CN106354179A - A remote monitoring system for coal seam injection liquid CO2 fracturing enhancement - Google Patents

Abstract

The invention provides a remote monitoring system for fracture anti-reflection of liquid state CO2 injected to coal seam. The system is capable of reducing the difficulty of the operations, such as data collection, monitoring and controlling, of a worker during the fracture anti-reflection construction, and improving the safety and working efficiency of the worker. The system comprises a fracture anti-reflection pump system, an underground remote control system, an online monitoring system and an underground base station. The fracture anti-reflection pump system is installed in the underground construction area. The underground remote control system is installed in an underground power distribution cabinet. The online monitoring system comprises a high definition infrared video camera, a pressure sensor, a temperature sensor and a flow sensor. The online monitoring system is capable of uniformly realizing the ground video monitoring of the underground fracture anti-reflection process, the collection and storage of the corresponding parameters and the display of a parameter curve image. The underground base station comprises a mine interchanger, an alarm, and a communication information processor. The underground base station is capable of analyzing and transmitting the signal during the work of the fracture anti-reflection pump system, and providing the signal support for the underground remote control and online monitoring systems.

Description

A remote monitoring system for coal seam injection liquid CO2 fracturing enhancement

technical field

The invention relates to a remote monitoring system, in particular to a remote control system for the ground of a fracturing anti-reflection pump used for liquid _CO2 fracturing in coal mines.

Background technique

my country's coal mines mainly use underground mining. On the one hand, due to the harsh underground environment and other factors, it is difficult to carry out fracturing and anti-permeability construction. It is more difficult for the staff of anti-reflection construction to collect data, monitor and control, etc., thus reducing work efficiency. On the other hand, frequent underground trips are prone to fatigue, which may cause problems for the safety of the staff.

Contents of the invention

In order to solve the problems of difficult construction control, data collection and monitoring, low work efficiency and low safety, the present invention provides a remote monitoring system for coal seam injection liquid CO ₂ fracturing anti-permeability, the system reduces fracturing It increases the difficulty of staff in data collection, monitoring and control during construction, and improves the safety and work efficiency of staff.

Technical scheme of the present invention is as follows:

A remote monitoring system for liquid CO ₂ fracturing enhancement in coal seams, the system includes a fracturing enhancement pump system, an underground remote control system, an online monitoring system, and an underground base station. The fracturing anti-permeability pump system is installed in the underground construction area; the downhole remote control system is installed in the downhole power distribution cabinet to realize the control of the start and stop of the device during the underground fracturing and anti-permeability process, as well as the pressure, Display and control of relevant parameters such as temperature and flow; the online monitoring system includes high-definition infrared cameras, pressure sensors, temperature sensors and flow sensors. Real-time monitoring of downhole working conditions. Pressure sensors, temperature sensors and flow sensors are installed in the coal seam group in the construction area. The online monitoring system as a whole realizes the video monitoring of the ground during the underground fracturing anti-permeability process and the collection and storage of corresponding parameters and parameter curve images. display. The underground base station includes a mining switch, an alarm, and a communication information processor, which realizes the analysis and transmission of signals when the fracturing anti-reflection pump system is working, and provides signal support for the underground remote control and online monitoring system.

The pressure sensor, temperature sensor and flow sensor transmit the change of pressure, temperature and liquid _CO2 flow rate of the coal seam in the process of fracturing and anti-permeability to the underground base station in the form of electrical signals, and convert them into corresponding electrical signals through the mine switch and network signals are transmitted to the downhole remote control system and online monitoring system.

The fracturing anti-reflection pump system, the downhole remote control system, the online monitoring system and the downhole base station are connected through the downhole industrial ring network.

The fracturing anti-reflection pump system includes a fracturing anti-reflection pump and a motor.

The downhole remote control system includes a control switch, a temperature controller, a pressure controller and a flow control device.

The online monitoring system includes data acquisition and storage interface, video online monitoring interface, multi-parameter variable image display interface, wireless routing and remote server. The online monitoring system is connected with pipelines and equipment pressure gauges, flow meters, thermocouples, pressure transmitters, etc. in the fracturing construction area through optical fiber, RS485 bus or Ethernet to realize online collection and storage of data with different resolutions. At the same time, the monitoring data can be connected with the ground control center to realize online monitoring.

The fracturing anti-reflection pump system and the underground remote control system are connected to the cable end of the underground base station with mining cables, and the online monitoring system is connected to the underground base station with mining optical fibers.

The fracturing anti-reflection pump system, the underground remote control system, and the online monitoring system are connected with the underground base station as a hub. The mine switch in the underground base station converts the electrical signal output from the underground into a corresponding network signal, which is transmitted through the communication information processor. It is transmitted to the online monitoring system to realize data collection, storage and image display on the ground; the electrical signal output from the underground is shunted by the mine switch to the communication information processor, and then the electrical signal is transmitted to the underground remote control system to realize the underground fracturing work. Remote control; the network signal converted by the mine switch is transmitted to the ground monitoring and monitoring system by the mine optical fiber signal carrier after passing through the communication information processor, so as to realize the visual remote monitoring of the ground; fracturing anti-reflection pump system, underground remote control system, online The monitoring system and the downhole base station are connected through the downhole industrial ring network, and jointly constitute a remote monitoring system for coal seam liquid CO ₂ fracturing enhancement. The downhole remote control system transmits remote signals to the fracturing anti-reflection pumps of hundreds to thousands of meters through the signal transmission system or the downhole industrial ring network to realize manual control of construction design parameters. The three major systems realize ground Monitoring and monitoring of downhole work and downhole remote control.

The beneficial effects of the present invention are: to realize the remote monitoring and monitoring of the downhole fracturing and anti-permeability work by the ground studio and the downhole remote control, which not only reduces the workload, but also greatly reduces the time for the staff to go back and forth underground, and reduces the fracturing increase rate. The difficulty of data collection, monitoring and control during construction can be fully understood, thereby improving the overall efficiency of construction and the safety of construction personnel.

Description of drawings

Fig. 1 is the schematic diagram of the remote monitoring system of the embodiment of the present invention;

Fig. 2 is a partial schematic diagram of the fracturing antireflection pump system according to the embodiment of the present invention;

Fig. 3 is a partial schematic diagram of the downhole remote control system according to the embodiment of the present invention;

Fig. 4 is a partial schematic diagram of an online monitoring system according to an embodiment of the present invention.

Reference signs: 1-fracturing anti-reflection pump system, 2-downhole remote control system, 3-online monitoring system, 4-fracturing anti-reflection pump, 5-mine explosion-proof motor, 6-mine intrinsically safe high-definition infrared Camera, 7-underground base station, 8-mining switch, 9-alarm, 10-communication information processor, 11-wireless router, 12-remote server, 13-data collection and storage interface, 14-video online monitoring interface , 15-multi-parameter variable image display interface, 16-control switch, 17-temperature controller, 18-pressure controller, 19-flow control device, 20-pressure sensor, 21-temperature sensor, 22-flow sensor, 23- Mining cable, 24-mining optical fiber

detailed description

Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:

As shown in Figure 1, a remote monitoring system for coal seam injection liquid CO ₂ fracturing anti-permeation, including fracturing anti-permeation pump system 1, downhole remote control system 2 and online monitoring system 3, also includes an underground base station 7 .

The fracturing anti-reflection pump system 1 includes a fracturing anti-reflection pump 4 and a mining explosion-proof motor 5 . As shown in Figure 2, the fracturing anti-reflection pump 4 is installed in an explosion-proof cabinet in a relatively flat area of the underground working face. The fracturing anti-reflection pump 4 is preferably a mining low-temperature, high-pressure delivery fracturing anti-reflection pump, and the number is two , one of which is reserved as a spare, and the liquid CO ₂ is transported by the gas-liquid separator, wherein the inlet and outlet of the liquid CO ₂ delivery pipeline are provided with mining safety valves and discharge valves connected with the fracturing anti-reflection pump 4; the fracturing anti-reflection The pump motor is an explosion-proof three-phase asynchronous motor specially used for coal mines, which has the performance of explosion-proof and explosion-proof;

Further, the operating temperature range of the fracturing anti-reflection pump 4 is -50°C-+60°C, and the operating temperature of the fracturing anti-reflection pump 4 is displayed by a digital temperature sensor; the pressure range is 0MPa-100.0MPa, and the pressure range of the fracturing pump can be Adjustment, the displacement is 1.0-2.5m3/min.

As shown in FIG. 3 , the downhole remote control system 2 includes a control switch 16 , a temperature controller 17 , a pressure controller 18 and a flow control device 19 . The downhole remote control system 2 is set at a position several hundred to several thousand meters away from the working face, and is fixedly installed in the downhole special power distribution cabinet to realize precise control of the start and stop of the fracturing pump during the fracturing enhancement process, As well as the display and remote control of relevant parameters such as pressure, temperature and flow in the fracturing process. The control switch 16, the temperature controller 17, the pressure controller 18 and the flow control device 19 are fixedly installed on the corresponding panel in the control system.

Further, the control switch 16 is connected through the mine cable module end, and uses electric signals to control the work of the fracturing anti-reflection pump system 1; the control switch 16 is a series of high-voltage vacuum circuit breakers for mineral processing, with two buttons on and off, and the circuit breaker There are three channels on the breaker switch box, and the signal transmission cable end is connected to the high-voltage vacuum circuit breaker in a modular form.

Further, the temperature controller 17 adopts a conventional electronic digital temperature sensor device, the temperature display range is -50°C to +60°C, and the display accuracy is ±0.1°C. The temperature controller 17 has two channels (that is, the underground temperature signal input channel and the surface Signal output channel), the display mode of temperature signal is three-digit LED digital tube display.

Further, the pressure controller 18 adopts a high-precision digital pressure sensor, and the set value of the controller is adjustable, and the range range of 0-100 MPa can be selected arbitrarily. The pressure controller 18 shell is provided with a dedicated pressure input module (programmable chip), and a single-chip microcomputer-driven LED digital display module is arranged to display the digitized pressure value of the working place, and then adjusted to the actual required pressure value according to the display; the pressure controller 18 is The two channels are respectively the actual pressure signal input channel of the fracturing anti-reflection pump system 1 and the pressure controller 18 adjustment pressure signal output channel.

Furthermore, the flow control device 19 selects a mine-used series vortex flowmeter, which is integrally connected with a special flow sensor to realize flow adjustment and display. The flow control device 19 sets the flow value through the mining series vortex flowmeter according to the liquid CO ₂ flow value required by the downhole fracturing anti-permeability pump system 1, and can display the flow rate through a dedicated flow sensor.

As shown in Figure 4, the online monitoring system 3 includes a mining intrinsically safe high-definition infrared camera 6, a pressure sensor 20, a temperature sensor 21 and a flow sensor 22. In a large fracturing construction area, it is possible to record in real time various situations of the fracturing anti-reflection pump system 1 working underground, and the video shows the operation of the fracturing anti-reflection pump 4 and the situation of the anti-permeability coal seam working face, so as to realize the fracturing anti-reflection pump system 1 Real-time monitoring of the downhole working conditions of the permeable pump 4. The signal output ports of the pressure sensor 20, the temperature sensor 21 and the flow sensor 22 are connected to the underground base station 7 through several hundred to several thousand meters of mine cables 23, and the pressure, temperature, and liquid CO injection during the fracturing and anti-permeability process of the coal seam are monitored. ₂ The change of the flow is transmitted to the underground base station 7 in the form of electrical signals, which are converted into corresponding electrical signals and network signals by the mining switch 8 and then transmitted to the underground remote control system 2 and the online monitoring system 3.

The online monitoring system 3 also includes a data collection and storage interface 13 , a video online monitoring interface 14 , a multi-parameter variable image display interface 15 , a wireless router 11 and a remote server 12 . The online monitoring system is installed in the ground studio, and its function is to automatically collect and store the corresponding parameters transmitted during the downhole fracturing and anti-permeability process, and to represent the changes of parameters such as pressure and temperature over time in the form of images , the overall realization of the ground video monitoring of the downhole fracturing anti-permeability process, the collection and storage of corresponding parameters, and the display of parameter curve images. The online monitoring system 3 is connected with pipelines and equipment pressure gauges, flow meters, thermocouples, pressure transmitters, etc. in the fracturing construction area through optical fiber, RS485 bus or Ethernet, to realize online collection and storage of data with different resolutions , At the same time, the monitoring data can be connected with the ground control center to realize online monitoring.

Further, the data collection and storage interface 13 adopts general-purpose data collection and storage software installed on the computer, and inputs relevant parameters such as pressure and temperature during the fracturing process of the fracturing anti-reflection pump system 1 into the underground base station 7, and then passes through the mine after conversion. The remote server 12 is input through an optical fiber 24, and the information is processed by the server and transmitted to the data collection and storage software to realize data collection and storage.

Further, the online video monitoring interface 14 mainly performs real-time monitoring on the state of the fracturing pump and the working condition of the underground fracturing anti-reflection area by installing a mine-used intrinsically safe high-definition infrared camera 6 in an area with a large underground video monitoring range. The ground video online monitoring part is equipped with video display software matched with the mining intrinsically safe high-definition infrared camera 6 to display the working status of the downhole fracturing anti-reflection pump system 1 and the working conditions of the downhole fracturing anti-reflection area in real time.

Further, the multi-parameter variable image display interface 15 is mainly to install multi-parameter acquisition software in the computer to record the pressure, temperature, flow change process and directly display the pressure-time, temperature-time, flow-time curves and display the corresponding images. It is automatically saved to pave the way for subsequent data analysis, and the interface is divided into an alarm display interface, which mainly monitors the working status of the fracturing pump area and the injection liquid CO ₂ construction area, so as to display the ground alarm for downhole monitoring.

The underground base station 7 includes a mine switch 8 , an alarm 9 and a communication information processor 10 . The downhole base station 7 implements signal analysis and transmission of the downhole fracturing anti-reflection pump 4 when it is working, and provides signal support for the downhole remote control and online monitoring system 3 .

Further, the main function of the alarm 9 is to send out an alarm signal in time when the fracturing anti-permeation pump system 1 fails; An alarm signal is sent so that the downhole remote control system 2 can handle it.

The fracturing anti-reflection pump system 1, the downhole remote control system 2, and the online monitoring system 3 are connected with the downhole base station 7 as a hub, and the mine switch 8 in the downhole base station 7 converts the electrical signals output from the downhole into corresponding network signals Through the communication information processor, it is transmitted to the online monitoring system 3 to realize data collection, storage and image display on the ground; the mine switch 8 divides the electrical signal output from the underground to the communication information processor, and then transmits the electrical signal to the underground remote control system 2. Realize the remote control of underground fracturing work; the network signal converted by the mining switch 8 is transmitted to the ground monitoring and monitoring system by the mine optical fiber 24 signal carrier after passing through the communication information processor, so as to realize the visual remote monitoring of the ground; The permeable pump system 1, the downhole remote control system 2, the online monitoring system 3 and the downhole base station 7 are connected through the downhole industrial ring network, and jointly constitute a remote monitoring system for coal seam liquid CO ₂ fracturing anti-permeation. The downhole remote control system 2 performs remote signal transmission to the fracturing anti-reflection pump 4 of hundreds to several kilometers through the signal transmission system or the downhole industrial ring network to realize manual control of construction design parameters. The ground monitoring and monitoring of downhole work and downhole remote control.

When the system is performing liquid CO ₂ fracturing and anti-permeability work, firstly, special personnel should be assigned to check whether the downhole system, downhole remote control system 2 and online monitoring system 3 are in normal working condition. After inspection, the overall system is in normal condition Downhole fracturing and anti-permeability work can be carried out immediately. Specifically, firstly, after the vacuum circuit breaker switch in the downhole remote control system ₂ issues a work command to the fracturing anti-reflection pump system 1, the fracturing anti-reflection pump system 1 is started to work; , the special sensor installed in the fracturing anti-reflection pump 4 can transmit the basic parameters in the fracturing process to the underground base station 7 in the form of electrical signals through the mine cable 23, and then send the signal through the mine switch 8 in the underground base station 7. After conversion, they are transmitted to the downhole remote control system 2 and online monitoring system 3 respectively in the form of electrical signals and network signals. When the downhole remote control system 2 and online monitoring system 3 receive the data signals, the downhole remote control system 2 will display them in real time The data is convenient for mastering the basic parameters of the anti-reflection area in underground construction; the online monitoring system 3 automatically saves the multi-parameters, and displays the collected data in the form of images according to the parameter changes, so as to provide anti-reflection for subsequent fracturing The working condition analysis in the process provides the basis.

The underground fracturing anti-reflection pump system 1 and the underground remote control system 2 are connected to the cable end of the underground base station 7 using a mining cable 23; the online monitoring system 3 is connected to the underground base station 7 using a mining optical fiber 24; the mining cable 23 and optical fiber together realize the signal transmission between the underground and the ground, providing guarantee for the remote control of underground fracturing anti-reflection and ground monitoring.

Claims (5)

1. one kind is used for coal seam fluid injection state co₂Long distance control system that pressure break is anti-reflection it is characterised in that: include pressure break anti-reflection pump system System, down-hole tele-control system, online monitoring system, also include down-hole base station；Pressure break is anti-reflection, and pumping system is installed on down-hole applies Work area domain；Down-hole tele-control system is arranged in the power distribution cabinet of down-hole, realizes the startup to underground fracture device during anti-reflection With the control stopping, and to the pressure in fracturing process, temperature, the display of flow and regulation and control；Online monitoring system includes height Clear infrared video camera, pressure transducer, temperature sensor and flow transducer, high definition video camera is arranged at downhole monitoring model Enclose larger construction area, pressure transducer, temperature sensor and flow transducer are arranged in the coal seam group of construction area, Line monitoring system integrally realizes the video monitoring on underground fracture anti-reflection process ground and the collection of relevant parameter, storage and parameter are bent The display of line image；Down-hole base station includes mining switch, siren, communications message processor, realizes the anti-reflection pumping system of pressure break The analysis of signal and transmission during work, are down-hole remotely control and online monitoring system provides signal to support；

Pressure break is anti-reflection pumping system, down-hole tele-control system, online monitoring system and down-hole base station are by down-hole industry looped network phase Even.

2. according to claim 1 for coal seam fluid injection state co₂Long distance control system that pressure break is anti-reflection it is characterised in that: pressure Split anti-reflection pumping system and include the anti-reflection pump of pressure break and motor.

3. according to claim 1 for coal seam fluid injection state co₂Long distance control system that pressure break is anti-reflection it is characterised in that: well Lower tele-control system includes controlling switch, temperature controller, pressure controller and volume control device.

4. according to claim 1 for coal seam fluid injection state co₂Long distance control system that pressure break is anti-reflection it is characterised in that: Line monitoring system also includes Data acquisition and storage interface, video on-line monitoring interface, multiple parameter variables image display interfaces, no Circuit by and remote server.

5. according to Claims 1-4 arbitrary described for coal seam fluid injection state co₂The long distance control system that pressure break is anti-reflection, its feature It is: pressure break is anti-reflection pumping system and down-hole tele-control system are connected with down-hole base station cable end using mining cable, online supervise It is connected using mine optical fiber between control system and down-hole base station.