Preparation method of high-pressure and high-concentration nano bubble water for oilfield water injection

Abstract

The invention relates to the technical field of micro-nano preparation methods, and particularly discloses a preparation method of high-pressure and high-concentration nano bubble water for oilfield flooding, comprising: a drug delivery module comprising a self-priming pump, a dosing tank and a high-pressure metering pump; the water delivery module comprises a water injector, a first pressure transmitter and two filter modules; the micro-channel mixer is connected with the water conveying module and the medicine conveying module; the high-concentration nano mixing module is connected with the micro-channel mixer, and the high-pressure distributor is connected with the high-concentration nano mixing module; one end of the output module is connected with the nanometer output block, and the other end of the output module is connected with the high-concentration nanometer mixing module; and the control module is used for performing control and early warning on the system. The defects that in the prior art, a nano bubble water preparation system is insufficient in safety, a preparation method is insufficient in efficiency and incomplete, and maintenance is complex when faults occur are overcome.

Description

Technical Field

[0001] The present invention relates to the field of micro-nano preparation methods, and in particular to a method for preparing high-pressure and high-concentration nano bubble water for oil field water injection. Background Art

[0002] In the middle and late stages of oil field development, water injection is the core technology for maintaining formation pressure and enhancing oil recovery (EOR).

[0003] In the existing technology, micro-nano preparation devices are usually prepared using micro-nano generators, but their preparation efficiency is insufficient and the preparation is incomplete. At the same time, the safety of their preparation systems needs to be improved. When the preparation system fails, there is also a lack of a quick positioning method for maintenance. Summary of the Invention

[0004] (1) Technical issues to be resolved The problem to be solved by the present invention is to provide a method for preparing high-pressure and high-concentration nanobubble water for oilfield water injection, so as to overcome the defects of the nanobubble water preparation system in the prior art, such as insufficient safety, insufficient efficiency and incompleteness of the preparation method, and complex maintenance in the event of a failure.

[0005] (2) Technical solution To solve the above technical problems, the first aspect of the present invention provides a method for preparing high-pressure and high-concentration nanobubble water for oilfield water injection, comprising: A drug delivery module, comprising a self-priming pump, a drug dosing tank, and a high-pressure metering pump. The drug delivery module is used to deliver liquid medicine. The drug dosing tank contains liquid medicine. The self-priming pump is used to provide power for liquid medicine transmission. The high-pressure metering pump is used to frequency-control the flow rate of the liquid medicine. A water delivery module, comprising a water injector, a first pressure transmitter, and two filter modules, the two filter modules being connected in parallel, each filter module comprising a first filter and a second filter, the first filter being connected to the second filter, the water injector, the first pressure transmitter, and the filter modules being connected in sequence, the water delivery module being used to deliver water; a microchannel mixer, the microchannel mixer being connected to the water delivery module and the drug delivery module respectively, the drug solution and the water flow being mixed in the microchannel mixer, and the microchannel mixer being connected to a high-pressure distributor; A high-concentration nano-mixing module, the high-concentration nano-mixing module is connected to the microchannel mixer, the high-concentration nano-mixing module includes a nano-mixing tank and a micro-nano generator, a high-pressure distributor is connected to the micro-nano generator, and the nano-mixing tank is connected to the micro-nano generator; an output module, one end of which is connected to the nano output block, and the other end of which is connected to the high-concentration nano mixing module, wherein the high-concentration nano mixing module outputs micro-nano bubble water to the nano output block via the output module; a fault channel is provided between the water injector and the first pressure transmitter, wherein the fault channel is connected to the nano output block; A control module is used to control and warn the system.

[0006] As described above, in the method for preparing nano bubble water, optionally, the output module includes a pressure gauge, a sample valve, an electromagnetic flowmeter, a safety valve, a high-pressure check valve, and a third pressure transmitter connected in sequence. The pressure gauge is used to measure the pressure of the micro-nano bubble water output by the high-concentration nano-mixing module. The third pressure transmitter is connected to the nano output block.

[0007] As described above in the method for preparing nanobubble water, optionally, the sample valve is connected to a sample tube, and the sample valve and the sample tube are used for sampling.

[0008] As described above in the method for preparing nano bubble water, optionally, a high-pressure shut-off valve is connected between the third pressure transmitter and the nano output block.

[0009] As described above in the method for preparing nano bubble water, optionally, the first pressure transmitter, the pressure gauge, the electromagnetic flowmeter and the third pressure transmitter are connected to the control module and transmit detection signals to the control module.

[0010] As described above in the method for preparing nanobubble water, optionally, when the control module detects that the data of the first pressure transmitter, the pressure gauge, the electromagnetic flowmeter, and the third pressure transmitter are not within a normal threshold range or the data have abnormal mutations, the control module issues an alarm.

[0011] As described above, in the method for preparing nano bubble water, optionally, an electromagnetic opening and closing valve is provided on the fault channel, and the electromagnetic opening and closing valve is connected to the control module. When the control module detects data abnormality, the electromagnetic opening and closing valve opens, and the water injector outputs water to the nano output block.

[0012] As described above in the method for preparing nanobubble water, optionally, there are two drug delivery modules, and both of the drug delivery modules are connected in parallel to the microchannel mixer.

[0013] As described above in the method for preparing nano bubble water, optionally, the micro-nano generator is connected to a nitrogen generator, and the nitrogen generator provides nitrogen to the micro-nano generator through a gas distributor, and the nitrogen is mixed with the mixed liquid distributed by the high-pressure distributor.

[0014] (3) Beneficial effects The present invention provides a method for preparing high-pressure and high-concentration nanobubble water for oilfield water injection, which has the following beneficial effects: The present invention combines a drug delivery module and a water delivery module in a microchannel mixer to form a mixed water solution. This mixed water is then distributed to each high-concentration nano-mixing module via a high-pressure distributor. A nitrogen generator delivers nitrogen to each high-concentration nano-mixing module via a gas distributor. The nitrogen and the mixed solution are then mixed in the micro-nano generator and fed into a nano-mixing tank. The nano-output block in the nano-mixing tank then outputs the liquid. This method allows for the mixing of drug solution, water flow, and nitrogen, thereby completing the preparation of a specific micro-nano mixed solution.

[0015] The present invention uses a control module to generate an alarm when data from the first pressure transmitter, pressure gauge, electromagnetic flowmeter, and third pressure transmitter falls outside the normal threshold range or changes suddenly or abnormally. When an alarm occurs, a solenoid valve connected to the control module is installed in the fault channel. When the control module detects a data anomaly, the valve opens, allowing the water injector to deliver water to the nanometer output block. This approach ensures safe system operation and allows for rapid location and repair of system failures. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0017] Figure 1 This is a stereoscopic diagram of a method for preparing high-pressure and high-concentration nanobubble water for oilfield water injection according to the present invention.

[0018] The names of the components corresponding to the various figure marks in the figure are: 1. drug delivery module; 11. self-priming pump; 12. dosing tank; 13. high-pressure metering pump; 2. water delivery module; 21. water injector; 22. first pressure transmitter; 23. filter module; 24. first filter; 25. second filter; 3. microchannel mixer; 4. high-concentration nano-mixing module; 41. nano-mixing tank; 42. micro-nano generator; 43. high-pressure distributor; 5. output module; 51. nano output block; 52. fault channel; 53. pressure gauge; 54. sample valve; 55. electromagnetic flowmeter; 56. safety valve; 57. high-pressure check valve; 58. third pressure transmitter; 59. sample tube; 6. control module; 61. high-pressure stop valve; 62. electromagnetic opening and closing valve; 63. nitrogen generator; 64. gas distributor. DETAILED DESCRIPTION

[0019] The present application is described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] The following describes the embodiments of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, in the absence of conflict, the features in the following embodiments and embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative work are within the scope of protection of this application.

[0021] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on this application, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspect described herein can be used to implement an apparatus and / or practice a method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this apparatus and / or practice this method.

[0022] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application. The illustrations only show components related to the present application and are not drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component can be changed at will, and the component layout type may also be more complicated.

[0023] Additionally, in the following description, specific details are provided to provide a thorough understanding of the examples, however, one skilled in the art will appreciate that the examples can be practiced without these specific details.

[0024] The following describes the technical solutions provided by various embodiments of the present application in conjunction with the accompanying drawings.

[0025] See Figure 1The present invention provides a method for preparing high-pressure, high-concentration nanobubble water for oilfield water injection, comprising: a drug delivery module 1, a water delivery module 2, a microchannel mixer 3, a high-concentration nanobubble mixing module 4, an output module 5, and a nitrogen generator 63. The drug delivery module 1 and the water delivery module are mixed in the microchannel mixer 3 to form a mixed solution. The mixed solution is then distributed to the high-concentration nanobubble mixing module 4 and combined with the nitrogen generator 63 to produce a nitrogen-filled mixed solution. The nitrogen-filled mixed solution generates micro-nano bubbles under the action of the micro-nano generator 42, which are then stored in the nanobubble mixing tank 41.

[0026] exist Figure 1 In an optional embodiment, the drug delivery module 1 includes a self-priming pump 11, a dosing tank 12 and a high-pressure metering pump 13. The drug delivery module 1 is used to transport the drug solution. The dosing tank 12 contains the drug solution. The self-priming pump 11 is used to provide power for the drug solution transmission, and the high-pressure metering pump 13 is used to frequency-control the flow rate of the drug solution.

[0027] Furthermore, there are two drug delivery modules 1, and both drug delivery modules 1 are connected in parallel to the microchannel mixer 3. Multiple drug delivery modules 1 can accelerate the drug delivery rate and speed up the mixing speed of the drug solution and the water flow.

[0028] exist Figure 1 In an optional embodiment, the water delivery module 2 includes a water injector 21, a first pressure transmitter 22 and two filter modules 23. The two filter modules 23 are connected in parallel. Each filter module 23 includes a first filter 24 and a second filter 25. The first filter 24 is connected to the second filter 25. The water injector 21, the first pressure transmitter 22 and the filter module 23 are connected in sequence. The water delivery module 2 is used to deliver water.

[0029] Among them, there can be multiple filter modules 23, and multiple filter modules 23 are connected in parallel. The filter modules 23 connected in parallel can filter multiple water flows synchronously. Each filter module 23 has a first filter 24 and a second filter 25. The first filter 24 is used for preliminary filtering of the water flow, and the second filter 25 is used for secondary filtering of the water flow, which can better purify the water flow.

[0030] It should be noted that the water injector 21 is used to provide water flow.

[0031] exist Figure 1 In an optional embodiment, the microchannel mixer 3 is connected to the water delivery module 2 and the drug delivery module 1 respectively, and the drug solution and water flow are mixed in the microchannel mixer 3, and the microchannel mixer 3 is connected to the high-pressure distributor 43. The high-pressure distributor 43 can distribute the drug solution mixture.

[0032] Furthermore, the high-concentration nano-mixing module 4 is connected to the microchannel mixer 3 , and includes a nano-mixing tank 41 and a micro-nano generator 42 . The high-pressure distributor 43 is connected to the micro-nano generator 42 . The nano-mixing tank 41 and the micro-nano generator 42 are connected.

[0033] Among them, there are multiple high-concentration nano-mixing modules 4, each high-concentration nano-mixing module 4 is connected to a high-pressure distributor 43, and the high-pressure distributor 43 distributes gas to each high-concentration nano-mixing module 4. A nitrogen generator 63 is connected to the micro-nano generator 42 of each high-concentration nano-mixing module 4. The nitrogen generator 63 provides nitrogen to the micro-nano generator 42 through a gas distributor 64. The nitrogen is mixed with the mixed liquid distributed by the high-pressure distributor 43 to form a nitrogen-potion mixed liquid, which is placed in the nano-mixing tube.

[0034] At the same time, one end of the output module 5 is connected to the nano output block 51, and the other end of the output module 5 is connected to the high-concentration nano mixing module 4. The high-concentration nano mixing module 4 outputs micro-nano bubble water to the nano output block 51 through the output module 5. A fault channel 52 is provided between the water injector 21 and the first pressure transmitter 22, and the fault channel 52 is connected to the nano output block 51.

[0035] Furthermore, the output module 5 includes a pressure gauge 53, a sample valve 54, an electromagnetic flowmeter 55, a safety valve 56, a high-pressure check valve 57 and a third pressure transmitter 58 connected in sequence. The pressure gauge 53 is used to measure the pressure of the micro-nano bubble water output by the high-concentration nano-mixing module 4, and the third pressure transmitter 58 is connected to the nano output block 51.

[0036] Furthermore, the sample valve 54 is connected to a sample tube 59 , and the sample valve 54 and the sample tube 59 are used for sampling.

[0037] Furthermore, a high-pressure shut-off valve 61 is connected between the third pressure transmitter 58 and the nanometer output block 51 .

[0038] Furthermore, the first pressure transmitter 22 , the pressure gauge 53 , the electromagnetic flowmeter 55 and the third pressure transmitter 58 are connected to the control module 6 and transmit detection signals to the control module 6 .

[0039] exist Figure 1 In an optional embodiment, the control module 6 is used to control the system and provide early warning.

[0040] Specifically, when the control module 6 detects that the data of the first pressure transmitter 22 , the pressure gauge 53 , the electromagnetic flowmeter 55 and the third pressure transmitter 58 are not within the normal threshold range or the data change abnormally, the control module 6 issues an alarm.

[0041] At this time, an electromagnetic opening and closing valve 62 is provided on the fault channel 52, and the electromagnetic opening and closing valve 62 is connected to the control module 6. When the control module 6 detects data abnormality, the electromagnetic opening and closing valve 62 opens, and the water injector 21 outputs water to the nano output block 51.

[0042] In summary, the present invention provides a method for preparing high-pressure, high-concentration nanobubble water for oilfield water injection, and the specific steps are as follows: S1: The water injector 21 is started, the self-priming pump 11 is started, the water flow and the liquid medicine are mixed in the microchannel mixer 3 , and the mixed liquid in the microchannel mixer 3 is distributed to each high-concentration nano-mixing module 4 by the high-pressure distributor 43 .

[0043] S2: The nitrogen generator 63 delivers nitrogen to each high-concentration nano-mixing module 4 through the gas distributor 64 . The nitrogen is mixed with the mixed liquid in the micro-nano generator 42 and the micro-nano liquid is input into the nano-mixing tank 41 .

[0044] S3: The nano-mixing tank 41 and the nano-output block 51 output the liquid.

[0045] S4: When the control module 6 detects data anomalies, it sends an alarm to the outside world, and at the same time the fault channel 52 is opened, and the water flow in the water injector 21 is output from the nano output block 51.

[0046] The same or similar parts between the various embodiments in this specification can be referred to each other, and each embodiment focuses on the differences from other embodiments.

[0047] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A method for preparing high-pressure and high-concentration nanobubble water for oilfield water injection, characterized in that: include: A drug delivery module (1), the drug delivery module (1) comprising a self-priming pump (11), a drug dosing tank (12) and a high-pressure metering pump (13), the drug delivery module (1) being used for delivering drug liquid, the drug dosing tank (12) containing drug liquid, the self-priming pump (11) being used for providing power for drug liquid transmission, and the high-pressure metering pump (13) being used for frequency conversion to adjust the flow rate of drug liquid; A water delivery module (2), the water delivery module (2) comprising a water injector (21), a first pressure transmitter (22) and two filter modules (23), the two filter modules (23) being connected in parallel, each filter module (23) comprising a first filter (24) and a second filter (25), the first filter (24) being connected to the second filter (25), the water injector (21), the first pressure transmitter (22) and the filter modules (23) being connected in sequence, and the water delivery module (2) being used for delivering water; A microchannel mixer (3), the microchannel mixer (3) being connected to the water delivery module (2) and the drug delivery module (1) respectively, the drug solution and the water flow being mixed in the microchannel mixer (3), and the microchannel mixer (3) being connected to a high-pressure distributor (43); A high-concentration nano-mixing module (4), the high-concentration nano-mixing module (4) is connected to the microchannel mixer (3), the high-concentration nano-mixing module (4) includes a nano-mixing tank (41) and a micro-nano generator (42), a high-pressure distributor (43) is connected to the micro-nano generator (42), and the nano-mixing tank (41) and the micro-nano generator (42) are connected; An output module (5), one end of the output module (5) is connected to the nano output block (51), and the other end of the output module (5) is connected to the high-concentration nano mixing module (4), and the high-concentration nano mixing module (4) outputs micro-nano bubble water to the nano output block (51) through the output module (5), and a fault channel (52) is provided between the water injector (21) and the first pressure transmitter (22), and the fault channel (52) is connected to the nano output block (51); A control module (6) is used to control the system and provide early warning.

2. The method for preparing nano bubble water according to claim 1, wherein The output module (5) comprises a pressure gauge (53), a sample valve (54), an electromagnetic flowmeter (55), a safety valve (56), a high-pressure check valve (57), and a third pressure transmitter (58) which are connected in sequence. The pressure gauge (53) is used to measure the pressure of the micro-nano bubble water output by the high-concentration nano-mixing module (4). The third pressure transmitter (58) is connected to the nano output block (51).

3. The method for preparing nano bubble water according to claim 2, wherein: The sample valve (54) is connected to a sample tube (59), and the sample valve (54) and the sample tube (59) are used for sampling.

4. The method for preparing nano bubble water according to claim 2, wherein: A high-pressure shut-off valve (61) is connected between the third pressure transmitter (58) and the nanometer output block (51).

5. The method for preparing nano bubble water according to claim 2, wherein: The first pressure transmitter (22), the pressure gauge (53), the electromagnetic flowmeter (55), and the third pressure transmitter (58) are connected to the control module (6) and transmit detection signals to the control module (6).

6. The method for preparing nano bubble water according to claim 5, wherein: When the control module (6) detects that the data of the first pressure transmitter (22), the pressure gauge (53), the electromagnetic flowmeter (55), and the third pressure transmitter (58) are not within the normal threshold range or the data have abnormal mutations, the control module (6) issues an alarm.

7. The method for preparing nano bubble water according to claim 6, wherein: The fault channel (52) is provided with an electromagnetic on-off valve (62), which is connected to the control module (6). When the control module (6) detects data abnormality, the electromagnetic on-off valve (62) opens, and the water injector (21) outputs water to the nano output block (51).

8. The method for preparing nano bubble water according to claim 1, wherein: There are two drug delivery modules (1), and both of the two drug delivery modules (1) are connected in parallel to the microchannel mixer (3).

9. The method for preparing nano bubble water according to claim 1, wherein: The micro-nano generator (42) is connected to a nitrogen generator (63), and the nitrogen generator (63) provides nitrogen to the micro-nano generator (42) through a gas distributor (64), and the nitrogen is mixed with the mixed liquid distributed by the high-pressure distributor (43).

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