CN-121994999-A - Carbon dioxide geological sequestration leakage monitoring device and method

Abstract

The invention relates to a carbon dioxide geological storage leakage monitoring device and a method, wherein the monitoring device comprises a bottom plate, a lifting assembly, a monitoring assembly and a collecting assembly, the lifting assembly is provided with a spiral drilling tool, the spiral drilling tool can downwards move through a through hole in the bottom plate and drill the ground, three gas collecting cavities are partitioned in the monitoring assembly, an air inlet hole is formed in each gas collecting cavity, a monitoring element for monitoring carbon dioxide in each gas collecting cavity is arranged at the air inlet hole, the collecting assembly is provided with an air pump, the air inlet of the air pump is respectively connected with a first collecting end, a second collecting end and a third collecting end, the air outlet of the air pump is respectively connected with the three gas collecting cavities in an on-off mode, the third collecting end collects underground gas of a carbon dioxide storage area, the first collecting end collects ground gas of the carbon dioxide storage area, and the second collecting end collects ground air of the carbon dioxide storage area. The invention solves the technical problem of inaccurate monitoring of carbon dioxide geological storage leakage.

Inventors

• XIAO JINGWEN
• HUANG LINGLING
• Han Linxu
• YU QINGXIU
• LIU KUN
• Gou qian

Assignees

• 中国石油天然气股份有限公司

Dates

Publication Date

20260508

Application Date

20241108

Claims (16)

1. 1. A carbon dioxide geological sequestration leakage monitoring device, characterized in that it comprises: the bottom plate is provided with at least one through hole; the lifting assembly is arranged on the bottom plate and is provided with a spiral drilling tool, the spiral drilling tool is positioned above the through hole, and the spiral drilling tool can downwards move through the through hole and drill holes on the ground; the monitoring assembly is internally divided into three gas collection cavities, the gas collection cavities are provided with gas inlets, and monitoring elements for monitoring carbon dioxide in the gas collection cavities are arranged at the gas inlets; The collecting assembly is provided with an air extracting pump, an air inlet of the air extracting pump is connected with a first collecting end, a second collecting end and a third collecting end respectively, an air outlet of the air extracting pump is connected with three air inlets on the air collecting cavity in an on-off mode respectively, the third collecting end, the first collecting end and the second collecting end are sequentially raised in vertical height, the first collecting end and the second collecting end are located above the bottom plate, the third collecting end penetrates through the bottom plate and stretches into the drilling hole so as to collect underground gas in a carbon dioxide sealing area through the third collecting end, and collect ground gas in the carbon dioxide sealing area through the first collecting end and collect ground air in the carbon dioxide sealing area through the second collecting end.
2. 2. The carbon dioxide geological sequestration leakage monitoring device according to claim 1, wherein the lifting assembly comprises a first mounting plate and a plurality of first threaded rods vertically arranged, the first threaded rods are positioned above the bottom plate, the bottom ends of the first threaded rods are respectively connected with the bottom plate, the first mounting plate is provided with a plurality of first threaded holes, and the first mounting plate is penetrated on the corresponding first threaded rods through the first threaded holes; The screw drilling machine is characterized in that a first motor is arranged on the top surface of the first mounting plate, a screw drilling tool is arranged below the first mounting plate, an output shaft of the first motor penetrates through the first mounting plate and is connected with the top of the screw drilling tool, the output shaft of the first motor is connected with the first threaded rod through a transmission assembly, and the first motor drives the screw drilling tool to rotate and simultaneously drives the first mounting plate and the screw drilling tool to synchronously lift along the first threaded rod through transmission assembly.
3. 3. The carbon dioxide geological sequestration leakage monitoring device of claim 2, wherein the transmission assembly comprises a driving gear and a driven gear, the driving gear is fixedly sleeved on the output shaft of the first motor, the driven gear is provided with a second threaded hole, the driven gear is sleeved on the first threaded rod through the second threaded hole, and teeth on the driving gear are meshed with teeth on the driven gear.
4. 4. The carbon dioxide geological sequestration leakage monitoring device of claim 3, wherein a stopper is provided at the top end of the first threaded rod, and the stopper is used for limiting the upward displacement of the driven gear on the first threaded rod.
5. 5. The carbon dioxide geological sequestration leakage monitoring device of claim 2, wherein the lifting assembly further comprises a supporting vertical plate vertically arranged above the bottom plate, the bottom of the supporting vertical plate is connected with the top surface of the bottom plate, a first sliding groove extending vertically is formed in the surface of the supporting vertical plate facing to one side of the first mounting plate, and a sliding block opposite to the first sliding groove is arranged on the first mounting plate and can be slidably embedded in the first sliding groove.
6. 6. The carbon dioxide geological sequestration leak monitoring device of claim 1, wherein a mobile assembly for position adjustment of the monitoring assembly and the collection assembly is provided on the top surface of the base plate; The movable assembly comprises two linear sliding table modules, two vertically arranged support columns and a support plate, wherein the two linear sliding table modules are arranged on the top surface of the bottom plate and are parallel to each other, the support plate is positioned between the two support columns, second sliding grooves are respectively formed in the opposite side walls of the linear sliding table modules along the respective extending directions, the bottom ends of the two support columns are respectively embedded in the corresponding second sliding grooves in a sliding manner, and the edges of the two opposite sides of the support plate are respectively connected with the two support columns in a vertically movable manner.
7. 7. The carbon dioxide geological sequestration leakage monitoring device according to claim 6, wherein the opposite side walls of the two support columns are respectively provided with a third chute along the respective extending direction; Every in the third spout and along vertical second threaded rod and the guide bar of being provided with respectively, the top of support column is provided with the second motor, the output shaft of second motor with the top of second threaded rod is connected, the backup pad sets up along the horizontal direction, and is provided with the lug on the opposite side edge of backup pad respectively, have third screw hole and guiding hole on the lug, the lug passes through the third screw hole wears to locate the second threaded rod, just the lug passes through the guiding hole wears to locate on the guide bar.
8. 8. The carbon dioxide geological sequestration leakage monitoring device of claim 1, wherein the monitoring element is positioned below the air inlet hole, the monitoring element comprises a second mounting plate, an air bag, a carbon dioxide monitor and a plurality of telescopic rods, the carbon dioxide monitor is arranged on the bottom surface of the second mounting plate, so that the carbon dioxide monitor can be positioned in the air collecting cavity; The telescopic rods and the air bags are arranged on the top surface of the second mounting plate, the bottom ends of the telescopic rods are connected with the top surface of the second mounting plate, the top ends of the telescopic rods are connected with the inner wall of the top of the air collection cavity close to the air inlet hole, the air bags are opposite to the air inlet hole in the vertical direction, when the telescopic rods are in an extending state, the air bags are blocked in the air inlet hole, and when the telescopic rods are in a contracting state, the air bags are positioned below the air inlet hole, and the air inlet hole is communicated with the air collection cavity.
9. 9. The carbon dioxide geological sequestration leak monitoring device of claim 1 or 8, wherein the monitoring assembly comprises a display screen, an alarm and an indicator light.
10. 10. The carbon dioxide geological sequestration leakage monitoring device according to claim 1 or 8, characterized in that the monitoring assembly is provided with a human-computer interaction system comprising: the data acquisition module is used for acquiring preset carbon dioxide parameters in the underground gas, the ground gas and the ground air in the carbon dioxide sealing area and real-time monitored carbon dioxide parameters in the underground gas, the ground gas and the ground air in the carbon dioxide sealing area, wherein the carbon dioxide parameters comprise a pressure value of carbon dioxide and a concentration value of carbon dioxide; The model building module is used for building a function relationship between a preset pressure value of carbon dioxide and a preset concentration value of carbon dioxide to form a mathematical calculation model; The data calculation module is used for guiding the comparison difference value between the actually monitored pressure value of the carbon dioxide and the concentration value of the carbon dioxide into the mathematical calculation model to obtain the leakage quantity of the carbon dioxide, and obtaining the leakage rate of the carbon dioxide in combination with the monitoring time; The monitoring and early warning module is used for judging the geological sequestration leakage of the carbon dioxide according to the leakage rate of the carbon dioxide obtained by the data calculation module and early warning according to an abnormal judgment result; and the display module is used for displaying the monitored and calculated data.
11. 11. The carbon dioxide geological sequestration leakage monitoring device of claim 1, wherein the air inlet of the air pump is connected with a first four-way joint, and the other three interfaces of the first four-way joint are respectively connected with the first collecting end, the second collecting end and the third collecting end through a first air extraction pipe, a second air extraction pipe 708 and a third air extraction pipe; the air outlet of aspiration pump links to each other with the second cross connection, other three interfaces of second cross connection pass through first outlet duct, second outlet duct and third outlet duct respectively with three the gas collection chamber links to each other, first outlet duct the second outlet duct with be provided with the on-off valve on the third outlet duct respectively.
12. 12. The carbon dioxide geological sequestration leakage monitoring device according to claim 11, wherein at least part of the first air extraction pipe and at least part of the second air extraction pipe extend along the direction parallel to the top surface of the bottom plate, supporting rods are respectively arranged below the first air extraction pipe and the second air extraction pipe, the top ends of the two supporting rods are respectively connected with the first air extraction pipe and the second air extraction pipe, and the bottom ends of the two supporting rods respectively prop against the top surface of the bottom plate.
13. 13. The carbon dioxide geological sequestration leak monitoring device of claim 11, wherein said second collection end is upwardly open and/or said third collection end is downwardly open.
14. 14. The carbon dioxide geological sequestration leak monitoring device of claim 1, wherein a plurality of legs are provided on the bottom surface of the base plate, a plurality of the legs being used to support the base plate on the ground of the carbon dioxide sequestration zone.
15. 15. A carbon dioxide geological sequestration leakage monitoring method for monitoring the carbon dioxide leakage of a carbon dioxide sequestration area using the carbon dioxide geological sequestration leakage monitoring device according to any one of claims 1 to 13, characterized in that it comprises the following steps: Step S1, placing the carbon dioxide geological sequestration leakage monitoring device in the carbon dioxide sequestration area to be monitored, and presetting the pressure value of carbon dioxide and the concentration value of carbon dioxide in underground gas, ground gas and air on the ground in the carbon dioxide sequestration area; S2, driving a spiral drilling tool on the lifting assembly to move downwards through the lifting assembly, so that the spiral drilling tool penetrates through a through hole in the bottom plate and then drills holes in the ground; Step S3, driving a spiral drilling tool on the lifting assembly to move upwards through the lifting assembly, and then adjusting the positions of the monitoring assembly and the collecting assembly through the moving assembly until a third collecting end in the collecting assembly is connected with a through hole on the bottom plate; s4, collecting underground gas, ground gas and air on the ground of the carbon dioxide sealing area through the third collecting end, the first collecting end and the second collecting end respectively, and storing the underground gas, the ground gas and the air on the ground in three air collecting cavities in the monitoring assembly respectively; S5, after the gas in the three gas collection cavities is collected, controlling the air bags in the monitoring elements to block the corresponding air inlets on the monitoring components, and monitoring carbon dioxide in the gas collection cavities through a carbon dioxide monitor on the monitoring elements; and S6, obtaining the leakage rate of the carbon dioxide.
16. 16. The method for monitoring carbon dioxide geological storage leakage according to claim 15, wherein in step S6, the data monitored by the carbon dioxide monitor and received by the man-machine interaction system are analyzed and judged, the monitored data and the judgment result are displayed by the display screen, and the corresponding indicator lamp is controlled to carry out lamplight reminding according to the judgment result, and the alarm is controlled to alarm.

Description

Carbon dioxide geological sequestration leakage monitoring device and method Technical Field The invention relates to the field of geological monitoring, in particular to a device and a method for monitoring carbon dioxide geological storage leakage. Background With the development of industry, greenhouse gases with strong heat absorption such as carbon dioxide emitted from human beings to the atmosphere are increased year by year, and the greenhouse effect of the atmosphere is also enhanced, so that the problems about emission reduction and carbon dioxide fixation in the atmosphere are urgent. The Chinese patent with the publication number of CN217587117U discloses a monitoring device for geological sequestration leakage of carbon dioxide, which comprises a sample carbon dioxide monitoring device and a sample collecting and processing device, wherein a baffle is arranged in a portable monitoring box on the sample carbon dioxide monitoring device, a cooling box is arranged on the left side of the baffle, a carbon dioxide monitor is arranged on the right side of the baffle, a man-machine interaction system is arranged on the front side of the portable monitoring box, and the sample collecting and processing device is arranged on the left side of the sample carbon dioxide monitoring device. This monitoring devices that carbon dioxide geological sequestration leaked, when the carbon dioxide content exceeded the default of controller, report to the police through the alarm on the portable monitoring case, warn monitoring personnel, the result of monitoring simultaneously can show on human-computer interaction system, realizes whether leaking the regional carbon dioxide of target takes place to monitor. In the above patent and the prior art, only carbon dioxide at one location can be monitored in the actual use process, but because the carbon dioxide concentration in the ground, underground and air above the same location is not the same, monitoring only one location easily results in inaccurate monitoring data, and therefore, the requirement of accurately monitoring the leakage amount of carbon dioxide cannot be met. Therefore, the inventor provides a device and a method for monitoring geological carbon dioxide seal leakage by virtue of experience and practice of related industries for many years, so as to overcome the defects of the prior art. Disclosure of Invention The invention aims to provide a carbon dioxide geological storage leakage monitoring device and method, which can ensure the accuracy of monitoring the leakage amount of carbon dioxide, timely know abnormal leakage points, realize detection of multiple concentrations and multiple position ranges, meet the requirement of geological storage leakage monitoring, and accurately know the leakage condition of geological storage dioxide according to the monitored data so as to carry out targeted treatment. The object of the invention can be achieved by the following scheme: the invention provides a carbon dioxide geological sequestration leakage monitoring device, which comprises: the bottom plate is provided with at least one through hole; the lifting assembly is arranged on the bottom plate and is provided with a spiral drilling tool, the spiral drilling tool is positioned above the through hole, and the spiral drilling tool can downwards move through the through hole and drill holes on the ground; the monitoring assembly is internally divided into three gas collection cavities, the gas collection cavities are provided with gas inlets, and monitoring elements for monitoring carbon dioxide in the gas collection cavities are arranged at the gas inlets; The collecting assembly is provided with an air extracting pump, an air inlet of the air extracting pump is connected with a first collecting end, a second collecting end and a third collecting end respectively, an air outlet of the air extracting pump is connected with three air inlets on the air collecting cavity in an on-off mode respectively, the third collecting end, the first collecting end and the second collecting end are sequentially raised in vertical height, the first collecting end and the second collecting end are located above the bottom plate, the third collecting end penetrates through the bottom plate and stretches into the drilling hole so as to collect underground gas in a carbon dioxide sealing area through the third collecting end, and collect ground gas in the carbon dioxide sealing area through the first collecting end and collect ground air in the carbon dioxide sealing area through the second collecting end. In a preferred embodiment of the present invention, the lifting assembly includes a first mounting plate and a plurality of first threaded rods vertically arranged, the plurality of first threaded rods are located above the bottom plate, bottom ends of the plurality of first threaded rods are respectively connected with the bottom plate, the first mounting plate is provided with