Low power consumption and high resolution dynamic tool face detection device and method

Abstract

The present invention provides a low-power, high-resolution dynamic tool face detection device, which includes: a first processor, which is used to calculate the minimum acquisition cycle required to complete the acquisition of all raw data, and determine the acquisition timing of the raw data. After the acquisition enable signal is turned on, the raw data is acquired according to the minimum acquisition cycle and the acquisition timing; a second processor, which is embedded in the first processor as a core, is used to control the start and stop of the acquisition enable signal, and processes the raw data after receiving the raw data to obtain the detection result of the dynamic tool face. The low-power, high-resolution dynamic tool face detection device and method provided by the present invention can improve the imaging resolution of the while-drilling imaging logging instrument; and the present invention has functional scalability, can be used as the development basis of the while-drilling imaging logging instrument, and can also be transplanted to mature instruments to directly improve their imaging resolution.

Description

Technical Field

[0001] The invention relates to the technical field of logging while drilling instruments, and in particular to a low-power consumption and high-resolution dynamic tool face detection device and method. Background Art

[0002] Logging while drilling (LWD) instruments are a key means of efficient development of unconventional and complex oil and gas reservoirs. Logging while drilling (LWD) instruments have directional information that conventional LWD (Logging While Drilling) instruments do not have. They can provide imaging measurements of geological parameters such as resistivity and gamma, and provide a detailed description of the formation, which can effectively improve the drilling rate. At present, the imaging resolution of high-end LWD instruments developed abroad can reach 128 sectors.

[0003] Generally speaking, the imaging process of the while-drilling imaging logging instrument requires the drilling tool to rotate and scan the well wall formation to perform dynamic tool face detection, thereby realizing sector division. Therefore, the detection resolution of the dynamic tool face directly affects the imaging resolution of the imaging logging instrument and is a key factor in while-drilling high-definition imaging.

[0004] Therefore, the present invention provides a low-power consumption and high-resolution dynamic tool face detection device and method. Summary of the invention

[0005] In order to solve the above problems, the present invention provides a low-power consumption and high-resolution dynamic tool face detection device, the device comprising:

[0006] A first processor is used to calculate the minimum acquisition period required to complete the acquisition of all raw data and determine the acquisition timing of the raw data, and after the acquisition enable signal is turned on, acquire the raw data according to the minimum acquisition period and the acquisition timing;

[0007] The second processor is embedded in the first processor as a core, and is used to control the start and stop of the acquisition enable signal, and processes the raw data after receiving the raw data to obtain the detection result of the dynamic tool face.

[0008] According to one embodiment of the present invention, the first processor comprises:

[0009] A collection cycle setting module, which is used to set a single collection cycle after the second processor receives a configuration signal from a ground host computer, wherein the single collection cycle includes a minimum collection cycle and a collection interval, and the first processor completes collection within the minimum collection cycle and does not collect data within the collection interval;

[0010] A timing module, which is used to determine the acquisition timing of the raw data and solidify the acquisition timing in the first processor, wherein the acquisition timing includes the acquisition time and acquisition order of each sensor;

[0011] The acquisition module is used to control the sensor to acquire the raw data according to the minimum acquisition period and the acquisition timing after the acquisition enable signal is turned on.

[0012] According to an embodiment of the present invention, the sensor includes: an accelerometer, a fluxgate and a gyroscope.

[0013] According to one embodiment of the present invention, the second processor comprises:

[0014] A configuration module is connected to the ground host computer and is used to receive a configuration signal generated by the ground host computer according to the imaging resolution requirements and working conditions of the on-site construction to complete the configuration of the acquisition frequency, continuous acquisition time and idle waiting time;

[0015] An acquisition control module, which is used to set a single acquisition cycle of the first processor according to the configured acquisition frequency, and control the start and stop of the acquisition enable signal of the first processor according to the continuous acquisition time and the idle waiting time;

[0016] The processing module is used to filter and smooth the collected raw data to obtain a calculation result.

[0017] According to one embodiment of the present invention, the calculation results include: well deviation results, azimuth results, gravity tool face results and magnetic tool face results.

[0018] According to one embodiment of the present invention, the device further comprises:

[0019] An analog-to-digital converter is connected to the sensor and the first processor, and is used for performing analog-to-digital conversion on the original signal collected by the sensor and then sending the converted signal to the first processor.

[0020] According to one embodiment of the present invention, the device further comprises:

[0021] A watchdog is connected to the second processor and is used for restarting when a program in the second processor runs away or falls into an infinite loop.

[0022] According to one embodiment of the present invention, the device further comprises:

[0023] A crystal oscillator is connected to the first processor and is used to provide a reference clock when the first processor and the second processor are running.

[0024] According to one embodiment of the present invention, the device further comprises:

[0025] A power supply is connected to the first processor and is used to provide energy for the operation of the first processor and the second processor.

[0026] According to another aspect of the present invention, there is also provided a low-power consumption and high-resolution dynamic tool face detection method, wherein the dynamic tool face detection is performed by using the device as described in any one of the above items, and the method comprises the following steps:

[0027] Calculating the minimum acquisition period required to complete the acquisition of all raw data, and determining the acquisition timing of the raw data;

[0028] The acquisition enable signal is started and stopped according to the continuous acquisition time and idle waiting time configured by the ground host computer. After the acquisition enable signal is turned on, periodic acquisition is performed according to the acquisition frequency configured by the ground host computer. The raw data is acquired according to the minimum acquisition cycle and the fixed acquisition timing within the set single acquisition cycle;

[0029] After receiving the raw data, the raw data is processed to obtain a detection result of the dynamic tool face.

[0030] The low-power, high-resolution dynamic tool face detection device and method provided by the present invention can improve the imaging resolution of a while-drilling imaging logging instrument; and the present invention has functional scalability, can serve as a development basis for while-drilling imaging logging instruments, and can also be transplanted to mature instruments to directly improve their imaging resolution.

[0031] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0033] Figure 1 A structural block diagram of a low-power and high-resolution dynamic tool face detection device according to an embodiment of the present invention is shown;

[0034] Figure 2 Shows a structural block diagram of a low-power, high-resolution dynamic tool face detection device according to another embodiment of the present invention;

[0035] Figure 3A flow chart of a low-power and high-resolution dynamic tool face detection method according to an embodiment of the present invention is shown; and

[0036] Figure 4 A flow chart of a low-power and high-resolution dynamic tool face detection method according to another embodiment of the present invention is shown. DETAILED DESCRIPTION

[0037] To make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention are further described in detail below with reference to the accompanying drawings.

[0038] Figure 1 A structural block diagram of a low-power and high-resolution dynamic tool face detection device according to an embodiment of the present invention is shown.

[0039] like Figure 1 The dynamic tool face detection device 100 includes a first processor 101 and a second processor 102. The second processor 102 is embedded in the first processor 101 as a core, which can reduce the overall power consumption of the dynamic tool face detection device 100.

[0040] Specifically, the first processor 101 is used to calculate the minimum acquisition period required to complete the acquisition of all raw data and determine the acquisition timing of the raw data. After the acquisition enable signal is turned on, the raw data is acquired according to the minimum acquisition period and the acquisition timing.

[0041] Specifically, the second processor 102 is embedded in the first processor as a core, and is used to control the start and stop of the acquisition enable signal, and processes the raw data after receiving the raw data to obtain the detection result of the dynamic tool face.

[0042] In one embodiment, the first processor includes a collection cycle setting module, a timing module and a collection module. Specifically:

[0043] The acquisition cycle setting module is used to set a single acquisition cycle after the second processor receives the configuration signal from the ground host computer. The single acquisition cycle includes a minimum acquisition cycle and an acquisition interval. The first processor completes the acquisition within the minimum acquisition cycle and does not perform acquisition within the acquisition interval.

[0044] The timing module is used to determine the acquisition timing of the original data and solidify the acquisition timing in the first processor, wherein the acquisition timing includes the acquisition time and acquisition order of each sensor.

[0045] The acquisition module is used to control the sensor to acquire raw data according to the minimum acquisition cycle and acquisition timing after the acquisition enable signal is turned on.

[0046] In one embodiment, the sensor 103 includes an accelerometer 1031 , a fluxgate 1032 , and a gyroscope 1033 .

[0047] In one embodiment, the second processor includes a configuration module, an acquisition control module and a processing module. Specifically:

[0048] The configuration module is connected to the ground host computer and is used to receive the configuration signal generated by the ground host computer according to the imaging resolution requirements and working conditions of the on-site construction, so as to complete the configuration of the acquisition frequency, continuous acquisition time and idle waiting time.

[0049] The acquisition control module is used to set a single acquisition cycle of the first processor according to the configured acquisition frequency, and to control the start and stop of the acquisition enable signal of the first processor according to the continuous acquisition time and the idle waiting time.

[0050] The processing module is used to filter and smooth the collected raw data to obtain the calculation results.

[0051] In one embodiment, the calculation results include: well deviation results, azimuth results, gravity tool face results, and magnetic tool face results.

[0052] The acquisition cycle of raw data affects the resolution of dynamic tool face detection, and the continuous acquisition time affects the detection accuracy. The shorter the acquisition cycle, the longer the continuous acquisition time, and the more acquisition times, the higher the dynamic tool face detection resolution and accuracy. The configuration module can be connected to the ground host computer (such as a PC) for parameter configuration before the dynamic tool face detection device 100 enters the well according to the imaging resolution requirements and working conditions during on-site construction, so as to achieve dynamic adjustment of detection resolution and accuracy.

[0053] In one embodiment, the dynamic tool face detection device further comprises: an analog-to-digital converter 104, which is connected to the sensor and the first processor and is used to perform analog-to-digital conversion on the original signal collected by the sensor and then send the result to the first processor.

[0054] In one embodiment, the dynamic tool face detection device further comprises: a watchdog 105, which is connected to the second processor and is used to restart when the program in the second processor runs away or falls into an infinite loop.

[0055] In one embodiment, the dynamic tool face detection device further comprises: a crystal oscillator 106, which is connected to the first processor and is used to provide a reference clock when the first processor and the second processor are running.

[0056] In one embodiment, the dynamic tool face detection device further comprises: a power supply 107 connected to the first processor and used to provide energy for the operation of the first processor and the second processor.

[0057] In the present invention, the second processor is embedded in the first processor as a core, and the operation of the core is realized, thereby integrating two hardware circuits for high-speed signal acquisition and calculation into the hardware circuit based on the first processor, which can greatly reduce system power consumption.

[0058] Figure 2 A structural block diagram of a low-power and high-resolution dynamic tool face detection device according to another embodiment of the present invention is shown.

[0059] like Figure 2 As shown, the first processor uses FPGA, the second processor uses MCU, the analog-to-digital converter is an AD chip, and the sensor includes an accelerometer, a fluxgate, and a gyroscope. The dynamic tool face detection device is connected to the ground host computer through a configuration bus. The power supply and the crystal oscillator are respectively connected to the first processor, and the watchdog is connected to the second processor.

[0060] The dynamic tool face detection device of the present invention detects the dynamic tool face as the drill bit rotates, and is used for imaging measurement of geological parameters such as resistivity and gamma. It is mainly composed of FPGA, power supply, crystal oscillator, watchdog, sensor (accelerometer, fluxgate, gyroscope), AD chip, peripheral circuit, etc.

[0061] Specifically, the control and processing core is FPGA. The power supply provides energy to the system to ensure the normal operation of the dynamic tool face detection device. The crystal oscillator provides a reference clock for the operation of the dynamic tool face detection device. The watchdog can restart the system when the program in the second processor runs away or falls into an infinite loop to ensure the orderly operation of the system functions. Sensors such as accelerometers, flux gates, and gyroscopes are used to collect raw measurement signals. The acquisition cycle and timing of different sensors are controlled by FPGA. The AD chip converts the raw data collected by the sensor into analog-to-digital data, and the FPGA reads the corresponding data for subsequent processing. Peripheral circuit ( Figure 2 The auxiliary system (not shown) is used for signal processing, etc., to complete the acquisition and processing of the original measurement signal.

[0062] In the present invention, FPGA has a very high data processing speed, which can increase the frequency of raw signal acquisition, and then improve the detection resolution of the dynamic tool face. However, FPGA cannot realize the calculation and processing of large-capacity data. After completing the high-speed acquisition of raw data, the raw data still needs to be filtered and calculated to obtain parameters such as well inclination, azimuth, gravity tool face, magnetic tool face, etc., so as to obtain the detection results of the dynamic tool face.

[0063] Therefore, in the present invention, the second processor is embedded in the first processor as the core and the operation of the core is realized, thereby integrating two hardware circuits for high-speed signal acquisition and calculation into the hardware circuit based on the first processor, which can greatly reduce system power consumption.

[0064] Figure 3 A flow chart of a low-power and high-resolution dynamic tool face detection method according to an embodiment of the present invention is shown. Specifically, dynamic tool face detection is performed by using a low-power and high-resolution dynamic tool face detection device as described in any one of the above items.

[0065] like Figure 3 In step S301, the minimum acquisition period required to complete the acquisition of all raw data is calculated, and the acquisition timing of the raw data is determined.

[0066] Specifically, the second processor sets a single acquisition cycle after receiving the configuration signal from the ground host computer. The acquisition cycle is greater than or equal to the minimum acquisition cycle. The first processor completes the acquisition within the minimum acquisition cycle and does not perform acquisition during the remaining time of the single acquisition cycle minus the minimum acquisition cycle. The single acquisition cycle directly affects and restricts the measurement and calculation accuracy of the dynamic tool face.

[0067] Specifically, the acquisition timing is solidified in the first processor, wherein the acquisition timing includes the acquisition time and acquisition sequence of each sensor. The sensors include: an accelerometer, a fluxgate, and a gyroscope.

[0068] like Figure 3 In step S302, the acquisition enable signal is started and stopped according to the continuous acquisition time and idle waiting time configured by the ground host computer. After the acquisition enable signal is turned on, periodic acquisition is performed according to the acquisition frequency configured by the ground host computer. The original data is acquired within the set single acquisition cycle according to the minimum acquisition cycle and the fixed acquisition timing.

[0069] Specifically, after the acquisition enable signal is turned on, the control sensor acquires the raw data according to the minimum acquisition cycle and acquisition timing. According to the imaging resolution requirements and working conditions during on-site construction, the acquisition cycle, continuous acquisition time and idle waiting time of the dynamic tool face detection device can be configured before it enters the well to achieve dynamic adjustment of detection resolution and accuracy.

[0070] like Figure 3 In step S303, after receiving the raw data, the raw data is processed to obtain the detection result of the dynamic tool face.

[0071] Specifically, the collected raw data is filtered and smoothed to obtain calculation results, which include: well deviation results, azimuth results, gravity tool face results, and magnetic tool face results.

[0072] Figure 4 A flow chart of a low-power and high-resolution dynamic tool face detection method according to another embodiment of the present invention is shown.

[0073] In order to realize the computational processing of collected data, further reduce system power consumption, increase the service life of batteries underground to improve production efficiency, the implementation method of the low-power and high-resolution dynamic tool face detection device includes the following steps:

[0074] 1) Implement the hardware circuit of the dynamic tool face detection device according to the designed hardware architecture. Figure 1 as well as Figure 2 The hardware circuit of the present invention is designed to realize the detection of dynamic tool face.

[0075] 2) Functional verification and testing of each module of the hardware circuit. Specifically, after the hardware circuit is designed, each module needs to be functionally verified and tested to ensure the normal operation of the hardware circuit.

[0076] 3) After passing the performance test, the MCU kernel is embedded in the FPGA and the kernel is run, thereby integrating the two hardware circuits for high-speed signal acquisition and calculation into the hardware circuit based on the FPGA, which can greatly reduce the power consumption of the system. Specifically, the present invention embeds the second processor, here the MCU is selected, into the first processor, which can reduce the data processing pressure of the first processor, and improve the efficiency of the system while reducing the power consumption of the system.

[0077] 4) Calculate the minimum acquisition cycle required to complete the acquisition of all raw data, and design the acquisition timing of the sensor to collect raw data. FPGA can realize high-speed acquisition of multiple sensor signals based on the acquisition timing and control process. Specifically, to collect raw data, it is necessary to first design the acquisition time and acquisition sequence of each sensor to obtain the acquisition timing of the raw signal.

[0078] 5) Perform filtering and smoothing of the collected signals on the MCU core, and calculate parameters such as well inclination, azimuth, gravity tool face, magnetic tool face, etc. Specifically, the second processor undertakes the tasks of high-speed processing and high-speed calculation, and performs filtering and smoothing on the collected raw data to obtain calculation results such as well inclination, azimuth, gravity tool face, magnetic tool face, etc., so as to further obtain the detection results of the dynamic tool face.

[0079] 6) After the MCU core completes signal processing and calculation, the system configuration function is realized. The parameters can be configured by the PC through the communication bus, and the FPGA controls the acquisition of the original measurement signal according to the configured signal acquisition cycle and continuous acquisition time.

[0080] Specifically, the acquisition cycle affects the resolution of dynamic tool face detection, and the continuous acquisition time affects the detection accuracy. The shorter the acquisition cycle, the longer the continuous acquisition time, and the more acquisition times, the higher the dynamic tool face detection resolution and accuracy. According to the imaging resolution requirements and working conditions during on-site construction, the dynamic tool face detection device can be parameterized through the PC before entering the well to achieve dynamic adjustment of the detection resolution and accuracy of the dynamic tool face detection device.

[0081] 7) Functional testing of dynamic tool face detection system configuration, signal acquisition, parameter calculation, etc.

[0082] In summary, the low-power and high-resolution dynamic tool face detection device and method provided by the present invention can improve the imaging resolution of the while-drilling imaging logging instrument; and the present invention has functional scalability, can be used as the development basis of the while-drilling imaging logging instrument, and can also be transplanted to mature instruments to directly improve their imaging resolution.

[0083] It should be understood that the embodiments disclosed in the present invention are not limited to the specific structures, processing steps or materials disclosed herein, but should be extended to equivalent substitutions of these features understood by ordinary technicians in the relevant field. It should also be understood that the terms used herein are only used for the purpose of describing specific embodiments and are not meant to be limiting.

[0084] The "one embodiment" or "embodiment" mentioned in the specification means that the specific features, structures or characteristics described in conjunction with the embodiment are included in at least one embodiment of the present invention. Therefore, the phrases "one embodiment" or "embodiment" appearing in various places throughout the specification do not necessarily refer to the same embodiment.

[0085] Although the embodiments disclosed in the present invention are as above, the contents described are only embodiments adopted for facilitating the understanding of the present invention and are not intended to limit the present invention. Any technician in the technical field to which the present invention belongs can make any modifications and changes in the form and details of the implementation without departing from the spirit and scope disclosed in the present invention, but the patent protection scope of the present invention shall still be subject to the scope defined in the attached claims.

Claims

1. A low-power and high-resolution dynamic tool face detection device, characterized in that: The device comprises: A first processor is used to calculate the minimum acquisition period required to complete the acquisition of all raw data and determine the acquisition timing of the raw data, and after the acquisition enable signal is turned on, acquire the raw data according to the minimum acquisition period and the acquisition timing; A second processor, which is embedded in the first processor as a core, is used to control the start and stop of the acquisition enable signal, and processes the raw data after receiving the raw data to obtain a detection result of the dynamic tool face; The first processor includes: a collection cycle setting module, which is used to set a single collection cycle after the second processor receives a configuration signal from a ground host computer, wherein the single collection cycle includes a minimum collection cycle and a collection interval, and the first processor completes collection within the minimum collection cycle and does not collect data within the collection interval; A timing module, which is used to determine the acquisition timing of the raw data and solidify the acquisition timing in the first processor, wherein the acquisition timing includes the acquisition time and acquisition order of each sensor; An acquisition module, which is used to control the sensor to acquire the raw data according to the minimum acquisition period and the acquisition timing after the acquisition enable signal is turned on; The second processor includes: a configuration module, which is connected to the ground host computer and is used to receive a configuration signal generated by the ground host computer according to the imaging resolution requirements and working conditions of the on-site construction to complete the configuration of the acquisition frequency, continuous acquisition time and idle waiting time; An acquisition control module, which is used to set a single acquisition cycle of the first processor according to the configured acquisition frequency, and control the start and stop of the acquisition enable signal of the first processor according to the continuous acquisition time and the idle waiting time; The processing module is used to filter and smooth the collected raw data to obtain a calculation result.

2. The low-power and high-resolution dynamic tool face detection device according to claim 1, characterized in that: The sensor includes an accelerometer, a fluxgate and a gyroscope.

3. The low-power and high-resolution dynamic tool face detection device according to claim 1, characterized in that: The calculation results include: well deviation results, azimuth results, gravity tool face results and magnetic tool face results.

4. The low-power and high-resolution dynamic tool face detection device according to claim 1, characterized in that: The device also comprises: An analog-to-digital converter is connected to the sensor and the first processor, and is used for performing analog-to-digital conversion on the original signal collected by the sensor and then sending the converted signal to the first processor.

5. The low-power and high-resolution dynamic tool face detection device according to claim 1, characterized in that: The device also comprises: A watchdog is connected to the second processor and is used for restarting when a program in the second processor runs away or falls into an infinite loop.

6. The low-power and high-resolution dynamic tool face detection device according to claim 1, characterized in that: The device also comprises: A crystal oscillator is connected to the first processor and is used to provide a reference clock when the first processor and the second processor are running.

7. The low-power and high-resolution dynamic tool face detection device according to claim 1, characterized in that: The device also comprises: A power supply is connected to the first processor and is used to provide energy for the operation of the first processor and the second processor.

8. A low-power and high-resolution dynamic tool face detection method, characterized in that: Dynamic tool face detection is performed by the device according to any one of claims 1 to 7, the method comprising the following steps: Calculating the minimum acquisition period required to complete the acquisition of all raw data, and determining the acquisition timing of the raw data; The acquisition enable signal is started and stopped according to the continuous acquisition time and idle waiting time configured by the ground host computer. After the acquisition enable signal is turned on, periodic acquisition is performed according to the acquisition frequency configured by the ground host computer. The raw data is acquired according to the minimum acquisition cycle and the fixed acquisition timing within the set single acquisition cycle; After receiving the raw data, the raw data is processed to obtain a detection result of the dynamic tool face.

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