CN114622879B - Layered water injection wireless communication method and wireless two-way communication device - Google Patents
Layered water injection wireless communication method and wireless two-way communication device Download PDFInfo
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- CN114622879B CN114622879B CN202011432668.5A CN202011432668A CN114622879B CN 114622879 B CN114622879 B CN 114622879B CN 202011432668 A CN202011432668 A CN 202011432668A CN 114622879 B CN114622879 B CN 114622879B
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- 230000006854 communication Effects 0.000 title claims abstract description 175
- 238000004891 communication Methods 0.000 title claims abstract description 175
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 131
- 238000002347 injection Methods 0.000 title claims abstract description 39
- 239000007924 injection Substances 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 26
- 239000007788 liquid Substances 0.000 claims description 32
- 230000008054 signal transmission Effects 0.000 claims description 22
- 230000007175 bidirectional communication Effects 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 8
- 238000011217 control strategy Methods 0.000 claims description 6
- 239000012530 fluid Substances 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims 1
- 239000010410 layer Substances 0.000 description 57
- 230000005540 biological transmission Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 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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- 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
- E21B43/14—Obtaining from a multiple-zone well
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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
- E21B47/00—Survey of boreholes or wells
- E21B47/12—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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Abstract
The invention provides a layered water injection wireless communication method and a wireless two-way communication device, which adopt annular pressure wave communication, have high pressure wave establishment speed and communication efficiency, are irrelevant to stratum, are irrelevant to the communication, and have high reliability, thereby providing a new technical means for the study of the layered water injection wireless communication method. New technological base.
Description
Technical Field
The invention relates to the field of separate-layer water injection in oil fields, in particular to a separate-layer water injection wireless communication method and a wireless two-way communication device.
Background
Water flooding is a main development technology of domestic oil fields, and 80% of domestic yield comes from water flooding development. The domestic oil fields generally have the characteristics of multiple layers and heterogeneity, the general split injection can lead to single-layer burst, and the split injection is widely adopted. In order to further improve the layered water injection effect, the intelligent layered water injection technology is developed in China, and the core characteristics are that: continuous monitoring of underground layering parameters and automatic control of layering flow can be achieved.
At present, intelligent separated layer water injection mainly has two technical routes: one is a wired technology route, namely: the underground parameters are transmitted to the ground through a cable mode by a preset cable outside the oil pipe, and one is a wireless technical route, namely: downhole parameters are transmitted wirelessly to the surface. Compared with a wired mode, a wireless mode has the technical advantages of simple construction, low cost and the like, and related patents show that: at present, the wireless communication mode is mainly transmitted to a wellhead through oil pipe pressure waves of a water injection well, and field application is already carried out, but the oil pipe pressure wave communication is seriously affected by stratum, the transmission speed is low, and the reliability is difficult to guarantee.
Therefore, a measurement method is needed to solve the above problems.
Disclosure of Invention
In order to solve at least one of the above problems, in one aspect, the present invention provides a wireless communication method for separate-layer water injection, which uses annular liquid as a communication medium under the condition that an annulus is full of liquid, then generates corresponding annular pressure wave signals by controlling the liquid to enter and exit from a wellhead communication controller, converts the annular pressure wave signals into electrical signals by using a downhole communication controller, and sends the electrical signals to each layer of water distributors through an electrical signal transmission medium, so that the wellhead communication controller communicates with each water distributor in a first direction; and/or
The electric signals sent by each layer of water distributors are transmitted to the underground communication controller through the electric signal transmission medium, and the electric signals are converted into annular pressure wave signals through the underground communication controller and transmitted to the wellhead communication controller, so that the wellhead communication controller and each water distributor are communicated in the second direction.
In certain embodiments, determining the annulus pressure wave signal from the liquid comprises:
the underground communication controller and the wellhead communication controller regulate the flow area of the liquid through a continuously adjustable water nozzle so as to generate pressure fluctuation; and obtaining a corresponding annular pressure wave signal according to the fluctuation.
In certain embodiments, the annulus pressure wave signal is a first pressure wave signal; converting the annulus pressure wave signal into an electrical signal using the downhole communication controller, comprising:
converting the first pressure wave signal to a first voltage using a downhole communication controller;
The annulus pressure wave signal is a second pressure wave signal; converting the annulus pressure wave signal into an electrical signal using the downhole communication controller, comprising:
The second pressure wave signal is converted to a second voltage using a downhole communication controller.
In certain embodiments, pressure wave signals generated by the wellhead communication controller pressurization process and depressurization process are filtered by the downhole communication controller.
In some embodiments, control command codes of all water distributors are set according to a preset water distributor control strategy and in combination with the current water distribution condition; and generating and controlling the wellhead communication controller to generate corresponding annular pressure wave signals according to the control command codes.
In some embodiments, the control instruction encoding comprises: the frame head, the water distributor address and the pressure instruction after uploading the mouth and the tail end bit correspond to coding bits.
The embodiment of the second aspect of the invention provides a layered water injection wireless two-way communication device, which comprises an underground oil pipe, wherein liquid is injected into an annular space outside the underground oil pipe;
the wellhead communication controller is used for generating corresponding annular pressure wave signals by controlling the liquid to enter and exit;
the underground communication controller is used for converting the annular pressure wave signal into an electric signal; so that the wellhead communication controller and each water distributor are communicated in a first direction;
The electric signal transmission medium is used for transmitting electric signals sent by each layer of water distributors to the underground communication controller;
The underground communication controller further converts the electric signals into annular pressure wave signals and transmits the annular pressure wave signals to the wellhead communication controller, so that the wellhead communication controller and each water distributor are communicated in the second direction.
In certain embodiments, the system further comprises an adjustable water nozzle, and the downhole communication controller and the wellhead communication controller are both electronic control systems having continuously adjustable water nozzles.
In some embodiments, the wellhead communication controller is a three-position three-way valve.
In certain embodiments, the annulus pressure wave signal is generated by the wellhead communication controller in accordance with a control command code;
The control instruction code is generated by combining the current water distribution condition according to a preset water distributor control strategy;
The control instruction code includes: the frame head, the water distributor address and the pressure instruction after uploading the mouth and the tail end bit correspond to coding bits.
The invention has the beneficial effects that:
The invention provides a wireless communication method for separate-layer water injection, which is characterized in that under the condition that an annulus is full of liquid, annular liquid is used as a communication medium, then a corresponding annular pressure wave signal is generated by controlling the liquid to enter and exit a wellhead communication controller, the annular pressure wave signal is converted into an electric signal by a downhole communication controller and is sent to each layer of water distributors through an electric signal transmission medium, and then the wellhead communication controller and each water distributor are communicated in a first direction; and/or the electric signal transmitted by each layer of water distributors is transmitted to an underground communication controller through the electric signal transmission medium, and the electric signal is converted into an annular pressure wave signal through the underground communication controller and transmitted to a wellhead communication controller, so that the wellhead communication controller and each water distributor are communicated in the second direction.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 shows a schematic diagram of a layered water injection wireless two-way communication device according to an embodiment of the present invention.
Fig. 2 shows a second schematic diagram of a layered water injection wireless two-way communication device according to an embodiment of the invention.
Reference numerals of fig. 2, 1, oil pipe; 2. a sleeve; 3. an electrical signal transmission medium; 4. a wellhead communication controller; 5. a downhole communication controller; 6. a layer 1 packer; 7. layer 1 water distributors; 8. a layer 2 packer; 9. layer 2 water distributors; 10. an nth layer packer; 11. an nth layer water distributor; 12. and (5) plugging.
Fig. 3 shows one example of a ground signal carrier-to-pressure wave encoding scheme in accordance with an embodiment of the present invention.
Fig. 4 shows one of the specific decoded command patterns of an annular pressure wave in an embodiment of the invention.
Fig. 5 shows a second exemplary embodiment of a ground signal carrier-to-pressure wave encoding scheme in accordance with the present invention.
FIG. 6 shows a second exemplary embodiment of a decoded instruction of an annular pressure wave.
Fig. 7 shows a schematic diagram of connection between a wellhead communication controller and a water injection flow line in an embodiment of the present invention.
Fig. 8 shows a schematic diagram of a wellhead communication controller of a three-position three-way valve in an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
At present, intelligent separated layer water injection mainly has two technical routes: one is a wired technology route, namely: the underground parameters are transmitted to the ground through a cable mode by a preset cable outside the oil pipe, and one is a wireless technical route, namely: downhole parameters are transmitted wirelessly to the surface. Compared with a wired mode, a wireless mode has the technical advantages of simple construction, low cost and the like, and related patents show that: at present, the wireless communication mode is mainly transmitted to a wellhead through an oil pipe pressure wave of a water injection well, and field application is already carried out, but the following defects exist in the prior art:
1. The transmission is affected by the stratum, the reliability is poor, and the uploading of a group of data is generally more than 1 hour;
2. The pressure wave transmission of the oil pipe is influenced by the stratum characteristic, and has large correlation with the water absorption characteristic of the stratum and lower reliability.
As shown in fig. 1, assuming that a water injection well has two layers, when data of a first layer needs to be transmitted, the opening change of a first layer valve causes the pressure change of an oil pipe, a pressure wave is generated, and data parameters needing to be uploaded are loaded on the pressure wave. At this time: if the second layer is a low-permeability oil reservoir and the water absorption is poor, the pressure wave at the wellhead generally changes greatly, the wellhead is easy to identify, and wireless uploading is easy to realize through the pressure wave; if the second layer is a high permeable layer, the water absorption is better, the phenomenon that the pressure wave of the wellhead is less in change and not easy to identify possibly occurs, and the first layer fails to upload data through the pressure wave.
Based on the above, the invention provides a layered water injection wireless communication method, which comprises the following steps:
s1: using the annular liquid as a communication medium under the condition that the annular space is full of the liquid;
s2: generating corresponding annulus pressure wave signals by controlling the fluid to enter and exit the wellhead communication controller;
s3: the annulus pressure wave signal is converted into an electric signal by using an underground communication controller and is sent to each layer of water distributors through an electric signal transmission medium, so that the wellhead communication controller and each water distributor are communicated in a first direction; and/or
S4: the electric signals sent by each layer of water distributors are transmitted to the underground communication controller through the electric signal transmission medium, and the electric signals are converted into annular pressure wave signals through the underground communication controller and transmitted to the wellhead communication controller, so that the wellhead communication controller and each water distributor are communicated in the second direction.
The method comprises the steps of using annular liquid as a communication medium under the condition that an annulus is full of liquid, then generating corresponding annular pressure wave signals by controlling the liquid to enter and exit a wellhead communication controller, converting the annular pressure wave signals into electric signals by using a downhole communication controller, and sending the electric signals to each layer of water distributors through an electric signal transmission medium, so that the wellhead communication controller and each water distributor are communicated in a first direction; and/or the electric signal transmitted by each layer of water distributors is transmitted to an underground communication controller through the electric signal transmission medium, and the electric signal is converted into an annular pressure wave signal through the underground communication controller and transmitted to a wellhead communication controller, so that the wellhead communication controller and each water distributor are communicated in the second direction.
It is clear to those skilled in the art that the separate layer water injection means to put in the packer in the water injection well, separate the oil layer with larger difference, then use the water distributor to distribute water in separate layer, make the water injection rate of the high-permeability layer controlled, the water injection rate of the oil layer with medium-low permeability is strengthened, make various oil layers all play a role, the water distributor and the packer in the invention can be one-layer to multi-layer respectively, and the invention is not limited in this.
It will be appreciated that the wireless communication method in the present invention may be unidirectional or bidirectional, i.e. may be up-down communication and down-up communication, or may be performed simultaneously, which is not limited by the present invention. When the underground water distribution device is communicated from top to bottom, ground instructions are transmitted to an underground communication controller through annular pressure waves, the underground communication controller transmits the instructions to all layers of water distributors through electric signal transmission media, and all layers of water distributors distribute water according to the instruction requirements; when the underground water distributors communicate from bottom to top, monitored data are firstly transmitted to the underground communication controller through the electric signal transmission medium, and the underground communication controller is transmitted to the wellhead communication controller through annulus pressure wave communication, so that wireless bidirectional communication of separate-layer water injection can be realized at the same time.
Preferably, the electric signal transmission medium is a cable, and is used for connecting all layers of water distributors and communicating with the underground communication controller.
In some embodiments, determining the annulus pressure wave signal from the liquid comprises: the underground communication controller and the wellhead communication controller regulate the flow area of the liquid through the continuously adjustable water nozzle so as to generate pressure fluctuation, and corresponding annular pressure wave signals are obtained according to the fluctuation.
The technical core of the adjustable water nozzle is that the flow area of the water nozzle is adjustable, and the valve core and the valve sleeve of the water nozzle are provided with various shapes of throttling grooves which have the characteristics of large hydraulic radius, easy adjustment of the gradient of the flow area, strong anti-blocking performance, large flow control range and the like.
In some embodiments, pressure wave signals generated by the wellhead communication controller pressurization process and depressurization process are filtered by the downhole communication controller.
In some embodiments, the annulus pressure wave signal is a first pressure wave signal; converting the annulus pressure wave signal into an electrical signal using the downhole communication controller, comprising: converting the first pressure wave signal to a first voltage using a downhole communication controller; the annulus pressure wave signal is a second pressure wave signal; converting the annulus pressure wave signal into an electrical signal using the downhole communication controller, comprising: the second pressure wave signal is converted to a second voltage using a downhole communication controller.
Further, according to a preset water distributor control strategy, setting control instruction codes of all water distributors in combination with the current water distribution condition; and generating and controlling the wellhead communication controller to generate corresponding annular pressure wave signals according to the control command codes.
As shown in fig. 3, when signals are transmitted from top to bottom: the wellhead controller is opened, the annular pressure is increased to a certain value (for example, 0.5MPa is increased, the value can be identified, the smaller the value is, the better the value is), the pressure is stabilized for a period of time, and the wellhead controller is depressurized to a water tank to form a position. And by analogy, a preset pressure code can be generated, and a ground signal carrier wave is coded to a pressure wave, so that data is transmitted from top to bottom. Taking two bits as an example: each position is subjected to the processes of ground pressurization, stabilization, pressure relief and stabilization. (note: each value in the figure needs not be absolutely unchanged and needs to be adjusted according to the situation in the field). Each bit is in a similar manner.
In one embodiment, the data communication format from top to bottom is defined as: 4-bit frame header + 4-bit layer segment information + 7-bit control information + 3-bit end bit, wherein the 4-bit frame header represents the beginning segment and the beginning of the data string; 4-bit layer segment information represents uploading any layer of data, and 16 layers can be controlled; the 7-bit control information indicates how to inform the downhole water distributor to act; 3-bit end bit.
It will be appreciated that the frame header and end bits contain some necessary control information such as synchronization information, address information, error control information, etc.; the data portion includes data such as flow, pressure, temperature, etc., which is not limited by the present invention.
Transmitting an instruction from the ground, wherein the instruction comprises the following contents: the pressure command after uploading the mouth is notified to the second layer underground, the command is sent through annular pressure wave, the command firstly reaches the underground communication controller, the underground controller transmits the command to the designated water distributor again through a cable, and the specific decoded command of the annular pressure wave is shown in fig. 4.
As shown in fig. 5, when data is transmitted from bottom to top, if layer 2 receives an upload command sent from the ground, it is firstly transmitted to an underground communication controller through a cable, the underground communication controller is matched with a wellhead communication controller, an annulus pressure wave is generated, and the underground data is transmitted to a wellhead, and the specific process is as follows:
the underground controller is opened, the annulus is filled with liquid, the controller is closed (PID automatic control) after the annulus pressure is increased to a set value, and the wellhead controller is used for carrying out ground pressure relief and stabilizing for 3 seconds after monitoring that the annulus pressure is stable, so that one position is formed. And so on, forming the second bit.
In some embodiments, as shown in fig. 6, the coding mode and the communication rate are the same as those from top to bottom, and the data communication format from bottom to top can be defined as: each layer downhole requires 5 parameters to be uploaded: flow, pre-mouth pressure, post-mouth pressure, temperature and valve opening, command format: 4-bit frame header+4-bit layer section information+10-bit data+3-bit end bit. The 4-bit frame header represents the beginning segment and the beginning of the data string; the 4-bit interval information represents interval information, so that any underground layer can be controlled in a layering manner, and 16 layers can be controlled; 10-bit data information shows that the flow is 1023m 3/d at maximum, the pressure is 102.3MPa at maximum, the temperature is 204.6 ℃ at maximum, and the maximum opening is 1/1023;3 bits end bit, second layer upload post-tip pressure data (30.5 MPa) (21 bits total).
It can be appreciated that this scenario has the following advantages:
1. the communication speed is further improved, the transmission distance of the annular pressure wave communication is long, and the speed is high;
2. The communication is irrelevant to stratum, the reliability is higher, and the high-efficiency and long-distance communication can be ensured;
3. The communication depth is deeper;
4. the distance between the water distributors is generally relatively short, and the electric signal transmission medium is less.
Based on the same inventive concept, another embodiment of the present application provides a layered water injection wireless bidirectional communication device, including: the underground oil pipe is filled with liquid in an annular space outside the underground oil pipe; the wellhead communication controller is used for generating corresponding annular pressure wave signals by controlling the liquid to enter and exit; the underground communication controller is used for converting the annular pressure wave signal into an electric signal; so that the wellhead communication controller and each water distributor are communicated in a first direction; the electric signal transmission medium is used for transmitting electric signals sent by each layer of water distributors to the underground communication controller; the underground communication controller further converts the electric signals into annular pressure wave signals and transmits the annular pressure wave signals to the wellhead communication controller, so that the wellhead communication controller and each water distributor are communicated in the second direction.
The wireless bi-directional communication device with separate water injection according to the above embodiment is described in detail below with reference to fig. 2.
In some embodiments, as shown in fig. 2, the tubing string is composed of a water distributor, a packer, a downhole communication controller and a wellhead communication controller, and is suitable for multi-layer injection, where n is illustrated as an example of an injected water layer. Each water distributor is powered by a battery and has the functions of pressure, flow monitoring, flow control and the like. All water distributors are connected by means of an electrical signal transmission medium and then connected to a downhole communication controller.
When the underground water distributor is communicated from top to bottom, ground instructions are transmitted to the underground communication controller through annular pressure waves, the underground communication controller transmits the instructions to all layers of water distributors through electric signal transmission media, and all layers of water distributors distribute water according to instruction requirements.
When the underground water distributors communicate from bottom to top, monitored data are firstly transmitted to the underground communication controller through an electric signal transmission medium, and the underground communication controller is transmitted to the wellhead communication controller through annulus pressure wave communication, so that layered water injection wireless two-way communication is realized.
In some embodiments, the downhole communication controller and the uphole communication controller are each an electronic control system having a continuously adjustable water nozzle. As shown in fig. 7, the wellhead communication controller is connected with the water injection flow pipeline and has the function of continuously controlling the control valve, and the control valve is opened when the wellhead needs to be pressurized to the annulus, including the control valve, the water tank, the booster pump and the pressure reducing valve, and the annulus pressure is increased. When the annular pressure is required to be released, the electric control valve is closed, the pressure is released, and the liquid flows to the water tank. At the same time, the discharge liquid may be pressurized to the injection end.
In some embodiments, as shown in fig. 8, the wellhead communication controller is a three-position three-way valve, and annular pressurization and depressurization can be achieved electrically. Comprising three states 1: all the channels are not communicated and water is normally injected; state 2: the water injection pipeline is used for injecting liquid into the annular space; state 3: the annulus drains to the tank.
In some embodiments, the annulus pressure wave signal is generated by the wellhead communication controller in accordance with a control command code; the control instruction code is generated by combining the current water distribution condition according to a preset water distributor control strategy; the control instruction code includes: the frame head, the water distributor address and the pressure instruction after uploading the mouth and the tail end bit correspond to coding bits.
As can be seen from the above embodiments, the present invention provides a layered water injection wireless bidirectional communication device, comprising:
The underground oil pipe is filled with liquid in an annular space outside the underground oil pipe; the wellhead communication controller is used for generating corresponding annular pressure wave signals by controlling the liquid to enter and exit; the underground communication controller is used for converting the annular pressure wave signal into an electric signal; so that the wellhead communication controller and each water distributor are communicated in a first direction; the electric signal transmission medium is used for transmitting electric signals sent by each layer of water distributors to the underground communication controller; the underground communication controller further converts the electric signals into annular pressure wave signals and transmits the annular pressure wave signals to the wellhead communication controller, so that the wellhead communication controller and each water distributor are communicated in the second direction.
In this specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments. In particular, for system embodiments, since they are substantially similar to method embodiments, the description is relatively simple, as relevant to see a section of the description of method embodiments.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the embodiments of the present specification. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example.
Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction. The foregoing is merely an example of an embodiment of the present disclosure and is not intended to limit the embodiment of the present disclosure. Various modifications and variations of the illustrative embodiments will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, or the like, which is within the spirit and principles of the embodiments of the present specification, should be included in the scope of the claims of the embodiments of the present specification.
Claims (10)
1. A method of wireless communication with separate-layer water injection, comprising:
Using the annular liquid as a communication medium under the condition that the annular space is full of the liquid;
Under the condition that the annulus is full of liquid, using the annulus liquid as a communication medium for communication;
generating corresponding annulus pressure wave signals by controlling the fluid to enter and exit the wellhead communication controller;
The annulus pressure wave signal is converted into an electric signal by using an underground communication controller and is sent to each layer of water distributors through an electric signal transmission medium, so that the wellhead communication controller and each water distributor are communicated in a first direction; and/or
The electric signals sent by each layer of water distributors are transmitted to the underground communication controller through the electric signal transmission medium, and the electric signals are converted into annular pressure wave signals through the underground communication controller and transmitted to the wellhead communication controller, so that the wellhead communication controller and each water distributor are communicated in the second direction.
2. The method of claim 1, wherein determining the annulus pressure wave signal from the fluid comprises:
the underground communication controller and the wellhead communication controller regulate the flow area of the liquid through a continuously adjustable water nozzle so as to generate pressure fluctuation;
And obtaining a corresponding annular pressure wave signal according to the fluctuation.
3. The method of claim 1, wherein the wireless communication device comprises a wireless communication device,
The annulus pressure wave signal is a first pressure wave signal; converting the annulus pressure wave signal into an electrical signal using the downhole communication controller, comprising:
converting the first pressure wave signal to a first voltage using a downhole communication controller;
The annulus pressure wave signal is a second pressure wave signal; converting the annulus pressure wave signal into an electrical signal using the downhole communication controller, comprising:
The second pressure wave signal is converted to a second voltage using a downhole communication controller.
4. The method of wireless communication with stratified water injection as claimed in claim 1, further comprising:
and filtering pressure wave signals generated in the pressurizing process and the pressure releasing process of the wellhead communication controller through the underground communication controller.
5. The method of wireless communication with stratified water injection as claimed in claim 1, further comprising:
Setting control instruction codes of all water distributors according to a preset water distributor control strategy and combining the current water distribution condition;
and controlling the wellhead communication controller to generate corresponding annular pressure wave signals according to the control instruction codes.
6. The method of claim 5, wherein the wireless communication device comprises a wireless communication device,
The control instruction code includes: the frame head, the water distributor address and the pressure instruction after uploading the mouth and the tail end bit correspond to coding bits.
7. A layered water injection wireless two-way communication device, comprising:
the underground oil pipe is filled with liquid in an annular space outside the underground oil pipe;
the wellhead communication controller is used for generating corresponding annular pressure wave signals by controlling the liquid to enter and exit;
the underground communication controller is used for converting the annular pressure wave signal into an electric signal; so that the wellhead communication controller and each water distributor are communicated in a first direction;
The electric signal transmission medium is used for transmitting electric signals sent by each layer of water distributors to the underground communication controller;
The underground communication controller further converts the electric signals sent by the water distributors of all layers into annular pressure wave signals and transmits the annular pressure wave signals to the wellhead communication controller, so that the wellhead communication controller and the water distributors are communicated in the second direction.
8. The wireless bi-directional communication device of claim 7, further comprising:
The underground communication controller and the wellhead communication controller are both electric control systems with continuously adjustable water nozzles.
9. The wireless bi-directional communication device of claim 7, wherein said wellhead communication controller is a three-position three-way valve.
10. The wireless bi-directional communication device of claim 7, wherein the wireless bi-directional communication device is configured to communicate with the wireless bi-directional communication device,
The annular pressure wave signal is generated by the wellhead communication controller according to control instruction codes;
The control instruction code is generated by combining the current water distribution condition according to a preset water distributor control strategy;
The control instruction code includes: the frame head, the water distributor address and the pressure instruction after uploading the mouth and the tail end bit correspond to coding bits.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011432668.5A CN114622879B (en) | 2020-12-10 | 2020-12-10 | Layered water injection wireless communication method and wireless two-way communication device |
Applications Claiming Priority (1)
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