CN110761751B - Aeration zone soil multi-point gas collection device with background comparison function - Google Patents
Aeration zone soil multi-point gas collection device with background comparison function Download PDFInfo
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- CN110761751B CN110761751B CN201910894974.1A CN201910894974A CN110761751B CN 110761751 B CN110761751 B CN 110761751B CN 201910894974 A CN201910894974 A CN 201910894974A CN 110761751 B CN110761751 B CN 110761751B
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- gas
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- comparison function
- gas collection
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/164—Injecting CO2 or carbonated water
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
- E21B43/121—Lifting well fluids
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/24—Suction devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/24—Earth materials
Abstract
The invention discloses a gas-coated belt soil multipoint gas collecting device with a background comparison function, which comprises a fixing ring, wherein a driving ring is arranged in the fixing ring, a servo motor is arranged in the driving ring, the servo motor is connected with the fixing ring for driving, multipoint gas collecting devices are respectively arranged on the outer side of the fixing ring and the driving ring, and the multipoint gas collecting devices can realize the change between a sample monitoring state and a reference correction state. The invention can quickly and conveniently realize the measurement of the carbon dioxide flux of soil layers with different depths at the same position and the same depth at different positions, and the measurement result has the advantages of small deviation of the monitoring result, high precision and the like.
Description
Technical Field
The invention belongs to the technical field of environmental monitoring, and particularly relates to a gas-coated zone soil multi-point gas collecting device with a background comparison function.
Background
Carbon dioxide gas drive enhanced oil recovery (CO)2EOR) technology is to utilize the characteristic that carbon dioxide has higher solubility in both oil and water to remove high-purity CO2Gas utilizationInjecting the mixture into oil layer to extract C from crude oil20The following light components are gasified, so that a mixed phase is formed in the stratum quickly, the swept volume is enlarged in the mixed phase section, more stratum oil is driven, and the recovery ratio of crude oil can be effectively improved. CO22EOR will generate a large amount of CO2Sealed underground, the process may have two types of leaks:
one is sudden leaks, such as those caused by injector well fracturing or leaks through waste wells and CO2Breakthrough of oil layer due to gas channeling, etc.;
the second is slow leakage, i.e., leakage through faults, broken or leaking wells, etc.
CO leaking into the atmosphere2May affect the ecological environment around the well site and threatens the personal safety of the first-line production staff in oil field, so as to monitor the release flux of carbon dioxide in the soil in the well site aeration zone, provide basic data for the environmental ecological effect and risk evaluation of the carbon dioxide gas-driven oil production block and simultaneously provide basic data for CO gas-driven oil production block2And the leakage risk of oil displacement sealing is early-warned, so that powerful support is provided for the safety production of the oil field.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a multi-point gas collecting device for aeration zone soil with background comparison function, which is used for measuring and recording the flux of carbon dioxide in multi-point soil at the same time by arranging a multi-way control valve capable of being freely switched and connecting a plurality of dynamic gas collecting columns; the background contrast passage and the dynamic gas production passage can be switched in real time, and the background gas flux correction of the multi-point gas production column is rapidly realized.
The invention adopts the following technical scheme:
the utility model provides a gas bag area soil multiple spot gas collection system with function is compared to background, includes solid fixed ring, is provided with the initiative ring in the solid fixed ring, is provided with servo motor in the initiative ring, and servo motor is connected with solid fixed ring and is used for the drive, is provided with the multiple spot position gas collection system respectively on solid fixed ring's the outside and the initiative ring, and the multiple spot position gas collection system can realize changing between sample monitoring state and the reference correction state.
Specifically, gaseous collection system of multiple spot position includes gas production pipeline interface and suction pipeline interface, and gas production pipeline interface includes a plurality ofly, evenly sets up in solid fixed ring's the outside, and gas production pipeline interface is connected with the initiative ring through inhaling the passageway, and the gas production pipeline interface includes a plurality ofly, and evenly distributed is connected on the upper portion of initiative ring with the one end of inhaling the passageway.
Furthermore, the number of the gas production pipeline interfaces comprises six, the six gas production pipeline interfaces are respectively connected with the driving ring through corresponding gas suction passages, the number of the gas suction pipeline interfaces comprises three, and the gas suction pipeline interfaces are arranged at one ends of the three gas suction passages at intervals.
Specifically, a sealing ring is arranged between the fixing ring and the driving ring.
Furthermore, the sealing ring adopts a compressed polytetrafluoroethylene annular sealing gasket.
Concretely, the bottom of the inner side of the fixing ring is provided with driven insections, and the servo motor is meshed and connected with the driven insections through a gear torque amplifier.
Furthermore, the insection arc length of the driven insection is 60-80 degrees of the outer diameter of the driving ring.
Furthermore, two ends of the driven insection are provided with limiting devices capable of controlling the positive and negative rotation output of the servo motor.
Compared with the prior art, the invention has at least the following beneficial effects:
the multi-point gas collecting device for the aeration zone soil with the background comparison function can quickly realize CO in the multi-point soil by switching between the monitoring state and the reference correction state2Flux monitoring can also realize the CO of soil with different depths in the same region2Simultaneous measurement of flux.
Furthermore, the purpose that the multi-point position gas acquisition device is arranged is that different gas acquisition columns and detection devices are conveniently and quickly connected, meanwhile, the monitoring state and the reference correction state are switched through the active rotation of the gas acquisition device, and the simple and convenient realization of CO in the multi-point position soil2Monitoring flux, or measuring different depths of the same regionSoil CO degree2Flux.
Further, the arrangement of the sealing ring enables the fixing ring and the suction passage in the driving ring to be sealed at the connection position without leakage.
Furthermore, when the servo motor acts, the driven insection drives the driving ring to rotate under the driving action of the gear torque amplifier, so that the whole device is switched from a monitoring state to a reference correction state.
Furthermore, the maximum rotation angle of the fixing ring and the driving ring in the device can be controlled by the arrangement of the arc length of the insection.
Furthermore, the limiting device is arranged to ensure that the air suction passage connecting the gas production pipeline interface on the fixing ring and the air suction pipeline interface on the driving ring can be accurately connected.
In conclusion, the invention can rapidly and conveniently realize the measurement of the carbon dioxide flux of soil layers with different depths at the same position and the same depth at different positions, and the measurement result has the advantages of small deviation of the monitoring result, high precision and the like.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
FIG. 1 is a diagram of a sample monitoring state of a gas collection device;
FIG. 2 is a diagram of a reference calibration state of the gas collection assembly;
FIG. 3 is a diagram of a gas flux detection system for soil layers at different point locations and the same depth;
FIG. 4 is a diagram of a system for detecting gas flux in soil layers at different depths at the same point location;
FIG. 5 is a top view of the gas production apparatus of the present invention;
fig. 6 is a cross-sectional view of the gas production apparatus of the present invention.
Wherein: 1. a fixing ring; 2. a seal ring; 3. a driving ring; 4. a gas production line interface; 5. an air intake passage; 6. an air suction pipeline interface; 7. driven insection; 8. a gear torque amplifier; 9. a servo motor.
Detailed Description
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "one side", "one end", "one side", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The invention provides a gas-coated zone soil multi-point gas collecting device with a background comparison function, which is characterized in that a plurality of dynamic gas collecting columns are connected by arranging a multi-way control valve capable of being freely switched, and the carbon dioxide flux of multi-point soil can be measured and recorded simultaneously; the background contrast passage and the dynamic gas production passage can be switched in real time, and the background gas flux correction of the multi-point gas production column can be quickly completed; the synchronous monitoring and comparison of the carbon dioxide flux of the soil in the gas-encapsulated zone at different point positions and different stratum depths of the gas injection and oil displacement well site are realized. The invention has the advantages of small deviation of monitoring results, high precision and the like, and can realize the measurement of the carbon dioxide flux of soil layers with different depths. And a powerful monitoring technical support is provided for early warning of the risk of carbon dioxide leakage.
Referring to fig. 5 and 6, the multi-point gas collecting device for the aeration zone soil with the background comparison function of the present invention includes a fixing ring 1, a sealing ring 2, a driving ring 3, a multi-point gas collecting device and a servo motor 9, wherein the driving ring 3 is disposed in the fixing ring 1, the sealing ring 2 is sandwiched between the driving ring 3 and the fixing ring 1, the bottom of the inner side of the fixing ring 1 is provided with a driven insection 7, the servo motor 9 is installed in the inner cavity of the driving ring 3, the servo motor driving force is transmitted through the driven insection 7, and the multi-point gas collecting device can realize that the gas collecting device rapidly changes between a sample monitoring state and a reference correction state.
The multipoint gas collecting device comprises gas production pipeline interfaces 4, a gas suction passage 5 and gas suction pipeline interfaces 6, six gas production pipeline interfaces 4 are uniformly arranged on the outer side of a fixing ring 1, three gas suction pipeline interfaces 6 and gas suction passages 5 are uniformly distributed on the upper portion of a driving ring 3, and the three gas suction pipeline interfaces 6, the gas suction passages 5 and the six gas production pipeline interfaces 4 are switched and combined.
The sealing ring 2 is a compressed polytetrafluoroethylene annular sealing gasket.
The insection arc length of the driven insection 7 is 60-80 degrees of the outer diameter of the driving ring, and limiting devices are arranged on two sides and used for judging and controlling the action of the servo motor 9.
The gear of the gear torsion amplifier 8 is tightly meshed with the driven insection 7 and is used for driving the driving ring 3 to rotate, so that the relative position between the driving ring 3 and the fixed ring 1 is changed, and the switching between the sample monitoring state and the reference correction state is realized.
The servo motor 9 can run in positive and negative rotation, and the positive and negative rotation output of the servo motor is controlled by limiting devices at two ends of the driven insection.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 and 2, the multi-point gas collecting device can rapidly realize CO in the multi-point soil by switching between the monitoring state and the reference correcting state2Flux monitoring can also realize the CO of soil with different depths in the same region2Simultaneous measurement of flux.
Example (b):
referring to fig. 3 and 4, a sampling plane is defined at sampling well site points (different depths at the same point and different depths at the same point) where the flux of soil CO2 needs to be monitored, and the surface of the sampling point is cleared by 20 cm; the undisturbed soil sampler is utilized to vertically and downwards open the soil in the sampling plane to reach different target depths (the same depth is-1.5 m, for example; different depths are-0.5 m, -1.5m and-2.5 m, for example), and then the sampler is quickly inserted into the hole.
Connecting gas collecting hood sampling pipes of the three groups of gas collectors with corresponding monitoring points on a multi-point gas collecting device fixing ring respectively, and connecting reference air pipes of the gas collectors and reference air regulating valves to reference air corresponding points on the multi-point gas collecting device fixing ring; and then the interface of the driving ring of the multi-point position gas collecting device is connected with a gas collecting pump, and the collected sample gas or reference air is conveyed to subsequent detection equipment.
After the soil layer gas flux detection system is constructed, firstly, the multi-point gas collection device is maintained in a sample detection state, a gas collection pump is started, the gas extraction speed is adjusted, and the operation is carried out for 30s after the stability is achieved; and then, switching the multi-point gas acquisition device to a reference correction state to ensure that the gas extraction pump maintains the operation parameters of the previous stage, adjusting the gas flow to be within +/-2% of the flow difference of the sample detection state by using a reference air regulating valve, stably operating for 30s, and switching to the sample detection state again to detect the flux of the soil implement.
The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.
Claims (6)
1. A gas-coated belt soil multi-point gas collection device with a background comparison function is characterized by comprising a fixing ring (1), wherein a driving ring (3) is arranged in the fixing ring (1), a servo motor (9) is arranged in the driving ring (3), the servo motor (9) is connected with the fixing ring (1) and used for driving, the multi-point gas collection device is respectively connected with the outer side of the fixing ring (1) and the driving ring (3), and the multi-point gas collection device can realize the change between a sample monitoring state and a reference correction state;
gaseous collection system of multiple spot position includes gas production pipeline interface (4) and inhales pipeline interface (6), gas production pipeline interface (4) are including a plurality ofly, evenly set up in the outside of solid fixed ring (1), gas production pipeline interface (4) are connected with initiative ring (3) through inhaling passageway (5), it is including a plurality of to inhale pipeline interface (6), evenly distributed is on the upper portion of initiative ring (3), be connected with the one end of inhaling passageway (5), gas production pipeline interface (4) include six, six gas production pipeline interfaces (4) are connected with initiative ring (3) through inhaling passageway (5) that correspond respectively, it is three to inhale pipeline interface (6), the interval sets up the one end at three passageway (5) of breathing in.
2. The aeration zone soil multipoint gas collection device with the background comparison function according to claim 1, wherein a sealing ring (2) is arranged between the fixed ring (1) and the active ring (3).
3. The gas-coated belt soil multipoint gas collection device with the background comparison function as claimed in claim 2, wherein the sealing ring (2) is a compressed polytetrafluoroethylene annular sealing gasket.
4. The gas-coated belt soil multipoint gas collection device with the background comparison function as claimed in claim 1, wherein the bottom of the inner side of the fixing ring (1) is provided with driven insections (7), and the servo motor (9) is meshed with the driven insections (7) through a gear torsion amplifier (8).
5. The gas-coated strip soil multipoint gas collection device with the background comparison function as claimed in claim 4, wherein the insection arc length of the driven insection (7) is 60-80 ° of the outer diameter of the driving ring.
6. The gas-coated belt soil multipoint gas collection device with the background comparison function as claimed in claim 4, wherein two ends of the driven insection (7) are provided with limiting devices capable of controlling the positive and negative rotation output of the servo motor (9).
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| CN201910894974.1A CN110761751B (en) | 2019-09-20 | 2019-09-20 | Aeration zone soil multi-point gas collection device with background comparison function |
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| CN112557629B (en) * | 2020-12-14 | 2023-08-08 | 中铁第一勘察设计院集团有限公司 | Soil gas flux measuring method |
| CN114018852A (en) * | 2021-11-16 | 2022-02-08 | 边缘智能研究院南京有限公司 | Carbon dioxide data acquisition system based on internet of things technology |
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