Electromagnetic induction water injection water drive monitoring device

Abstract

The electromagnetic induction water injection water drive monitoring device comprises a sending system and at least one receiving system, the sending system comprises a first control unit, a power supply unit, an IGBT inversion driving unit and a signal output interface unit, and the output end of the power supply unit is connected with the input end of the IGBT inversion driving unit; the output end of the IGBT inversion driving unit is connected with the signal output interface unit, and the output end of the first control unit is connected with the control end of the power supply unit so as to control the power supply unit to output a DC signal. The output end of the first control unit is connected with the control end of the IGBT inversion driving unit so as to control the IGBT inversion driving unit to invert the direct current signal into a time domain induced polarization waveform signal or a dual-frequency induced polarization waveform, and the interface unit is connected with the ground so as to be used for outputting the time domain induced polarization waveform signal or the dual-frequency induced polarization waveform signal to the ground. The receiving system is used for receiving the electromagnetic induction signal.

Description

Technical Field

[0001] The present application relates to the technical field of natural resource and energy exploration, and in particular to an electromagnetic induction water injection and water drive monitoring device. Background Art

[0002] Water injection development is the most commonly used oil and gas development method at home and abroad. It plays a significant role in improving oil and gas recovery rates and is currently widely used in domestic oil and gas development. However, after a long period of water injection development, the water content of the formation increases significantly, which reduces the oil and gas recovery rate and has a great impact on the development and utilization of oil and gas fields. In addition, most domestic oil fields have entered the high water content development stage. To improve the oil and gas recovery rate, it is necessary to optimize and adjust the water injection method. Therefore, it is necessary to clarify the effective direction of water injection, delineate the water injection front, evaluate the water injection effect and use this to guide the optimization and adjustment of the water injection process.

[0003] Currently, microseismic monitoring is the primary method for waterflooding monitoring on the market. Other technologies include tracers and well-to-surface ERT. However, each has its own limitations. For example, weak surface microseismic signals result in a low number of monitoring events. Interwell microseismic monitoring is limited to the injection progress between two wells, and has certain limitations in understanding the plane surrounding the wells. Tracer monitoring can only determine the connectivity between injection wells and adjacent wells, but cannot monitor the conditions directly between wells. Well-to-surface ERT monitoring has a small number of measurement points and low monitoring accuracy. The monitoring results of these commonly used monitoring technologies are poor. Utility Model Content

[0004] The present application aims to propose an electromagnetic induction water injection and water drive monitoring device, which can improve the monitoring effect.

[0005] The present invention provides an electromagnetic induction water flooding monitoring device, comprising:

[0006] A transmitting system, the transmitting system comprising a first control unit, a power supply unit, an IGBT inverter drive unit and a signal output interface unit, the output end of the power supply unit being connected to the input end of the IGBT inverter drive unit, the output end of the IGBT inverter drive unit being connected to the signal output interface unit, the output end of the first control unit being connected to the control end of the power supply unit for controlling the power supply unit to output a DC signal, the output end of the first control unit being connected to the control end of the IGBT inverter drive unit for controlling the IGBT inverter drive unit to invert the DC signal into a time-domain induced polarization waveform signal or a dual-frequency induced polarization waveform, and the interface unit being connected to the ground for outputting the time-domain induced polarization waveform signal or the dual-frequency induced polarization waveform signal to the ground;

[0007] At least one receiving system is used to receive an electromagnetic induction signal, where the electromagnetic induction signal is a signal generated by the time domain induced polarization waveform signal or the dual-frequency induced polarization waveform after geological polarization.

[0008] According to some embodiments of the present application, the sending system further includes:

[0009] A power absorption unit, one end of which is connected to the power supply unit, and the other end of which is connected to the IGBT inverter drive unit.

[0010] According to some embodiments of the present application, the sending system further includes:

[0011] A dummy load unit is connected to the output end of the IGBT inverter drive unit.

[0012] According to some embodiments of the present application, the sending system further includes:

[0013] It also includes a current acquisition unit, which is used to acquire the current value of the signal output interface unit.

[0014] According to some embodiments of the present application, the sending system further includes:

[0015] A first communication unit is connected to the first control unit.

[0016] According to some embodiments of the present application, the sending system further includes:

[0017] A first GPS unit is connected to the first control unit.

[0018] According to some embodiments of the present application, the sending system further includes:

[0019] A verification output interface unit, wherein the output end of the first control unit is connected to the verification output interface unit.

[0020] According to some embodiments of the present application, the receiving system includes:

[0021] a second control unit;

[0022] A data acquisition unit is used to acquire the electromagnetic induction signal, and an output end of the data acquisition unit is connected to an input end of the second control unit.

[0023] According to some embodiments of the present application, the receiving system further includes:

[0024] A second GPS unit is connected to the second control unit.

[0025] According to some embodiments of the present application, the receiving system further includes:

[0026] A second communication unit is connected to the second control unit.

[0027] In the embodiment of the present application, a time domain induced polarization waveform signal or the dual-frequency induced polarization waveform signal is sent to the earth by a transmitting system, and an electromagnetic induction signal is received by a receiving system. Since water has low resistance in a geological body, during the actual water injection construction process, water will produce a strong electromagnetic induction signal after being induced and polarized, which is significantly different from the electromagnetic induction signal of the adjacent geological body. The electromagnetic induction signal can be used to monitor the flow direction of water and the size of water flow cracks during oil and gas construction, so as to judge whether the oil and gas fracturing direction and flow rate meet the on-site construction requirements. Compared with traditional monitoring technologies, the monitoring accuracy and monitoring depth of the embodiment of the present application are improved, and the monitoring effect is good.

[0028] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The present application is further described below with reference to the accompanying drawings and embodiments, wherein:

[0030] Figure 1 This is a functional block diagram of the sending system of an embodiment of the electromagnetic induction water injection and flooding monitoring device provided in this application;

[0031] Figure 2 An axonometric diagram of a transmitting system of an embodiment of an electromagnetic induction water injection and flooding monitoring device provided in this application;

[0032] Figure 3 This is a front view of the sending system of an embodiment of the electromagnetic induction water injection and flooding monitoring device provided by this application;

[0033] Figure 4 This is a left view of the transmitting system of an embodiment of the electromagnetic induction water injection and flooding monitoring device provided by the present application;

[0034] Figure 5 A top view of the transmitting system of an embodiment of the electromagnetic induction water injection and flooding monitoring device provided in this application;

[0035] Figure 6 This is a functional block diagram of a receiving system of an embodiment of the electromagnetic induction water injection and flooding monitoring device provided in this application;

[0036] Figure 7 This is a front view of the receiving system of an embodiment of the electromagnetic induction water injection and flooding monitoring device provided by this application;

[0037] Figure 8 This is a left view of the receiving system of an embodiment of the electromagnetic induction water injection and flooding monitoring device provided by the present application;

[0038] Figure 9 This is a top view of the receiving system of an embodiment of the electromagnetic induction water injection and water flooding monitoring device provided in this application.

[0039] Reference numerals:

[0040] First control unit 100, AC-DC power supply module 101, AC-DC switching power supply 102, IGBT inverter drive unit 103, signal output interface unit 104, power absorption unit 105, dummy load unit 106, current acquisition unit 107, first communication unit 108, first GPS unit 109, calibration output interface unit 110, first indicator light 111, color LCD screen 112, first shell 113, second control unit 200, signal acquisition circuit 201, junction box 202, second indicator light 203, second communication unit 204, second shell 114. DETAILED DESCRIPTION

[0041] The following describes in detail embodiments of the present application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application.

[0042] In the description of this application, it should be understood that descriptions involving orientation, such as the orientation or positional relationship indicated by up, down, etc., are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0043] In the description of this application, "a plurality" refers to more than two. The use of "first" or "second" is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features indicated, or implicitly indicating the order of the technical features indicated.

[0044] In the description of this application, unless otherwise clearly defined, terms such as setting, installation, and electrical connection should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meaning of the above terms in this application based on the specific content of the technical solution.

[0045] Refer to the following Figures 1 to 9 An electromagnetic induction water flooding monitoring device according to an embodiment of the present application is described, comprising:

[0046] Sending system, such as Figure 1 As shown, the sending system includes a first control unit 100, a power supply unit, an IGBT inverter drive unit 103 and a signal output interface unit 104, the output end of the power supply unit is connected to the input end of the IGBT inverter drive unit 103, the output end of the IGBT inverter drive unit 103 is connected to the signal output interface unit 104, the output end of the first control unit 100 is connected to the control end of the power supply unit for controlling the power supply unit to output a DC signal, the output end of the first control unit 100 is connected to the control end of the IGBT inverter drive unit 103 for controlling the IGBT inverter drive unit 103 to invert the DC signal into a time domain induced polarization waveform signal or a dual-frequency induced polarization waveform, and the interface unit is connected to the ground for outputting the time domain induced polarization waveform signal or the dual-frequency induced polarization waveform signal to the ground;

[0047] At least one receiving system is used to receive electromagnetic induction signals, where the electromagnetic induction signals are time domain induced polarization waveform signals or dual-frequency induced polarization waveform signals generated after geological polarization.

[0048] In the embodiment of the present application, a time domain induced polarization waveform signal or a dual-frequency induced polarization waveform signal is sent to the earth by a sending system, and a receiving system receives an electromagnetic induction signal. Since water has low resistance in a geological body, during the actual water injection construction process, water will produce a strong electromagnetic induction signal after being induced and polarized, which is significantly different from the electromagnetic induction signal of the adjacent geological body. The electromagnetic induction signal can be used to monitor the flow direction of water, the size of water flow cracks, etc. during the oil and gas construction process, so as to judge whether the oil and gas fracturing direction and flow rate meet the on-site construction requirements. The time domain induced polarization waveform signal or the dual-frequency induced polarization waveform signal is a low-frequency signal detection method, which has a large detection signal, strong anti-interference ability, high sensitivity, simple construction, and rich data acquisition. Compared with traditional monitoring technologies, the embodiments of the present application have improved monitoring accuracy, monitoring depth, etc., and have a good monitoring effect.

[0049] In some embodiments of the present application, Figure 2 Shown to Figure 5 As shown, the transmitting system includes a first housing 113 , the power supply unit and the IGBT inverter drive unit 103 are both disposed in the first housing 113 , and the signal output interface unit 104 is disposed on the first housing 113 .

[0050] A heat sink and cooling fan are located within the first housing 113. The heat sink rapidly dissipates heat from the IGBT inverter drive unit 103. During high-power transmission, the IGBT inverter drive unit 103 generates significant heat, which is aided by the cooling fan's air duct to dissipate the heat. The IGBT inverter drive unit 103 utilizes a conventional IGBT inverter, converting the DC signal output by the power supply unit into a stepped square wave signal to produce time-domain IP waveform signals or dual-frequency IP waveform signals corresponding to different exploration methods.

[0051] In some embodiments of the present application, a color LCD screen 112 is provided on the first housing 113, such as Figure 1 As shown, the color LCD screen 112 is connected to the first control unit 100 , and the working status of the sending system is displayed through the color LCD screen 112 .

[0052] In some embodiments of the present application, Figure 1 As shown, the power supply unit includes an AC-DC power supply module 101 and an AC-DC switching power supply 102. The AC-DC power supply module 101 is connected to an IGBT inverter drive unit 103. The AC-DC power supply module 101 outputs a DC signal to the IGBT inverter drive unit 103 for inversion. The AC-DC switching power supply 102 is connected to the first control unit 100, the IGBT inverter drive unit 103, etc., thereby providing a low-voltage DC operating power supply.

[0053] In some embodiments of the application, Figure 1 As shown, a first indicator light 111 is provided on the housing, and the first control unit 100 is connected to the first indicator light 111 , and the first indicator light 111 indicates information such as power supply and fault of the sending system.

[0054] In some implementations of the application, the first control unit 100 may be an MCU or the like.

[0055] In some embodiments of the application, the signal output interface unit 104 includes an A interface and a B interface, wherein the A interface is a positive output interface and the B interface is a negative output interface.

[0056] In some embodiments of the present application, the electromagnetic induction water injection and water flooding monitoring device can adopt a one-transmitter-multiple-receiver method, that is, it includes multiple receiving systems operating and can arrange receiving and collecting nodes in a large-scale array.

[0057] Some embodiments of the present application, such as Figure 1 As shown, the sending system also includes:

[0058] The power absorption unit 105 has one end connected to the power supply unit, and the other end connected to the IGBT inverter drive unit 103 .

[0059] In this embodiment, the power absorption unit 105 buffers the output of the AC-DC power module 101, thereby improving the output stability of the AC-DC power module 101. The power absorption unit 105 adopts a conventional absorption circuit composed of capacitors and resistors.

[0060] Some embodiments of the present application, such as Figure 1 As shown, the sending system also includes:

[0061] The dummy load unit 106 is connected to the output end of the IGBT inverter drive unit 103 .

[0062] In this embodiment, the dummy load unit 106 includes a dummy load interface and a dummy load resistor. The output end of the IGBT inverter drive unit 103 is connected to the dummy load interface, and the dummy load interface is connected to the dummy load resistor. The dummy load resistor is an ordinary pure resistor that plays a role in power balancing. For example, when the power supply unit is powered by a generator, the generator will frequently switch back and forth between high-power output and no-power output (infinite output resistance) during actual operation. When jumping from no-power output to high-power output, it will cause over-excited output, generating spike pulse voltage, which can easily damage the generator. Therefore, when there is no power output, voltage is supplied to the dummy load resistor to balance the overall power.

[0063] Some embodiments of the present application, such as Figure 1 As shown, the sending system also includes:

[0064] The system further includes a current acquisition unit 107 , which is used to acquire the current value of the signal output interface unit 104 .

[0065] In this embodiment, the current acquisition unit 107 uses a mutual inductor to acquire the current of the signal output interface unit 104 through the mutual inductor for use in calculating the geological resistivity in the subsequent monitoring calculation process.

[0066] According to some embodiments of the present application, Figure 1 As shown, the sending system also includes:

[0067] The first GPS unit 109 is connected to the first control unit 100 .

[0068] In this embodiment, the location information of the transmitting system is acquired through the first GPS unit 109. The first GPS unit 109 is a GPS module.

[0069] Some embodiments of the present application, such as Figure 1 As shown, the sending system also includes:

[0070] The first communication unit 108 is connected to the first control unit 100 .

[0071] In this embodiment, the first communication unit 108 includes a WIFI module, a first Bluetooth module, and a first mobile public network module. The WIFI module and the first Bluetooth module are both connected to the first control unit 100. The first control unit 100 transmits data to the host computer via the WIFI module, the first mobile public network module, or the first Bluetooth module. The host computer is installed with a transmission system control software, which is used for communication mode, waveform type configuration, transmission system status monitoring and control, current data storage, etc. The waveform type configuration is to encode the required transmission waveform and send the waveform code to the transmission system so that the transmission system can transmit the required waveform, that is, to transmit a time domain induced polarization waveform signal or a dual-frequency induced polarization waveform signal. The transmission system status monitoring and control is for the control software to monitor the status of the transmission system in real time, including the total output voltage and current of the AC-DC power supply module 101, the actual measured output current of the signal output interface unit 104, the radiator temperature, the location information of the first GPS unit 109, the fault information processing of the transmission system, and other aspects of status monitoring. The control software can also issue commands to control the operation and shutdown of the transmission system, changing the output voltage and current in real time. It also provides complex control functions such as one-button transmission, one-button stop, and emergency stop. Current data is stored in real time as the current output by the signal output interface unit 104. This current represents the actual output frequency-divided current and provides effective current data for subsequent calculations of geological resistivity. The host computer can be a computer, mobile phone, or other terminal.

[0072] Some embodiments of the present application, such as Figure 1 As shown, the sending system also includes:

[0073] The verification output interface unit 110 , the output end of the first control unit 100 is connected to the verification output interface unit 110 .

[0074] In this embodiment, the calibration output interface unit 110 is used to output a standard signal to the receiving system for consistency calibration. Because each channel in the transmitting and receiving systems has hardware differences, all channels must be calibrated to the same value to eliminate errors introduced by the hardware. The standard signal is a 20mVp-p time domain signal or a dual-frequency signal.

[0075] Some embodiments of the present application, such as Figure 6 As shown, the receiving system includes:

[0076] A second control unit 200;

[0077] The data acquisition unit is used to acquire electromagnetic induction signals, and the output end of the data acquisition unit is connected to the input end of the second control unit 200.

[0078] In this embodiment, the data acquisition unit performs signal conditioning, amplification, analog-to-digital conversion, data reading, and data processing on the electromagnetic induction signal. The data acquisition unit uses a conventional signal acquisition circuit 201. The second control unit 200 can use an MCU.

[0079] Some embodiments of the present application, such as Figures 7 to 9 As shown, the receiving system also includes:

[0080] The second housing 114, the second control unit 200, and the data acquisition unit are all housed within the second housing 114. A cooling fan is provided within the second housing 114. The second housing 114 is provided with a power port, an electromagnetic induction signal input port, a second indicator light 203, and a calibration port. The electromagnetic induction signal input port is used to input electromagnetic induction signals. The second indicator light 203 indicates the power supply and fault status of the transmission system. The calibration port is used to input a standard signal for consistency calibration.

[0081] In one embodiment of the present application, the receiving system further includes:

[0082] The second GPS unit is connected to the second control unit 200 .

[0083] In this embodiment, the receiving system is positioned by a second GPS unit, which is a GPS module.

[0084] Some embodiments of the present application, such as Figure 6 As shown, the receiving system also includes:

[0085] The second communication unit 204 is connected to the second control unit 200 .

[0086] In this embodiment, the second communication unit 204 includes a second mobile public network module and a second Bluetooth module. The sending system transmits data to the host computer via the second mobile public network module or the second Bluetooth module to facilitate full-scenario application in actual construction. The second mobile public network module supports the host computer for large-scale remote monitoring. The host computer is installed with the receiving system control software.

[0087] The second control unit 200 performs centralized integration processing on the data collected by the data acquisition unit, performs local backup storage and uploads it to the control software. The data acquisition unit includes 6 multi-channel signal acquisition circuits 201, each signal acquisition circuit 201 has 12 channels, forming a total of 72 channels, and its main function is to perform signal conditioning, amplification, analog-to-digital conversion, data reading, and data processing on the collected signals. The maximum sampling rate of each channel is 120KHz / s, which can realize 72-channel parallel data acquisition and perform efficient and fast data processing. There are 6 electromagnetic induction signal input interfaces, and each is equipped with 6 junction boxes 202. Each junction box 202 provides 12 channel terminal blocks to meet 72-channel parallel data acquisition. The receiving system uses a calibration interface for consistency calibration. During calibration, all channels are automatically connected in parallel inside the receiving system to facilitate centralized and unified calibration.

[0088] The main functions of the receiving system control software include status monitoring, parameter setting, data viewing, curve viewing, and project management. The control software communicates with the receiving system through the second mobile public network module or the second Bluetooth module, can view the status of the receiving system in real time, and can control the execution of the receiving system functions. The control software can manage and connect to one or more receiving systems, can set the receiving system parameters for a single unit or by broadcast, and can view the collected values ​​of each channel of each receiving system in the form of data display. It can also view the real-time dynamic curve of all channels during the collection process in the form of curves. For abnormal channels or emergencies during on-site construction, the control software can record, view, and store them one by one in real time. The control software can simultaneously receive the data calculation results of multiple receiving systems, and store the data calculation results locally for backup, and transmit them to the cloud server at the same time to provide real-time data for later data processing and water injection effect presentation.

[0089] The embodiments of the present application are described in detail above in conjunction with the accompanying drawings, but the present application is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the relevant technical field without departing from the purpose of the present application.

Claims

1. An electromagnetic induction water injection and water flooding monitoring device, characterized in that: include: A transmitting system, the transmitting system comprising a first control unit, a power supply unit, an IGBT inverter drive unit and a signal output interface unit, the output end of the power supply unit being connected to the input end of the IGBT inverter drive unit, the output end of the IGBT inverter drive unit being connected to the signal output interface unit, the output end of the first control unit being connected to the control end of the power supply unit for controlling the power supply unit to output a DC signal, the output end of the first control unit being connected to the control end of the IGBT inverter drive unit for controlling the IGBT inverter drive unit to invert the DC signal into a time-domain induced polarization waveform signal or a dual-frequency induced polarization waveform, and the interface unit being connected to the ground for outputting the time-domain induced polarization waveform signal or the dual-frequency induced polarization waveform signal to the ground; At least one receiving system is used to receive an electromagnetic induction signal, where the electromagnetic induction signal is a signal generated by the time domain induced polarization waveform signal or the dual-frequency induced polarization waveform after geological polarization.

2. The electromagnetic induction water injection and flooding monitoring device according to claim 1 is characterized in that: The sending system also includes: A power absorption unit, one end of which is connected to the power supply unit, and the other end of which is connected to the IGBT inverter drive unit.

3. The electromagnetic induction water injection and flooding monitoring device according to claim 1 is characterized in that: The sending system also includes: A dummy load unit is connected to the output end of the IGBT inverter drive unit.

4. The electromagnetic induction water injection and flooding monitoring device according to claim 1, characterized in that: The sending system also includes: It also includes a current acquisition unit, which is used to acquire the current value of the signal output interface unit.

5. The electromagnetic induction water injection and flooding monitoring device according to claim 1 is characterized in that: The sending system also includes: A first communication unit is connected to the first control unit.

6. The electromagnetic induction water injection and flooding monitoring device according to claim 1, characterized in that: The sending system also includes: A first GPS unit is connected to the first control unit.

7. The electromagnetic induction water injection and flooding monitoring device according to claim 1 is characterized in that: The sending system also includes: A verification output interface unit, wherein the output end of the first control unit is connected to the verification output interface unit.

8. The electromagnetic induction water injection and flooding monitoring device according to claim 1, characterized in that: The receiving system comprises: a second control unit; A data acquisition unit is used to acquire the electromagnetic induction signal, and an output end of the data acquisition unit is connected to an input end of the second control unit.

9. The electromagnetic induction water injection and flooding monitoring device according to claim 8, characterized in that: The receiving system further includes: A second GPS unit is connected to the second control unit.

10. The electromagnetic induction water injection and flooding monitoring device according to claim 8, characterized in that: The receiving system further includes: A second communication unit is connected to the second control unit.

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