WO2018161577A1

WO2018161577A1 - Monitoring and control method utilized in coal reservoir fracking at mining well, device, and monitoring and control apparatus

Info

Publication number: WO2018161577A1
Application number: PCT/CN2017/106622
Authority: WO
Inventors: 黄炳香; 赵兴龙
Original assignee: 中国矿业大学; 徐州佑学矿业科技有限公司
Priority date: 2017-03-07
Filing date: 2017-10-18
Publication date: 2018-09-13
Also published as: CN106884640A; CN106884640B

Abstract

A monitoring and control method utilized in coal reservoir fracking at a mining well, a device, and a monitoring and control apparatus. The method comprises: receiving a configuration of control parameters used to perform hydraulic fracturing on a coal reservoir (1), wherein the control parameters comprise a fluid pressure range, a fluid discharge range, and a sand ratio range; determining whether a value of a first pressure signal of a fluid in a pipe obtained by a pressure sensor (6) is within the fluid pressure range; and if so, adjusting the fluid discharge range and the sand ratio range in the control parameters to adjust a pressure of the fluid in the pipe, until completion of the fracking process. Also provided are a monitoring and control device and monitoring and control apparatus utilized in coal reservoir fracking at a mining well.

Description

Coal mine rock fracture detection and control method, device and measurement and control equipment

Technical field

The invention relates to the field of fracturing technology, in particular to a coal seam rock cracking measurement and control method, device and measuring and controlling device for a mine.

Background technique

At present, the existing high-pressure water injection monitoring equipment for coal seams in China's coal mines can only meet the single monitoring of pressure and flow. It is impossible to control the high-pressure water injection process according to the monitoring data, and the real-time monitoring and monitoring results are not satisfactory. Generally, it is displayed in the form of a dial pointer or after a certain period of time, and then displayed in the form of data. It cannot be displayed in real time on the screen in the form of a curve. It is impossible to visually observe the change trend of water pressure and displacement, and the existing high pressure water injection. Most of the monitoring equipments are manually adjusted by pressure, flow data and manual data parameter adjustment. When the data parameter analysis of high pressure water injection is high, the manual reading of data and adjustment of water injection parameters obviously cannot meet the requirements. Therefore, the existing hydraulic fracturing monitoring equipment of domestic coal mines cannot meet the requirements of real-time display of multi-channel data parameter curves, and it is impossible to record stored data at a higher frequency, and it is impossible to perform real-time automatic control of high-pressure water injection process according to the trend of monitoring data. As a result, many engineering effects can only be judged through later mining engineering and data analysis, so that it has great blindness in engineering construction, which causes many difficulties in monitoring and controlling hydraulic fracturing construction.

Summary of the invention

In view of this, the object of the present invention is to provide a method for measuring and controlling coal seam cracking in a mine, Devices and measurement and control equipment in an effort to resolve or at least alleviate the above problems.

In a first aspect, the solution of the present application provides a coal seam rock cracking measurement and control method for a mine, comprising:

Receiving settings for control parameters for fracturing the coal formation, the control parameters including a fluid pressure range, a fluid displacement range, and a sand ratio range;

Determining whether a first pressure signal value of the fluid line is obtained by the pressure sensor is within the fluid pressure range;

Adjusting the pressure of the fluid line by adjusting the fluid displacement range and the sand ratio range in the control parameter until the pressure is determined that the first pressure signal value is not within the fluid pressure range until pressure The end of the crack.

Optionally, in the method according to the invention, the fluid pressure range comprises a fluid pressure maximum, wherein the determining the first pressure signal value is not within the fluid pressure range by adjusting the control parameter The fluid displacement range and the sand ratio range adjust the pressure of the fluid line until the end of the fracture, including:

Adjusting the high pressure pump by adjusting the fluid displacement range in the control parameter when it is determined that the first pressure signal value is not within the fluid pressure range, and the first pressure signal value is greater than the fluid pressure maximum value Controlling the fluid displacement of the cabinet, adjusting the sand ratio of the sanding device by adjusting the ratio of the sand ratio until the end of the fracturing.

Optionally, in the method according to the present invention, the fluid displacement of the high pressure pump control cabinet is adjusted by adjusting the fluid displacement range in the control parameter, and the sand of the sand adding device is adjusted by adjusting the sand ratio range Ratio until the end of the fracturing, including:

After adjusting the fluid displacement of the high pressure pump control cabinet and the sand ratio of the sanding device, determining whether the second pressure signal value of the fluid pipeline is within the fluid pressure range;

After determining that the second pressure signal value of the fluid line is not within the fluid pressure range, sending an emergency stop signal to the high pressure pump control cabinet, restarting the high pressure pump control cabinet until the fracturing End.

Optionally, in the method according to the present invention, when the determining whether the first pressure signal value of the fluid pipeline is obtained by the pressure sensor is within the fluid pressure range, the method further includes:

Determining whether an abnormality occurs in the fluid line when determining that the first pressure signal value is within the fluid pressure range;

After determining that the abnormality occurs in the fluid pipeline, sending an emergency stop signal to the high pressure pump control cabinet, inspecting the high pressure pump control cabinet, and restarting the high pressure pump control cabinet until the end of the fracturing.

Optionally, in the method according to the present invention, after the receiving the setting of the control parameter for hydraulic fracturing of the coal formation, the method further comprises:

Sending a soft start signal to the high pressure pump control cabinet activates the high pressure pump control cabinet, which is used to output a constant displacement fluid.

In a second aspect, the solution of the present application provides a coal mine rock fracturing measurement and control device for a mine, comprising:

a setting unit for receiving a setting of a control parameter for fracturing the coal formation, the control parameter including a fluid pressure range, a fluid displacement range, and a sand ratio range;

a measuring and controlling unit, configured to determine whether a first pressure signal value of the fluid pipeline obtained by the pressure sensor is within the fluid pressure range;

a processing unit, configured to adjust a pressure of the fluid line by adjusting the fluid displacement range and the sand ratio range in the control parameter when determining that the first pressure signal value is not within the fluid pressure range Make adjustments until the end of the fracturing.

Optionally, in the device according to the invention, the fluid pressure range comprises a fluid pressure maximum, and the processing unit is further configured to:

Optionally, in the device according to the invention, the processing unit is further configured to:

Optionally, in the device according to the present invention, the device further includes: a starting unit, configured to send a soft start signal to the high pressure pump control cabinet to activate the high pressure pump control cabinet, wherein the high pressure pump control cabinet is used for A constant displacement fluid is output.

In a third aspect, the solution of the present application provides a measurement and control device, including the coal rock fracture detection and control device as above.

According to the technical scheme of the invention, the pressure signal values in the fracturing process can be monitored in real time, and the high pressure pump control cabinet is adjusted accordingly according to the control parameters to realize automatic control.

The above described objects, features and advantages of the present invention will become more apparent from the aspects of the appended claims.

DRAWINGS

In order to more clearly illustrate the technical solution of the embodiment of the present invention, the following will be required in the embodiment. The accompanying drawings are to be regarded as inf Other relevant drawings may also be obtained from these drawings without the use of creative labor.

1 is a schematic diagram showing the working principle of a measuring and controlling instrument according to an embodiment of the present invention;

2 is a schematic view showing a framework of an automatic monitoring system for hydraulic fracturing of coal formations according to an embodiment of the present invention;

3 is a flow chart showing a method for measuring and controlling coal rock cracking provided by an embodiment of the present invention;

FIG. 4 is a structural diagram of a coal rock fracture detection and control device according to an embodiment of the present invention.

Icons: 1 - coal rock formation; 2 - drilling; 3 - sealing material; 4 - water injection pipeline; 5 - measuring instrument host; 6 - pressure sensor; 7 - flow sensor; 8 - concentration sensor; 9 - monitoring signal line 10-control line; 11-line stop valve; 12-high pressure pump; 13-high pressure pump control cabinet; 14- comprehensive protection switch; 15-mobile substation.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is a partial embodiment of the invention, and not all of the embodiments. The components of the embodiments of the invention, which are generally described and illustrated in the figures herein, may be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the invention in the claims All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

The invention proposes a fracturing measurement and control method which can be realized by a measuring and controlling instrument. The working principle diagram of the measuring and controlling instrument is shown in Fig. 1. The framework of the automatic monitoring system for hydraulic fracturing of coal rock layers is shown in Fig. 2. Figure 1 As shown, the schematic diagram includes coal rock formation 1, drilling 2, sealing material 3, water injection pipeline 4, measuring instrument host 5, pressure sensor 6, flow sensor 7, concentration sensor 8, monitoring signal line 9, control line 10 , the pipeline shut-off valve 11, the high-pressure pump 12, the high-pressure pump control cabinet 13, the comprehensive protection switch 14, the mobile substation 15, the coal rock formation in the present invention generally refers to the coal rock formation located in the mine. Before the fracturing starts, set the system parameters (measuring and controlling parameters) and water injection parameters through the input buttons on the control panel of the main controller 5 of the measuring instrument, and send the control commands to the control system of the high-pressure pump control cabinet 13 to realize the remote control of the high-pressure pump. Automated control. During the fracturing process, the monitored pressure, flow rate, and concentration signals are transmitted to the internal circuit control system of the main controller 5 through the pressure sensor 6, the flow sensor 7, and the concentration sensor 8 connected in the pipeline, and the internal circuit control system will The received pressure, flow, and concentration signals are processed, and the water pressure, displacement, total flow, and sand ratio curve in the fracturing process are displayed in real time through the display screen of the host 5 of the measuring instrument, and the pressure and the row are simultaneously displayed in the form of numbers. The amount of volume, total flow and sand ratio. By observing the change trend of pressure, displacement, total flow and sand ratio curve, the fracture condition of coal rock layer is grasped in real time, the crack propagation in coal rock layer 1 is judged, and the water injection parameters are adjusted in real time according to the change trend of the curve, and The control information is fed back to the high pressure pump control system, so that the high pressure pump performs corresponding actions to achieve measurement and control of the fracturing process. In addition, the monitored pressure, displacement, total flow rate and sand ratio signal are recorded in real time and stored in the SD card of the host 5 of the measuring instrument, and the monitoring data is subjected to secondary processing by the computer. The instrument can also be used for monitoring and controlling water injection in coal seams. The specific process is as follows.

FIG. 3 is a flow chart showing a coal rock fracture detection and control method according to an embodiment of the present invention. As shown in FIG. 3, the method begins in step S310.

In step S310, a setting is received regarding control parameters for fracturing the coal formation. Among them, the control parameters include a fluid pressure range, a fluid displacement range, and a sand ratio range.

Before the fracturing starts, debug the equipment, connect the communication lines of the pipeline and the monitoring system, pull the warning, set the corresponding control parameters, and send the soft start signal to the high pressure pump control cabinet to start the high pressure pump control cabinet. The high pressure pump control cabinet can be used to control the high pressure pump to output a constant displacement fluid, such as high pressure liquid (such as water, liquid carbon dioxide, liquid nitrogen, etc.), high pressure gas (such as air, Carbon dioxide, nitrogen, etc.) and water and sand mixture. It should be understood, however, that the present invention is not limited by fluids, and all fluids available for fracturing are within the scope of the present invention.

The fluid pressure range is the most important control parameter in the fracturing process. During the fracturing process, the fracturing condition should be judged according to the pressure signal value of the real-time monitoring, and the fracturing control parameters should be adjusted in real time.

On-site fracturing is to control the fracturing with fluid displacement, that is, by injecting fluid into the coal rock layer with constant displacement, the purpose of fracturing the coal rock is achieved. Therefore, monitoring fluid displacement during fracturing is also critical. By connecting the flow sensor in the fracturing pipeline, real-time monitoring of the fluid displacement of the pipeline is realized, and the displacement of the fluid displacement is realized by the value of the displacement signal monitored in real time. For example, the flow sensor in the pipeline can monitor the total amount of fluid injected into the coal formation in real time, and the total flow can be used to estimate the extent of crack propagation in the coal formation. In the coal seam fracturing and extracting coalbed methane and natural gas, in order to improve the conductivity of the crack, it is necessary to add a proppant (mostly quartz sand) to the fracturing fluid to support the cracks that are pressed in the coal rock layer. By inserting a concentration sensor in the pipeline, the sand ratio in the fracturing fluid (ie, the sand concentration in the water sand mixture) can be monitored in real time.

In addition, the control parameters also include the temperature range. When injecting some cryogenic liquids such as liquid CO ₂ and liquid nitrogen into the coal rock fracturing, it is necessary to monitor the temperature changes of the coal seams in the pipeline and the hole wall in real time, by connecting the temperature sensor. Real-time monitoring of temperature is achieved.

In step S320, it is determined whether the first pressure signal value of the fluid line is obtained by the pressure sensor is within the fluid pressure range.

In step S330, when it is determined that the first pressure signal value is not within the fluid pressure range, the pressure of the fluid line is adjusted by adjusting the fluid displacement range and the sand ratio range in the control parameter until the end of the fracture. The first pressure signal value generally refers to a fluid pressure signal value, preferably a hydraulic pressure signal value, which is not limited in the present invention.

The fluid pressure range includes a fluid pressure maximum value and a fluid pressure minimum value. When it is determined that the first pressure signal value is not within the fluid pressure range, the first pressure signal value may be greater than the fluid pressure maximum value, or the first pressure signal may be The value is less than the minimum value of the fluid pressure, below Describe the situation.

When the first pressure signal value is greater than the fluid pressure maximum value, the fluid displacement of the high pressure pump control cabinet is adjusted by adjusting the fluid displacement range in the control parameter, and the sand ratio of the sand adding device is adjusted by adjusting the sand ratio range until the end of the fracturing.

If the fluid displacement of the high pressure pump control cabinet and the sand ratio of the sanding device are adjusted, it is determined whether the second pressure signal value of the fluid line is within the fluid pressure range. After determining that the second pressure signal value of the fluid line is not within the fluid pressure range, sending an emergency stop signal to the high pressure pump control cabinet, manually processing the high pressure pump control cabinet, restarting the high pressure pump control cabinet until fracturing End. The second pressure signal value generally refers to a fluid pressure signal value, preferably a hydraulic pressure signal value, which is not limited in the present invention.

For example, the acquired pressure signal value is transmitted to the tester main unit through a pressure sensor disposed in the fluid line. If the value of the first pressure signal detected during the fracturing process is higher than the set maximum value of the fluid pressure, a control signal is sent to the high pressure pump control cabinet and the sanding device through the main body of the measuring instrument to reduce the pumping displacement or the sand ratio. Thereby reducing the fluid line pressure. The pumping displacement of the high-pressure pump control cabinet is determined by the motor speed. The high-pressure pump motor is equipped with a variable frequency controller, and the speed of the motor is controlled by adjusting the frequency of the frequency converter controller. At the same time, the corresponding control program is added to the main body of the measuring and controlling instrument, and the frequency of the frequency converter can be remotely controlled, thereby controlling the speed of the high-pressure pump motor and realizing the control of the pumping displacement. The sand ratio is controlled by installing a solenoid valve at the outlet of the sanding tank, remotely controlling the opening size of the solenoid valve through the main body of the measuring instrument, and controlling the sanding speed to achieve the purpose of controlling the sand ratio.

If the fluid line pressure is still higher than the fluid pressure maximum after reducing the pump displacement and sand ratio, the emergency stop pump signal is sent to the high pressure pump through the main controller of the measuring instrument, and the reason is analyzed by manual means and corresponding treatment measures are taken to deal with Restart the high pressure pump after completion until the end of the fracturing.

When the first pressure signal value is less than the minimum value of the fluid pressure, it may be caused by water leakage in the fluid pipeline. At this time, it is considered that the fracturing is invalid, and the pump stop signal is sent to the high pressure pump control cabinet, and the inspection is performed by the staff. Start the high pressure pump control cabinet until the end of the fracturing.

In an embodiment, when it is determined that the first pressure signal value is within the fluid pressure range, determining whether an abnormal condition occurs in the fluid pipeline; after determining that the fluid pipeline is abnormal, sending an emergency stop signal to the high pressure pump control cabinet, Repair the high pressure pump control cabinet and restart the high pressure pump control cabinet until the end of the fracturing.

For example, if the line pressure is within the normal range, the high pressure pump will continue to work until the fracturing is completed, the main controller of the measuring instrument sends a soft stop signal to the high pressure pump control cabinet, and the soft stop control button switch of the high pressure pump control cabinet is controlled to achieve high pressure. The remote soft stop of the pump enables the pressure in the pipeline to be slowly and smoothly reduced, so as to avoid the fracturing pipeline from being flushed out of the hole due to sudden pump stoppage. If there is an emergency such as water leakage in the fracturing process, the main engine of the measuring instrument will send an emergency stop signal to the high-pressure pump control cabinet, and the pump will be stopped urgently. After careful inspection and confirmation, the pump will be re-opened.

In an embodiment, in the actual application, when the pressure measurement starts, the project button is created by the display interface of the tester host, and the tester host automatically creates a project folder named after the work surface name to store the Engineering data and data information. After setting the control parameters and engineering background, click the “Coal Rock Parameters” tab to enter the coal rock layer parameter input interface. The entry of coal seam parameters is based on the comprehensive histogram of the mine, which is entered from top to bottom. First, enter the top plate parameters, click on the "Add Layer" button, it will automatically identify the parameters entered in the top, coal or bottom; then, fill in the corresponding table, and clear the contents of the parameter input text box, in order to enter a new data. Among them, the "delete layer" button will delete the selected layer in the table. After the entry is completed, if the data is found to be incorrect, you can directly click the corresponding cell in the table to modify it. After the parameters are accurately entered, click the “Save” button to save the coal formation parameters to the project folder.

After setting the parameters of the coal formation, click on the “Pump station, drilling and piping layout” tab to set the external conditions for the hydraulic fracturing construction.

In the drilling arrangement, according to the experience of hydraulic fracturing in coal mines, two types of drilling can meet the needs. For example, during the user's use, select the “S1 Drilling” check box and the “S2” Drilling check box to determine if it is selected. "Slotting" and "Hydraulic slitting" settings, based on The specific process of hydraulic fracturing is selected, and if not required, neither can be used. The length in the "high pressure pipe", "mounting rod", and "anti-impact" parameters in "Pipeline Arrangement" is the overall length of the borehole during the hydraulic fracturing process. The number of "three-way" in the "pipe arrangement" can be determined according to the number of pipes injected by high-pressure water. For example, if there are two injection pipes, the number of three-way pipes is one, where the local friction calculation is performed. According to the local friction of the three-way calculation, the number of injection pipes is one, and the number of three-way is 0. At this time, the local friction calculation is calculated according to the local friction at the common pipe connection.

After the data input is completed, click the “Save” button to calculate, and obtain the relationship between the friction and the displacement along the path, and save the input data and the friction and displacement relationship to the project folder. Click "Run" to perform the simulation calculation. After the calculation is completed, click the "Save" button to save the input data and calculation results to the project folder.

The invention further comprises an analysis system, wherein the analysis system is provided with a ground stress estimation module, which can automatically analyze the rock fracture pressure, the re-tension pressure and the closing pressure in the hydraulic fracturing process according to the construction water pressure curve, combined with the fracture The pressure and the tension pressure further analyze the magnitude of the ground stress. Among them, the method of determining the closing pressure includes a single tangent method, a Mascat method, a dp/dt method, a dt/dp method, etc., and the analysis system can select a suitable closing pressure determination method to judge the closing pressure according to the characteristics of each water pressure curve. Make sure that the pressure identification is off and accurate. After the construction is completed, click the “Start Recognition” button to identify the burst pressure, identify the closing (closed) pressure, and calculate the ground stress, and save the data to the project folder.

When the coal seam with coal and gas outburst or impact tendency is fractured, there is a place where the pressure is relieved, and accordingly, there is a stress increase zone, and local stress concentration is prevented from occurring, which causes a power disaster. According to the lithology of coal seams, the degree of protrusion or impact tendency, and the influence of parameters such as displacement and cracking time of hydraulic fracturing pump on the degree of stress disturbance of coal and rock layers, reasonable design of pump displacement and pumping time During the period of cracking, according to the monitored microseismic signals of coal seams, the pump displacement and time are adjusted in real time to achieve the purpose of effectively preventing coal and gas outburst, impact rock pressure and other dynamic disasters.

The monitored pressure signal value and fluid displacement signal value will be displayed in real time in the form of a curve. On the screen. The pressure, displacement, and accumulated flow data are displayed in real time on the upper part of the display, and are refreshed to the display in synchronization with the curve at the set time interval. The center of the display is the real-time curve display area, the horizontal axis is time, and the monitoring time range displayed on the horizontal axis can be adjusted through the button panel as needed. There are three display intervals: 0~120s, 0~10min, 0~30min, which is convenient. The monitoring curve performs local amplification and the overall trend of the observation curve; the main vertical axis shows the pressure monitoring value, the pressure monitoring range is: 0-60 MPa; the secondary vertical axis shows the instantaneous displacement, and the displacement monitoring range is: 0 to 300 L/min. The real-time display function of the monitoring data allows the operator to visually observe the change trend of the water injection parameters during the high-pressure water injection process, and facilitates timely adjustment of the water injection parameters according to the monitoring curve. Real-time monitoring shows the multi-channel curve of pressure and flow, and during operation, the corresponding parameter settings can be changed through the keyboard to meet the requirements of the real-time data collected in the high-pressure water injection process according to the corresponding parameter settings.

In addition, the invention also discloses a measuring and controlling device. The main body casing of the measuring and controlling device has beautiful appearance design, light weight, small volume, convenient carrying, and can work stably for a long time in a harsh environment such as a coal mine. At the same time, the measurement and control equipment has automatic monitoring and control, over-limit protection and alarm functions. The fracturing process can be controlled in real time based on the monitoring data to ensure the safe and effective completion of the construction.

FIG. 4 is a structural diagram of a coal rock fracture detection and control device according to an embodiment of the invention. As shown in FIG. 4, the apparatus includes: a setting unit 410, a measurement and control unit 420, a processing unit 430, and a starting unit 440.

The setting unit 410 is configured to receive settings regarding control parameters for fracturing the coal formation, the control parameters including a fluid pressure range, a fluid displacement range, and a sand ratio range.

After the above control parameters are set, the starting unit 440 is configured to send a soft start signal to the high pressure pump control cabinet to start the high pressure pump control cabinet, and the high pressure pump control cabinet is used to output a constant displacement fluid.

The measurement and control unit 420 is configured to determine a first pressure letter for acquiring a fluid pipeline through the pressure sensor Whether the value is within the fluid pressure range.

The processing unit 430 is configured to adjust the pressure of the fluid line by adjusting the fluid displacement range and the sand ratio range in the control parameter when determining that the first pressure signal value is not within the fluid pressure range Make adjustments until the end of the fracturing.

Optionally, the fluid pressure range includes a fluid pressure maximum, and the processing unit 430 is further configured to determine that the first pressure signal value is not within the fluid pressure range, and the first pressure signal value is greater than When the fluid pressure is maximum, adjusting the fluid displacement of the high pressure pump control cabinet by adjusting the fluid displacement range in the control parameter, adjusting the sand ratio of the sanding device by adjusting the sand ratio range until the fracturing End.

Optionally, the processing unit 430 is further configured to determine, after adjusting the fluid displacement of the high pressure pump control cabinet and the sand ratio of the sanding device, whether the second pressure signal value of the fluid pipeline is in the Within the range of fluid pressure; after determining that the second pressure signal value of the fluid line is not within the fluid pressure range, sending an emergency stop signal to the high pressure pump control cabinet, restarting the high pressure pump control cabinet, Until the end of the fracturing.

Optionally, the processing unit 430 is further configured to determine whether an abnormal condition occurs in the fluid pipeline when determining that the first pressure signal value is within the fluid pressure range; determining that the abnormality occurs in the fluid pipeline After the situation, an emergency stop signal is sent to the high pressure pump control cabinet, the high pressure pump control cabinet is overhauled, and the high pressure pump control cabinet is restarted until the fracturing ends.

In the description provided herein, numerous specific details are set forth. However, it is understood that the embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques are not shown in detail so as not to obscure the understanding of the description.

Similarly, the various features of the invention are sometimes grouped together into a single embodiment, in the above description of the exemplary embodiments of the invention, Figure, or a description of it. However, the method disclosed is not to be interpreted as reflecting the intention that the claimed invention requires more features than those recited in the claims. More precisely, as in the following claims As reflected in the book, the inventive aspects are less than all of the features of the single embodiment disclosed above. Therefore, the claims following the specific embodiments are hereby explicitly incorporated into the embodiments, and each of the claims as a separate embodiment of the invention.

Those skilled in the art will appreciate that the modules or units or components of the devices in the examples disclosed herein may be arranged in a device as described in this embodiment, or alternatively may be positioned differently than the devices in this example. In one or more devices. The modules in the foregoing examples may be combined into one module or may be further divided into a plurality of sub-modules.

Those skilled in the art will appreciate that the modules in the devices of the embodiments can be adaptively changed and placed in one or more devices different from the embodiment. The modules or units or components of the embodiments may be combined into one module or unit or component, and further they may be divided into a plurality of sub-modules or sub-units or sub-components. In addition to such features and/or at least some of the processes or units being mutually exclusive, any combination of the features disclosed in the specification, including the accompanying claims, the abstract and the drawings, and any methods so disclosed, or All processes or units of the device are combined. Each feature disclosed in this specification (including the accompanying claims, the abstract and the drawings) may be replaced by alternative features that provide the same, equivalent or similar purpose.

In addition, those skilled in the art will appreciate that, although some embodiments described herein include certain features that are included in other embodiments and not in other features, combinations of features of different embodiments are intended to be within the scope of the present invention. Different embodiments are formed and formed. For example, in the following claims, any one of the claimed embodiments can be used in any combination.

Furthermore, some of the described embodiments are described herein as a combination of methods or method elements that can be implemented by a processor of a computer system or by other means for performing the functions. Accordingly, a processor having the necessary instructions for implementing the method or method elements forms a means for implementing the method or method elements. Furthermore, the elements described herein of the device embodiments are examples of means for performing the functions performed by the elements for the purpose of carrying out the invention.

As used herein, the use of the ordinal "first", "second", "third", etc., to describe a generic object merely means a different instance referring to a similar object, and is not intended to imply such The objects being described must have a given order in time, space, ordering, or in any other way.

While the present invention has been described in terms of a limited number of embodiments, it will be understood by those skilled in the art that In addition, it should be noted that the language used in the specification has been selected primarily for the purpose of readability and teaching, and is not intended to be interpreted or limited. Therefore, many modifications and changes will be apparent to those skilled in the art without departing from the scope of the invention. The disclosure of the present invention is intended to be illustrative, and not restrictive, and the scope of the invention is defined by the appended claims.

Claims

A coal mine rock fracturing measurement and control method for mines, characterized in that it comprises:

Receiving settings for control parameters for hydraulic fracturing of the coal formation, the control parameters including a fluid pressure range, a fluid displacement range, and a sand ratio range;

Determining whether a first pressure signal value of the fluid line is obtained by the pressure sensor is within the fluid pressure range;

Adjusting the pressure of the fluid line by adjusting the fluid displacement range and the sand ratio range in the control parameter until the pressure is determined that the first pressure signal value is not within the fluid pressure range until pressure The end of the crack.
The method of claim 1 wherein said fluid pressure range comprises a fluid pressure maximum, said adjusting said control parameter when said determining said first pressure signal value is not within said fluid pressure range The fluid displacement range and the sand ratio range adjust the pressure of the fluid line until the end of the fracture, including:

Adjusting the high pressure pump by adjusting the fluid displacement range in the control parameter when it is determined that the first pressure signal value is not within the fluid pressure range, and the first pressure signal value is greater than the fluid pressure maximum value Controlling the fluid displacement of the cabinet, adjusting the sand ratio of the sanding device by adjusting the ratio of the sand ratio until the end of the fracturing.
The method according to claim 2, wherein said adjusting a fluid displacement of said high pressure pump control cabinet by adjusting said fluid displacement range of said control parameter, adjusting said sand ratio by adjusting said ratio of said sand ratio Sand ratio until the end of the fracturing, including:

After adjusting the fluid displacement of the high pressure pump control cabinet and the sand ratio of the sanding device, determining whether the second pressure signal value of the fluid pipeline is within the fluid pressure range;

After determining that the second pressure signal value of the fluid line is not within the fluid pressure range, sending an emergency stop signal to the high pressure pump control cabinet to restart the high pressure pump control cabinet, Until the end of the fracturing.
The method of claim 1, wherein when the determining whether the first pressure signal value of the fluid line is obtained by the pressure sensor is within the fluid pressure range, the method further comprises:

Determining whether an abnormality occurs in the fluid line when determining that the first pressure signal value is within the fluid pressure range;

After determining that the abnormality occurs in the fluid pipeline, sending an emergency stop signal to the high pressure pump control cabinet, inspecting the high pressure pump control cabinet, and restarting the high pressure pump control cabinet until the end of the fracturing.
The method of claim 1 further comprising, after said receiving said setting of control parameters for hydraulic fracturing of the coal formation, further comprising:

Sending a soft start signal to the high pressure pump control cabinet activates the high pressure pump control cabinet, which is used to output a constant displacement fluid.
A coal mine rock fracturing measurement and control device for mines, characterized in that it comprises:

a setting unit for receiving a setting of a control parameter regarding hydraulic fracturing of the coal formation, the control parameter including a fluid pressure range, a fluid displacement range, and a sand ratio range;

a measuring and controlling unit, configured to determine whether a first pressure signal value of the fluid pipeline obtained by the pressure sensor is within the fluid pressure range;

a processing unit, configured to adjust a pressure of the fluid line by adjusting the fluid displacement range and the sand ratio range in the control parameter when determining that the first pressure signal value is not within the fluid pressure range Make adjustments until the end of the fracturing.
The apparatus of claim 6 wherein said fluid pressure range comprises a fluid pressure maximum, said processing unit further comprising:

When it is determined that the first pressure signal value is not within the fluid pressure range, and the first pressure signal value is greater than the fluid pressure maximum value, by adjusting the control parameter The fluid displacement range adjusts the fluid displacement of the high pressure pump control cabinet, and the sand ratio of the sanding device is adjusted by adjusting the sand ratio range until the fracturing ends.
The device according to claim 7, wherein the processing unit is further configured to:

After adjusting the fluid displacement of the high pressure pump control cabinet and the sand ratio of the sanding device, determining whether the second pressure signal value of the fluid pipeline is within the fluid pressure range;

After determining that the second pressure signal value of the fluid line is not within the fluid pressure range, sending an emergency stop signal to the high pressure pump control cabinet, restarting the high pressure pump control cabinet until the fracturing End.
The device according to claim 6, wherein the processing unit is further configured to:

Determining whether an abnormality occurs in the fluid line when determining that the first pressure signal value is within the fluid pressure range;

After determining that the abnormality occurs in the fluid pipeline, sending an emergency stop signal to the high pressure pump control cabinet, inspecting the high pressure pump control cabinet, and restarting the high pressure pump control cabinet until the end of the fracturing.
The device according to claim 6, further comprising: a starting unit, wherein the starting unit is configured to send a soft start signal to the high pressure pump control cabinet to activate the high pressure pump control cabinet, and the high pressure pump control cabinet For outputting a constant displacement fluid.
A measurement and control device, comprising the coal rock fracture detection and control device according to any one of claims 6-10.