CN108245936B - Defoaming system for foam drainage process - Google Patents
Defoaming system for foam drainage process Download PDFInfo
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- CN108245936B CN108245936B CN201711383076.7A CN201711383076A CN108245936B CN 108245936 B CN108245936 B CN 108245936B CN 201711383076 A CN201711383076 A CN 201711383076A CN 108245936 B CN108245936 B CN 108245936B
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- microreactor
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- defoaming
- gas
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- 239000006260 foam Substances 0.000 title claims abstract description 93
- 238000000034 method Methods 0.000 title claims abstract description 30
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 52
- 238000002347 injection Methods 0.000 claims abstract description 47
- 239000007924 injection Substances 0.000 claims abstract description 47
- 239000000243 solution Substances 0.000 claims abstract description 28
- 239000012530 fluid Substances 0.000 claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000007788 liquid Substances 0.000 claims abstract description 20
- 238000005187 foaming Methods 0.000 claims abstract description 8
- 238000007599 discharging Methods 0.000 claims description 13
- 239000010865 sewage Substances 0.000 claims description 5
- 239000007789 gas Substances 0.000 abstract description 36
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 24
- 239000003345 natural gas Substances 0.000 abstract description 12
- 238000011161 development Methods 0.000 abstract description 6
- 238000011084 recovery Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 description 14
- 238000012546 transfer Methods 0.000 description 13
- 238000006243 chemical reaction Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 4
- 239000004615 ingredient Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 241000191291 Abies alba Species 0.000 description 2
- 239000013530 defoamer Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000003254 anti-foaming effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002343 natural gas well Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- ZIBGPFATKBEMQZ-UHFFFAOYSA-N triethylene glycol Chemical compound OCCOCCOCCO ZIBGPFATKBEMQZ-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D19/00—Degasification of liquids
- B01D19/0073—Degasification of liquids by a method not covered by groups B01D19/0005 - B01D19/0042
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D19/00—Degasification of liquids
- B01D19/0068—General arrangements, e.g. flowsheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D19/00—Degasification of liquids
- B01D19/02—Foam dispersion or prevention
- B01D19/04—Foam dispersion or prevention by addition of chemical substances
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Dispersion Chemistry (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
The invention discloses a defoaming system for a foam drainage process, which comprises: a microreactor having an input and an output; a microchannel communicated with the input port and the output port is arranged in the microreactor; the input port of the microreactor can be communicated with a wellhead to input foam fluid in a well; the injection device is communicated with the input port of the microreactor; the injection device is used for injecting an antifoaming agent solution into the microreactor so as to enable the antifoaming agent solution to react with the foaming fluid in the microchannel; the gas-water separator is communicated with the output port of the microreactor; the gas-water separator can separate the fluid discharged from the output port of the micro-reactor into gas and liquid. The defoaming system for the foam drainage process can eliminate foam produced by a well mouth, so that high and stable yield of the natural gas in the effluent gas field is guaranteed, and the development efficiency and the recovery ratio are improved.
Description
Technical Field
The invention belongs to the field of petroleum and natural gas exploitation, and particularly relates to a defoaming system for a foam drainage process.
Background
More than 80% of developed gas fields in China have water-gas reservoirs, the natural gas reserves account for 75% of the total reserves, the annual gas yield contribution rate exceeds 70%, and the natural gas reservoir rock is a foundation stone for stable and high-yield natural gas and large-scale natural gas development. With the extension of development time, the number of water outlet wells of the gas field is rapidly increased, 60 percent of production wells are reached at present, the yield of the gas well after water outlet is reduced by 20 to 85 percent, and a serious challenge is brought to the continuous stable production and production of natural gas.
Decades of development and practice at home and abroad show that the drainage gas production technology is the most effective measure for ensuring the stable yield and improving the recovery rate of the effluent gas field, and taking Chinese petroleum as an example, the drainage gas production is carried out for more than 6000 times in 2015, so that the normal production of the gas field is ensured, more than 30 hundred million parts of natural gas is increased, and the continuous stable yield of the effluent gas field is effectively ensured.
The drainage gas production technology comprises various technologies such as foam drainage gas production, velocity columns, gas lift and the like, wherein the foam drainage gas production accounts for 82% of the total drainage gas production wells, and is the most widely applied, most economical and effective technology. The foaming process has the effects of generating a large amount of foam in the shaft and reducing the density of a mixture in the shaft, so that accumulated liquid in the shaft is discharged smoothly, the back pressure of the accumulated liquid to the bottom of the well is reduced, and the stable yield and the yield increase of a gas well are ensured; the defoaming process has the effect of quickly defoaming after foams return to a wellhead, so that the phenomena that the resistance is sharply increased due to the fact that the foams are gathered on a ground pipeline and the foams flow to ground equipment and then damage a separator, a dehydration tower and the like to cause huge economic loss are avoided.
To the well head defoaming, at present mainly adopt on the well head pipeline defoaming and the station in concentrate the mode of defoaming go on, because the defoaming agent that the well head pours into and the station in the mode of concentrating the defoaming and returns out with the pit shaft foam can't be mixed in the short time fully, lead to the defoaming incomplete, partial foam flows to separator and triethylene glycol device along the pipeline, often causes downstream equipment to damage, causes serious economic loss and safety risk.
Therefore, a set of foam drainage gas production scheme for efficient defoaming is established, foams produced at a well mouth are eliminated to the maximum extent, and the foam drainage gas production scheme has important economic and social significance for ensuring high and stable yield of the natural gas of the effluent gas field and improving development efficiency and recovery efficiency.
Disclosure of Invention
In view of the defects of the prior art, the invention aims to provide a defoaming system for a foam drainage process, so that foam produced at a wellhead can be eliminated, the high and stable yield of natural gas in a water-out gas field is ensured, and the development efficiency and the recovery rate are improved.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a defoaming system for a foam drainage process comprising:
a microreactor having an input and an output; a microchannel communicated with the input port and the output port is arranged in the microreactor; the input port of the microreactor can be communicated with a wellhead to input foam fluid in a well;
the injection device is communicated with the input port of the microreactor; the injection device is used for injecting an antifoaming agent solution into the microreactor so as to enable the antifoaming agent solution to react with the foaming fluid in the microchannel;
the gas-water separator is communicated with the output port of the microreactor; the gas-water separator can separate the fluid discharged from the output port of the micro-reactor into gas and liquid.
As a preferred embodiment, the injection device comprises an antifoaming agent tank and an injection pump; the defoaming agent tank is used for storing defoaming agent solution, the injection pump is communicated with the defoaming agent tank, a valve is arranged between the injection pump and the defoaming agent tank, and the output end of the injection pump is communicated with the input port of the microreactor.
In a preferred embodiment, the gas-water separator has a gas outlet and a liquid outlet; the gas outlet is positioned above the liquid outlet.
In a preferred embodiment, the diameter of the microchannel is less than 500 μm.
In a preferred embodiment, the microchannel in the microreactor extends spirally in the microreactor, and the input port and the output port of the microreactor are respectively communicated with two ends of the microchannel.
As a preferred embodiment, the input ports of the microreactor comprise a foam input port and a defoamer input port; the foam input port and the output port of the micro-reactor are respectively communicated with two ends of the micro-channel; the defoaming agent input ports are communicated with different positions of the microchannel along the extending direction of the microchannel.
As a preferred embodiment, the device also comprises a foam injection device and an injection well; the injection well comprises an oil pipe and a casing pipe sleeved outside the oil pipe; an oil sleeve annulus is formed between the oil pipe and the sleeve; the foam injection equipment is communicated with the oil sleeve annulus, and the oil sleeve annulus is communicated with the inside of the oil pipe.
As a preferred embodiment, the foam injection apparatus comprises a foam discharging cart.
In a preferred embodiment, the liquid output port of the gas-water separator is communicated with a sewage pool through a pipeline.
In a preferred embodiment, a valve is arranged on a pipeline between the foam discharging vehicle and the injection well; and a valve is arranged on a pipeline between the oil pipe and the microreactor.
Advantageous effects
The defoaming system for the foam drainage process uses the microreactor, fluid flows in the channels and is required to generate the required defoaming reaction in the channels by depending on the micro-reactor containing the micro-channel size and the channel diversity, and the unique structure of the microreactor (the micro-channel size and the channel diversity) can ensure that the microreactor has excellent heat transfer and mass transfer capacity and can realize the instant uniform mixing and high-efficiency heat transfer of materials.
Specific embodiments of the present invention are disclosed in detail with reference to the following description and drawings, indicating the manner in which the principles of the invention may be employed. It should be understood that the embodiments of the invention are not so limited in scope. The embodiments of the invention include many variations, modifications and equivalents within the spirit and scope of the appended claims.
Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments, in combination with or instead of the features of the other embodiments.
It should be emphasized that the term "comprises/comprising" when used herein, is taken to specify the presence of stated features, integers, steps or components but does not preclude the presence or addition of one or more other features, integers, steps or components.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of a defoaming system for a foam drainage process according to an embodiment of the present invention.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, shall fall within the scope of protection of the present invention.
It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, 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 invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1, a schematic structural diagram of a defoaming system for a foam drainage process according to an embodiment of the present invention is shown, where the defoaming system for the foam drainage process includes: a microreactor 5 having an input and an output 12; a micro-channel 13 communicated with the input port and the output port 12 is arranged in the micro-reactor 5; the input port of the microreactor 5 can be communicated with a wellhead to input foam fluid in a well; an injection device communicated with an input port of the microreactor 5; the injection device is used for injecting an antifoaming agent solution into the microreactor 5 so as to enable the antifoaming agent solution to react with the foaming fluid in the microchannel 13; a gas-water separator 8 communicated with an output port 12 of the microreactor 5; the gas-water separator 8 can separate the fluid discharged from the output port 12 of the microreactor 5 into gas and liquid.
The defoaming system for the foam drainage process in the embodiment uses the microreactor 5, and depends on the microreactor 5 containing tiny channel size and channel diversity, fluid flows in the channels and is required to generate the required defoaming reaction in the channels, and the unique structure (tiny channel size and channel diversity) of the microreactor 5 can enable the microreactor 5 to have excellent heat transfer and mass transfer capacity, so that instant uniform mixing and efficient heat transfer of materials can be realized, therefore, the defoaming system for the foam drainage process in the embodiment utilizes the instant uniform mixing performance of the materials of the microreactor 5, and can achieve the effect of rapidly and thoroughly eliminating foam returned from a wellhead of a foam drainage gas production well, and ensure the safety of downstream equipment and pipelines.
In this embodiment, the microreactor 5 may provide a site for the reaction of the foamed fluid with the defoaming agent. The foaming fluid is simultaneously fed into the microchannel 13 in the microreactor 5 with an antifoaming agent, and an antifoaming reaction is carried out in the microchannel 13. A large number of microchannels 13 are present in the microreactor 5, in particular said microchannels 13 have a diameter of less than 500 micrometers. With such a small diameter, when the injection device injects the defoaming agent solution and the foam fluid into the microchannel 13, a large driving force must be applied to the defoaming agent solution and the foam fluid, so that a high-pressure environment is formed in the microchannel 13, which is more favorable for the defoaming reaction.
The plurality of microchannels 13 are connected in series in the microreactor 5, and have different structural shapes to form a complicated and minute reaction space. The microchannel 13 is filled inside the microreactor 5. Two adjacent microchannels 13 can be separated by the wall of the microchannel 13. The thickness of the wall of the microchannel 13 is not larger than the diameter of the microchannel 13, so that the microreactor 5 has excellent heat transfer and mass transfer capabilities, and can realize instantaneous uniform mixing of materials and efficient heat transfer.
In the present embodiment, a microchannel 13 in the microreactor 5 extends spirally inside the microreactor 5, and an input port and an output port 12 of the microreactor 5 communicate with both ends of the microchannel 13, respectively. Wherein, there can be a plurality of spiral micro-channels 13, and a plurality of spiral micro-channels 13 can be crossed, parallel or even isolated from each other to fill the inside of the micro-reactor 5. As shown in fig. 1, a foam input port 10 and a defoaming agent input port 11 are provided at one end of the microreactor 5, and an output port 12 is provided at the other end of the microreactor 5.
In one embodiment, to increase the contact degree of the defoaming agent solution with the foam fluid, further enhance the defoaming degree, and prevent the problem of the decrease of the defoaming capability of the microreactor 5 near the output port 12, the input ports of the microreactor 5 include a foam input port 10 and a defoaming agent input port 11. The foam input port 10 and the output port 12 of the microreactor 5 are respectively communicated with two ends of the microchannel 13; the plurality of defoaming agent input ports 11 communicate with different positions of the microchannel 13 in the extending direction of the microchannel 13. Therefore, the defoaming agent solution is continuously input into the micro channel 13 through the defoaming agent input ports 11, so that the reacted defoaming agent is compensated, and the defoaming efficiency and thorough defoaming are ensured.
It is considered that the microchannels 13 present various configurations inside the microreactors 5 and are distributed in large numbers. In view of this consideration, in a further embodiment, a plurality of antifoam inlet ports 11 are provided at different locations in the side wall of the microreactor 5 and communicate with microchannels 13 inside the microreactor 5. So not only be convenient for make, also can input the defoaming agent solution to microchannel 13 absolutely moreover, compensate the defoaming agent that the reaction is fallen, guarantee defoaming efficiency and defoaming thoroughly.
In the present embodiment, the injection device includes a defoaming agent tank 6 and an injection pump 7; the defoaming agent tank 6 is used for storing defoaming agent solution, the injection pump 7 is communicated with the defoaming agent tank 6, a valve is arranged between the injection pump 7 and the defoaming agent tank 6, and the output end of the injection pump 7 is communicated with the input port of the microreactor 5.
Wherein the defoamer tank 6 may be fixed on the ground and positioned close to the injection well. The defoaming agent tank 6 is connected with an injection pump 7 through a pipeline (pipeline), the injection pump 7 is communicated with the microreactor 5 through a pipeline, and a valve is arranged on the pipeline to control the input on-off of a defoaming agent solution. Can be based on the power of defoaming agent solution to microchannel 13 input through injection pump 7, and defoaming agent solution gets into microchannel 13 and reacts with the foam fluid that the well head returned fast under the effect of this drive force to defoaming fast.
The defoaming agent solution reacts with the foam fluid in the microchannel 13 to eliminate foam in the foam fluid, so that gas-phase fluid and liquid-phase fluid are formed, and because a certain pressure exists in the microreactor 5, in order to ensure that the gas content in the liquid discharged by the microreactor 5 is low and prevent bubbles from being formed again because the flowing gas escapes from the liquid, an output port 12 of the microreactor 5 is communicated with the gas-water separator 8.
In the present embodiment, the gas-water separator 8 may be a cyclone gas-water separator 8 or a compressed air gas-water separator 8, and the application is not limited thereto. For the convenience of separated gas output, the gas-water separator 8 is provided with a gas output port 12 and a liquid output port 12; the gas outlet 12 is located above the liquid outlet 12. In addition, a liquid output port 12 of the gas-water separator 8 is communicated with the sewage pool 9 through a pipeline.
In this embodiment, the defoaming system for a foam drainage process may further include foam injection equipment and an injection well; the injection well comprises an oil pipe 3 and a casing 2 sleeved outside the oil pipe 3; an oil sleeve annulus is formed between the oil pipe 3 and the casing 2; the foam injection equipment is communicated with the oil sleeve annulus, and the oil sleeve annulus is communicated with the inside of the oil pipe 3. Specifically, the foam injection device comprises a foam discharging vehicle 1. A valve is arranged on a pipeline between the foam discharging vehicle 1 and the injection well; and a valve is arranged on a pipeline between the oil pipe 3 and the microreactor 5. Wherein, the foam discharging vehicle 1 can input the foam discharging agent solution into the well. The wellhead can be provided with a Christmas tree 4 so as to be convenient for connecting the foam discharging vehicle 1 and the microreactor 5 through pipelines, and the Christmas tree 4 is communicated with the oil sleeve annulus and the interior of the oil pipe 3 and provides different connecting ports.
The defoaming system for the foam drainage process of the present embodiment will be described in detail with reference to the example shown in fig. 1 in order to better understand the present invention.
When foaming drainage is needed underground, a foam discharging agent solution is injected into a shaft of a natural gas well from a foam discharging vehicle 1 on the ground through a charging pump of the foam discharging vehicle, the foam discharging agent solution is mixed with accumulated liquid at the bottom of the well, a large amount of foam is generated under the stirring of natural gas flow, and then the foam is brought to the well mouth along with the flow of the natural gas and enters a microchannel 13 in the microreactor 5 from a foam input port 10 of the microreactor 5. Because the density of the foam is low, the foam can be easily taken out to the ground, and meanwhile, the accumulated liquid at the bottom of the well is also taken out to the ground, so that the influence of the accumulated liquid on a gas well is greatly reduced.
When defoaming is needed, a defoaming agent solution enters the microreactor 5 from a defoaming agent input port 11 through an injection pump 7 from a defoaming agent tank 6, the defoaming agent solution is rapidly mixed with a foaming fluid returned from a wellhead in the microreactor 5 and is rapidly defoamed, and the microreactor 5 has excellent heat transfer and mass transfer capabilities, so that no foam residue is left after passing through the microreactor 5, and the foam residue is changed into pure gas and water. The defoamed gas-water mixture jointly enters a gas-water separator 8 for gas-water separation.
Meanwhile, the above effects of the defoaming system for the foam drainage process of the embodiment are also effectively verified in field tests. The method develops field tests of 15 wells of 2 well stations in a certain gas field in China from 2015, before the field tests are carried out, foam blocking accidents of the separator occur for 3-4 times every year in the two well stations, and sporadic foam is common in a sewage tank 9; by implementing the defoaming system for the foam drainage process of the embodiment, no separator foam blockage accident occurs until now, and the sewage tank 9 is clean and free of foam all the year around. In addition, because the defoaming device of the microreactor 5 has excellent heat transfer and mass transfer capacities, the consumption of the defoaming agent is greatly reduced, and compared with the conventional foam drainage gas production method, the consumption of the defoaming agent is reduced by more than 30 percent, so that the cost is reduced, and the effect is improved obviously.
Any numerical value recited herein includes all values from the lower value to the upper value that are incremented by one unit, provided that there is a separation of at least two units between any lower value and any higher value. For example, if it is stated that the number of a component or a value of a process variable (e.g., temperature, pressure, time, etc.) is from 1 to 90, preferably from 20 to 80, and more preferably from 30 to 70, it is intended that equivalents such as 15 to 85, 22 to 68, 43 to 51, 30 to 32 are also expressly enumerated in this specification. For values less than 1, one unit is suitably considered to be 0.0001, 0.001, 0.01, 0.1. These are only examples of what is intended to be explicitly recited, and all possible combinations of numerical values between the lowest value and the highest value that are explicitly recited in the specification in a similar manner are to be considered.
Unless otherwise indicated, all ranges include the endpoints and all numbers between the endpoints. The use of "about" or "approximately" with a range applies to both endpoints of the range. Thus, "about 20 to about 30" is intended to cover "about 20 to about 30", including at least the endpoints specified.
All articles and references disclosed, including patent applications and publications, are hereby incorporated by reference for all purposes. The term "consisting essentially of …" describing a combination shall include the identified element, ingredient, component or step as well as other elements, ingredients, components or steps that do not materially affect the basic novel characteristics of the combination. The use of the terms "comprising" or "including" to describe combinations of elements, components, or steps herein also contemplates embodiments that consist essentially of such elements, components, or steps. By using the term "may" herein, it is intended to indicate that any of the described attributes that "may" include are optional.
A plurality of elements, components, parts or steps can be provided by a single integrated element, component, part or step. Alternatively, a single integrated element, component, part or step may be divided into separate plural elements, components, parts or steps. The disclosure of "a" or "an" to describe an element, ingredient, component or step is not intended to foreclose other elements, ingredients, components or steps.
It is to be understood that the above description is intended to be illustrative, and not restrictive. Many embodiments and many applications other than the examples provided will be apparent to those of skill in the art upon reading the above description. The scope of the present teachings should, therefore, be determined not with reference to the above description, but should instead be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled. The disclosures of all articles and references, including patent applications and publications, are hereby incorporated by reference for all purposes. The omission in the foregoing claims of any aspect of subject matter that is disclosed herein is not intended to forego such subject matter, nor should the inventors be construed as having contemplated such subject matter as being part of the disclosed subject matter.
Claims (9)
1. A defoaming system for a foam drainage process is characterized by comprising:
a microreactor having an input and an output; a microchannel communicated with the input port and the output port is arranged in the microreactor; the input port of the microreactor can be communicated with a wellhead to input foam fluid in a well; the microchannel is filled in the inner part of the microreactor; two adjacent microchannels are separated by microchannel walls; the thickness of the microchannel wall is not greater than the diameter of the microchannel; the input ports of the micro-reactor comprise a foam input port and a defoaming agent input port; the foam input port and the output port of the micro-reactor are respectively communicated with two ends of the micro-channel; the plurality of defoaming agent input ports are communicated with different positions of the microchannel along the extending direction of the microchannel;
the injection device is communicated with the input port of the microreactor; the injection device is used for injecting an antifoaming agent solution into the microreactor so as to enable the antifoaming agent solution to react with the foaming fluid in the microchannel; the injection device comprises a defoaming agent tank and an injection pump;
the gas-water separator is communicated with the output port of the microreactor; the gas-water separator can separate the fluid discharged from the output port of the micro-reactor into gas and liquid.
2. The defoaming system for foam drainage process as set forth in claim 1, wherein: the defoaming agent tank is used for storing defoaming agent solution, the injection pump is communicated with the defoaming agent tank, a valve is arranged between the injection pump and the defoaming agent tank, and the output end of the injection pump is communicated with the input port of the microreactor.
3. The defoaming system for foam drainage process as set forth in claim 1, wherein: the gas-water separator is provided with a gas outlet and a liquid outlet; the gas outlet is positioned above the liquid outlet.
4. The defoaming system for foam drainage process as set forth in claim 1, wherein: the diameter of the microchannel is less than 500 microns.
5. The defoaming system for foam drainage process as set forth in claim 4, wherein: the micro-channel in the micro-reactor extends spirally in the micro-reactor, and the input port and the output port of the micro-reactor are respectively communicated with two ends of the micro-channel.
6. The defoaming system for foam drainage process as claimed in any one of claims 1 to 5, wherein: also comprises foam injection equipment and an injection well; the injection well comprises an oil pipe and a casing pipe sleeved outside the oil pipe; an oil sleeve annulus is formed between the oil pipe and the sleeve; the foam injection equipment is communicated with the oil sleeve annulus, and the oil sleeve annulus is communicated with the inside of the oil pipe.
7. The defoaming system for foam drainage process as set forth in claim 6, wherein: the foam injection device comprises a foam discharging vehicle.
8. The defoaming system for foam drainage process as set forth in claim 3, wherein: and a liquid output port of the gas-water separator is communicated with the sewage pool through a pipeline.
9. The defoaming system for foam drainage process as set forth in claim 7, wherein: a valve is arranged on a pipeline between the foam discharging vehicle and the injection well; and a valve is arranged on a pipeline between the oil pipe and the microreactor.
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| CN201711383076.7A CN108245936B (en) | 2017-12-20 | 2017-12-20 | Defoaming system for foam drainage process |
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| CN201711383076.7A CN108245936B (en) | 2017-12-20 | 2017-12-20 | Defoaming system for foam drainage process |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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