (en) * | 2022-03-07 | 2022-05-31 | 中国矿业大学(北京) | Geophysical monitoring method, device and system |
| CN115822534A (en) * | 2022-12-08 | 2023-03-21 | 陕西延长石油（集团）有限责任公司 | Injection well screening method for preventing carbon dioxide from channeling and leaking along cement sheath |
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| CN117079533A (en) * | 2023-10-16 | 2023-11-17 | 中国石油大学(华东) | CO accounting for reservoir stress time-varying effects 2 Experimental device for water layer buries |
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