CN106894786B - Low-permeability reservoir water shutoff profile control online monitoring system and method - Google Patents
Low-permeability reservoir water shutoff profile control online monitoring system and method Download PDFInfo
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- E21B33/00—Sealing or packing boreholes or wells
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- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
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Abstract
The invention discloses a low permeability oil reservoir water shutoff profile control on-line monitoring system and a method, the system comprises a water injection subsystem of a water distribution station, a water injection well profile control subsystem and a control subsystem, wherein the water injection well profile control subsystem comprises a dosing barrel, a solution tank and an injection pump, an accurate metering pump is arranged between the dosing barrel and the solution tank, a pressure gauge and a pressure transmitter are arranged at the wellhead end of a water injection well, and the control subsystem comprises a data analysis processor, a timer and a data transmission unit; the method comprises the following steps: 1. initializing a monitoring system; 2. reading the actual pressure value of the water injection well; 3. monitoring operation of the system; 4. judging whether the monitoring system works normally or not; 5. judging whether the current pressure actual value of the water injection well rises to a water injection well pressure prediction threshold value or not; 6. alarming and prompting and stopping the operation of the water injection well profile control subsystem; 7. and generating a data report and remotely transmitting the data report. The invention realizes continuous liquid preparation and injection, real-time on-line monitoring and profile control and ensures the construction effect.
Description
Technical Field
The invention belongs to the technical field of profile control of water injection wells, and particularly relates to a water shutoff profile control online monitoring system and method for a low-permeability oil reservoir.
Background
At present, a solution tank is mostly adopted to prepare a large amount of profile control agents at one time on a water plugging and profile control site of a low-permeability oil reservoir, in actual use, the large amount of profile control agents prepared at one time are all pumped into a water injection well for water plugging, the using amount of the profile control agents cannot be accurately metered, the excess or deficiency of the profile control agents is easily caused, the excess of the profile control agents causes resource waste and increases cost, the water plugging effect is not good due to the deficiency of the profile control agents, continuous liquid preparation cannot be realized under the condition that continuous liquid preparation and continuous metering devices are not available on the site, the implementation of a profile control and water plugging process is directly influenced, and special profile control and water plugging equipment meeting the requirements of the profile control and water plugging process is designed and cannot be controlled; therefore, at present, an online monitoring system and an online monitoring method for water shutoff and profile control of a low-permeability oil reservoir are lacked, so that the purposes of meeting the corresponding cooperative relation among injection pressure, injection time, injection displacement and accumulated injection amount, ensuring injection of a large amount of profile control liquid, ensuring that the plugging agent does not cross-link, precipitate and expand early and ensuring the profile control and water shutoff effects are achieved in the construction process.
Disclosure of Invention
The invention aims to solve the technical problem of providing an online monitoring system for water shutoff and profile control of a low-permeability reservoir, which is novel and reasonable in design, realizes continuous liquid preparation of a profile control agent, meets the dynamic adjustment of the required amount of profile control liquid of a water injection well, monitors the profile control in real time on line, ensures the construction effect and is convenient to popularize and use.
In order to solve the technical problems, the invention adopts the technical scheme that: low permeability oil reservoir water shutoff profile control on-line monitoring system, its characterized in that: comprises a water injection subsystem of a water distribution station, a water injection well profile control subsystem and a control subsystem for monitoring the operation of the water injection well profile control subsystem on line, the water injection well profile control subsystem comprises an injection pipeline, a dosing barrel, a solution tank and an injection pump, wherein the dosing barrel is sequentially arranged on the injection pipeline and used for dispensing a profile control agent, the solution tank is used for storing the dispensed profile control agent, the injection pump is used for pumping the profile control agent into the water injection well, the pipe section communicated between the medicine adding barrel and the solution tank on the injection pipeline is a metal hose, a precise metering pump is arranged on the metal hose, an electromagnetic flowmeter used for collecting the flow of the profile control agent output by the solution tank is arranged on a pipe section communicated between the solution tank and the injection pump on the injection pipeline, a stirrer used for uniformly stirring the profile control agent is arranged in the chemical adding barrel, a radar liquid level meter is arranged at the top end of the solution tank, a pressure meter used for collecting and displaying the water injection pressure of a water injection subsystem of a water distribution station to the water injection well and a pressure transmitter connected with the pressure meter are arranged at the well head end of the water injection well, the control subsystem comprises a data analysis processor, a memory, a timer, a USB interface for data copying and a data transmission unit for remotely transmitting the water shutoff profile control field working condition of the low permeability reservoir, wherein the memory, the timer, the USB interface and the data transmission unit are all connected with the data analysis processor, the input end of the data analysis processor is connected with a video collector for collecting the water shutoff profile control field working condition information of the low permeability reservoir, the output end of the data analysis processor is connected with an audible and visual alarm, a display screen and a steering engine module for driving a holder to rotate, the video collector is arranged on the holder, a radar liquid level gauge, a pressure transmitter, an electromagnetic flow meter and the video collector are all connected with the input end of the data analysis processor through the field data collection unit, the data transmission unit comprises a router, a server and a public network port, wherein the server and the public network port are both connected with the router.
The water shutoff profile control on-line monitoring system for the low-permeability oil reservoir is characterized in that: the system also comprises a numerical control platform, wherein the numerical control platform is communicated with the data analysis processor through a router, and the output end of the numerical control platform is connected with a printer.
The water shutoff profile control online monitoring system for the low-permeability reservoir is characterized in that: the port of the public network is a peanut rod with a peanut shell embedded therein.
The water shutoff profile control online monitoring system for the low-permeability reservoir is characterized in that: the field data acquisition unit comprises a plurality of paths of program-controlled amplification amplifiers and data acquisition cards which are connected with the plurality of paths of program-controlled amplification amplifiers.
The water shutoff profile control online monitoring system for the low-permeability reservoir is characterized in that: the programmable booster amplifier is a PGA205 programmable gain instrumentation amplifier.
The water shutoff profile control on-line monitoring system for the low-permeability oil reservoir is characterized in that: the video collector is a high-definition camera with adjustable focal length, and the high-definition camera transmits video images to the data analysis processor through a coaxial video cable.
Meanwhile, the invention also discloses a method which has simple steps and reasonable design, can detect the profile control effect and monitor the on-site working condition in real time and on line, and is characterized by comprising the following steps:
step one, initializing a monitoring system: firstly, initializing a monitoring system in a power-on reset mode to determine the normal use of the monitoring system; then, setting a water injection well pressure prediction threshold value, and storing the water injection well pressure prediction threshold value in a memory;
step two, reading the pressure actual value of the water injection well: the water injection subsystem of the water distribution room is used for injecting pressure into a water injection well, a pressure transmitter is used for acquiring the pressure of the water injection well, the pressure value of the water injection well is preprocessed through a field data acquisition unit, an actual pressure value of the water injection well is obtained and transmitted to a data analysis processor, meanwhile, a remote monitor can use a remote terminal to remotely access a router through a public network port and check video picture information acquired by a video acquisition unit, the video acquisition unit is a high-definition camera with adjustable focal length, the data analysis processor drives a holder to transmit, the high-definition camera dynamically acquires field picture information and checks an actual pressure value of the water injection well actually measured by a pressure gauge, and the actual pressure value is not greater than a pressure prediction threshold value of the water injection well;
step three, monitoring the operation of the system: firstly, a constructor on a profile control site prepares a profile control agent to be used in a chemical adding barrel according to the proportion of adding liquid, and simultaneously adopts a stirrer to stir the profile control agent to be used, which is prepared in the chemical adding barrel, so as to ensure that the profile control agent to be used is fully and uniformly dissolved; then, according to a pre-obtained predicted value of the depth of the low-permeability reservoir, calculating the speed of feeding the profile control agent into the section of the permeation channel, wherein the time of cross-linking of the profile control agent is determined after the profile control agent is configured, a radar liquid level meter is adopted to obtain the liquid level height of the profile control agent, a data analysis processor controls the speed of pumping out the profile control agent by a filling pump, and an electromagnetic flow meter acquires the output flow of the profile control agent; finally, recording the actual injection time of the injection pressure of the water injection subsystem of the water distribution station for the water injection well by using a timer, and reading the current actual pressure value of the water injection well in real time;
step four, judging whether the monitoring system works normally: setting an injection time threshold value of a water injection subsystem of the water distribution room for the injection pressure of the water injection well, which does not change along with time, in advance through a data analysis processor, storing the injection time threshold value in a memory, and when the actual injection time recorded by a timer is greater than the injection time threshold value stored in the memory, indicating that the monitoring system does not work normally, and executing a sixth step; when the actual injection time recorded by the timer is not greater than the injection time threshold value stored in the memory, the monitoring system works normally, and the fifth step is executed;
step five, judging whether the current pressure actual value of the water injection well rises to a water injection well pressure prediction threshold value: when the current pressure actual value of the water injection well is smaller than the pressure prediction threshold value of the water injection well, the third step is circulated; when the current pressure actual value of the water injection well rises to the pressure prediction threshold value of the water injection well, executing a sixth step;
and step six, alarming and prompting and stopping the operation of the water injection well profile control subsystem: the data analysis processor controls the audible and visual alarm to prompt field constructors to check the working state of the monitoring system, and controls the filling pump and the accurate metering pump to stop running;
step seven, generating a data report and remotely transmitting the data report: the data analysis processor draws data collected by the radar liquid level meter, the pressure transmitter and the electromagnetic flow meter into curves and generates a data report, and monitoring information reflected by the data report is remotely transmitted on line through the router.
The method is characterized in that: the field data acquisition unit comprises a plurality of paths of program-controlled amplification amplifiers and data acquisition cards which are connected with the plurality of paths of program-controlled amplification amplifiers, and the field data acquisition unit carries out filtering amplification pretreatment on the pressure value of the water injection well; the remote terminal is a mobile phone or a computer.
The method is characterized in that: adopt ultrasonic detector to acquire hyposmosis oil reservoir degree of depth predicted value in advance in the third step, adopt the radar level gauge to acquire the liquid level height of profile control agent, set for the liquid level height threshold value of solution tank through data analysis processor, when the liquid level height that the radar level gauge acquireed the profile control agent was less than the liquid level height threshold value of solution tank, pump into the profile control agent to the solution tank through accurate measuring pump, when the liquid level height that the radar level gauge acquireed the profile control agent was not less than the liquid level height threshold value of solution tank, accurate measuring pump was out of work.
Compared with the prior art, the invention has the following advantages:
1. the on-line monitoring system for water shutoff and profile control of the low-permeability reservoir, which is adopted by the invention, adopts the dosing barrel to stir and feed liquid so as to ensure that the profile control liquid is uniformly configured, and adopts the accurate metering pump to accurately pump the profile control liquid with the actually required amount, thereby avoiding the waste of the solution caused by pumping all the prepared profile control liquid into the water injection well at one time, and being convenient for popularization and use.
2. The low-permeability oil reservoir water shutoff profile control online monitoring system meets the corresponding cooperative relation among injection pressure of a water injection well, injection time of profile control liquid, injection displacement and accumulated injection amount through the cooperation among a water distribution station water injection subsystem, a water injection well profile control subsystem and a control subsystem, is reliable and stable, has good use effect, simultaneously adopts wireless data remote transmission, realizes support of a public network through installing a public network port on a router, and meets the remote online monitoring effect of a monitor.
3. The method adopted by the invention compares the pressure value of the water injection well with the given pressure prediction threshold value of the water injection well in real time, and simultaneously judges the working state of the profile control subsystem of the water injection well according to the change time of the pressure value.
In conclusion, the invention has novel and reasonable design, realizes the continuous liquid preparation of the profile control agent, meets the dynamic regulation of the required amount of the profile control liquid of the water injection well, monitors the profile control on line in real time, ensures the construction effect and is convenient for popularization and use.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
FIG. 1 is a schematic structural diagram of the water shutoff profile control online monitoring system for a low permeability reservoir of the present invention.
FIG. 2 is a schematic circuit diagram of the permeable oil reservoir water shutoff profile control on-line monitoring system of the present invention.
FIG. 3 is a block flow diagram of the method of the present invention.
Description of reference numerals:
Detailed Description
As shown in fig. 1 and 2, the low permeability reservoir water shutoff profile control online monitoring system of the invention comprises a water injection subsystem 1 of a water distribution plant, a water injection well profile control subsystem and a control subsystem for online monitoring the operation of the water injection well profile control subsystem, wherein the water injection well profile control subsystem comprises an injection pipeline, a dosing barrel 12 for dosing a profile control agent, a solution tank 10 for storing the dosed profile control agent and an injection pump 7 for pumping the profile control agent into the water injection well 2, which are sequentially arranged on the injection pipeline, a pipe section communicated between the dosing barrel 12 and the solution tank 10 on the injection pipeline is a metal hose 14, an accurate metering pump 11 is arranged on the metal hose 14, an electromagnetic flowmeter 8 for collecting the flow of the profile control agent output by the solution tank 10 is arranged on the pipe section communicated between the solution tank 10 and the injection pump 7 on the injection pipeline, a stirrer 13 for uniformly stirring the profile control agent is arranged in the dosing barrel 12, a radar level gauge 9 is installed at the top end of the solution tank 10, a pressure gauge 5 for collecting and displaying the water injection pressure of the water injection subsystem 1 to the water injection well 2 and a pressure transmitter 6 connected with the pressure gauge 5 are arranged at the wellhead end of the water injection well 2, the control subsystem comprises a data analysis processor 19, a memory 17, a timer 16, a USB interface 24 for data copying and a data transmission unit for remotely transmitting the working conditions of the low-permeability water plugging profile control field, the input end of the data analysis processor 19 is connected with a video acquisition unit 15 for collecting the working condition information of the low-permeability oil reservoir water plugging profile control field, the output end of the data analysis processor 19 is connected with an audible and visual alarm 23, a display screen 20 and a steering engine module 21 for driving a cloud deck 22 to rotate, video collector 15 installs on cloud platform 22, and radar level gauge 9, pressure transmitter 6, electromagnetic flow meter 8 and video collector 15 all are connected with data analysis processor 19's input through on-the-spot data acquisition unit 18, data transmission unit includes router 25 and all server 26 and public network port 27 be connected with router 25.
The injection pipeline is sequentially provided with the dosing barrel 12, the solution tank 10 and the injection pump 7, the purpose is to pump a profile control agent into the water injection well 2 from the configuration to realize the integrated design, the situation that a large amount of profile control liquid is configured at one time and is completely injected into the water injection well 2 is avoided, the controllable operation of the flow of the profile control liquid in the water injection well 2 is realized, the metal hose 14 is arranged to lead the profile control agent prepared in the dosing barrel 12 into the solution tank 10, the arbitrary arrangement positions of the dosing barrel 12 and the solution tank 10 are convenient, the ground dosing can be met, the high-altitude operation of workers is prevented, and the potential safety hazard is reduced; the accurate metering pump 11 is arranged to realize the timed and quantitative input of the profile control liquid and ensure the stability and the accuracy of the addition of the profile control liquid, the electromagnetic flow meter 8 is adopted to accumulate the usage amount of the profile control liquid, the radar liquid level meter 9 is arranged to detect the height of the liquid level in the solution tank 10, in the practical use, the height of the liquid level in the solution tank 10 cannot be too high or too low, the height of the liquid level in the solution tank 10 is too high, the pressure of the solution tank 10 is easy to be overlarge, even the solution overflows, the height of the liquid level in the solution tank 10 is too low, the shortage of the liquid storage amount in the solution tank 10 is easy to be caused, and the demand of the injection pump 7 is insufficient; the pressure gauge 5 and the pressure transmitter 6 are arranged to simultaneously acquire pressure values of the water injection well 2, the pressure gauge 5 can meet the requirement of site construction personnel to quickly and visually observe the pressure values, the pressure transmitter 6 can transmit pressure data of the water injection well 2 to the control subsystem, the timer 16 is arranged to calculate water injection time and avoid that the oil injection well is supplied with more water due to long-time water injection to the permeation channel 4 without awareness and the oil extraction rate is reduced, the USB interface 24 is arranged to avoid that data cannot be acquired without a network, a USB (universal serial bus) disk is inserted into the USB interface 24 to directly copy data acquired by the data analysis processor 19, historical curves and video pictures are manufactured for later reference, the cradle head 22 is arranged to install the video collector 15 and drive the video collector 15 to rotate through rotation of the cradle head 22, the acquisition of 360-degree field video image information without dead angles is realized, the change precision of the rotating angle of the cradle head 22 is controlled by the control system 26 to introduce a network environment, the video collector 25 is arranged to connect equipment to the network, the network can realize that on-site video information acquisition equipment can be acquired through a fixed IP (Internet protocol) communication port of a mobile phone, and the on-site construction personnel can realize on-site monitoring and on-site monitoring through a communication network, and on-site monitoring system, and on-site monitoring equipment, and on-site monitoring of a steering engine 27.
The preferable pressure transmitter 6 adopts a pressure transmitter with a pressure measurement range of 0-40 MPa to meet the requirement of water injection pressure data acquisition, and the pressure gauge 5 adopts a stainless steel pressure gauge and has good anti-vibration effect.
As shown in fig. 1, in this embodiment, the system further includes a numerical control platform 28, the numerical control platform 28 communicates with the data analysis processor 19 through the router 25, and an output end of the numerical control platform 28 is connected to a printer.
The numerical control platform 28 preferably adopts an industrial personal computer for collecting and storing on-site integral data, processing later-stage data, generating reports and installing printers, so as to meet printing requirements.
In this embodiment, the public network port 27 is a peanut stick with embedded peanut shells.
In this embodiment, the field data collecting unit 18 includes multiple program-controlled amplifier and a data collecting card connected to the multiple program-controlled amplifier, where the program-controlled amplifier is a PGA205 programmable gain instrument amplifier.
In practical use, data collected by the electromagnetic flow meter, the radar liquid level meter and the pressure transmitter are all output through 4-20 mA current signals, the field data collecting unit 18 is arranged for converting the current signals into voltage signals, filtering, removing dryness and amplifying the voltage signals and meeting the processing requirements of the data analysis processor 19, the data analysis processor 19 preferably adopts an Intel to strong E5-1650v2 processor, and the low-power-consumption response time is short.
In this embodiment, the video collector 15 is a high-definition camera with an adjustable focal length, and the high-definition camera transmits a video image to the data analysis processor 19 through a coaxial video cable.
As shown in FIG. 3, the method for online monitoring of water shutoff and profile control of a low permeability reservoir comprises the following steps:
step one, initializing a monitoring system: firstly, initializing a monitoring system in a power-on reset mode to determine the normal use of the monitoring system; then, setting a water injection well pressure prediction threshold value, and storing the water injection well pressure prediction threshold value in a memory 17;
step two, reading the pressure actual value of the water injection well: the water injection subsystem 1 of the water distribution room is used for injecting pressure into a water injection well 2, a pressure transmitter 6 is used for acquiring the pressure of the water injection well 2, the pressure value of the water injection well 2 is preprocessed through a field data acquisition unit 18, the actual pressure value of the water injection well 2 is obtained and transmitted to a data analysis processor 19, meanwhile, a remote monitor can use a remote terminal to remotely access a router 25 through a public network port 27 and check video picture information acquired by a video acquisition unit 15, the video acquisition unit 15 is a high-definition camera with adjustable focal length, a holder 22 is driven by the data analysis processor 19 to transmit, the high-definition camera dynamically acquires field picture information and checks the actual pressure value of the water injection well 2 actually measured by a pressure gauge 5, and the actual pressure value is not greater than a water injection well pressure prediction threshold value;
the water injection well pressure prediction threshold is a pressure value when the permeation channel 4 in the water injection well 2 is completely sealed and does not seep water, and the actual pressure value is not larger than the water injection well pressure prediction threshold and meets the actual pressure measurement state.
Step three, monitoring the operation of the system: firstly, a constructor on a profile control site configures a profile control agent to be used in a dosing barrel 12 according to the proportion of a dosing liquid, and simultaneously adopts a stirrer 13 to stir the profile control agent to be used configured in the dosing barrel 12, so as to ensure that the profile control agent to be used is fully and uniformly dissolved, and after the configuration of the profile control agent to be used is successful, the profile control agent to be used is pumped into a solution tank 10 through a precision metering pump 11; then, according to a pre-obtained predicted value of the depth of the low-permeability reservoir, calculating the speed of feeding the profile control agent into the section of the permeation channel, wherein the time of cross-linking of the profile control agent is determined after the profile control agent is configured, a radar liquid level meter 9 is adopted to obtain the liquid level height of the profile control agent, a data analysis processor 19 controls the speed of pumping out the profile control agent by a filling pump 7, and an electromagnetic flow meter 8 collects the flow used by outputting the profile control agent; finally, recording the actual injection time of the injection pressure of the water injection subsystem 1 of the water distribution room for the water injection well 2 by using a timer 16, and reading the current actual pressure value of the water injection well 2 in real time;
step four, judging whether the monitoring system works normally: presetting an injection time threshold value, which is used for ensuring that the injection pressure of the water injection subsystem 1 of the water distribution station does not change along with the time, for the water injection well 2 through a data analysis processor 19, storing the injection time threshold value in a memory 17, and when the actual injection time recorded by a timer 16 is greater than the injection time threshold value stored in the memory 17, indicating that the monitoring system works abnormally, and executing a step six; when the actual injection time recorded by the timer 16 is not greater than the injection time threshold value stored in the memory 17, it indicates that the monitoring system is working normally, and step five is executed;
by comparing the actual injection time recorded by the timer 16 with the injection time threshold stored in the memory 17, the water injection subsystem 1 of the water distribution station can not unlimitedly prolong the water injection time of the water injection well 2, thereby avoiding water impurities brought to the oil well, reducing the oil recovery rate, needing to adjust the profile control position in time and carrying out the real-time water injection profile control technology.
Step five, judging whether the current pressure actual value of the water injection well rises to a water injection well pressure prediction threshold value: the current pressure actual value of the water injection well 2 is obtained by the pressure transmitter 6 or the pressure gauge 5, and when the current pressure actual value of the water injection well 2 is smaller than the pressure prediction threshold value of the water injection well, the step three is circulated; when the current pressure actual value of the water injection well 2 rises to the pressure prediction threshold value of the water injection well, executing a sixth step;
step six, alarming and prompting and stopping the operation of the water injection well profile control subsystem: the data analysis processor 19 controls the audible and visual alarm 23 to prompt field constructors to check the working state of the monitoring system, and simultaneously the data analysis processor 19 controls the filling pump 7 and the accurate metering pump 11 to stop running;
two conditions occur when the alarm prompts and the water injection well profile control subsystem stops working, namely, the actual injection pressure time recorded by the timer 16 is too long, and the water plugging fails; and secondly, when the current pressure actual value of the water injection well 2 rises to the pressure prediction threshold value of the water injection well, water is successfully blocked, and the type of the alarm prompt is identified through data transmission or acquisition.
Step seven, generating a data report and remotely transmitting the data report: the data analysis processor 19 plots the data collected by the radar liquid level meter 9, the pressure transmitter 6 and the electromagnetic flow meter 8 into a curve to generate a data report, and transmits the monitoring information reflected by the data report on line in a remote way through the router 25.
In this embodiment, in the second step, the field data acquisition unit 18 includes a plurality of program-controlled amplification amplifiers and a data acquisition card connected to the plurality of program-controlled amplification amplifiers, and the field data acquisition unit 18 performs filtering amplification pretreatment on the pressure value of the water injection well 2; the remote terminal is a mobile phone or a computer.
In this embodiment, adopt ultrasonic detector to acquire hyposmosis oil reservoir degree of depth predicted value in advance in step three, adopt radar level gauge 9 to acquire the liquid level height of profile control agent, set for the liquid level height threshold value of solution tank 10 through data analysis treater 19, when the liquid level height that radar level gauge 9 acquireed the profile control agent is less than the liquid level height threshold value of solution tank 10, pump into the profile control agent to solution tank 10 through accurate measuring pump 11, when the liquid level height that radar level gauge 9 acquireed the profile control agent is not less than the liquid level height threshold value of solution tank 10, accurate measuring pump 11 is out of work.
In this embodiment, the liquid level that will the job site real-time demonstration, the profile control agent flow that uses, the pressure and the on-the-spot video image information transmission of water injection well 2 to numerical control platform 28 or remote terminal, to the liquid level of gathering, flow, pressure parameter drawing history curve and data report form supply the post analysis to handle, and convenience simple to use need not to carry out professional training to the user.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, changes and equivalent structural changes made to the above embodiment according to the technical spirit of the present invention still fall within the protection scope of the technical solution of the present invention.
Claims (8)
1. A method for carrying out online monitoring on water shutoff profile control of a low-permeability reservoir by using an online monitoring system for water shutoff profile control of the low-permeability reservoir is characterized by comprising the following steps: low permeability oil reservoir water shutoff profile control on-line monitoring system includes water injection subsystem (1) of water distribution room, water injection well profile control subsystem and is used for on-line monitoring the control subsystem of water injection well profile control subsystem operation, water injection well profile control subsystem includes the injection pipeline and sets gradually be used for allotting profile control agent on the injection pipeline add medicine bucket (12), be used for saving the profile control agent of allotting solution jar (10) and to water injection well (2) pump income profile control agent injection pump (7), the pipeline section that feeds through between medicine bucket (12) and solution jar (10) is metal collapsible tube (14) on the injection pipeline, install accurate measuring pump (11) on metal collapsible tube (14), be provided with on the pipeline section of intercommunication between solution jar (10) and injection pump (7) and be used for gathering the profile control agent flow of solution jar (10) output electromagnetic flowmeter (8), add be provided with in medicine bucket (12) and be used for evenly stirring the mixer (13) of profile control agent, radar level gauge (9) are installed on the top of solution jar (10), and water injection well (2) the end is used for gathering and shows that the profile control pressure gauge (5) and water injection well (5) are connected with the analysis data processing sub-unit (5) and water injection well (17) and water injection well (2) and water injection analysis data processing system (17), and water injection analysis pressure analysis meter (17) are connected to be connected between the top analysis data processing sub-pressure analysis meter (17) including the equal processing sub-pressure analysis meter (17) of being used for the sample processing sub-tank (5) and being connected, the system comprises a timer (16), a USB interface (24) for copying data and a data transmission unit for remotely transmitting the water shutoff and profile control field working condition of the low-permeability oil reservoir, wherein the input end of a data analysis processor (19) is connected with a video collector (15) for collecting the water shutoff and profile control field working condition information of the low-permeability oil reservoir, the output end of the data analysis processor (19) is connected with an audible and visual alarm (23), a display screen (20) and a steering engine module (21) for driving a cloud deck (22) to rotate, the video collector (15) is installed on the cloud deck (22), a radar liquid level meter (9), a pressure transmitter (6), an electromagnetic flowmeter (8) and the video collector (15) are all connected with the input end of the data analysis processor (19) through a field data collection unit (18), and the data transmission unit comprises a router (25), a server (26) and a public network port (27), wherein the server and the server are all connected with the router (25);
the method comprises the following steps:
step one, initializing a monitoring system: firstly, initializing a monitoring system in a power-on reset mode, and determining the normal use of the monitoring system; then, setting a water injection well pressure prediction threshold value, and storing the water injection well pressure prediction threshold value in a memory (17);
step two, reading the pressure actual value of the water injection well: the water injection subsystem (1) of the water distribution station is used for injecting pressure into a water injection well (2), a pressure transmitter (6) is used for acquiring the pressure of the water injection well (2), the pressure value of the water injection well (2) is preprocessed through a field data acquisition unit (18), the actual pressure value of the water injection well (2) is obtained and is transmitted to a data analysis processor (19), meanwhile, a remote monitor can remotely access a router (25) through a public network port (27) by using a remote terminal to check video picture information acquired by a video acquisition unit (15), the video acquisition unit (15) is a high-definition camera with adjustable focal length, a cloud deck (22) is driven to transmit through the data analysis processor (19), the high-definition camera dynamically acquires the field picture information and checks the actual pressure value of the water injection well (2) actually measured by a pressure gauge (5), and the actual pressure value is not greater than a water injection well pressure prediction threshold value;
step three, monitoring the operation of the system: firstly, a constructor on a profile control site configures a profile control agent to be used in a dosing barrel (12) according to the proportion of a dosing liquid, and simultaneously, a stirrer (13) is adopted to stir the profile control agent to be used configured in the dosing barrel (12) to ensure that the profile control agent to be used is fully and uniformly dissolved, and after the configuration of the profile control agent to be used is successful, the profile control agent is pumped into a solution tank (10) through a precise metering pump (11); then, calculating the speed of feeding the profile control agent into the section of the permeation channel according to the pre-obtained predicted value of the depth of the low-permeability reservoir, wherein the cross-linking time of the profile control agent is determined after the profile control agent is prepared, obtaining the liquid level height of the profile control agent by adopting a radar liquid level meter (9), controlling the speed of pumping the profile control agent out of a filling pump (7) by a data analysis processor (19), and simultaneously collecting the flow used by outputting the profile control agent by an electromagnetic flow meter (8); finally, recording the actual injection time of the injection pressure of the water injection subsystem (1) of the water injection well (2) by adopting a timer (16), and reading the actual value of the current pressure of the water injection well (2) in real time;
step four, judging whether the monitoring system works normally: an injection time threshold value of a water injection subsystem (1) of the water distribution station for enabling the injection pressure of a water injection well (2) not to change along with time is preset through a data analysis processor (19) and stored in a memory (17), and when the actual injection time recorded by a timer (16) is larger than the injection time threshold value stored in the memory (17), the monitoring system is abnormal in operation, and a sixth step is executed; when the actual injection time recorded by the timer (16) is not greater than the injection time threshold value stored in the memory (17), the monitoring system works normally, and a fifth step is executed;
step five, judging whether the current pressure actual value of the water injection well rises to a water injection well pressure prediction threshold value: when the current pressure actual value of the water injection well (2) is smaller than the pressure prediction threshold value of the water injection well, the third step is circulated, wherein the current pressure actual value of the water injection well (2) is obtained by a pressure transmitter (6) or a pressure gauge (5); when the current pressure actual value of the water injection well (2) rises to the pressure prediction threshold value of the water injection well, executing a sixth step;
and step six, alarming and prompting and stopping the operation of the water injection well profile control subsystem: the data analysis processor (19) controls the audible and visual alarm (23) to prompt field constructors to check the working state of the monitoring system, and meanwhile, the data analysis processor (19) controls the filling pump (7) and the accurate metering pump (11) to stop running;
step seven, generating a data report and remotely transmitting the data report: the data analysis processor (19) draws data collected by the radar liquid level meter (9), the pressure transmitter (6) and the electromagnetic flow meter (8) into a curve and generates a data report, and monitoring information reflected by the data report is remotely transmitted on line through the router (25).
2. The method for online monitoring of water shutoff profile control of low permeability reservoirs of claim 1, wherein: the system also comprises a numerical control platform (28), wherein the numerical control platform (28) is communicated with the data analysis processor (19) through a router (25), and the output end of the numerical control platform (28) is connected with a printer.
3. The method for online monitoring of water shutoff profile control of low permeability reservoirs of claim 1, wherein: the public network port (27) is a peanut rod with a peanut shell embedded therein.
4. The method for online monitoring of water shutoff profile control of low permeability reservoirs of claim 1, wherein: the field data acquisition unit (18) comprises a plurality of paths of program-controlled amplification amplifiers and data acquisition cards which are connected with the plurality of paths of program-controlled amplification amplifiers.
5. The method for online monitoring of water shutoff profile control of low permeability reservoirs of claim 4, wherein: the programmable booster amplifier is a programmable gain instrumentation amplifier of the PGA 205.
6. The method for online monitoring of water shutoff profile control of low permeability reservoirs of claim 1, wherein: the video collector (15) is a high-definition camera with an adjustable focal length, and the high-definition camera transmits video images to the data analysis processor (19) through a coaxial video cable.
7. The method for on-line monitoring of water shutoff profile of low permeability reservoir of claim 1, wherein: in the second step, the field data acquisition unit (18) comprises a plurality of paths of program-controlled amplification amplifiers and data acquisition cards which are all connected with the plurality of paths of program-controlled amplification amplifiers, and the field data acquisition unit (18) carries out filtering amplification pretreatment on the pressure value of the water injection well (2); the remote terminal is a mobile phone or a computer.
8. The method for on-line monitoring of water shutoff profile of low permeability reservoir of claim 1, wherein: adopt ultrasonic detector to acquire hyposmosis oil reservoir degree of depth predicted value in advance in the step three, adopt radar level gauge (9) to acquire the liquid level height of profile control agent, set for the liquid level height threshold value of solution tank (10) through data analysis processor (19), when radar level gauge (9) acquire the liquid level height of profile control agent and are less than the liquid level height threshold value of solution tank (10), pump into the profile control agent to solution tank (10) through accurate measuring pump (11), when radar level gauge (9) acquire the liquid level height of profile control agent and be not less than the liquid level height threshold value of solution tank (10), accurate measuring pump (11) are out of work.
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| CN112412407A (en) * | 2019-08-23 | 2021-02-26 | 沈阳中科奥维科技股份有限公司 | Industrial wireless oil production well medicine injection box monitoring equipment |
| CN113175314B (en) * | 2021-06-11 | 2021-12-31 | 牡丹江市井田石油钻采配件有限公司 | Water distributor convenient for observing water injection layer position for water injection well of oil field |
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