Electromagnetic wave measurement-while-drilling ground receiving system and method

Abstract

The application relates to an electromagnetic wave MWD ground receiving system and method, which comprises a ground receiver, a receiving antenna, a host computer and a driller display; the ground receiver is in communication connection with the receiving antenna, the driller display and the host computer respectively; the ground receiver is used for receiving signals carrying drilling information transmitted by a downhole electromagnetic wave MWD instrument and demodulating the signals to obtain the drilling information and send the drilling information to a remote device pointed to by an IP address of the host computer, the driller display and the ground receiver; the ground receiver is also used for optimizing performance parameters of the ground receiver based on a first control signal sent by the host computer and optimizing the performance parameters of the ground receiver based on a second control signal sent by the remote device. The system provided by the application can upload received data to the remote device and receive data from the remote device, and can flexibly configure and optimize the performance parameters of the ground receiver in real time.

Description

Technical Field

[0001] This invention relates to a ground receiving system and method for electromagnetic wave measurement while drilling. Background Technology

[0002] Electromagnetic wave measurement while drilling (EMWD) technology measures geological and engineering parameters in real time during drilling. It transmits electromagnetic signals downhole to achieve real-time uploading of drilling information, which is then received and processed by an EWD surface receiving system to provide real-time data for drilling guidance and control decisions. EWD technology features a downhole information transmission channel that is not limited by the drilling circulation medium and has a significantly higher transmission rate than conventional mud pressure pulses. It can be widely used in oil and gas, coalbed methane, and shale gas exploration and production drilling operations using conventional mud, foam mud, aerated or gaseous circulation media. The EWD surface receiving system receives and processes weak signals, demodulates and displays signals transmitted by downhole instruments, providing decision-making data for drilling engineers. Summary of the Invention

[0003] The inventors of this invention have discovered that in practical electromagnetic wave (EMW) measurement applications, a large measurement well depth and a high data transmission rate are essential to ensure accurate signal transmission. However, a high data transmission rate requires a high signal carrier frequency. But as electromagnetic waves propagate through the formation, the higher the frequency of the electromagnetic wave signal, the greater the attenuation of the electromagnetic wave signal by the formation. Moreover, the signal attenuation factor increases with formation depth. Therefore, lower frequencies are used in deep well operations, as lower frequencies propagate over longer distances. Consequently, the transmission frequency of the downhole EMW instrument needs to be adaptable to the transmission environment, and the performance parameters of the ground receiver should also be adjusted accordingly. In view of the above problems, this invention provides an EMW surface receiving system and method to solve or partially solve these problems. The technical solution proposed by this invention is as follows:

[0004] In a first aspect, the present invention provides an electromagnetic wave measurement while drilling ground receiving system, comprising: a ground receiver, a receiving antenna, a host computer, and a driller's display; wherein the ground receiver is communicatively connected to the receiving antenna, the driller's display, and the host computer respectively;

[0005] The ground receiver is used to receive the signal carrying drilling information transmitted by the downhole electromagnetic wave measurement-while-drilling instrument picked up by the receiving antenna, demodulate the drilling signal to obtain the drilling information, and send the drilling information to the host computer, the driller's display and the remote device pointed to by the IP address configured on the ground receiver.

[0006] The host computer is used to determine a first control signal based on the received drilling information and send the first control signal to the ground receiver.

[0007] The remote device is used to determine a second control signal based on the received drilling information and send the second control signal to the ground receiver.

[0008] The ground receiver is further configured to receive the first control signal sent by the host computer, and optimize the performance parameters of the ground receiver in real time based on the first control signal; and to receive the second control signal sent by the remote device, and optimize the performance parameters of the ground receiver in real time based on the second control signal.

[0009] In one or more embodiments, the ground receiver includes a first-stage amplification unit, a filtering unit, a second-stage amplification unit, a driving unit, and a signal processor;

[0010] The input terminal of the first-stage amplification unit is connected to the receiving antenna, the output terminal of the first-stage amplification unit is connected to the input terminal of the filtering unit, the output terminal of the filtering unit is connected to the input terminal of the second-stage amplification unit, the output terminal of the second-stage amplification unit is connected to the input terminal of the driving unit, the output terminal of the driving unit is connected to the input terminal of the signal processor, and the control terminal of the second-stage amplification unit is connected to the signal processor.

[0011] In one or more embodiments, the signal processor is communicatively connected to the host computer and the remote device, respectively, and is used to optimize the filtering coefficients and demodulation algorithm of the signal processor in real time according to the first control signal transmitted by the host computer or the second control signal transmitted by the remote device.

[0012] In one or more embodiments, the signal processor includes an ADC module and a digital filter, wherein one end of the ADC module is connected to the driving unit and the other end is connected to the digital filter; the filter coefficients are optimized in the following manner:

[0013] The host computer or the remote device is used to determine the passband cutoff frequency, stopband cutoff frequency, maximum passband attenuation coefficient, and minimum stopband attenuation coefficient of the digital filter based on the frequency of the downhole electromagnetic wave transmission signal in the sampling sequence of the ADC module, and send the passband cutoff frequency, stopband cutoff frequency, maximum passband attenuation coefficient, and minimum stopband attenuation coefficient to the signal processor.

[0014] The signal processor is used to determine the filtering coefficients based on the passband cutoff frequency, stopband cutoff frequency, passband maximum attenuation coefficient, and stopband minimum attenuation coefficient, and to control the digital filter to operate according to the filtering coefficients.

[0015] In one or more embodiments, the signal processor includes a demodulation module;

[0016] The demodulation module is connected to the digital filter and is used to perform cross-correlation calculation between the output signal of the digital filter and the input symbol signal using the following formula to obtain the cross-correlation calculation result; the input symbol signal is obtained through the host computer or the remote device.

[0017]

[0018] in: For time delay; ; The results are from cross-correlation calculations; The output signal of the digital filter has a length of ; The input symbol signal has a length of M;

[0019] If the cross-correlation calculation result does not reach the preset threshold, the output signal of the digital filter is shifted according to the next time delay until the cross-correlation calculation result reaches the preset threshold, and the symbol information in the output signal of the digital filter is obtained to obtain the drilling information.

[0020] In one or more embodiments, the ground receiver further includes a GPRS module;

[0021] The GPRS module is connected to the signal processor and communicates with the host computer and the remote device respectively. It is used to send the first control signal sent by the host computer or the second control signal sent by the remote device to the signal processor, so that the signal processor adjusts the amplification coefficient of the second stage amplification unit, the filtering parameters of the filtering unit, the filtering coefficient of the digital filter, and the demodulation algorithm of the demodulation module according to the first control signal or the second control signal.

[0022] In one or more embodiments, the GPRS module includes a first antenna, a second antenna, a first matching circuit, a second matching circuit, and a GPRS chip;

[0023] The first antenna is used to receive and transmit network data signals, and the second antenna is used to receive satellite positioning information data;

[0024] The first antenna is connected to the GPRS chip through the first matching circuit, and the second antenna is connected to the GPRS chip through the second matching circuit.

[0025] In one or more embodiments, the GPRS module further includes a first driving circuit and a second driving circuit;

[0026] One end of the first driving circuit is connected to the signal processor, and the other end is connected to the GPRS chip;

[0027] One end of the second driving circuit is connected to the signal processor, and the other end is connected to the GPRS chip.

[0028] In one or more embodiments, the GPRS module further includes a USIM module;

[0029] The USIM module is connected to the GPRS chip.

[0030] In one or more embodiments, the GPRS module further includes a first level conversion chip and a second level conversion chip;

[0031] The first level conversion chip is connected to the GPRS chip and the signal processor respectively;

[0032] The second level conversion chip is connected to both the GPRS chip and the signal processor.

[0033] In one or more embodiments, the second-stage amplification unit is a VGA amplifier.

[0034] Secondly, the present invention provides an application of the electromagnetic wave drilling measurement ground receiving system as described in the first aspect in electromagnetic wave drilling measurement.

[0035] Thirdly, the present invention provides a method for optimizing the performance parameters of an electromagnetic wave measurement while drilling ground receiving system, using the electromagnetic wave measurement while drilling ground receiving system as described in the first aspect.

[0036] In one or more embodiments, the method for optimizing the performance parameters of the electromagnetic wave measurement-while-drilling ground receiving system includes:

[0037] The ground receiver receives the signal carrying drilling information from the downhole electromagnetic wave measurement instrument, which is picked up by the receiving antenna, and demodulates the drilling signal to obtain the drilling information. The drilling information is then sent to the remote device pointed to by the IP address configured on the host computer or the ground receiver.

[0038] The host computer determines a first control signal based on the received drilling information and sends the first control signal to the ground receiver; or, the remote device determines a second control signal based on the received drilling information and sends the second control signal to the ground receiver.

[0039] The ground receiver receives the first control signal sent by the host computer or the second control signal sent by the remote device, and optimizes the performance parameters of the ground receiver in real time based on the first control signal or the second control signal.

[0040] Fourthly, the present invention provides an electronic device, including a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other through the communication bus;

[0041] Memory, used to store computer programs;

[0042] When the processor executes the program stored in the memory, it implements the steps of the method for optimizing the performance parameters of the electromagnetic wave measurement while drilling ground receiving system as described in the third aspect.

[0043] Fifthly, the present invention provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the steps of the method for optimizing the performance parameters of an electromagnetic wave measurement while drilling ground receiving system as described in the third aspect.

[0044] Based on the above technical solution, the beneficial effects of the present invention compared with the prior art are as follows:

[0045] The electromagnetic wave measurement-while-drilling (MWD) ground receiving system provided by this invention has a ground receiver that is communicatively connected to a receiving antenna, a driller's display, and a host computer. The ground receiver receives signals carrying MWD information from the downhole MWD instrument, picked up by the receiving antenna, demodulates the signals to obtain the MWD information, and sends it to the host computer. The host computer determines a first control signal based on the received MWD information and sends it to the ground receiver, controlling the ground receiver to optimize its performance parameters based on the first control signal. Furthermore, the ground receiver can transmit the MWD information to a remote device linked to its configured IP address, providing a basis for real-time expert decision-making. When the downhole transmission environment changes or the MWD instrument's transmission frequency changes, the remote device determines a second control signal based on the received MWD information and transmits it to the ground receiver. The ground receiver then optimizes its performance parameters in real-time based on the second control signal, ensuring it operates at its optimal state and can adapt to changes in the downhole transmission environment and the MWD instrument's transmission frequency.

[0046] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention are realized and obtained through the structures particularly pointed out in the description and the drawings.

[0047] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0048] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0049] Figure 1 This is a system architecture diagram of the electromagnetic wave drilling measurement ground receiving system provided in Embodiment 1 of the present invention;

[0050] Figure 2 This is a system structure diagram of the electromagnetic wave drilling measurement ground receiving system provided in Embodiment 1 of the present invention;

[0051] Figure 3 This is a partial schematic diagram of the GPRS module provided in Embodiment 1 of the present invention;

[0052] Figure 4 This is another schematic diagram of the GPRS module provided in Embodiment 1 of the present invention;

[0053] Figure 5 This is a flowchart illustrating the method for optimizing the performance parameters of an electromagnetic wave measurement-while-drilling ground receiving system according to Embodiment 3 of the present invention.

[0054] Figure 6 This is a schematic diagram of the structure of the electronic device provided in Embodiment 5 of the present invention. Detailed Implementation

[0055] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0056] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention.

[0057] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0058] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0059] Example 1

[0060] The electromagnetic wave measurement-while-drilling (EMD) surface receiving system receives and processes weak signals, as well as demodulates and displays signals transmitted by downhole instruments, providing decision-making data for drilling engineers. The surface receiving system mainly consists of the following components: a receiving antenna, a surface receiver, a host computer, and a driller's display. The receiving antenna receives signals from the ground and transmits them to the surface receiver via wires. The receiver amplifies, filters, acquires, and demodulates the signals, then uploads the demodulated data to the host computer for display, storage, and processing. Simultaneously, the demodulated data is sent from the surface receiver to the driller's display, which also displays some drilling parameters graphically and visually. Currently, ground receivers used in the aforementioned fields lack communication capabilities, let alone network communication capabilities. Real-time demodulated information can only be received and displayed on-site, while remote drilling experts cannot obtain data information in real time, affecting timely decision-making. Furthermore, the gain of the ground receiver is adjusted via an external knob, but other system parameters, such as the designed digital filters and demodulation algorithms, cannot be changed. Although redundancy and compatibility are considered in the design, the ground receiver cannot operate at its optimal state as drilling depth and geological conditions change, affecting signal reception and demodulation. In practical electromagnetic wave measurement while drilling applications, the goal is to measure depth and transmit quickly. That is, while ensuring accurate signal transmission, the measurement well depth should be large, and the data transmission rate should be as fast as possible. A high data transmission rate requires a high signal carrier frequency. However, when electromagnetic waves propagate through the formation, the higher the frequency, the greater the signal attenuation. Moreover, signal attenuation increases with depth. Therefore, lower frequencies are used in deep well operations, as lower frequencies propagate over longer distances. Thus, the transmission frequency of downhole electromagnetic wave measurement while drilling instruments must be able to change according to the transmission environment, and the corresponding ground receiver should also be adjusted accordingly.

[0061] Based on this, embodiments of the present invention provide a ground receiving system for electromagnetic wave measurement while drilling, referring to... Figure 1 As shown, it includes: a ground receiver 100, a receiving antenna, a host computer 101, and a driller's display 102; the ground receiver 100 is communicatively connected to the receiving antenna, the driller's display 102, and the host computer 101 respectively.

[0062] The receiving antenna consists of two electrodes. Typically, the drilling rig 104 is selected as one electrode, and the other electrode is a low-resistance, corrosion-resistant metal rod 103 that is easily inserted into the formation. The two electrodes are connected to the input terminal of the ground receiver 100 via wires. The metal rod 103 constitutes the signal receiving antenna of the ground receiving system, and the drilling rig 104 constitutes the ground receiving antenna ground. The metal rod 103 and the drilling rig 104, as the system receiving antennas, pick up the signals transmitted by the downhole electromagnetic wave measurement-while-drilling instrument, input them to the ground receiver 100 via wires, and the ground receiver 100 processes and demodulates the signal carrying the drilling information uploaded by the downhole electromagnetic wave measurement-while-drilling instrument. This information is then uploaded to the host computer 101 for display and storage, and finally sent to the driller's display 102 for display.

[0063] The driller's display 102 is connected to the ground receiver 100 via a serial bus to receive geological and engineering information data sent by the ground receiver 100 and display it in real time.

[0064] The ground receiver 100 is used to receive the signal carrying drilling information transmitted by the downhole electromagnetic wave measurement-while-drilling instrument picked up by the receiving antenna, demodulate the signal to obtain the drilling information, and send the drilling information to the remote device pointed to by the IP address configured on the host computer 101, the driller's display 102, and the ground receiver 100.

[0065] The ground receiver 100 receives the signal input from the receiving antenna, amplifies, filters, and demodulates the signal to extract the drilling information carried by the signal, and transmits it to the host computer 101 and the driller's display 102 via a serial port; it also transmits it to a designated remote terminal device (i.e., a remote device) via a network module. The ground receiver 100 can connect to the remote device and receive data transmitted by the remote device for real-time optimization of the ground receiver's amplification, filtering performance, and demodulation algorithm.

[0066] The host computer 101 is used to determine a first control signal based on the received drilling information and send the first control signal to the ground receiver 100.

[0067] The host computer 101, consisting of a computer and its peripheral equipment, is used to display drilling information and store demodulation data; it can also send data to the ground receiver 100 to optimize the amplification, filtering performance and demodulation algorithm of the ground receiver 100 in real time.

[0068] The remote device is used to determine a second control signal based on the received drilling information and send the second control signal to the ground receiver 100;

[0069] The ground receiver 100 is further configured to receive the first control signal sent by the host computer 101, and optimize the performance parameters of the ground receiver 100 in real time based on the first control signal; and to receive the second control signal sent by the remote device, and optimize the performance parameters of the ground receiver 100 in real time based on the second control signal. The ground receiver 100 can transmit drilling information to the remote device in real time, and can also receive data sent by the remote device to improve and optimize performance.

[0070] This invention provides an electromagnetic wave measurement-while-drilling (MSWD) surface system with remote information transmission capabilities, belonging to the field of oil and gas, coalbed methane, and shale gas drilling. Specifically, it relates to a surface receiving system for signals transmitted by downhole instruments used in MSWD. This system can receive and demodulate signal information uploaded by downhole instruments of the MSWD system, and can transmit the demodulated information to designated remote devices via a network. It can also receive data provided by remote devices, flexibly configure the surface receiver to optimize its performance, and includes geolocation positioning functionality. The surface receiver 100 of this system has wired or wireless network communication capabilities, can access public communication networks in real time for network communication, and can transmit drilling data via the network to remote devices used by drilling experts, providing a basis for real-time expert decision-making. Correspondingly, when the downhole transmission environment changes and the transmission frequency of the downhole electromagnetic wave measurement-while-drilling instrument changes, the instrument expert can directly modify the amplification factor, digital filter parameters, and demodulation algorithm of the ground receiver 100 by sending data down through the host computer 101. Similarly, the remote instrument expert can also send data to the ground receiver 100 through the network to modify the amplification factor, digital filter parameters, and demodulation algorithm of the ground receiver 100 to optimize the performance of the ground receiver 100.

[0071] In one embodiment, refer to Figure 2 As shown, the ground receiver 100 includes a first-stage amplification unit 200, a filtering unit 201, a second-stage amplification unit 202, a driving unit 203, and a signal processor 204;

[0072] The input terminal of the first-stage amplification unit 200 is connected to the receiving antenna, the output terminal of the first-stage amplification unit 200 is connected to the input terminal of the filtering unit 201, the output terminal of the filtering unit 201 is connected to the input terminal of the second-stage amplification unit 202, the output terminal of the second-stage amplification unit 202 is connected to the input terminal of the driving unit 203, the output terminal of the driving unit 203 is connected to the input terminal of the signal processor 204, and the control terminal of the second-stage amplification unit 202 is connected to the signal processor 204.

[0073] Reference Figure 2As shown, the first-stage amplification unit 200 is a pre-amplification stage; the filtering unit 201 is a high-order filter; the second-stage amplification unit 202 is a VGA amplifier, which is a digitally controlled variable gain amplifier; the driving unit 203 is an ADC driver; and the signal processor 204 is a digital signal processor. The receiving antenna picks up the signal transmitted by the downhole electromagnetic wave measurement-while-drilling instrument and feeds the signal to the ground receiver 100 through a wire, and then inputs it to the first-stage amplification unit 200 for signal pre-amplification. The first-stage amplification unit 200 is composed of an instrumentation amplifier. The signal amplified by the first-stage amplification unit 200 is input to the filtering unit 201 for filtering. The filtered signal is output to the second-stage amplification unit 202. The second-stage amplification unit 202 is a VGA amplifier, which is a digitally controlled variable gain amplifier, meaning that its amplification gain is controlled by the I / O (input / output) port of the signal processor 204 through a program. The signal output from the second-stage amplification unit 202 is then conditioned by the drive unit 203 to the voltage input range of the ADC module of the digital signal processor 204. The ADC module of the signal processor 204 converts this signal into a digital signal. The converted digital signal undergoes digital filtering in the signal processor 204, and a demodulation algorithm is used to demodulate the information data carried by the signal uploaded by the downhole electromagnetic wave measurement-while-drilling system. This information data is then transmitted from the serial port of the digital signal processor 204 to the host computer 101, the driller's display 102, and the GPRS module 205. The serial port includes UART, USB, and their converted RS232 and RS485 protocols; the appropriate protocol can be selected based on the transmission distance, which will not be elaborated here.

[0074] The serial port 1 of the signal processor 204 is connected to the host computer 101, and the serial port 2 of the signal processor 204 is connected to the driller's display 102.

[0075] The control terminal of the second-stage amplification unit 202 is connected to the signal processor 204. The host computer 101 displays and stores the information data sent by the ground receiver 100. The host computer 101 communicates bidirectionally with the ground receiver 100 through its serial port. The host computer 101 sends data to the ground receiver 100 through its serial port. When the ground receiver 100 receives the data, it controls its IO output to the second-stage amplification unit 202 (VGA amplifier) ​​to change its gain.

[0076] The ground receiver 100 also includes a power supply module 206 for supplying power to the first-stage amplification unit 200, the filtering unit 201, the second-stage amplification unit 202, the driving unit 203, and the signal processor 204.

[0077] In one embodiment, the signal processor 204 is communicatively connected to the host computer 101 and the remote device, respectively, and is used to optimize the filtering coefficients and demodulation algorithm of the signal processor 204 in real time according to the first control signal transmitted by the host computer 101 or the second control signal transmitted by the remote device.

[0078] In one embodiment, the signal processor 204 includes an ADC module and a digital filter. One end of the ADC module is connected to the driving unit 203, and the other end is connected to the digital filter. The filter coefficients are optimized in the following manner:

[0079]

[0080] Where y(n) is the output of the digital filter, x(n) is the sequence of sampling length N of the ADC module of the signal processor 204, and h(n) is the filter coefficient;

[0081] The host computer 101 or the remote device is used to determine the passband cutoff frequency fp, stopband cutoff frequency fs, passband maximum attenuation coefficient Ap, and stopband minimum attenuation coefficient As of the digital filter based on the frequency of the downhole electromagnetic wave transmission signal in the sampling sequence of the ADC module, and send the passband cutoff frequency fp, stopband cutoff frequency fs, passband maximum attenuation coefficient Ap, and stopband minimum attenuation coefficient As to the signal processor 204;

[0082] The signal processor 204 is used to determine the filtering coefficients based on the passband cutoff frequency, stopband cutoff frequency, passband maximum attenuation coefficient, and stopband minimum attenuation coefficient, and to control the digital filter to operate according to the filtering coefficients.

[0083] The host computer 101 sends parameters such as the passband cutoff frequency fp, the stopband cutoff frequency fs, the maximum passband attenuation coefficient Ap, and the minimum stopband attenuation coefficient As to the serial port of the signal processor 204 through its serial port. The signal processor 204 receives these data and calculates the required filter coefficient h(n), thereby optimizing the filter coefficient of the ground receiver 100. The specific algorithm can be found in the detailed discussion of filter coefficient optimization in the prior art, and will not be elaborated here.

[0084] In one embodiment, the data y(n) output by the digital filter needs to be demodulated, and the signal processor 204 includes a demodulation module;

[0085] The demodulation module is connected to the digital filter and is used to perform cross-correlation calculation between the output signal of the digital filter and the input symbol signal using the following formula to obtain the cross-correlation calculation result; the input symbol signal is obtained through the host computer or the remote device.

[0086]

[0087] in: For time delay; ; The results are from cross-correlation calculations; The output signal of the digital filter has a length of N; The input symbol signal has a length of M;

[0088] If the cross-correlation calculation result does not reach the preset threshold, the output signal of the digital filter is shifted according to the next time delay until the cross-correlation calculation result reaches the preset threshold, and the symbol information in the output signal of the digital filter is obtained to obtain the drilling information.

[0089] If the transmission frequency of the downhole electromagnetic wave measurement while drilling instrument changes, the symbol signal z(n) of the demodulated signal needs to be changed. Simply send the transmission frequency of the downhole electromagnetic wave measurement while drilling instrument to the signal processor 204 through the serial port of the host computer 101. The signal processor 204 can then generate a new symbol signal z(n) to update the demodulation algorithm and optimize the performance of the ground receiver 100.

[0090] In one embodiment, refer to Figure 2 As shown, the ground receiver 100 also includes a GPRS module 205;

[0091] The GPRS module 205 is connected to the signal processor 204 and communicates with both the host computer 101 and the remote device. It transmits the first control signal from the host computer 101 or the second control signal from the remote device to the signal processor 204, enabling the signal processor 204 to adjust the amplification coefficient of the second-stage amplification unit 202, the filtering parameters of the filtering unit 201, the filtering coefficients of the digital filter, and the demodulation algorithm of the demodulation module based on the first or second control signal. The signal processor 204 sends commands to the GPRS module 205 via its UART to query location information. The satellite positioning receiving antenna ANT2 of the GPRS module 205 receives satellite geolocation signals and demodulates the location information, sending it to the signal processor 204. The signal processor 204 then sends the information to the host computer 101 for display.

[0092] Specifically, the serial port of the GPRS module 205 is connected to the serial port UART of the signal processor 204 to realize data interaction between the two; the IO module of the signal processor 204 is connected to the GPRS module 205 to realize the initialization of the GPRS module 205 by the signal processor 204, that is, to control the GPRS module 205 to reset, start or stop working.

[0093] In one embodiment, refer to Figure 3 and Figure 4 As shown, the GPRS module 205 includes a first antenna, a second antenna, a first matching circuit, a second matching circuit, and a GPRS chip. It should be noted that U2B and U2C are the first and second sub-diagrams of the GPRS chip, respectively. For ease of explanation, they will be referred to as GPRS chip U2B and GPRS chip U2C, respectively.

[0094] The first antenna ANT1 is the main antenna, and the second antenna ANT2 is the satellite positioning receiving antenna. The first antenna ANT1 is used to receive and transmit network data signals, and the second antenna ANT2 receives satellite positioning information data.

[0095] The first antenna ANT1 is used to receive and transmit network data signals, and the second antenna ANT2 is used to receive satellite positioning information data;

[0096] The first antenna ANT1 is connected to the GPRS chip U2B through the first matching circuit, and the second antenna ANT2 is connected to the GPRS chip U2B through the second matching circuit.

[0097] Reference Figure 3 As shown, the first matching circuit includes capacitor C13, resistor R6 and capacitor C14. The first end of capacitor C13 is connected to the first antenna ANT1 and the first end of resistor R6 respectively, and the second end of capacitor C13 is grounded. The second end of resistor R6 is connected to the first end of capacitor C14 and ANT_MAIN (pin 49) of GPRS chip U2B respectively, and the second end of capacitor C14 is grounded.

[0098] Reference Figure 3 As shown, the second matching circuit includes capacitor C24, capacitor C55, resistor R3, and capacitor C56. The first end of capacitor C24 is connected to the second antenna ANT2. The second end of capacitor C24 is connected to the first end of capacitor C55 and the first end of resistor R3. The second end of capacitor C55 is grounded. The second end of resistor R3 is connected to the first end of capacitor C56 and the ANT_GNSS (pin 47) of the GPRS chip U2B. The second end of capacitor C56 is grounded.

[0099] The GPRS module 205 also includes a capacitor C27, an inductor L5, and a resistor R22. The first end of the capacitor C27 is connected to the power supply VCC and the first end of the inductor L5, respectively. The second end of the capacitor C27 is grounded. The second end of the inductor L5 is connected to the first end of the resistor R22. The second end of the resistor R22 is connected to the second antenna ANT2 and the first end of the capacitor C24.

[0100] In one embodiment, refer to Figure 3 As shown, the GPRS module 205 also includes a first driving circuit and a second driving circuit;

[0101] One end of the first driving circuit is connected to the signal processor 204, and the other end is connected to the GPRS chip U2B;

[0102] One end of the second driving circuit is connected to the signal processor 204, and the other end is connected to the GPRS chip U2B.

[0103] Specifically, the first driving circuit includes resistors R12 and R14, and transistor Q3. The first end of resistor R12 is connected to the I / O port of signal processor 204. The second end of resistor R12 is connected to both the first end of resistor R14 and the base of transistor Q3. The emitter of transistor Q3 and the second end of resistor R14 are grounded. The collector of transistor Q3 is connected to the REST_N pin of the GPRS chip U2B. REST_N is the reset pin of the GPRS chip U2B.

[0104] The second driving circuit includes resistors R11 and R13, and transistor Q2. The first end of resistor R11 is connected to the I / O port of signal processor 204. The second end of resistor R11 is connected to both the first end of resistor R13 and the base of transistor Q2. The emitter of transistor Q2 and the second end of resistor R13 are grounded. The collector of transistor Q2 is connected to the PERKEY pin of the GPRS chip U2B. PERKEY is the power-on / off pin of the GPRS chip.

[0105] Both transistors Q2 and Q3 are NPN transistors.

[0106] In one embodiment, refer to Figure 3 As shown, the GPRS module 205 also includes a USIM module, which is connected to the GPRS chip U2B.

[0107] The USIM module is a user identification card for accessing the communication network and its peripheral circuitry, as referred to... Figure 3As shown, the USIM module includes: a USIM card holder, resistors R7, R8, R9, and R10, capacitors C15, C16, C17, C18, and C19, TVS1, and TVS2. The USIM card holder is used to install the USIM card.

[0108] The first end of resistor R8 is connected to the USIM_CLK of the GPRS chip U2B, and the second end of resistor R8 is connected to the SIM1_CLK of the USIM card; the first end of resistor R9 is connected to the USIM_DATA of the GPRS chip U2B, and the second end of resistor R9 is connected to the SIM1_DATA of the USIM card; the first end of resistor R10 is connected to the USIM_RST of the GPRS chip U2B, and the second end of resistor R10 is connected to the SIM1_RST of the USIM card.

[0109] The first terminal of capacitor C16 is connected to the second terminal of resistor R10, the first terminal of capacitor C17 is connected to the second terminal of resistor R9, the first terminal of capacitor C18 is connected to the second terminal of resistor R8, and the second terminals of capacitor C16, capacitor C17, and capacitor C18 are grounded; the first terminal of capacitor C19 is connected to the common terminal of USIM_VDD of GPRS chip U2B and SIM1_VDD of USIM card, and the second terminal of capacitor C19 is grounded.

[0110] The USIM_GND of the GPRS chip U2B is connected to the SIM1_GND of the USIM card, and the USIM_VDD of the GPRS chip U2B is connected to the SIM1_VDD of the USIM card.

[0111] The first end of capacitor C15 is connected to the common terminal of USIM_GND of GPRS chip U2B and SIM1_GND of USIM card. The second end of capacitor C15 is connected to the first end of resistor R7 and the common terminal of USIM_VDD of GPRS chip U2B and SIM1_VDD of USIM card. The second end of resistor R7 is connected to the common terminal of SIM1_DATA of USIM card and the second end of resistor R9.

[0112] The first terminal of TVS1 is connected to the common terminal of the second terminal of resistor R10 and SIM1_RST of the USIM card, the second terminal of TVS1 is connected to the common terminal of USIM_VDD of GPRS chip U2B and SIM1_VDD of the USIM card, and the third terminal of TVS1 is grounded.

[0113] The first terminal of TVS2 is connected to the common terminal of the second terminal of resistor R8 and SIM1_CLK of the USIM card. The second terminal of TVS1 is connected to the common terminal of the second terminal of resistor R9 and SIM1_DATA of the USIM card. The third terminal of TVS2 is grounded.

[0114] In one embodiment, refer to Figure 4 As shown, the GPRS module 205 also includes a first level conversion chip and a second level conversion chip;

[0115] The first level conversion chip U3 is connected to the GPRS chip U2C and the signal processor 204 respectively;

[0116] The second level conversion chip U7 is connected to the GPRS chip U2C and the signal processor 204 respectively.

[0117] The serial port pins of the GPRS chip U2C are converted by the first level conversion chip U3 and the second level conversion chip U7 to output U1TX and U1RX respectively. Figure 2 The UART connection of the signal processor 204 enables interactive communication.

[0118] The power-on startup process of the GPRS module 205 is described as follows: The signal processor 204 sends a reset pulse to the RESET_N pin of the GPRS chip through its IO port to reset the GPRS chip. The signal processor 204 sends a power-on pulse to the PWRKEY pin of the GPRS chip through its IO port to enter online mode. The GPRS module 205 sends an application signal to access the communication network registered by its USIM card through the main antenna ANT1 and receives an access success signal. The GPRS module 205 obtains the IP address of the network communication. The signal processor 204 sends a command through its UART communication port to query whether the GPRS module 205 has successfully accessed the communication network. The GPRS module 205 returns information to the signal processor 204 to confirm whether the access was successful. After successful access, the UART of the signal processor 204 can obtain the IP address of the remote device that needs to be connected to the network from the host computer 101 and send it to the GPRS module 205 to establish network communication with the remote device. The ground receiver 100 demodulates the downhole uploaded drilling information and sends it to the GPRS module 205 via the UART of the signal processor 204. This allows data to be transmitted to the IP-designated remote device, which receives downhole electromagnetic wave measurement-while-drilling instrument data in real time. This data can be displayed on the remote device in real time, completing the remote transmission of drilling information. Similarly, the IP-designated remote device can also send data to the GPRS module 205 of the ground receiver 100. The IP-designated remote device can send data including adjusting the amplification factor of the second-stage amplification unit 202, digital filter parameters, or signal demodulation method data to the GPRS module 205 of the ground receiver 100. The GPRS module 205 sends the data to the digital signal processor 204 to adjust the VGA amplifier performance, change the signal filter performance, or modify the demodulation method of the ground receiver 100 to optimize receiver performance and complete remote control of the ground receiver. This completes the remote transmission of downhole electromagnetic wave measurement-while-drilling instrument data and the function of receiving performance optimization data from the ground receiver from the remote device.

[0119] The signal processor 204 sends commands to the GPRS module 205 via its UART to query location information. The satellite positioning receiving antenna ANT2 of the GPRS module 205 can receive satellite geolocation signals and demodulate the location information, sending it to the signal processor 204. The signal processor 204 then sends the information to the host computer 101 for display. The electromagnetic wave drilling measurement ground system provided by this invention, especially the ground receiver, can upload received data to remote equipment and receive data from remote equipment, allowing for flexible configuration and optimization of the ground receiver's performance.

[0120] Example 2

[0121] This invention provides an application of the electromagnetic wave drilling measurement ground receiving system described in any of the above embodiments in electromagnetic wave drilling measurement.

[0122] Example 3

[0123] This invention provides a method for optimizing the performance parameters of an electromagnetic wave measurement while drilling ground receiving system, using the electromagnetic wave measurement while drilling ground receiving system described in any of the above embodiments.

[0124] In one embodiment, the method for optimizing the performance parameters of the electromagnetic wave measurement-while-drilling ground receiving system refers to... Figure 5 As shown, it includes:

[0125] S301, the ground receiver 100 receives the signal carrying drilling information transmitted by the downhole electromagnetic wave measurement instrument picked up by the receiving antenna, demodulates the signal to obtain the drilling information, and sends the drilling information to the host computer 101 or the remote device pointed to by the IP address configured on the ground receiver 100.

[0126] S302, the host computer 101 determines a first control signal based on the received drilling information and sends the first control signal to the ground receiver 100; or, the remote device determines a second control signal based on the received drilling information and sends the second control signal to the ground receiver 100.

[0127] S303, the ground receiver 100 receives the first control signal sent by the host computer 101 or the second control signal sent by the remote device, and optimizes the performance parameters of the ground receiver 100 in real time based on the first control signal or the second control signal.

[0128] The implementation method of the electromagnetic wave measurement while drilling ground receiving system performance parameter optimization method in the embodiments of the present invention can be referred to by those skilled in the art in the specific description of the electromagnetic wave measurement while drilling ground receiving system above, and will not be repeated here.

[0129] Example 4

[0130] Embodiments of the present invention also provide a computer-readable storage medium. The computer-readable storage medium stores a computer program, which, when executed by a processor, implements the steps of the method for optimizing the performance parameters of an electromagnetic wave measurement-while-drilling ground receiving system as described above.

[0131] The computer-readable storage medium may be included in the device / apparatus described in the above embodiments; or it may exist independently and not assembled into the device / apparatus. The computer-readable storage medium carries one or more programs that, when executed, implement the method according to the embodiments of the present invention.

[0132] According to embodiments of the present invention, the computer-readable storage medium may be a non-volatile computer-readable storage medium, such as including, but not limited to: portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof. In the present invention, the computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, apparatus, or device.

[0133] Example 5

[0134] This invention provides an electronic device, with reference to... Figure 6 As shown, it includes a processor 111, a communication interface 112, a memory 113, and a communication bus 114, wherein the processor 111, the communication interface 112, and the memory 113 communicate with each other through the communication bus 114.

[0135] Memory 113 is used to store computer programs;

[0136] In one embodiment of the present invention, when the processor 111 executes the program stored in the memory 113, it implements the steps of the electromagnetic wave drilling measurement ground receiving system performance parameter optimization method provided in any of the foregoing method embodiments.

[0137] The electronic device provided in this embodiment of the invention has a similar implementation principle and technical effect to the above embodiments, and will not be described again here.

[0138] The aforementioned memory 113 may be an electronic memory such as flash memory, EEPROM (Electrically Erasable Programmable Read-Only Memory), EPROM, hard disk, or ROM. Memory 113 has storage space for program code used to perform any of the method steps described above. For example, the storage space for program code may include individual program codes for implementing the various steps in the methods described above. This program code can be read from or written to one or more computer program products. These computer program products include program code carriers such as hard disks, optical discs (CDs), memory cards, or floppy disks. Such computer program products are typically portable or fixed storage units. The storage unit may have storage segments or storage spaces arranged similarly to the memory 113 in the aforementioned electronic device. The program code may, for example, be compressed in a suitable form. Typically, the storage unit includes programs for performing the method steps according to embodiments of the invention, i.e., code that can be read by a processor, which, when run by the electronic device, causes the electronic device to perform the various steps in the methods described above.

[0139] In this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, without necessarily requiring or implying any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. The terms "upper," "lower," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention.

[0140] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to interchangeably. Each embodiment focuses on its differences from other embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other. This invention is not limited to any single aspect, nor to any single embodiment, nor to any combination and / or substitution of these aspects and / or embodiments. Each aspect and / or embodiment of this invention can be used alone, or in combination with one or more other aspects and / or other embodiments.

[0141] Finally, it should be noted that the above-described embodiments are merely specific implementations of the present invention, used to illustrate the technical solutions of the present invention, and not to limit it. The scope of protection of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments within the technical scope disclosed in the present invention, or make equivalent substitutions for some of the technical features; and these modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A ground receiving system for electromagnetic wave measurement while drilling, characterized in that, include: Ground receiver, receiving antenna, host computer, and driller's display; The ground receiver is communicatively connected to the receiving antenna, the driller's display, and the host computer, respectively. The ground receiver is used to receive the signal carrying drilling information transmitted by the downhole electromagnetic wave measurement-while-drilling instrument picked up by the receiving antenna, demodulate the signal to obtain the drilling information, and send the drilling information to the host computer, the driller's display and the remote device pointed to by the IP address configured on the ground receiver. The host computer is used to determine a first control signal based on the received drilling information and send the first control signal to the ground receiver. The remote device is used to determine a second control signal based on the received drilling information and send the second control signal to the ground receiver. The ground receiver is also configured to receive the first control signal sent by the host computer, and optimize the performance parameters of the ground receiver in real time based on the first control signal; and to receive the second control signal sent by the remote device, and optimize the performance parameters of the ground receiver in real time based on the second control signal. The receiving antenna includes two electrodes: one electrode is a drilling frame, and the other electrode is a metal rod inserted into the formation. The two electrodes are connected to the input terminal of the ground receiver by wires. The metal rod constitutes the signal receiving antenna of the ground receiving system, and the drilling frame constitutes the ground receiving antenna ground. The ground receiver includes a signal processor; the signal processor is communicatively connected to the host computer and the remote device respectively, and is used to optimize the filtering coefficients and demodulation algorithm of the signal processor in real time according to the first control signal transmitted by the host computer or the second control signal transmitted by the remote device. The ground receiver also includes a first-stage amplification unit, a filtering unit, a second-stage amplification unit, and a driving unit; The signal processor includes an ADC module, a digital filter, and a demodulation module; One end of the ADC module is connected to the driving unit, and the other end is connected to the digital filter; the filter coefficients are optimized in the following way: The host computer or the remote device is used to determine the passband cutoff frequency, stopband cutoff frequency, maximum passband attenuation coefficient, and minimum stopband attenuation coefficient of the digital filter based on the frequency of the downhole electromagnetic wave transmission signal in the sampling sequence of the ADC module, and send the passband cutoff frequency, stopband cutoff frequency, maximum passband attenuation coefficient, and minimum stopband attenuation coefficient to the signal processor. The signal processor is used to determine the filtering coefficients based on the passband cutoff frequency, stopband cutoff frequency, passband maximum attenuation coefficient, and stopband minimum attenuation coefficient, and to control the digital filter to operate according to the filtering coefficients. The demodulation module is connected to the digital filter and is used to perform cross-correlation calculation between the output signal of the digital filter and the input symbol signal using the following formula to obtain the cross-correlation calculation result; the input symbol signal is obtained through the host computer or the remote device. ； in: For time delay; ; The results are from cross-correlation calculations; The output signal of the digital filter has a length of N; The input symbol signal has a length of M; If the cross-correlation calculation result does not reach the preset threshold, the output signal of the digital filter is shifted according to the next time delay until the cross-correlation calculation result reaches the preset threshold, and the symbol information in the output signal of the digital filter is obtained to obtain the drilling information.

2. The electromagnetic wave drilling measurement ground receiving system according to claim 1, characterized in that, The input terminal of the first-stage amplification unit is connected to the receiving antenna, the output terminal of the first-stage amplification unit is connected to the input terminal of the filtering unit, the output terminal of the filtering unit is connected to the input terminal of the second-stage amplification unit, the output terminal of the second-stage amplification unit is connected to the input terminal of the driving unit, the output terminal of the driving unit is connected to the input terminal of the signal processor, and the control terminal of the second-stage amplification unit is connected to the signal processor.

3. The electromagnetic wave drilling measurement ground receiving system according to claim 1, characterized in that, The ground receiver also includes a GPRS module; The GPRS module is connected to the signal processor and communicates with the host computer and the remote device respectively. It is used to send the first control signal sent by the host computer or the second control signal sent by the remote device to the signal processor, so that the signal processor adjusts the amplification coefficient of the second stage amplification unit, the filtering parameters of the filtering unit, the filtering coefficient of the digital filter, and the demodulation algorithm of the demodulation module according to the first control signal or the second control signal.

4. The electromagnetic wave drilling measurement ground receiving system according to claim 3, characterized in that, The GPRS module includes a first antenna, a second antenna, a first matching circuit, a second matching circuit, and a GPRS chip; The first antenna is used to receive and transmit network data signals, and the second antenna is used to receive satellite positioning information data; The first antenna is connected to the GPRS chip through the first matching circuit, and the second antenna is connected to the GPRS chip through the second matching circuit.

5. The electromagnetic wave drilling measurement ground receiving system according to claim 4, characterized in that, The GPRS module further includes a first driving circuit and a second driving circuit. One end of the first driving circuit is connected to the signal processor, and the other end is connected to the GPRS chip; One end of the second driving circuit is connected to the signal processor, and the other end is connected to the GPRS chip.

6. The electromagnetic wave measurement-while-drilling ground receiving system according to claim 5, characterized in that, The GPRS module also includes a USIM module; The USIM module is connected to the GPRS chip.

7. The electromagnetic wave drilling measurement ground receiving system according to claim 5, characterized in that, The GPRS module also includes a first level conversion chip and a second level conversion chip; The first level conversion chip is connected to the GPRS chip and the signal processor respectively; The second level conversion chip is connected to both the GPRS chip and the signal processor.

8. The electromagnetic wave measurement-while-drilling ground receiving system according to claim 2, characterized in that, The second-stage amplification unit is a VGA amplifier.

9. The application of the electromagnetic wave measurement-while-drilling ground receiving system as described in any one of claims 1-8 in electromagnetic wave measurement-while-drilling.

10. A method for optimizing the performance parameters of a ground receiving system for electromagnetic wave measurement while drilling, characterized in that, Use the electromagnetic wave measurement while drilling ground receiving system as described in any one of claims 1-8.

11. The method for optimizing the performance parameters of the electromagnetic wave drilling measurement ground receiving system according to claim 10, characterized in that, include: The ground receiver receives the signal carrying drilling information from the downhole electromagnetic wave measurement instrument, which is picked up by the receiving antenna, and demodulates the signal to obtain the drilling information. The drilling information is then sent to the remote device pointed to by the IP address configured on the host computer or the ground receiver. The host computer determines a first control signal based on the received drilling information and sends the first control signal to the ground receiver; or, the remote device determines a second control signal based on the received drilling information and sends the second control signal to the ground receiver. The ground receiver receives the first control signal sent by the host computer or the second control signal sent by the remote device, and optimizes the performance parameters of the ground receiver in real time based on the first control signal or the second control signal.

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