CN113550729B - Detection recovery device for unconventional oil gas exploitation vent - Google Patents

Detection recovery device for unconventional oil gas exploitation vent Download PDF

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Publication number
CN113550729B
CN113550729B CN202010256740.7A CN202010256740A CN113550729B CN 113550729 B CN113550729 B CN 113550729B CN 202010256740 A CN202010256740 A CN 202010256740A CN 113550729 B CN113550729 B CN 113550729B
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gas
outlet
phase separation
natural gas
communicated
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CN113550729A (en
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曹冬冬
李兴春
崔翔宇
范俊欣
翁艺斌
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China National Petroleum Corp
CNPC Research Institute of Safety and Environmental Technology Co Ltd
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China National Petroleum Corp
CNPC Research Institute of Safety and Environmental Technology Co Ltd
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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
    • E21B43/34—Arrangements for separating materials produced by the well
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
    • C10L3/06—Natural gas; Synthetic natural gas obtained by processes not covered by C10G, C10K3/02 or C10K3/04
    • C10L3/10—Working-up natural gas or synthetic natural gas
    • C10L3/101—Removal of contaminants
    • C10L3/102—Removal of contaminants of acid contaminants
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
    • C10L3/06—Natural gas; Synthetic natural gas obtained by processes not covered by C10G, C10K3/02 or C10K3/04
    • C10L3/10—Working-up natural gas or synthetic natural gas
    • C10L3/101—Removal of contaminants
    • C10L3/106—Removal of contaminants of water
    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
    • G01N1/34—Purifying; Cleaning
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/50—Fuel cells

Abstract

The invention provides a detection recovery device for unconventional oil gas exploitation vent gas, which comprises: the inlet of the three-phase separation device is communicated with the liquid outlet of the oil extraction machine, and natural gas, produced liquid and solid particles contained in the produced liquid which is introduced into the three-phase separation device by the oil extraction machine are separated; the detection and accounting device is communicated with the vent outlet of the three-phase separation device and is used for quantitatively accounting the gas in the produced liquid; the first purifying device is communicated with the natural gas outlet of the three-phase separating device and used for purifying natural gas; and the recycling device is communicated with the outlet of the first purifying device and recycles the purified natural gas. The invention solves the problem of serious oil gas resource loss caused by direct air discharge in the prior art.

Description

Detection recovery device for unconventional oil gas exploitation vent
Technical Field
The invention relates to the technical field of oil and gas exploitation, in particular to a detection and recovery device for unconventional oil and gas exploitation vent.
Background
When unconventional oil gas such as shale gas or coal bed gas is mined, specific mining liquid is often required to be injected into an oil gas-rich stratum through a high-pressure device, and after a period of underground physical and chemical processes, the mining is started after the mining index is qualified. The gas production process often adopts casing gas production, and along with the exploitation of natural gas, a large amount of produced liquid can be accompanied, and the produced liquid moves to the surface through an cantilever type, screw type or hydraulic rodless exploitation device and is discharged through a drain pipe.
The production fluid from the subterranean formation is at a high pressure and thus contains significant amounts of hydrocarbon components such as methane. Under the condition of no recovery, the dissolved oil gas in the produced liquid can escape to the atmosphere along with the sudden pressure reduction, so that on one hand, the oil gas resource is wasted; on the other hand, oil gas has certain toxicity and activity, and the direct discharge to the atmosphere can generate serious environmental problems such as atmosphere pollution, greenhouse effect and the like. Methane is a component with strong greenhouse effect, contributing to global warming second only to CO 2 Reduction of methane isothermal chamber gas emissions is an urgent issue. In addition, when the oil gas component released to the atmosphere after being irradiated by sunlight further participates in the photochemical reaction process, secondary aerosol, ozone and other secondary pollutants are generated, and the ecological environment is negatively influenced.
In the unconventional oil gas resource exploitation process, the in-situ utilization is realized through the process improvement or the additional recovery device, and the oil gas resource is recovered from the exploitation liquid, so that on one hand, methane and other oil gas components discharged to the natural environment in the exploitation process can be reduced, and on the other hand, the chemical energy of the exhausted oil gas can be utilized in situ, thereby being one of the key problems for realizing the low-carbon green economic exploitation of the unconventional oil gas resource. Currently, few studies are conducted on the venting oil gas of unconventional oil gas exploitation processes, and the methane emission base of the exploitation processes is very deficient. The existing unconventional oil gas exploitation platform or single equipment is basically not matched with a corresponding air release recovery and utilization device, the phenomenon of directly releasing air generated in the exploitation process is very common, and the loss of oil gas resources caused by the phenomenon is very serious. The total amount accounting of the discharged oil gas such as the discharged methane in the unconventional oil gas exploitation process is developed, and the matched oil gas recovery and utilization device and method are developed, so that the method has important significance for realizing sustainable green low-carbon development of unconventional oil gas exploitation.
Disclosure of Invention
The invention mainly aims to provide a detection recovery device for unconventional oil gas exploitation vent gas, which aims to solve the problem of serious oil gas resource loss caused by direct vent of the vent gas in the prior art.
In order to achieve the above object, the present invention provides a detection and recovery device for unconventional oil and gas production blow-down gas, comprising: the inlet of the three-phase separation device is communicated with the liquid outlet of the oil extraction machine, and natural gas, produced liquid and solid particles contained in the produced liquid which is introduced into the three-phase separation device by the oil extraction machine are separated; the detection and accounting device is communicated with the vent outlet of the three-phase separation device and is used for quantitatively accounting the gas in the produced liquid; the first purifying device is communicated with the natural gas outlet of the three-phase separating device and used for purifying natural gas; and the recycling device is communicated with the outlet of the first purifying device and recycles the purified natural gas.
Further, the detection and recovery device further comprises a liquid storage tank, an inlet of the liquid storage tank is communicated with a produced liquid outlet of the three-phase separation device, and an outlet of the liquid storage tank is communicated with the first purification device.
Further, the detection and recovery device also comprises a first compression device, wherein an inlet of the first compression device is communicated with an outlet of the first purification device, and natural gas purified by the first purification device is compressed and concentrated.
Further, the detection and recovery device further comprises a gas holder, an inlet of the gas holder is communicated with an outlet of the first compression device and used for stabilizing and buffering high-purity fuel gas from the first compression device, an outlet of the gas holder is communicated with the recycling device and used for conveying the obtained available raw materials to the recycling device.
Further, the first compression device is in communication with an outlet at the bottom of the first purification device.
Further, the recycling device comprises a fuel cell device which generates electric energy by electrochemical reaction of natural gas.
Further, the reuse device further includes at least one of an electric power storage unit connected to the fuel cell device, a water discharge and heat utilization device, and a safe operation management device.
Further, the detection and recovery device further comprises a second purifying device, wherein the second purifying device is communicated with a gas outlet of the oil extraction machine and purifies the extracted gas.
Further, the detection and recovery device also comprises a second compression device, wherein the second compression device is communicated with the second purification device and compresses and concentrates the gas purified by the second purification device.
Further, an air outlet at the top of the three-phase separation device is connected with an inlet at the bottom of the detection accounting device, a natural gas outlet at the top of the three-phase separation device is connected with an inlet at the top of the first purification device, and a produced liquid outlet at the side wall of the three-phase separation device is connected with an inlet at the top of the liquid storage tank.
By applying the technical scheme of the invention, the gas-liquid-solid components of the produced liquid output by the oil extraction machine are separated through the three-phase separation device to obtain natural gas, produced liquid and solid particles, so that raw materials are provided for detection accounting and recycling of the whole device; the discharged air from the three-phase separation device enters the gas collecting bag after being quantitatively calculated by the detection calculation device, then the gas components in the gas collecting bag are detected, and the gas production time and the running time of the oil gas production device are combined to be estimated more accurately; the first purification device purifies the natural gas with the water vapor and the acid components separated by the three-phase separation device, and the purified natural gas can be reused by the subsequent reuse device, so that on one hand, the methane emission condition in the exploitation process can be detected and calculated in situ by detecting the methane components in the air exhausted in the unconventional oil gas resource exploitation process, on the other hand, the in-situ trapping and utilization of the natural gas components in the air exhausted can be realized, the utilization rate of the natural gas is improved, the emission of greenhouse gas can be avoided, the air quality is improved, and the method has important significance for realizing the green and efficient exploitation of the unconventional oil gas resources. In addition, since the produced liquid contains static pressure energy and kinetic energy, the produced liquid can be used as conveying power, external energy supply is saved, and the running load and the production efficiency of the system are improved. The feeding ratio of the collected gas to the discharged air can be flexibly adjusted according to different properties of discharged air components, different discharged air flow and different requirements of mining processes, and the method has the advantages of being simple in process, high in operation elasticity, simple and easy to operate and the like.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:
fig. 1 is a schematic diagram showing the structure of a detection and recovery device according to a first embodiment of the present invention; and
fig. 2 is a schematic diagram showing the structure of a detection and recovery device according to a second embodiment of the present invention.
Wherein the above figures include the following reference numerals:
10. a three-phase separation device; 20. an oil extraction machine; 30. detecting an accounting device; 40. a first purifying device; 51. a fuel cell device; 52. an electric power storage unit; 53. drainage and heat utilization means; 54. a safe operation management device; 60. a liquid storage tank; 70. a first compression device; 80. a gas holder; 90. a second purifying device; 100. and a second compression device.
Detailed Description
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.
It is noted that all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs unless otherwise indicated.
In the present invention, unless otherwise indicated, terms of orientation such as "upper, lower, top, bottom" are used generally with respect to the orientation shown in the drawings or with respect to the component itself in the vertical, upright or gravitational direction; also, for ease of understanding and description, "inner and outer" refers to inner and outer relative to the profile of each component itself, but the above-mentioned orientation terms are not intended to limit the present invention.
The invention provides a detection recovery device for unconventional oil gas exploitation air release, which aims to solve the problem that oil gas resource loss is serious due to direct air release in the prior art.
Example 1
The detection and recovery device for unconventional oil and gas exploitation vent gas shown in fig. 1 comprises a three-phase separation device 10, a detection accounting device 30, a first purification device 40 and a recycling device, wherein an inlet of the three-phase separation device 10 is communicated with a liquid outlet of an oil extraction machine 20, and natural gas, produced liquid and solid particles contained in exploitation liquid which is introduced into the three-phase separation device 10 by the oil extraction machine 20 are separated; the detection and accounting device 30 is communicated with the vent outlet of the three-phase separation device 10 and is used for quantitatively accounting the gas in the produced liquid; the first purifying device 40 is communicated with the natural gas outlet of the three-phase separating device 10, and purifies natural gas; the reuse device communicates with the outlet of the first purifying device 40 and reuses the purified natural gas.
In the embodiment, the three-phase separation device 10 is used for separating the gas, liquid and solid components of the produced liquid output by the oil extraction machine 20 to obtain natural gas, produced liquid and solid particles, so that raw materials are provided for detection accounting and recycling of the whole device; the discharged air from the three-phase separation device 10 enters the gas collecting bag after being quantitatively calculated by the detection calculation device 30, then the gas components in the gas collecting bag are detected, and the gas production time and the operation time of the oil gas production device are combined to be accurately estimated; the first purifying device 40 purifies the natural gas with water vapor and acid components separated by the three-phase separating device 10, and the purified natural gas can be reused by a later continuous reusing device, so that on one hand, the methane emission condition in the exploitation process can be obtained through detection and in-situ accounting of methane components in the air exhausted in the unconventional oil gas resource exploitation process, and on the other hand, the in-situ trapping and utilization of the natural gas components in the air exhausted can be realized, thereby not only improving the utilization rate of the natural gas, but also avoiding the emission of greenhouse gas, improving the air quality, and having important significance for realizing the green and efficient exploitation of unconventional oil gas resources. In addition, since the produced liquid contains static pressure energy and kinetic energy, the produced liquid can be used as conveying power, external energy supply is saved, and the running load and the production efficiency of the system are improved. The feeding ratio of the collected gas to the discharged air can be flexibly adjusted according to different properties of discharged air components, different discharged air flow and different requirements of mining processes, and the method has the advantages of being simple in process, high in operation elasticity, simple and easy to operate and the like.
In this embodiment, the detection and recovery device further includes a liquid storage tank 60, an inlet of the liquid storage tank 60 is communicated with a produced liquid outlet of the three-phase separation device 10, and an outlet of the liquid storage tank 60 is communicated with the first purifying device 40. Because the produced liquid separated by the three-phase separation device 10 is also mixed with partial natural gas, the liquid storage tank 60 is arranged, the produced liquid passing through the three-phase separation device 10 enters the liquid storage tank 60 and is analyzed again, thus, the three-phase separation device 10 and the liquid storage tank 60 form two-stage analysis, the high-efficiency separation of the natural gas and the produced liquid is realized, the natural gas analysis rate reaches more than 99%, the analysis effect is ensured, and the produced liquid without oil gas and the natural gas with high heat value are ensured to be obtained.
In this embodiment, the detection and recovery device further includes a first compression device 70, where an inlet of the first compression device 70 is communicated with an outlet of the first purification device 40, and the natural gas purified by the first purification device 40 is compressed and concentrated, so as to obtain the high-purity fuel-grade natural gas. Further, the detection and recovery device further comprises a gas holder 80, an inlet of the gas holder 80 is communicated with an outlet of the first compression device 70, and high-purity fuel gas from the first compression device 70 is subjected to pressure stabilization and buffering to obtain available raw materials with controllable flow and pressure, wherein the available raw materials are applicable to a subsequent recycling device, and an outlet of the gas holder 80 is communicated with the recycling device and conveys the available raw materials to the recycling device.
Preferably, the outlet of the first purifier is located at the bottom thereof, i.e. the bottom or the side wall is close to the bottom, and the first compression device 70 is in communication with the outlet at the bottom of the first purifier 40, so as to ensure that the natural gas purified by the first purifier can smoothly enter the first compression device 70.
In this embodiment, the recycling device includes a fuel cell device 51, the fuel cell device 51 generates electric energy by electrochemical reaction with natural gas, thus, by utilizing the coupling technology of recycling of discharged air and electrochemical in situ utilization, the discharged air is collected and utilized in situ, on one hand, the oil gas yield of the whole exploitation process is improved by collecting natural gas components carried in the extracted liquid, on the other hand, the collected fuel gas is converted and utilized in situ by the fuel cell device 51, the fossil fuel utilization mode is green, the chemical energy utilization rate is high, the generated clean electric energy can be used by exploitation power machinery, the outsourcing electric quantity is reduced, and the low-carbon exploitation of unconventional oil gas is realized.
Preferably, the vent outlet at the top of the three-phase separation device 10 is connected with the inlet at the bottom of the detection accounting device 30, the natural gas outlet at the top of the three-phase separation device 10 is connected with the inlet at the top of the first purifying device 40, and the produced liquid outlet at the side wall of the three-phase separation device 10 is connected with the inlet at the top of the liquid storage tank 60. The top here refers to a position where the top surface or the side wall of the device is close to the top surface, and the bottom refers to a position where the bottom surface or the side wall of the device is close to the bottom surface.
Example two
The difference from the first embodiment is that the inspection recovery device further includes other devices.
As shown in fig. 2, the recycling device of the inspection recycling device of the present embodiment further includes an electric power storage unit 52, a drain and heat utilization device 53, and a safe operation management device 54, which are connected to the fuel cell device 51. Of course, only one or two of the three can be provided, or other matched devices can be additionally provided.
In the present embodiment, in addition to the utilization of the produced liquid, the utilization of the produced gas such as further separation, purification, compression, metering and delivery can be performed, and specifically, the inspection and recovery device further includes a second purification device 90, and the second purification device 90 communicates with the gas outlet of the oil extraction machine 20 and purifies the produced gas. The detection and recovery device further comprises a second compression device 100, the second compression device 100 is communicated with the second purification device 90, and the gas purified by the second purification device 90 enters the second compression device 100 and is compressed and concentrated in the second compression device 100.
Through practical use, the exploitation well adopting the detection and recovery device for the unconventional oil and gas exploitation and air release of the embodiment improves the daily exploitation amount of natural gas from 270 cubic meters to 300 cubic meters, the reduction amount of greenhouse gas exhausted into the atmosphere is close to 30 cubic meters, the conversion efficiency of the fuel cell is calculated to be 50%, the output electric quantity per hour is close to 6 kilowatt-hours, 52560 kilowatt-hours of electric quantity can be saved each year, and each exploitation device can save approximately 4 kilo-yuan each year according to the electric price per degree of 0.725 yuan. In another production well using the detection recovery device for unconventional oil and gas production and release of the embodiment, the daily production of natural gas is increased from 2100 cubic meters to 2268 cubic meters, the reduction amount of greenhouse gas discharged into the atmosphere is close to 170 cubic meters, and the output electric quantity per hour is close to 48 kilowatt-hours calculated by 50% of the conversion efficiency of the fuel cell. The electric quantity can be saved by 42 kilowatts per year, and the price of electricity per degree is 0.725 yuan, and each mining equipment can be saved by more than 30 kilowatts per year.
It should be noted that, in the above embodiments, a plurality refers to at least two.
From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:
1. solves the problem of serious oil gas resource loss caused by direct air discharge in the prior art;
2. the methane emission condition in the exploitation process can be clarified through detecting the methane component in the air discharged in the exploitation process of unconventional oil and gas resources;
3. the natural gas component in the discharged air can be captured and utilized in situ, so that the natural gas utilization rate is improved, the emission of greenhouse gases can be avoided, the air quality is improved, and the method has important significance in realizing the green and efficient exploitation of unconventional oil and gas resources;
4. the produced liquid contains static pressure energy and kinetic energy, so that the produced liquid can be used as conveying power, external energy is saved, and the running load and the production efficiency of the system are improved;
5. the feeding ratio of the collected gas to the discharged air can be flexibly adjusted according to different properties of the discharged air components, different discharged air flow and different requirements of the exploitation process, and the method has the advantages of simple process, high operation elasticity, simplicity, easiness in operation and the like;
6. the three-phase separation device and the liquid storage tank form two-stage analysis, so that the high-efficiency separation of natural gas and produced liquid is realized, the natural gas analysis rate reaches more than 99%, and the analysis effect is ensured;
7. the method utilizes the coupling technology of the recovery of the discharged air and the electrochemical in-situ utilization to collect and utilize the discharged air in situ, improves the oil gas yield in the whole exploitation process, protects the fossil fuel utilization mode, has high utilization rate of chemical energy, and realizes the low-carbon exploitation of unconventional oil gas.
It will be apparent that the embodiments described above are merely some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
It should be noted that the terms "first," "second," and the like in the description and claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the present application described herein may be implemented in sequences other than those illustrated or described herein.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (9)

1. The utility model provides a detection recovery unit of unconventional oil gas exploitation bleed air which characterized in that includes:
the three-phase separation device (10), the inlet of the three-phase separation device (10) is communicated with the liquid outlet of the oil extraction machine (20), and natural gas, produced liquid and solid particles contained in the produced liquid which is introduced into the three-phase separation device (10) by the oil extraction machine (20) are separated;
a detection and calculation device (30), wherein the detection and calculation device (30) is communicated with an air outlet of the three-phase separation device (10) and is used for quantitatively calculating the gas in the produced liquid;
a first purifying device (40), wherein the first purifying device (40) is communicated with a natural gas outlet of the three-phase separating device (10) and purifies natural gas;
the recycling device is communicated with the outlet of the first purifying device (40) and recycles the purified natural gas;
the detection and recovery device further comprises a liquid storage tank (60), the liquid storage tank (60) is used for resolving the produced liquid of the three-phase separation device (10) again, an inlet of the liquid storage tank (60) is communicated with a produced liquid outlet of the three-phase separation device (10), and an outlet of the liquid storage tank (60) is communicated with the first purification device (40).
2. The test recovery device of claim 1, further comprising a first compression device (70), wherein an inlet of the first compression device (70) is in communication with an outlet of the first purification device (40) and compresses and concentrates natural gas purified from the first purification device (40).
3. The apparatus according to claim 2, further comprising a gas holder (80), wherein an inlet of the gas holder (80) is in communication with an outlet of the first compression device (70) and pressure-stabilizing buffers the high purity fuel gas from the first compression device (70), and an outlet of the gas holder (80) is in communication with the recycling device and conveys the obtained usable raw material to the recycling device.
4. The test recovery device according to claim 2, wherein the first compression device (70) communicates with an outlet at the bottom of the first purification device (40).
5. The test recovery apparatus of claim 1, wherein the recycling apparatus comprises a fuel cell apparatus (51), the fuel cell apparatus (51) generating electrical energy from natural gas by electrochemical reaction.
6. The apparatus according to claim 5, wherein the recycling apparatus further comprises at least one of a power storage unit (52), a water discharge and heat utilization apparatus (53), and a safe operation management apparatus (54) connected to the fuel cell apparatus (51).
7. The recovery device according to claim 1, further comprising a second purifying device (90), the second purifying device (90) being in communication with the gas outlet of the oil recovery machine (20) and purifying produced gas.
8. The test recovery apparatus of claim 7, further comprising a second compression device (100), the second compression device (100) being in communication with the second purification device (90) and compressing and concentrating the purified gas from the second purification device (90).
9. The detection and recovery device according to claim 1, wherein an air outlet at the top of the three-phase separation device (10) is connected to an inlet at the bottom of the detection and accounting device (30), a natural gas outlet at the top of the three-phase separation device (10) is connected to an inlet at the top of the first purification device (40), and a produced liquid outlet at the side wall of the three-phase separation device (10) is connected to an inlet at the top of the liquid storage tank (60).
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