CN112211603B - Stratified water injection system and control method thereof - Google Patents
Stratified water injection system and control method thereof Download PDFInfo
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- CN112211603B CN112211603B CN201910628767.1A CN201910628767A CN112211603B CN 112211603 B CN112211603 B CN 112211603B CN 201910628767 A CN201910628767 A CN 201910628767A CN 112211603 B CN112211603 B CN 112211603B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 228
- 238000002347 injection Methods 0.000 title claims abstract description 70
- 239000007924 injection Substances 0.000 title claims abstract description 70
- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000012530 fluid Substances 0.000 claims abstract description 61
- 238000004891 communication Methods 0.000 claims description 7
- 230000001276 controlling effect Effects 0.000 description 11
- 230000001105 regulatory effect Effects 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 5
- 239000000243 solution Substances 0.000 description 3
- 238000007689 inspection Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/20—Displacing by water
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Abstract
The invention provides a layered water injection system and a control method thereof, wherein the layered water injection system comprises: the generator is internally provided with a first flow passage for fluid to pass through; the side wall of the first flow channel is provided with an adjusting part which is used for adjusting the flow of the fluid so as to generate a first flow wave and enable the first flow wave to be transmitted through the fluid; the controller is connected with the adjusting part and is used for controlling the adjusting part so as to encode the first flow wave and load a control instruction on the first flow wave; a water distributor disposed within the wellbore; the water distributor is communicated with the first flow passage; the water distributor is used for receiving the first flow wave and judging whether water is injected or not according to the control instruction in the first flow wave. The embodiment of the invention provides a stratified water injection system capable of reducing operation cost and a control method thereof.
Description
Technical Field
The invention relates to the technical field of petroleum production, in particular to a layered water injection system and a control method thereof.
Background
A stratified water injection system may be used to cause a water distributor within a water injection well to perform a water distribution action. The layered water injection system in the prior art comprises a layered water injection system which communicates through a cable and a layered water injection system which communicates through pressure waves.
The layered water injection system communicating through the cable comprises an intelligent water distributor arranged in a water injection well and a ground system electrically connected with the intelligent water distributor through the cable. The cable is pre-arranged outside the oil pipe so as to be lowered into a water injection well along with the pipe column. Because the oil pipe is easy to rotate or radially displace in the running process, and the cable has flexibility, the cable is easy to wind on the oil pipe when the oil pipe rotates. When the oil pipe is displaced radially, the cable is easy to rub against the wall of the sleeve, so that the cable is damaged. Due to the fact that cables are difficult to enter the layered water injection system which carries out communication through the cables, operation cost is high.
The zonal injection system which carries out communication through pressure waves uses a ground fracturing truck as a remote control tool, the time interval of water injection and water drainage is controlled by injecting water into a shaft to cause pressure change in the shaft, so that pressure wave communication signals are formed, and a pressure sensor in the water injection well senses the pressure change signals and carries out signal identification processing. The zonal injection system communicating by pressure waves needs to use a ground fracturing truck as a remote control tool. When the fracturing truck is operated, the inspection before starting is firstly needed, and the inspection mainly comprises the following steps: chassis, fuel tank, bench engine, lift-down engine, hydraulic tank, instrument box, torque converter, plunger pump, transmission shaft, radiator, etc.; the program is then started and a post-start check is then required. Therefore, the operation of the stratified water injection system for communication through pressure waves is complex, and the operation cost is high.
Disclosure of Invention
The invention aims to provide a stratified water injection system capable of reducing operation cost and a control method thereof.
The above object of the present invention can be achieved by the following technical solutions: a stratified water injection system comprising: the generator is internally provided with a first flow passage for fluid to pass through; the side wall of the first flow channel is provided with an adjusting part which is used for adjusting the flow of the fluid so as to generate a first flow wave and enable the first flow wave to be transmitted through the fluid; the controller is connected with the adjusting part and is used for controlling the adjusting part so as to encode the first flow wave and load a control instruction on the first flow wave; a water distributor disposed within the wellbore; the water distributor is communicated with the first flow passage; the water distributor is used for receiving the first flow wave and judging whether water is injected or not according to the control instruction in the first flow wave.
In a preferred embodiment, the generator is an electrically controlled valve or a variable frequency electrically controlled pump.
As a preferred embodiment, the method further comprises: the first flow passage is communicated with the water source so that the injected water can be injected into a target oil layer through the water distributor and can be used as a medium for transmitting the first flow wave.
As a preferred embodiment, a second flow passage for passing the fluid is arranged in the water distributor; the side wall of the second flow channel is provided with a control part, and the control part is used for controlling the flow rate of the fluid to form a second flow wave and encoding the second flow wave, so that feedback information can be loaded on the second flow wave, and the second flow wave can be transmitted through the fluid.
As a preferred implementation, a first flow meter is arranged between the generator and the water distributor, the first flow meter is connected to the controller, and the first flow meter is configured to receive the second flow wave and upload the feedback information in the second flow wave to the controller.
As a preferred embodiment, a second flow meter is arranged on the water distributor, and the second flow meter is configured to receive the first flow wave and upload a control command in the first flow wave to the water distributor, so that the water distributor can inject water according to the control command.
As a preferred embodiment, the wellbore is plural; the generators are multiple, and a plurality of wellbores correspond to the generators; the first flow passage of each generator is in communication with the water distributor in the corresponding wellbore.
A method of controlling a stratified water injection system, comprising: the controller controls the adjusting part to enable a first flow wave to be generated in the first flow channel, encodes the first flow wave and loads a control command on the first flow wave; and the water distributor receives the first flow wave and judges whether to inject water according to the control instruction in the first flow wave.
As a preferred embodiment, the step of receiving, by the water distributor, the first flow wave, and determining whether to inject water according to the control instruction in the first flow wave specifically includes: the second flow meter receives the first flow wave and acquires the control command in the first flow wave; uploading the control instruction to the water distributor; the water distributor acquires the position information of a target oil layer in the control instruction; the water distributor judges whether the position information of the target oil layer is consistent with the position of the oil layer where the target oil layer is located; and when the position information of the target oil layer is consistent with the position of the oil layer where the target oil layer is located, the water distributor injects water to the target oil layer.
As a preferred embodiment, the step of the water distributor judging whether the level information of the target oil layer is consistent with the level of the oil layer where the target oil layer is located further includes: and when the position information of the target oil layer is inconsistent with the position of the oil layer where the target oil layer is located, closing the water distributor to avoid injecting water into the oil layer where the target oil layer is located.
The application provides a water injection system and a control method thereof, which has the beneficial effects that: when the stratified water injection system and the control method thereof are used for carrying out stratified water injection, a first flow wave is generated by a generator and is conveyed by fluid, and a control instruction is loaded on the first flow wave by a controller, so that a water distributor can receive the first flow wave and judge whether to carry out water injection according to the control instruction in the first flow wave. Thus, the fluid is used as a medium for transmitting the control command; the first traffic wave serves as a means for controlling the transmission of the command. Therefore, the stratified water injection system does not need to use large-scale equipment such as a fracturing truck, and does not need to use a cable to connect the water distributor in the water injection well with ground equipment, so that the equipment investment cost and the maintenance and use cost can be reduced. Therefore, the invention provides a stratified water injection system capable of reducing the operation cost and a control method thereof.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a stratified water injection system provided in one embodiment of the present invention;
FIG. 2 is a flow chart of a method for controlling a stratified water injection system according to an embodiment of the present invention.
Description of reference numerals:
11. a water source; 13. a controller; 15. a water distributor; 17. a pressure sensor; 19. a first flow meter; 21. a generator; 25. a switch; 27. an input end; 31. an output end; 33. an adjustment section; 35. a wellbore; 37. an access end; 39. and an output end is connected.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Please refer to fig. 1. An embodiment of the present application provides a stratified water injection system, which may include: the generator 21 is provided with a first flow passage for fluid to pass through in the generator 21; an adjusting part 33 is arranged on the side wall of the first flow channel, and the adjusting part 33 is used for adjusting the flow rate of the fluid so as to generate a first flow wave and enable the first flow wave to be transmitted through the fluid; a controller 13, wherein the controller 13 is connected to the adjusting unit 33, and the controller 13 is configured to control the adjusting unit 33 so as to encode the first traffic wave and load a control instruction on the first traffic wave; a water distributor 15 disposed within the wellbore 35; the water distributor 15 is communicated with the first flow passage; the water distributor 15 is configured to receive the first flow wave, and determine whether to inject water according to the control instruction in the first flow wave.
When in use, the flow rate of the fluid is firstly adjusted through the adjusting part 33 to generate a first flow wave and enable the first flow wave to be transmitted through the fluid; then, the controller 13 controls the adjusting unit 33 so as to encode the first flow wave and load the control command on the first flow wave; and finally, the water distributor 15 receives the first flow wave and judges whether water injection is carried out or not according to a control instruction in the first flow wave.
The technical scheme shows that: when the stratified water injection system according to the embodiment of the present application performs stratified water injection, the generator 21 generates a first flow wave and transmits the first flow wave through fluid, and the controller 13 loads a control instruction on the first flow wave, so that the water distributor 15 can receive the first flow wave and determine whether to perform water injection according to the control instruction in the first flow wave. I.e. the control command can be loaded on the first flow wave and the first flow wave can be transmitted to the water distributor 15 by the fluid. The water distributor 15 is capable of recognizing the control signal within the first flow wave and of injecting water according to the control signal. Thus, the fluid is used as a medium for transmitting the control command; the first traffic wave serves as a means for controlling the transmission of the command. Therefore, the separate zone water injection system of the embodiment of the application does not need to use large-scale equipment such as a fracturing truck, and does not need to use a cable to connect the water distributor 15 in the water injection well with surface equipment, so that the equipment investment cost and the maintenance and use cost can be reduced.
In the present embodiment, the generator 21 is provided with a first flow passage through which a fluid passes. Specifically, the generator 21 has a housing. The first flow passage is disposed in the housing. Further, the housing is provided with an input end 27 and an output end 31 communicating with the first flow passage. The input 27 is used for fluid input. The output 31 is used for fluid output. This allows fluid to flow into the first flow passage through the input end 27 and out of the first flow passage through the output end 31. As shown in fig. 1, the input 27 is located on the upper side of the generator 21. The output 31 is located on the underside of the generator 21.
Further, a valve may be disposed in the first flow passage. The valve may be used to open and close input 27. So that when the valve opens the input 27, fluid can flow into the first flow passage through the input 27. When the valve closes input 27, fluid cannot flow into the first flow passage through input 27.
Further, an adjusting portion 33 is provided on a side wall of the first flow passage. Specifically, the adjustment portion 33 may be provided on the housing. As shown in fig. 1, the regulating portion 33 is located on the right side of the generator 21.
Further, the regulating portion 33 is configured to regulate the flow rate of the fluid to generate a first flow wave and enable the first flow wave to be transmitted through the fluid. Specifically, the adjusting portion 33 is used to adjust the opening of the valve so that the flow rate of the fluid passing through the input port 27 can be changed. For example, as the opening of the valve increases, the flow rate of fluid through the input 27 will increase. When the opening of the valve is smaller, the flow of fluid through the input 27 will be smaller. And the change in flow from high to low may be indicated by a "1". The change in flow from low to high may be indicated by a "0". A string of numbers representing 0 or 1 can be formed when the flow rate of the fluid is changed. This generates a first flow wave when the flow rate of the fluid changes. And the first flow wave is formed by the flow rate change of the fluid, so that the first flow wave can be transmitted forward when the fluid flows forward. I.e. the first flow wave can be transmitted through the fluid.
Further, the generator 21 may be an electrically controlled valve or a variable frequency electrically controlled pump.
In the present embodiment, the controller 13 is connected to the adjustment section 33. The connections are electrical connections. The controller 13 is configured to control the adjustment unit 33 so as to encode the first flow rate wave and to apply a control command to the first flow rate wave. That is, the controller 13 is configured to control the operation of the adjustment unit 33, so that the adjustment unit 33 controls the opening of the valve to control the change of the fluid flow rate. The change of the fluid flow can form a string of numbers representing 0 or 1, so that the change of the fluid flow is controlled, namely the first flow wave can be encoded, and the control command is loaded on the first flow wave. Further, the control command may be set according to conditions of the downhole reservoir.
Further, the controller 13 is provided with an operation end for a user to input a control command. So that the user can load the control instruction on the first flow wave through the operation end.
Further, the control instructions include level information of the target oil layer and control information for controlling the water distributor 15 of the target oil layer. So that control of the water distributor 15 in the target oil reservoir can be achieved by means of the control instructions.
In particular, the horizon information indicates the horizon of the target reservoir. For example, to represent the horizon of 15 reservoirs downhole, the horizon information may be represented using 4-bit digital codes. When the 4-bit digital code is 0001 to 1111, any one of the digital codes 0001 to 1111 is used to represent the level of any one of the 15 oil layers. When the 4-bit digital code is 0000, the 4-bit digital code represents all of the 15 oil layers.
Specifically, the control information may be an instruction for driving the water nozzle of the water distributor 15 of the target oil layer. For example, the control information is an instruction of the opening degree of the water nozzle. Further, the control information may be represented using 12-bit digital encoding. Of course, if more information is desired, a more bit digitally encoded representation may be used. This application is not intended to be limited thereto. Of course, the control information is not limited to the instruction for driving the water nozzle of the water distributor 15 of the target oil layer. Other control instructions are also possible. Such as instructions for informing the water distributor 15 of the target reservoir to upload downhole monitored data. This application is not intended to be limited thereto.
Further, the controller 13 is disposed on the ground. Therefore, the remote monitoring and control of the separated layer water injection can be conveniently carried out by operators, and the maintenance and use cost is reduced.
Further, the controller 13 may be a computer or a palm device.
In the present embodiment, an oil reservoir is provided in the wellbore 35. The water distributor 15 is disposed within the wellbore 35. The water distributor 15 communicates with the first flow passage. Specifically, as shown in FIG. 1, a tubing string is disposed through the wellbore 35. The water distributor 15 is arranged on the pipe string. The upper end of the string is connected to the output 31 of the generator 21. So that fluid in the first flow passage can flow into the tubing string. And fluid in the string can flow into the at least one water distributor 15.
Further, the water distributor 15 is used for injecting water into an oil reservoir in the wellbore 35. And the number of oil zones in the wellbore 35 is equal to the number of water distributors 15. Specifically, when there is only one reservoir in the wellbore 35. The number of the water distributors 15 is 1. When there are multiple reservoirs in the wellbore 35, there are multiple water distributors 15. And a plurality of water distributors 15 correspond to the plurality of oil layers, each water distributor 15 being disposed in a corresponding oil layer. For example, as shown in fig. 1, 4 zones are provided in the wellbore 35. The number of water distributors 15 is therefore 4. The 4 water distributors 15 are located in the 4 oil layers, respectively.
Further, the water distributor 15 is configured to receive the first flow wave, and determine whether to inject water according to a control command in the first flow wave. That is, the water distributor 15 can receive the first flow wave and can identify the control commands within the first flow wave. The level information of the target oil layer within the control command and the control information for controlling the water distributor 15 of the target oil layer are thus acquired. And then whether to carry out water injection can be judged according to the control instruction. The purpose of water distribution through the flow wave control water distributor 15 is achieved in this way. The separate zone water injection system does not need to use large-scale equipment such as a fracturing truck, and does not need to use a cable to connect the water distributor 15 in the water injection well with ground equipment, so that the equipment investment cost and the maintenance and use cost can be reduced.
Further, since the water distributors 15 are all communicated with the first flow passage, the fluid in the first flow passage can flow into the water distributor 15. The water distributor 15 is able to receive the first flow wave transmitted through the fluid.
Further, a second flow meter is provided on the water distributor 15. The second flowmeter is configured to receive the first flow wave and upload a control command in the first flow wave to the water distributor 15, so that the water distributor 15 can inject water according to the control command. I.e. the second flow meter can be used to decode the control instructions in the first flow wave and transmit the decoded control instructions to the water distributor 15. In particular, it is arranged upstream of the distributor 15 in the direction of transmission of the first flow wave. I.e. the first flow wave passes the second flow meter before flowing into the water distributor 15. Then, when water injection is required, the fluid carrying the first flow wave enters the water distributor 15 to inject water.
In one embodiment, a second flow passage is provided within the water distributor 15 for passage of fluid. The side wall of the second flow passage is provided with a control part. The control part is used for controlling the flow of the fluid to form a second flow wave and encoding the second flow wave, so that the feedback information can be loaded on the second flow wave, and the second flow wave can be transmitted through the fluid. I.e. the water distributor 15, is also used to generate the second flow wave. And the feedback information can be loaded on the second flow wave through the control part. The feedback information may be a parameter monitored downhole. For example: flow data, pressure data, temperature data, etc. No provision is made for this application. I.e., data monitored downhole may be transmitted by the fluid within the water distributor 15. Thus when a surface operator requires downhole data, control commands may first be sent by the generator 21. The water distributor 15 can also upload downhole monitored data to the surface in accordance with the control instructions. Of course, the water distributor 15 is not limited to uploading the data monitored downhole to the surface according to the control command, and the water distributor 15 itself may actively upload the data monitored downhole to the surface. This application is not intended to be limited thereto.
Further, a first flow meter 19 is arranged between the generator 21 and the water distributor 15, the first flow meter 19 is connected with the controller 13, and the first flow meter 19 is used for receiving the second flow wave and uploading feedback information in the second flow wave to the controller 13. Specifically, the first flow meter 19 can be used to decode the feedback information within the second flow wave and transmit the decoded feedback information to the controller 13.
As shown in fig. 1, the stratified water injection system according to the embodiment of the present application further includes a water source 1111. The water source 11 is used to provide injection water. In particular, the water source 11 may be transported through a first pipeline. For example, as shown in fig. 1, the left end of the first line is used for input of injection water. So that the injection water can be transported through the first line into the respective wellbore 35.
Further, the first flow passage is communicated with a water source 11. So that the injection water can be injected into the target oil layer through the water distributor 15 and can be used as a medium for transmitting the first flow wave. Specifically, as shown in FIG. 1, the input 27 of the generator 21 communicates with the right end of the first line. So that the injection water can flow into the first flow passage through the first line. Since the water distributor 15 is communicated with the first flow passage, the injection water can flow into the water distributor 15 through the first flow passage and can be injected into the target oil layer through the water distributor 15. Further, since the regulating portion 33 can regulate the flow rate of the fluid to generate the first flow wave and transmit the first flow wave through the fluid, the injected water can be flow-regulated by the regulating portion 33 to generate the first flow wave and transmitted through the injected water when passing through the first flow passage. And the controller 13 can control the adjusting part 33 so that the first flow wave can be encoded and the control command can be applied to the first flow wave, the controller 13 can apply the control command to the first flow wave, and therefore the injected water can be injected into the target oil layer through the water distributor 15 on the one hand and can be used as a medium for transmitting the first flow wave on the other hand.
In one embodiment, the wellbore 35 is multiple. The generator 21 is plural. A plurality of wellbores 35 corresponding to the plurality of generators 21; the first flow path of each generator 21 communicates with the water distributor 15 in the corresponding wellbore 35. For example, as shown in fig. 1, there are 4 wellbores 35. The number of generators 21 is 4. Each generator 21 is in communication with a water distributor 15 in a well bore 35.
Further, the stratified water injection system provided by an embodiment of the present application may further include: switch 2525. The switch 25 has an ingress 37 and a plurality of outages 39; the input end 37 is connected to the controller 13, a plurality of output ends 39 correspond to the plurality of generators 21, and each output end 39 is connected to the regulating portion 33 of the corresponding generator 21. Thus, through the exchanger 25, the controller 13 can control each of the water distributors 15 in the plurality of wellbores 35, thus achieving centralized control of stratified water injection. Specifically, as shown in fig. 1, the number of the tap-off ends 39 is 4. The 4 output terminals 39 are connected to the 4 generators 21, respectively. So that the controller 13 can control the water distributors 15 in the 4 wellbores 35 through the switch 25.
In one embodiment, a pressure sensor 17 is disposed between the generator 21 and the water source 11, the pressure sensor 17 is connected to the controller 13, and the controller 13 is configured to obtain a pressure signal detected by the pressure sensor 17. Specifically, as shown in fig. 1, the upper end of the pressure sensor 17 is connected to the right end of the first pipeline. The lower end of the pressure sensor 17 is connected to an input 27 of the generator 21. So that the pressure sensor 17 can detect the pressure of the fluid entering the first flow passage. And the pressure sensor 17 can upload the fluid pressure to the controller 13.
Please refer to fig. 2. The control method for the stratified water injection system provided by the application can comprise the following steps: step S11: the controller 13 controls the adjusting unit 33 to generate a first flow wave in the first flow channel, encode the first flow wave, and load a control command on the first flow wave; step S13: the water distributor 15 receives the first flow wave, and determines whether to inject water according to the control instruction in the first flow wave.
The technical scheme shows that: in the method for controlling a stratified water injection system according to the embodiment of the present application, when stratified water injection is performed, the generator 21 generates a first flow wave and transmits the first flow wave through fluid, and the controller 13 loads a control instruction on the first flow wave, so that the water distributor 15 can receive the first flow wave and determine whether to perform water injection according to the control instruction in the first flow wave. I.e. the control command can be loaded on the first flow wave and the first flow wave can be transmitted to the water distributor 15 by the fluid. The water distributor 15 is capable of recognizing the control signal within the first flow wave and of injecting water according to the control signal. Thus, the fluid is used as a medium for transmitting the control command; the first traffic wave serves as a means for controlling the transmission of the command. Therefore, the zonal injection system of the embodiment of the application does not need to use large-scale equipment such as a fracturing truck, and does not need to use a cable to connect the water distributor 15 in the injection well with surface equipment, so that the equipment investment cost and the maintenance and use cost can be reduced.
In the present embodiment, step S11: the controller 13 controls the adjusting unit 33 so that the first flow wave can be generated in the first channel, encodes the first flow wave, and loads the control command on the first flow wave. Specifically, as shown in the drawing, the regulating portion 33 of the generator 21 is first opened to allow the injection water to flow into the first flow passage through the first line. Then, the controller 13 operates the adjusting portion 33 to adjust the opening of the valve, so that the flow rate of the fluid in the first flow channel can be changed, and further, a first flow wave is generated, encoded, and a control command is loaded on the first flow wave.
In the present embodiment, step S13: the water distributor 15 receives the first flow wave and judges whether to inject water according to the control instruction in the first flow wave.
Further, step S13, the water distributor 15 receives the first flow wave, and determines whether to inject water according to the control instruction in the first flow wave, which specifically includes:
step S131: the second flow meter receives the first flow wave and acquires a control instruction in the first flow wave; and uploads control instructions to the water distributor 15. That is, the second flow meter can decode the control command in the first flow wave and upload the decoded control command to the water distributor 15.
Step S133: the water distributor 15 obtains the level information of the target oil layer within the control commands. For example, the level information of the target oil layer in the control command is the 15 th layer. The water distributor 15 obtains the 15 th layer as a target oil layer.
Step S135: the water distributor 15 judges whether the position information of the target oil layer is consistent with the position of the oil layer where the target oil layer is located; when the level information of the target oil layer is consistent with the level of the oil layer where the target oil layer is located, the water distributor 15 injects water into the target oil layer. For example, when the oil layer where the water distributor 15 is located is the 15 th layer, since the layer level information of the target oil layer is the 15 th layer, the water distributor 15 opens its water nozzle to inject water into the 15 th layer.
Further, the step S135, the water distributor 15 determines whether the level information of the target oil layer is consistent with the level of the oil layer where the target oil layer is located, and further includes:
when the level information of the target oil layer is inconsistent with the level of the oil layer where the target oil layer is located, the water distributor 15 is closed to avoid water injection to the oil layer where the target oil layer is located. For example, when the oil layer where the water distributor 15 is located is the 14 th layer, the water distributor 15 closes its water nozzle to avoid water injection to the 14 th oil layer because the level information of the target oil layer is the 15 th layer.
The above are only a few embodiments of the present invention, and those skilled in the art can make various changes or modifications to the embodiments of the present invention according to the disclosure of the application document without departing from the spirit and scope of the present invention.
Claims (7)
1. A control method of a layered water injection system is characterized by comprising the following steps:
the controller controls the adjusting part to enable a first flow wave to be generated in the first flow channel, encodes the first flow wave and loads a control command on the first flow wave;
the water distributor receives the first flow wave, and judges whether to inject water according to the control instruction in the first flow wave, and the method specifically comprises the following steps:
the second flow meter receives the first flow wave and acquires the control command in the first flow wave; uploading the control instruction to the water distributor;
the water distributor acquires the position information of a target oil layer in the control instruction;
the water distributor judges whether the position information of the target oil layer is consistent with the position of the oil layer where the target oil layer is located;
when the position information of the target oil layer is consistent with the position of the oil layer where the target oil layer is located, the water distributor injects water into the target oil layer;
when the position information of the target oil layer is inconsistent with the position of the oil layer where the target oil layer is located, the water distributor is closed to avoid water injection on the oil layer where the target oil layer is located;
the stratified water injection system comprises:
the generator is internally provided with a first flow passage for fluid to pass through; the side wall of the first flow channel is provided with an adjusting part which is used for adjusting the flow of the fluid so as to generate a first flow wave and enable the first flow wave to be transmitted through the fluid;
the controller is connected with the adjusting part and is used for controlling the adjusting part so as to encode the first flow waves and load control instructions on the first flow waves;
a water distributor disposed within the wellbore; the water distributor is communicated with the first flow passage; the water distributor is used for receiving the first flow wave and judging whether water is injected or not according to the control instruction in the first flow wave.
2. The method of claim 1, wherein the generator is an electrically controlled valve or a variable frequency electrically controlled pump.
3. The method for controlling a stratified water injection system as claimed in claim 1, further comprising: the first flow passage is communicated with the water source so that the injected water can be injected into a target oil layer through the water distributor and can be used as a medium for transmitting the first flow wave.
4. The control method of the stratified water injection system as claimed in claim 1, wherein: a second flow passage for fluid to pass through is arranged in the water distributor; the side wall of the second flow channel is provided with a control part, and the control part is used for controlling the flow of the fluid to form a second flow wave and encoding the second flow wave, so that feedback information can be loaded on the second flow wave, and the second flow wave can be transmitted through the fluid.
5. The control method of the stratified water injection system as claimed in claim 4, wherein: and a first flow meter is arranged between the generator and the water distributor, the first flow meter is connected with the controller, and the first flow meter is used for receiving the second flow waves and uploading the feedback information in the second flow waves to the controller.
6. The control method of the stratified water injection system as claimed in claim 1, wherein: and a second flow meter is arranged on the water distributor and is used for receiving the first flow wave and uploading a control instruction in the first flow wave to the water distributor so that the water distributor can inject water according to the control instruction.
7. The control method of the stratified water injection system as claimed in claim 1, wherein: the well bore is multiple; the generators are multiple, and a plurality of wellbores correspond to the generators; the first flow passage of each generator is in communication with the water distributor in the corresponding wellbore.
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| CN102839954B (en) * | 2011-06-24 | 2015-10-07 | 中国石油化工股份有限公司 | A kind of pressure pulse realizes the method for layering water distribution |
| CN102839953B (en) * | 2011-06-24 | 2015-08-05 | 中国石油化工股份有限公司 | A kind of pressure test controls the method injecting flow |
| GB2499593B8 (en) * | 2012-02-21 | 2018-08-22 | Tendeka Bv | Wireless communication |
| US9617850B2 (en) * | 2013-08-07 | 2017-04-11 | Halliburton Energy Services, Inc. | High-speed, wireless data communication through a column of wellbore fluid |
| WO2016010960A1 (en) * | 2014-07-18 | 2016-01-21 | Schlumberger Canada Limited | Intelligent water flood regulation |
| CN105986791A (en) * | 2015-02-17 | 2016-10-05 | 赵华 | Intelligent eccentric remote water distributor, intelligent separated layer water injection tubular column, intelligent remote measuring and control device and intelligent remote measured and regulated separated layer water injection method |
| CN204476377U (en) * | 2015-03-13 | 2015-07-15 | 中国石油化工股份有限公司 | A kind of differential intelligent watering device |
| GB2570080B (en) * | 2016-12-28 | 2021-09-22 | Halliburton Energy Services Inc | Method and system for communication by controlling the flowrate of a fluid |
| CN207377547U (en) * | 2017-09-08 | 2018-05-18 | 西安思坦仪器股份有限公司 | A kind of device using flow waves regulation and control seperated layer water injection |
| CN108222902B (en) * | 2017-10-24 | 2020-10-16 | 中国石油化工股份有限公司 | Intelligent water injection device and method |
| CN108222903B (en) * | 2017-10-24 | 2020-12-22 | 中国石油化工股份有限公司 | Downhole flow metering device and method for separate-zone water injection well |
| CN108397173A (en) * | 2018-02-07 | 2018-08-14 | 中国石油天然气股份有限公司 | Stratified water injection system and method |
| CN109763799B (en) * | 2019-03-18 | 2020-11-10 | 中国石油化工股份有限公司 | Method for controlling separated layer water injection by using flow wave |
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