method and system for intelligent testing and adjusting underground wireless layered water distribution
阅读说明：本技术 一种用于智能测调井下无线分层配水的方法及系统 (method and system for intelligent testing and adjusting underground wireless layered water distribution ) 是由 何祖清 何同 彭汉修 于 2018-07-18 设计创作，主要内容包括：本发明公开了一种用于智能测调井下无线分层配水的方法及系统,包括：获取一个或多个需要调节的井下智能配水器的配水指令,并将其转换成相应的水嘴声波动作信号,通过配水管柱向井下发送；指定的井下智能配水器接收相应的水嘴声波动作信号,调节其内部的水嘴至与水嘴声波动作信号匹配的开度,完成分层配水；井下智能配水器定时采集对应地层的反馈信息,生成与反馈信息匹配的声波振动信号,并通过配水管柱将分时向地面发送；井口控制器接收上述声波振动信号,并将其转换成反馈信息,用以监测设备及地层配水状态。本发明实现了数据和指令的无线双向通讯和智能化配水调控,完成油田井精细分层注水,明显简化工艺,提高配注合格率。(The invention discloses a method and a system for intelligently measuring and adjusting underground wireless layered water distribution, which comprises the steps of obtaining water distribution instructions of one or more underground intelligent water distributors needing to be adjusted, converting the water distribution instructions into corresponding water nozzle sound wave action signals, sending the signals to the underground through a water distribution pipe column, receiving the corresponding water nozzle sound wave action signals by a designated underground intelligent water distributor, adjusting the water nozzles in the underground intelligent water distributor to the opening degree matched with the water nozzle sound wave action signals, completing layered water distribution, regularly acquiring feedback information of a corresponding stratum by the underground intelligent water distributor, generating sound wave vibration signals matched with the feedback information, sending the sound wave vibration signals to the ground in a time sharing mode through the water distribution pipe column, receiving the sound wave vibration signals by a wellhead controller, converting the sound wave vibration signals into the feedback information for monitoring equipment and stratum water distribution states.)
1, method for intelligent logging and adjusting downhole wireless layered water distribution, comprising:
water distribution instructions of one or more designated underground intelligent water distributors needing to be adjusted are obtained and converted into corresponding water nozzle sound wave action signals, and the signals are further transmitted to the underground through a water distribution pipe column, wherein each water distribution instruction comprises corresponding water nozzle opening information and opening continuous control information of the underground intelligent water distributors;
the appointed underground intelligent water distributor receives the corresponding water nozzle sound wave action signal, adjusts the water nozzle in the underground intelligent water distributor to the opening degree matched with the water nozzle sound wave action signal, and starts layered water distribution;
each underground intelligent water distributor regularly collects feedback information including water outlet flow, fluid pressure value and fluid temperature value of a corresponding stratum, generates a sound wave vibration signal matched with the feedback information, and sends the sound wave vibration signal to the ground in a time-sharing manner through the water distribution pipe column;
and the wellhead controller receives the sound wave vibration signals sent by each underground intelligent water distributor, restores the sound wave vibration signals into the feedback information of the corresponding stratum, and is used for monitoring the working state and the stratum water distribution state of the underground intelligent water distributor.
2. The method of claim 1, further comprising:
and acquiring and analyzing the feedback information, and generating water distribution instructions of the underground intelligent water distributors needing to be adjusted according to the analysis result.
3. The method of claim 2, wherein in the step of obtaining and analyzing the feedback information to generate water distribution instructions for one or more downhole intelligent water distributors needing to be adjusted according to the analysis result, the step of further comprises:
receiving all the feedback information;
determining or a plurality of appointed underground intelligent water distributors needing to be regulated according to the feedback information and the corresponding stratum water quantity demand condition by using a water distribution regulation model;
and converting the water distribution amount corresponding to the appointed underground intelligent water distributor into a water distribution instruction, and sending the water distribution instruction to the wellhead controller.
4. The method according to any of claims 1-3, further comprising amplifying the water nozzle sound wave action signal or the sound wave vibration signal transmitted to the current sound wave repeater by sound wave repeaters installed on the outer wall of the water distribution pipe column at preset repeater distribution intervals so as to maintain the amplitude of the amplified signal.
5. The method of any of claims 1-4, wherein in the step of time sharing transmitting the sonic vibration signal to the surface through the distribution string,
and the underground intelligent water distributor returns the sound wave vibration signal to the wellhead controller according to a preset corresponding feedback control time interval, wherein the feedback control time interval is determined by combining the bottom hole depth of the underground intelligent water distributor and the signal transmission rate based on the preset timing acquisition time in the real-time clock.
6, A system for intelligent logging and regulating wireless layered water distribution downhole, comprising:
the underground intelligent water distributors are arranged in the water distribution pipe columns and arranged between adjacent layered packers, and are configured to receive corresponding water nozzle sound wave action signals, adjust water nozzles inside the underground intelligent water distributors to the opening degree matched with the water nozzle sound wave action signals, start layered water distribution, regularly acquire feedback information including water outlet flow, fluid pressure values and fluid temperature values of corresponding stratums by each underground intelligent water distributor, generate sound wave vibration signals matched with the feedback information, and send the sound wave vibration signals to the ground in a time-sharing manner through the water distribution pipe columns;
the wellhead controller is arranged on the ground close to a wellhead and is configured to acquire water distribution instructions of one or more specified underground intelligent water distributors needing to be adjusted, convert the water distribution instructions into corresponding water nozzle sound wave action signals, and transmit the water nozzle sound wave action signals to the underground through a water distribution pipe column in step , wherein each water distribution instruction comprises corresponding water nozzle opening information and opening continuous control information of the underground intelligent water distributors, and receives the sound wave vibration signals sent by each underground intelligent water distributor and restores the sound wave vibration signals into corresponding stratum feedback information to monitor the working state of the underground intelligent water distributors and the stratum water distribution state.
7. The system of claim 6, further comprising a remote server connected to the wellhead controller, the remote server configured to obtain and analyze the feedback information and generate water distribution instructions for one or more downhole intelligent water distributors to be adjusted based on the analysis.
8. The system according to claim 6 or 7, characterized in that it further comprises: the sound wave repeaters are arranged on the outer wall of the water distribution pipe column at preset repeater distribution intervals, and the sound wave repeaters are used for amplifying the sound wave action signals or the sound wave vibration signals of the water nozzle transmitted to the current sound wave repeaters so as to keep the amplitude of the amplified signals.
9. The system of any of claims 6-8, wherein the downhole intelligent water distributor further comprises:
the sound wave receiving module is used for converting the received sound wave action signal of the water nozzle into an electric signal;
a motor;
the water nozzle is connected with the motor;
the pressure gauge is arranged at a water outlet close to the water nozzle and is used for collecting fluid pressure signals in the layered water distribution process at regular time;
the flowmeter is arranged at a water outlet close to the water nozzle and is used for collecting water outlet flow signals in the layered water distribution process at regular time;
the thermometer is arranged at a water outlet close to the water nozzle and is used for collecting fluid temperature signals in the layered water distribution process at regular time;
the processor is connected with the sound wave receiving module, the motor, the pressure gauge, the flowmeter and the thermometer, and is configured to drive the motor to rotate by using the converted sound wave action signals of the water nozzle so as to control the opening degree of the water nozzle, acquire the fluid pressure signals, the effluent flow signals and the fluid temperature signals in the layered water distribution process, respectively preprocess the signals, convert the signals into corresponding feedback information comprising the effluent flow, the fluid pressure values and the fluid temperature values, and output the feedback information according to preset corresponding feedback control time intervals; and
and a sound wave conversion module connected to the processor, configured to acquire the feedback information transmitted from the processor, and to transmit a sound wave vibration signal matching the feedback information.
10. The system of claim 7, wherein the wellhead controller comprises:
the wellhead signal sending module is provided with a signal transmitting end arranged below the liquid level in the water distribution pipe column, and is used for transmitting corresponding water nozzle sound wave action signals to the underground through the signal transmitting end after or more water distribution instructions sent by the remote server are subjected to digital-to-analog conversion and electric signal sound conversion signal processing;
and the wellhead signal receiving module is provided with a signal receiving end arranged at a ground wellhead, is used for receiving the sound wave vibration signal sent underground through the signal receiving end, and is used for obtaining the feedback information and transmitting the feedback information to the remote server after the sound signal is converted into an electric signal, amplified, filtered and subjected to analog-to-digital conversion in the step .
Technical Field
The invention relates to the technical field of oilfield development, in particular to underground wireless layered water distribution method and system with bidirectional signal transmission function for intelligent testing and adjustment.
Background
At present, the domestic stratified water injection technology can meet the requirements of most oil reservoir types, but the problems of poor oil-water well correspondence rate and poor water drive effect still exist. The existing water injection process mainly comprises the following steps according to a formula: the process comprises a concentric water distribution process, an eccentric water distribution process, cable-free measurement and adjustment water and the like, wherein the concentric water distribution process, the eccentric water distribution process and the like belong to the cable measurement and adjustment process, the process cannot meet the requirement of water injection of a highly deviated well and a horizontal well at a layered section due to the limitation of the number of the sections, and the problems of high construction cost, complex process and untimely allocation exist.
The existing wireless measurement and distribution water technology can realize remote control, greatly improves the aspects of advancement, convenience, well body adaptability and the like, but also has the problem of untimely feedback of underground measurement and distribution actions, and cannot monitor and regulate underground data in time. When the characteristic parameters such as formation pressure, temperature and permeability change, the injection amount cannot be sensed, identified, decided and adjusted in real time. The working condition of the underground pipe column cannot be controlled in time, so that the phenomena of low injection matching qualified rate, ineffective injection and the like are caused.
Disclosure of Invention
In order to solve the technical problem, the invention provides methods for intelligently measuring and adjusting underground wireless layered water distribution, which comprise the steps of obtaining water distribution instructions of one or more designated underground intelligent water distributors needing to be adjusted, converting the water distribution instructions into corresponding water nozzle sound wave action signals, further , transmitting the water nozzle sound wave action signals to the underground through a water distribution pipe column, wherein each water distribution instruction comprises corresponding water nozzle opening information and opening continuous control information of the underground intelligent water distributors, receiving the corresponding water nozzle sound wave action signals by the designated underground intelligent water distributors, adjusting water nozzles in the underground intelligent water distributors to opening degrees matched with the water nozzle sound wave action signals, starting layered water distribution, collecting feedback information including water outlet flow, fluid pressure values and fluid temperature values of corresponding stratums at regular time by the underground intelligent water distributors, generating sound wave vibration signals matched with the feedback information, sending the sound wave vibration signals to the ground in a time sharing mode through the water distribution pipe column, and receiving the vibration signals sent by the underground intelligent water distributors by the well head controllers, restoring the vibration signals into the feedback information of the corresponding stratums, and monitoring the working state of the underground intelligent water distributors and the sound wave water distribution.
Preferably, the method further comprises the steps of acquiring and analyzing the feedback information, and generating water distribution instructions of one or more downhole intelligent water distributors needing to be adjusted according to the analysis result.
Preferably, in the step of obtaining and analyzing the feedback information and generating water distribution instructions of one or more downhole intelligent water distributors needing to be adjusted according to the analysis result, step includes receiving all the feedback information, determining or more designated downhole intelligent water distributors needing to be adjusted according to the feedback information and corresponding stratum water quantity demand conditions by using a water distribution adjustment model, converting the water distribution amount corresponding to the designated downhole intelligent water distributors into water distribution instructions, and sending the water distribution instructions to the wellhead controller.
Preferably, the method further comprises: the sound wave repeaters are arranged on the outer wall of the water distribution pipe column at preset repeater distribution intervals, and the sound wave action signals or the sound wave vibration signals of the water nozzle transmitted to the current sound wave repeater are amplified so as to keep the amplitude of the amplified signals.
Preferably, in the step of sending the sound wave vibration signal to the ground in a time-sharing manner through the water distribution pipe column, the underground intelligent water distributor returns the sound wave vibration signal to the wellhead controller according to a preset corresponding feedback control time interval, wherein the feedback control time interval is determined by combining the bottom hole depth of the underground intelligent water distributor and the signal transmission rate based on a preset timing acquisition time in a real-time clock.
, the invention also provides underground wireless layered water distribution system for intelligent measurement and adjustment, which comprises a plurality of underground intelligent water distributors, a well mouth controller and a well mouth controller, wherein the plurality of underground intelligent water distributors are arranged in a water distribution pipe column and arranged between adjacent layered packers, are configured to receive corresponding sound wave action signals of water nozzles, adjust the water nozzles in the underground intelligent water distributors to the opening degree matched with the sound wave action signals of the water nozzles, start layered water distribution, acquire feedback information including water outlet flow, fluid pressure values and fluid temperature values of corresponding stratums at regular time, generate sound wave vibration signals matched with the feedback information, and transmit the sound wave vibration signals to the ground through the water distribution pipe column in a time-sharing manner, the well mouth controller is arranged close to the well mouth on the ground and is configured to acquire water distribution instructions of or a plurality of appointed underground intelligent water distributors needing to be adjusted, convert the water distribution instructions into corresponding sound wave action signals, the sends the corresponding sound wave vibration signals to the underground through the water distribution pipe column, and returns the water distribution state of the corresponding underground intelligent water distributors to monitor the working state of the underground intelligent water distributors.
Preferably, the system further comprises a remote server connected with the wellhead controller, wherein the remote server is configured to acquire and analyze the feedback information and generate water distribution instructions of one or more underground intelligent water distributors needing to be adjusted according to the analysis result.
Preferably, the system further comprises: the sound wave repeaters are arranged on the outer wall of the water distribution pipe column at preset repeater distribution intervals, and the sound wave repeaters are used for amplifying the sound wave action signals or the sound wave vibration signals of the water nozzle transmitted to the current sound wave repeaters so as to keep the amplitude of the amplified signals.
Preferably, the underground intelligent water distributor comprises a sound wave receiving module, a motor, a water nozzle connected with the motor, a pressure gauge, a flowmeter, a thermometer and a processor, wherein the pressure gauge is installed at a position close to a water outlet of the water nozzle and used for collecting fluid pressure signals in the layered water distribution process at regular time, the flowmeter is installed at a position close to the water outlet of the water nozzle and used for collecting water outlet flow signals in the layered water distribution process at regular time, the thermometer is installed at a position close to the water outlet of the water nozzle and used for collecting fluid temperature signals in the layered water distribution process at regular time, the processor is connected with the sound wave receiving module, the motor, the pressure gauge, the flowmeter and the thermometer and used for driving the motor to rotate by using the converted water nozzle sound wave action signals to control the opening degree of the water nozzle, and obtaining the feedback information of the fluid pressure signals, the water outlet flow signals and the fluid temperature signals in the layered water distribution process, respectively carrying out preprocessing and converting the feedback information into corresponding feedback information including the water outlet flow, the fluid pressure values and the fluid temperature values, outputting the feedback information according to preset corresponding feedback intervals, and the feedback information, and the processor is connected with the sound wave converting module and sending the information to the processor.
Preferably, the wellhead controller comprises a wellhead signal sending module and a wellhead signal receiving module, wherein the wellhead signal sending module is provided with a signal transmitting end arranged below the liquid level in the water distribution pipe column and is used for transmitting corresponding water nozzle sound wave action signals to the underground through the signal transmitting end after or more water distribution instructions sent from the remote server are subjected to digital-to-analog conversion and electric signal-to-sound signal processing, and the wellhead signal receiving module is provided with a signal receiving end arranged at the ground wellhead and is used for receiving the sound wave vibration signals sent underground through the signal receiving end, and after the sound signal-to-electric signal conversion, amplification, filtering and analog-to-digital conversion processing are carried out in steps, the feedback information is obtained and is transmitted to the remote server.
Compared with the prior art, or more embodiments in the above scheme can have the following advantages or beneficial effects:
the invention provides intelligent regulation and control systems for underground layered water distribution with wireless two-way signal transmission function, which realize wireless two-way communication transmission of data and instruction signals by using sound wave remote measurement technology, and have great significance for realizing fine layered water injection, saving manpower and material resources, improving technical level, informatization management and the like for oil field wells after realizing real-time two-way control.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification , together with the description serve to explain the invention and not to limit the invention.
Fig. 1 is a schematic general structural diagram of a system for intelligently measuring and adjusting downhole wireless layered water distribution according to an embodiment of the present application.
Fig. 2 is a schematic structural diagram of a downhole intelligent water distributor (4, 7 … …) in the system for intelligently measuring and adjusting downhole wireless layered water distribution according to the embodiment of the application.
Fig. 3 is a step diagram of a method for intelligently testing and adjusting downhole wireless layered water distribution according to an embodiment of the present application.
In the present application, the drawings are all schematic and are used only for illustrating the principles of the invention and are not drawn to scale.
Wherein the list of reference numerals is as follows:
1: shaft
th layer packer
3: water pipe column (oil pipe)
4: th intelligent water distributor
5: down sound wave signal (water nozzle sound wave action signal)
6: second layered packer
7: second intelligent water distributor
8: acoustic wave repeater
9: uplink sound wave signal (sound wave vibration signal)
10: wellhead setting and pressing device
11: well head signal controller
12: ground transmission line
13: remote signal transceiver
14: remote server
201: sound wave receiving module
202: electric machine
203: water tap
204: pressure gauge
205: flow meter
206: temperature meter
207: processor with a memory having a plurality of memory cells
208: filter cover
209: sound wave conversion module
2091: driving circuit
2092: acoustic wave converter
Detailed Description
The following detailed description of the embodiments of the present invention will be provided with reference to the drawings and examples, so that how to apply the technical means to solve the technical problems and achieve the technical effects can be fully understood and implemented. It should be noted that, as long as there is no conflict, the embodiments and the features of the embodiments of the present invention may be combined with each other, and the technical solutions formed are within the scope of the present invention.
The existing wireless measurement and distribution water technology can realize remote control, greatly improves the aspects of advancement, convenience, well bore adaptability and the like, but also has the problem of untimely feedback of underground measurement and distribution actions, and cannot monitor and regulate underground data in time. When the characteristic parameters such as formation pressure, temperature and permeability change, the injection amount cannot be sensed, identified, decided and adjusted in real time. The working condition of the underground pipe column cannot be controlled in time, so that the phenomena of low injection matching qualified rate, ineffective injection and the like are caused.
Therefore, in order to overcome the problems that the existing wireless measurement and distribution water distribution technology cannot realize underground wireless bidirectional transmission and cannot timely monitor and regulate underground data, the invention provides intelligent regulation and control systems which have the function of realizing wireless bidirectional transmission and are used for underground layered water distribution by utilizing a sound wave remote measurement technology.
Fig. 1 is a schematic general structural diagram of a system for intelligently measuring and adjusting downhole wireless layered water distribution according to an embodiment of the present application. As shown in FIG. 1, the system mainly comprises a shaft 1, a plurality of underground intelligent water distributors (4, 7 … …), a plurality of layered packers (2, 6 … …), a plurality of acoustic repeaters 8, a wellhead setting and pressing device 10, a wellhead control signal 11, a remote server 14 and the like. Wherein, the underground intelligent water distributor (4, 7 … …) is a tool short joint connected with the upper and lower water distribution pipe columns 3, and the upper part is provided with a water outlet. The layered packer (2, 6 … …) is used for carrying out interlayer isolation on different strata, preventing interlayer channeling, and can be set in a pressing mode through the wellhead setting pressing device 10.
The remote server 14 is connected to the wellhead control signal 11 through the ground transmission line 12 and the remote signal transceiver 13, it should be noted that, in this example, the connection manner of the remote server 14 and the wellhead control signal 11 is only specific examples of the present invention, and the present application is not limited to this, and may also communicate wirelessly.
, before the downhole separate layer water distribution operation is carried out, a water injection well needs to be designed, in embodiments, a separate layer water distribution pipe column is designed according to well condition parameters, the pipe column is formed by sequentially connecting a water distribution pipe column 3, a -th separate layer packer 2, a -th separate layer packer 6, an acoustic wave repeater 8, a -th intelligent water distributor 4, a second intelligent water distributor 7 and the like, each water injection layer is isolated by pressurizing through a wellhead setting and pressurizing device 10 through separate layer packers (2 and 6 … …), sets of downhole intelligent water distributors (4 and 7 … …) are installed at every layers, the separate layer packers (2 and 6 … …) are set after the pipe column enters the well, water nozzles are used for water injection until the water level reaches the wellhead, and the downhole intelligent water distributors (4 and 7 … …) can be adjusted to be in a closed state before the separate layer packers (2 and 6 … …) are set.
After the preparation of the layered water distribution process is completed, the control and flow part of the water distribution process is explained in detail.
The remote server 14 is connected with the wellhead controller 11, can acquire and analyze feedback information sent from the wellhead controller 11, and further generates water distribution instructions of multiple underground intelligent water distributors (4, 7 … …) needing to be adjusted according to the analysis result, specifically, the remote server can receive the feedback information sent from the wellhead controller 11, design new water distribution quantities for the multiple underground intelligent water distributors (4, 7 … …) installed in different stratums according to the feedback information and corresponding stratum water quantity demand conditions by using a water distribution adjusting model, judge and determine or multiple specified underground intelligent water distributors (4, 7 … …) needing to be adjusted, finally, convert the new water distribution quantities corresponding to the specified underground intelligent water distributors (4, 7 … …) needing to be adjusted into corresponding water distribution instructions, send the instructions to the wellhead controller 11, so that the underground intelligent water distributors needing to be adjusted in opening degree can be judged according to the feedback information reflecting stratum states and water distribution states, the actual stratum conditions are combined, the underground intelligent water distributors (4, 7) needing to be adjusted in opening degree adjustment are judged, the corresponding underground intelligent water distributors, the corresponding underground intelligent water distribution instructions are configured, and the corresponding opening degree information of the water distribution instructions are obtained, and the corresponding water distribution instructions are used for controlling the opening degree of the corresponding water distribution instructions (4, 7 … …), and the corresponding water distribution instructions for controlling the corresponding water distribution instructions (7 … …) of the corresponding water distribution instructions, wherein the corresponding water distribution instructions for controlling the corresponding opening.
The remote server 14 is used for analyzing the feedback information of stratum, and then the remote server is used for analyzing step, analyzing the current actual injection allocation flow and stratum state parameters of the stratum, then the analyzed parameters and the water distribution adjustment model are used for obtaining the ideal injection amount of the stratum, and the ideal injection amount is compared with the ideal injection amount if the comparison result exceeds the preset adjustment judgment threshold value, then the opening degree of the underground intelligent water distributor in the stratum is judged to need to be adjusted, the ideal injection amount is used as the new water distribution amount, and the corresponding opening degree and the opening duration time are set for the current underground intelligent water distributor based on the ideal injection amount, so that the corresponding water distribution instruction at least comprising the two data is generated.
The invention can adjust the opening degree of the water nozzles in each underground intelligent water distributor (4, 7 … …), initialize the water nozzles in the corresponding underground intelligent water distributor (4, 7 … …) to be in a closed state through a water distribution instruction, adjust the water distribution condition of each stratum, and simultaneously effectively reduce the electric quantity loss of the underground intelligent water distributor (4, 7 … …).
In addition, the remote server 14 is configured with a display capable of displaying the outlet flow, the fluid pressure value and the fluid temperature value in the analyzed feedback information, so that the manager can perform real-time monitoring on the device.
, the wellhead controller 11 is disposed on the surface near the wellhead and includes at least a wellhead signal sending module (not shown) having a signal transmitting end disposed below the liquid level in the water distribution string and a wellhead signal receiving module (not shown) having a signal receiving end disposed at the wellhead on the surface.
, after -key remote allocation is performed on the downhole layered flow by the remote server 14, the wellhead signal controller 11 acquires water distribution instructions of one or more designated downhole intelligent water distributors (4, 7 … …) to be adjusted, converts the water distribution instructions of the downhole intelligent water distributors (4, 7 … …) to be adjusted into corresponding water nozzle sound wave action signals (reduced into action codes), and sends corresponding water nozzle sound wave action signals to each downhole intelligent water distributor (4, 7 … …) to be adjusted through the water distribution pipe column 3 (using the water distribution pipe column 3 as a sound wave transmission channel), wherein each water distribution instruction contains water nozzle opening information and opening degree continuous control information of the corresponding downhole intelligent water distributor (4, 7 … …), so as to control the corresponding downhole intelligent water distributor (4, 7 … …) to complete layer allocation.
, the wellhead controller 11 can also receive the acoustic vibration signal representing the feedback information sent by each downhole intelligent water distributor (4, 7 … …) and convert the acoustic vibration signal into feedback information of the corresponding stratum, the information is transmitted to a central control room (remote server 14) of a management party through a transmission line or a wireless network to monitor the working state and the stratum water distribution state of each downhole intelligent water distributor (4, 7 … …). concretely, the wellhead signal receiving module in the wellhead controller 11 receives the acoustic vibration signal sent downhole through a signal receiving end, the acoustic vibration signal is restored into the feedback information of the corresponding stratum after the acoustic signal is converted into an electric signal, amplified, filtered and subjected to analog-to-digital conversion, and then the feedback information is transmitted to the remote server 14.
Next, the downhole intelligent water distributor (4, 7 … …) will be explained. Referring to FIG. 1, a downhole intelligent water distributor (4, 7 … …) is installed in a distributor string 3 and is positioned between adjacent zonal packers (2, 6 … …). The underground intelligent water distributor (4, 7 … …) can receive and recognize the sound wave action signal of the water nozzle, adjust the water nozzle in the underground intelligent water distributor to the opening degree matched with the sound wave action signal of the water nozzle, and start layered water distribution.
And , in the process of layered water distribution, each underground intelligent water distributor (4, 7 … …) can also collect feedback information including water outlet flow, fluid pressure value and fluid temperature value of the corresponding stratum at regular time, generate a sound wave vibration signal matched with the feedback information, and send the sound wave vibration signal to the ground in a time-sharing manner through the water distribution pipe column 3 (the water distribution pipe column 3 is used as a sound wave transmission channel).
Fig. 2 is a schematic structural diagram of a downhole intelligent water distributor (4, 7 … …) in a system for intelligently measuring and regulating downhole wireless layered water distribution according to an embodiment of the present application, as shown in fig. 2, in step , each downhole intelligent water distributor (4, 7 … …) at least comprises a sound
The acoustic
, a pressure gauge 204 is arranged at the water outlet close to the water nozzle 203 and can acquire fluid pressure signals in the layered water distribution process at regular time, a flow meter 205 is arranged at the water outlet close to the water nozzle 203 and can acquire water outlet flow signals in the layered water distribution process at regular time, and a temperature meter 206 is arranged at the water outlet close to the water nozzle 203 and can acquire fluid temperature signals in the layered water distribution process at regular time, wherein a real-time clock is stored in the processor 207 and is set for the acquisition process in advance, so that the processor 207 wakes up at the preset timing acquisition time and sends acquisition control instructions to the pressure gauge 204, the flow meter 205 and the temperature meter 206 respectively to control corresponding sensors to start acquisition work, and then the pressure gauge 204, the flow meter 205 and the temperature meter 206 are driven by the acquisition control instructions to acquire corresponding signals at regular time.
When the acquisition components at least comprising the pressure gauge 204, the flow meter 205 and the temperature gauge 206 acquire fluid pressure signals, effluent flow signals and fluid temperature signals which can represent the current formation state and water distribution state, the processor 207 connected with the three acquisition components acquires the signals of different types acquired by the acquisition components in the layered water distribution process, and converts the signals into corresponding feedback information comprising effluent flow, fluid pressure values and fluid temperature values after series of preprocessing such as amplification, analog-to-digital conversion, coding and integration, and the like, and the feedback information can be stored in real time by the processor 207, so that managers can conveniently call the stored historical feedback information in the later period.
In addition, in order to prevent a signal collision phenomenon which may be caused when a sound wave action signal of a descending water nozzle and sound wave vibration signals representing feedback information are sent by different underground intelligent water distributors (4, 7 … …), a preset feedback control time interval for the current underground intelligent water distributor is stored in the processor 207 of each underground intelligent water distributor (4, 7 … …) (wherein the feedback control time intervals corresponding to each underground intelligent water distributor are different). In this way, the processor 207 in the downhole intelligent water distributor (4, 7 … …) takes the preset timing acquisition time as a starting point, sends the feedback information to the sound wave conversion module 209 according to the corresponding feedback control time interval preset in the downhole intelligent water distributor, and returns the corresponding sound wave vibration signal to the wellhead controller 11 after the conversion work of the sound wave conversion module 209 is completed, thereby realizing the function of sending the sound wave vibration signal to the ground in a time-sharing manner. Therefore, according to the setting of the timing acquisition time, the corresponding clock time of the sound wave action signal of the water nozzle in the descending direction and the corresponding clock time of each sound wave vibration signal in the ascending direction can be staggered.
The feedback control time interval is based on preset timing acquisition time in a real-time clock, the time of each underground intelligent water distributor for sending the uplink sound wave vibration signal is determined by combining the bottom hole depth of the underground intelligent water distributor, the transmission time of the downlink instruction signal and the underground transmission rate of the sound wave signal, and the feedback control time interval corresponding to each underground intelligent water distributor (4, 7 … …) is determined by steps.
, the acoustic conversion module 209 is connected to the processor 207. the acoustic conversion module 209 includes a driving circuit 2091 and an acoustic converter 2092, wherein the acoustic converter 2092 is a energy conversion device that can convert electrical energy into acoustic energy. the acoustic converter 2092 converts the electrical signal into mechanical vibration and then generates acoustic wave by the mechanical vibration. for the low frequency and high power acoustic transducer 2092, it is beneficial to directly transmit the acoustic wave signal on the channel such as oil pipe or drill string.
In addition, the system for intelligently measuring and adjusting the underground wireless layered water distribution further comprises a plurality of sound wave repeaters 8. Referring to fig. 1, acoustic repeaters 8 are installed at preset repeater distribution intervals on the outer wall of a distribution pipe string 3 (acoustic transmission channel). Due to the particularity of the transmission of sound waves in the underground environment, the attenuation of the sound waves in the signal transmission process is large, and sound wave signals finally reaching a wellhead controller 11 are possibly difficult to receive, so that the sound wave repeater 8 is arranged on the outer wall of the water distribution pipe column and can perform relay transmission on the uplink sound wave signals 9 and the downlink sound wave signals 5. That is, each acoustic wave repeater 8 can amplify the acoustic wave action signal or the acoustic wave vibration signal transmitted to the water nozzle in the current acoustic wave repeater 8 to maintain the amplitude of the amplified signal.
In step S310, the wellhead controller 11 obtains water distribution commands of one or more designated downhole intelligent water distributors (4, 7 … …) to be adjusted, converts the water distribution commands into corresponding water nozzle sound wave action signals, and sends the sound wave action signals to the downhole through the water distribution pipe column 3, wherein each water nozzle water distribution command comprises water nozzle opening degree information and opening degree continuous control information of the corresponding downhole intelligent water distributor (4, 7 … …), and then the process goes to step S320.
And then (step S320), the appointed underground intelligent water distributor (4, 7 … …) receives the corresponding water nozzle sound wave action signal, adjusts the water nozzle 203 in the underground intelligent water distributor to the opening degree matched with the water nozzle sound wave action signal, and starts layered water distribution work.
Then, step S330 is executed, in the implementation process of layer water distribution, each downhole intelligent water distributor (4, 7 … …) periodically collects feedback information including effluent flow, fluid pressure value and fluid temperature value of the corresponding stratum, generates a sound wave vibration signal matched with the feedback information, and sends the sound wave vibration signal to the ground in a time-sharing manner through the water distribution pipe column 3. Wherein, the underground intelligent water distributor (4, 7 … …) returns the sound wave vibration signal to the wellhead controller 11 according to the preset corresponding feedback control time interval. The feedback control time interval is determined based on a preset timing acquisition moment in a real-time clock, and the bottom hole depth of the underground intelligent water distributor (4, 7 … …) and the signal transmission rate are combined.
, in step S340, the wellhead controller 11 receives the sound wave vibration signal sent by each downhole intelligent water distributor (4, 7 … …) and restores the sound wave vibration signal to the feedback information of the corresponding stratum so as to monitor the working state of the downhole intelligent water distributor (4, 7 … …) and the stratum water distribution state.
Finally, after the obtaining work of the feedback data is completed, steps are carried out, step S350 is carried out, the remote server 14 obtains and analyzes the feedback information, and generates water distribution instructions of the downhole intelligent water distributors (4, 7 … …) which need to be adjusted according to the analysis result, specifically, the remote server 14 receives and analyzes all the feedback information, sets new water distribution quantities for the downhole intelligent water distributors (4, 7 … …) installed in different stratums according to the feedback information and in combination with the requirement conditions of the corresponding stratum water quantities, judges and determines or more specified downhole intelligent water distributors (4, 7 … …) which need to be adjusted, and then converts the water distribution quantities corresponding to the specified downhole intelligent water distributors into water distribution instructions to be sent to the wellhead controller 11.
In addition, in order to prevent the attenuation phenomenon of the sound wave transmission channel, the sound wave repeaters 8 are arranged on the outer wall of the water distribution pipe column 3 at preset repeater distribution intervals, and the sound wave action signals or the sound wave vibration signals of the water nozzle transmitted to the current sound wave repeaters 8 are amplified so as to keep the amplitude of the amplified signals.
The invention relates to methods and systems for intelligent testing and adjusting underground wireless layered water distribution with underground wireless two-way transmission function, which can realize two-way wireless signal transmission of water injection well data and instructions, realize remote control by combining a ground mobile network, monitor underground water distribution state, formation parameters and other underground data in real time, test related parameters without specially entering a layered test instrument , simplify the process, reduce the workload of field separate injection and allocation and improve the development benefit of oilfield water injection.
The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
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