Logging instrument and method and computer readable storage medium

Abstract

The invention discloses a logging instrument and method and a computer readable storage medium, and relates to the field of logging, the logging instrument is internally provided with a switch module, a battery short section, a multifunctional storage short section and a neutron short section, and the logging instrument can receive a first control signal transmitted by an upper computer on the ground; the switch module transmits electric energy of the battery short section to the multifunctional storage short section or the neutron short section according to a first control signal under the well, and the multifunctional storage short section collects and stores a magnetic positioning signal and / or a well temperature signal and / or a gamma signal according to the first control signal after being powered on. When the logging instrument returns to the ground again, if a second control signal transmitted by the upper computer is received, the stored data is transmitted to the upper computer, transmission of the data and the electric energy can be completed without arranging a cable, and the logging instrument is convenient to use. And even in a highly-deviated well and a horizontal well, the well logging task can be accurately completed.

Description

Technical Field

[0001] This invention relates to the field of well logging, and particularly to a well logging instrument, method, and computer-readable storage medium. Background Technology

[0002] After an oil well is put into production, its output will change with the formation saturation; oil and gas production will decrease, while water cut will increase significantly. Timely monitoring of oil saturation in the wellbore and using logging analysis to determine the next production steps becomes crucial. Furthermore, because casing is installed and cemented before oil well production, the physical characteristics of casing limit the application of many logging methods used in open-hole wells, making them unsuitable for formation evaluation. Currently, in oilfield production logging, neutron logging is the primary method for monitoring oil saturation. Neutron logging is a logging method not limited by casing or tubing and is mainly used to delineate oil, gas, and water layers, locate missed interpretations of oil and gas layers, determine oil-gas-water interface migration, evaluate the effectiveness of water-flooded layer sealing, and measure remaining oil and residual oil saturation. It is an important logging tool during oilfield development.

[0003] In existing technologies, the logging instruments used are generally direct-reading logging instruments. A direct-reading PNN (Pulse Neutron-Netron) logging instrument consists of a PNN telemetry sub, a PNN gamma sub, a PNN neutron detection sub, and a PNN neutron generator sub. The direct-reading PNN logging instrument is connected to a cable via a bridle. The PNN logging surface system supplies power to the downhole instrument via the cable, enabling bidirectional communication and real-time control of the downhole instrument's operating mode and acquisition of logging data. In vertical wells and wells with low deflection, gravity allows the instrument to be easily lowered to the bottom of the well via cable. Under these conditions, direct-reading PNN logging instruments can complete the logging task. However, with advancements in drilling technology, many high-deflection and horizontal wells are becoming increasingly common. Ordinary cables cannot be used to lower the instrument to the bottom of the oil well, making it impossible to use direct-reading PNN logging instruments to complete the logging task. Summary of the Invention

[0004] The purpose of this invention is to provide a logging instrument, method, and computer-readable storage medium. The logging instrument provided by this solution is powered by an internal battery stub, and the logging instrument is configured in advance on the surface to perform working mode, collect and store data downhole, and when it returns to the surface, if connected to a host computer, the stored data is transmitted to the host computer. Data transmission and power transmission can be completed without the need for cables, and logging tasks can be accurately completed even in highly deviated wells and horizontal wells.

[0005] To solve the above-mentioned technical problems, the present invention provides a logging instrument, including: a switch module, a battery sub, a multi-functional storage sub, and a neutron sub. When the logging instrument is located on the ground, the common terminal of the host computer, the switch module, the battery sub, the multi-functional storage sub, and the neutron sub is connected to the ground.

[0006] The power supply input terminal of the switch module is connected to the battery stub, the power supply output terminal is connected to the battery stub, and the control input terminal is connected to the host computer. It is used to receive the first control signal transmitted by the host computer when the logging instrument is on the ground, and after receiving the initial power transmitted by the battery stub, select to transmit the initial power through the battery stub to the multi-functional storage stub and / or the neutron stub based on the first control signal.

[0007] The control input terminal of the battery stub is connected to the control output terminal of the switch module, and the control output terminal is connected to the control terminal of the multi-functional storage stub, for transmitting the first control signal to the multi-functional storage stub, and transmitting the initial electrical energy to the switch module based on the control of the first control signal;

[0008] The signal output terminal of the multifunctional storage sub is connected to the neutron sub, the signal receiving terminal is connected to the neutron sub, the power supply input terminal is connected to the battery sub, and the power supply output terminal is connected to the neutron sub. It is used to detect and store magnetic positioning signals and / or well temperature signals and / or gamma signals based on the first control signal after receiving the initial electrical energy, and to transmit a target trigger signal to the neutron sub. It processes the far-field and near-field neutron detection signals detected by the neutron sub, and stores the processed far-field and near-field neutron signals based on the first control signal. When the logging instrument is located on the ground and receives the second control signal transmitted by the host computer, it sequentially transmits the stored magnetic positioning signals and / or well temperature signals and / or gamma signals and / or far-field and near-field neutron signals to the host computer through the battery sub and the switching module.

[0009] Optionally, the multifunctional storage section includes: a USB communication circuit, a first power supply circuit, a data storage circuit, a magnetic positioning processing circuit, a well temperature processing circuit, a gamma circuit, a microcontroller circuit, a neutron far-field probe processing circuit, a neutron near-field probe processing circuit, a magnetic positioning probe, a well temperature probe, a gamma probe, and a target-triggered pulse transmission circuit.

[0010] One end of the first power supply circuit is connected to the battery short segment, and the other end is connected to the ground wire, the USB communication circuit, the microcontroller circuit, the data storage circuit, the magnetic positioning processing circuit, the well temperature processing circuit, the gamma circuit, the magnetic positioning probe, the well temperature probe, the gamma probe, and the target trigger pulse sending circuit, respectively, to convert the initial electrical energy into the working electrical energy corresponding to the USB communication circuit, the microcontroller circuit, the data storage circuit, the magnetic positioning processing circuit, the well temperature processing circuit, the gamma circuit, the magnetic positioning probe, the well temperature probe, the gamma probe, and the target trigger pulse sending circuit;

[0011] The USB communication circuit is connected to the microcontroller circuit and the host computer respectively, and is used to transmit the first control signal to the microcontroller circuit.

[0012] The microcontroller circuit is connected to the data storage circuit, the magnetic positioning processing circuit, the well temperature processing circuit, the gamma circuit, and the target trigger pulse sending circuit, respectively. It is used to transmit the magnetic positioning signal transmitted by the magnetic positioning processing circuit and / or the well temperature signal transmitted by the well temperature processing circuit and / or the gamma signal transmitted by the gamma circuit to the data storage circuit based on the control of the first control signal. It also controls the target trigger pulse sending circuit to send the target trigger signal to the neutron sub-node based on the first control signal, converts the processed far-neutron detection signal transmitted by the far-neutron probe processing circuit and the processed near-neutron detection signal transmitted by the near-neutron probe processing circuit into far-near neutron signals, and transmits these far-near neutron signals to the data storage circuit based on the control of the first control signal.

[0013] The magnetic positioning processing circuit is connected to the magnetic positioning probe and is used to convert the magnetic positioning probe signal detected by the magnetic positioning probe into the magnetic positioning signal;

[0014] The well temperature processing circuit is connected to the well temperature probe and is used to convert the well temperature probe signal detected by the well temperature probe into the well temperature signal.

[0015] The gamma circuit is connected to the gamma probe and is used to convert the gamma probe signal detected by the gamma probe into the gamma signal;

[0016] The neutron remote probe processing circuit is connected to the microcontroller circuit and the neutron stub respectively, and is used to process the remote neutron detection signal transmitted by the neutron stub;

[0017] The neutron near-probe processing circuit is connected to the microcontroller circuit and the neutron sub-section, respectively, and is used to process the near-neutron detection signal transmitted by the neutron sub-section.

[0018] Optionally, the multi-functional storage section further includes:

[0019] The first LC filter circuit is connected in series between the first power supply circuit and the ground wire, and is used to filter the working power corresponding to the USB communication circuit, the microcontroller circuit, the data storage circuit, the magnetic positioning processing circuit, the well temperature processing circuit, the gamma circuit, the magnetic positioning probe, the well temperature probe, the gamma probe and the target trigger pulse sending circuit.

[0020] Optionally, the neutron subsection includes: a neutron detection subsection and a neutron generator subsection;

[0021] The power supply input terminal of the neutron detection section is connected to the multifunctional storage section, the power supply output terminal is connected to the neutron generator section, the neutron signal output terminal is connected to the multifunctional storage section, and the target trigger signal output terminal is connected to the neutron generator section. These terminals are used to send the target trigger signal to the neutron generator section after receiving the initial electrical energy, so that the neutron generator section emits neutrons and transmits the detected far-field neutron detection signal and near-field neutron detection signal to the multifunctional storage section.

[0022] Optionally, the neutron detection section includes: a second power supply circuit, a neutron signal processing circuit, a neutron high voltage circuit, a neutron near detector, and a neutron far detector;

[0023] One end of the second power supply circuit is connected to the multi-functional storage stub, and the other end is connected to the ground wire, the neutron signal processing circuit, and the neutron high voltage circuit, respectively, for converting the initial electrical energy into the working electrical energy corresponding to the neutron signal processing circuit and the neutron high voltage circuit;

[0024] The neutron high voltage circuit is connected to the neutron near detector and the neutron far detector respectively, and is used to transmit preset power to the neutron near detector and the neutron far detector respectively after receiving its own corresponding working power, so as to enable the neutron near detector and the neutron far detector to work normally. The voltage corresponding to the preset power is greater than the first voltage threshold.

[0025] The neutron signal processing circuit is connected to the multifunctional storage section, the near-neutron detector, the far-neutron detector, and the neutron generator section, respectively. It is used to send the target trigger signal to the neutron generator section, process the far-neutron detector signal detected by the far-neutron detector and the near-neutron detector signal detected by the near-neutron detector, and transmit the processed far-neutron detection signal and near-neutron detection signal to the multifunctional storage section.

[0026] Optionally, the neutron detection sub-section further includes:

[0027] The second LC filter circuit is connected in series between the second power supply circuit and the ground wire, and is used to filter the working power corresponding to the neutron signal processing circuit and the neutron high voltage circuit.

[0028] Optionally, the neutron generator section includes: a third power supply circuit, a high voltage generation circuit, a high voltage discharge circuit, and a neutron tube;

[0029] One end of the third power supply circuit is connected to the neutron detector section, and the other end is connected to the ground wire and the high-voltage discharge circuit respectively, and is used to convert the initial electrical energy into the working electrical energy corresponding to the high-voltage discharge circuit.

[0030] The high-voltage generating circuit is connected to the neutron detection subsection and is used to operate after receiving the initial electrical energy and the target trigger signal.

[0031] The high-voltage discharge circuit is connected to the neutron detection subsection and is used to operate after receiving its corresponding working power and the target trigger signal.

[0032] The neutron tube is connected to the high-voltage generating circuit and the high-voltage discharging circuit respectively, and is used to emit the neutron when a preset negative pulse generated by the high-voltage generating circuit and the high-voltage discharging circuit is received. The voltage corresponding to the preset negative pulse is greater than a second voltage threshold.

[0033] Optionally, the neutron generator section further includes:

[0034] The third LC filter circuit is connected in series between the third power supply circuit and the ground wire, and is used to filter the working power corresponding to the high-voltage discharge circuit.

[0035] To address the aforementioned technical problems, this invention also provides a logging method applied to a logging instrument, the logging instrument comprising: a switch module, a battery sub, a multi-functional storage sub, and a neutron sub; the method comprising:

[0036] When the logging instrument is on the ground, the switch module receives the first control signal transmitted by the host computer, and after receiving the initial electrical energy transmitted by the battery sub, selects to transmit the initial electrical energy through the battery sub to the multi-functional storage sub and / or the neutron sub based on the first control signal;

[0037] The first control signal is transmitted to the multi-functional storage segment using the battery segment, and the initial electrical energy is transmitted to the switching module based on the control of the first control signal;

[0038] After receiving the initial electrical energy, the multi-functional storage sub detects and stores magnetic positioning signals and / or well temperature signals and / or gamma signals based on the first control signal, and transmits a target trigger signal to the neutron sub. It processes the far-field and near-field neutron detection signals detected by the neutron sub and stores the processed far-field and near-field neutron signals based on the first control signal. When the logging instrument is located on the surface and receives the second control signal transmitted from the host computer, it sequentially transmits the stored magnetic positioning signals and / or well temperature signals and / or gamma signals and / or far-field and near-field neutron signals to the host computer via the battery sub and the switch module.

[0039] To address the aforementioned technical problems, the present invention also provides a computer-readable storage medium for storing a computer program, which, when executed by a processor, implements the well logging method as described above.

[0040] The purpose of this invention is to provide a logging instrument, method, and computer-readable storage medium. The logging instrument includes a switch module, a battery sub, a multi-functional storage sub, and a neutron sub. The logging instrument receives a first control signal transmitted from a host computer on the surface. When downhole, the switch module transmits power from the battery sub to the multi-functional storage sub or the neutron sub according to the first control signal. After being powered on, the multi-functional storage sub collects and stores magnetic positioning signals and / or well temperature signals and / or gamma signals according to the first control signal, and sends power and a target trigger signal to the neutron sub to collect near and far neutron signals. When the logging instrument returns to the surface, if it receives a second control signal transmitted from the host computer, it transmits the stored data to the host computer. Data and power transmission can be completed without cables, and logging tasks can be accurately completed even in highly deviated and horizontal wells. Attached Figure Description

[0041] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0042] Figure 1 This invention provides a schematic diagram of the structure of a well logging instrument;

[0043] Figure 2 This is a schematic diagram of the structure of another logging instrument provided by the present invention;

[0044] Figure 3 This is a schematic diagram of the structure of another logging instrument provided by the present invention;

[0045] Figure 4 A schematic diagram of the structure of a multifunctional storage short section provided by the present invention;

[0046] Figure 5 This is a schematic diagram of the structure of a neutron detection sub-section provided by the present invention;

[0047] Figure 6 This is a schematic diagram of the structure of a neutron generator short section provided by the present invention. Detailed Implementation

[0048] The core of this invention is to provide a logging instrument, method, and computer-readable storage medium. The logging instrument provided by this solution is powered by an internal battery stub, and the logging instrument is configured in advance on the surface to perform working mode, collect and store data downhole, and when it returns to the surface, if it is connected to a host computer, the stored data is transmitted to the host computer. Data transmission and power transmission can be completed without the need for cables, and logging tasks can be accurately completed even in highly deviated wells and horizontal wells.

[0049] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0050] Please refer to Figure 1 , Figure 1The present invention provides a schematic diagram of the structure of a logging instrument, which includes: a switch module 1, a battery sub-section 2, a multi-functional storage sub-section 3, and a neutron sub-section 4. When the logging instrument is located on the ground, the common end of the host computer, switch module 1, battery sub-section 2, multi-functional storage sub-section 3, and neutron sub-section 4 is connected to the ground.

[0051] The power input terminal of the switch module 1 is connected to the battery stub 2, the power output terminal is connected to the battery stub 2, and the control input terminal is connected to the host computer. It is used to receive the first control signal transmitted by the host computer when the logging instrument is on the ground, and after receiving the initial power transmitted by the battery stub 2, select to transmit the initial power through the battery stub 2 to the multi-functional storage stub 3 and / or the neutron stub 4 based on the first control signal.

[0052] The control input terminal of the battery stub 2 is connected to the control output terminal of the switch module 1, and the control output terminal is connected to the control terminal of the multi-functional storage stub 3. It is used to transmit the first control signal to the multi-functional storage stub 3 and transmit the initial electrical energy to the switch module 1 based on the control of the first control signal.

[0053] The signal output terminal of the multi-functional storage sub-section 3 is connected to the neutron sub-section 4, the signal receiving terminal is connected to the neutron sub-section 4, the power supply input terminal is connected to the battery sub-section 2, and the power supply output terminal is connected to the neutron sub-section 4. It is used to detect and store magnetic positioning signals and / or well temperature signals and / or gamma signals based on the first control signal after receiving initial power, and to transmit a target trigger signal to the neutron sub-section 4. It processes the far-field neutron detection signals and near-field neutron detection signals detected by the neutron sub-section 4, and stores the processed far-field and near-field neutron signals based on the first control signal. When the logging instrument is located on the ground and receives the second control signal transmitted by the host computer, it transmits the stored magnetic positioning signals and / or well temperature signals and / or gamma signals and / or far-field and near-field neutron signals to the host computer in sequence through the battery sub-section 2 and the switch module 1. The logging instrument provided by this solution is powered by an internal battery stub 2. The logging instrument is configured in advance on the surface to operate in different modes. It collects and stores data downhole. When it returns to the surface, if it is connected to a host computer, the stored data is transferred to the host computer. Data and power transmission can be completed without the need for cables. It can accurately complete logging tasks even in highly deviated and horizontal wells.

[0054] In this invention, when the logging instrument is located on the surface, the host computer sequentially transmits a first control signal to the switch module 1, battery sub-section 2, and multi-functional storage sub-section 3 within the logging instrument. The switch module 1, under the control of the first control signal, transfers the electrical energy transmitted by the battery sub-section 2 to the multi-functional storage sub-section 3 and / or the neutron sub-section 4. After power-on, the multi-functional storage sub-section 3 detects and stores magnetic positioning signals and / or well temperature signals and / or gamma signals based on the first control signal, and selects whether to transmit a target trigger signal to the neutron sub-section 4 based on the control of the first control signal. When section 4 transmits the target trigger signal, neutron section 4 transmits the detected far neutron detection signal and near neutron detection signal to multi-functional storage section 3. Multi-functional storage section 3 then processes the far neutron detection signal and near neutron detection signal into far and near neutron signals, and stores the far and near neutron signals based on the control of the first control signal. When the logging instrument is located on the ground and receives the second control signal transmitted by the host computer, multi-functional storage section 3 will transmit the stored magnetic positioning signal and / or well temperature signal and / or gamma signal and / or far and near neutron signals to the host computer in sequence through battery section 2 and switch module 1.

[0055] It should be noted that the purpose of this invention is to design a novel storage-type PNN logging instrument. The instrument is battery-powered, and the logging data is stored on a storage chip. A laptop computer (host computer) on the surface sets the downhole instrument's operating mode via USB (Universal Serial Bus) communication. After setting, the instrument is lowered into the well using a cableless method. After completing the logging task according to the set operating mode, the instrument is retrieved from the surface, and the laptop computer reads the logging data from the downhole instrument via USB communication. Its structure is as follows... Figure 2 As shown, the storage-type PNN downhole instrument consists of five parts: 1. Switch module (key switch) 1; 2. Battery sub-section 2; 3. Multifunctional storage sub-section 3; 4. Neutron detection sub-section; 5. Neutron generator sub-section; and the overall instrument wiring layout is shown in the diagram below. Figure 3 As shown.

[0056] It should also be noted that the main function of switch module 1 is to allow the battery to power the downhole instrument. The laptop's USB communication cable communicates with the multi-function storage section 3 through switch module 1 to set the instrument's operating mode and read logging data. Battery section 2 powers the various sections of the instrument through switch module 1. When switch module 1 is not connected, the battery does not power the instrument, protecting both the battery and the instrument. The lower part of switch module 1 is connected to battery section 2, and its wiring includes one battery voltage input line, one battery voltage output line, one USB+ line, one 4 USB- line, and one ground line. The upper part is connected to the laptop, and its wiring includes one USB+ line, one 4 USB- line, and one ground line. Battery power is connected to the battery voltage input line, and the battery voltage output line powers the instrument. Shorting the battery voltage input and output lines allows the battery voltage to power the instrument through switch module 1. Connecting the upper and lower USB+, USB-, and ground lines allows the laptop to communicate with the instrument via USB.

[0057] It should also be noted that battery segment 2 is responsible for the power supply of the entire instrument. Both the power required by the instrument and the length of the segment must be considered. In normal operating mode, the direct-reading PNN instrument operates at 150V and consumes approximately 200mA of current, or 30W of power. A 40V high-temperature battery pack with a capacity of 6300mAh is selected. The lower end of battery segment 2 connects to the multi-functional storage segment 3, with one battery power output, one USB+ cable, one 4 USB- cable, and one ground wire. The upper end of battery segment 2 has one battery voltage input, one battery voltage output, one USB+ cable, one 4 USB- cable, and one ground wire.

[0058] This embodiment provides a logging instrument, which includes a switch module 1, a battery sub 2, a multi-functional storage sub 3, and a neutron sub 4. The logging instrument receives a first control signal transmitted from a host computer on the surface. When downhole, the switch module 1 transmits power from the battery sub 2 to either the multi-functional storage sub 3 or the neutron sub 4 according to the first control signal. After being powered on, the multi-functional storage sub 3 collects and stores magnetic positioning signals and / or well temperature signals and / or gamma signals according to the first control signal, and sends power and a target trigger signal to the neutron sub 4 to collect near and far neutron signals. When the logging instrument returns to the surface, if it receives a second control signal transmitted from the host computer, it transmits the stored data to the host computer. Data and power transmission can be completed without the need for cables, and logging tasks can be accurately completed even in highly deviated and horizontal wells.

[0059] Based on the above embodiments:

[0060] As an optional embodiment, the multi-functional storage section 3 includes: a USB communication circuit, a first power supply circuit, a data storage circuit, a magnetic positioning processing circuit, a well temperature processing circuit, a gamma circuit, a microcontroller circuit, a neutron far-field probe processing circuit, a neutron near-field probe processing circuit, a magnetic positioning probe, a well temperature probe, a gamma probe, and a target-triggered pulse transmission circuit.

[0061] One end of the first power supply circuit is connected to the battery stub 2, and the other end is connected to the ground wire, USB communication circuit, microcontroller circuit, data storage circuit, magnetic positioning processing circuit, well temperature processing circuit, gamma circuit, magnetic positioning probe, well temperature probe, gamma probe and target trigger pulse transmission circuit respectively. It is used to convert the initial electrical energy into the working electrical energy corresponding to the USB communication circuit, microcontroller circuit, data storage circuit, magnetic positioning processing circuit, well temperature processing circuit, gamma circuit, magnetic positioning probe, well temperature probe, gamma probe and target trigger pulse transmission circuit respectively.

[0062] The USB communication circuit is connected to the microcontroller circuit and the host computer respectively, and is used to transmit the first control signal to the microcontroller circuit.

[0063] The microcontroller circuit is connected to the data storage circuit, magnetic positioning processing circuit, well temperature processing circuit, gamma circuit, and target trigger pulse transmission circuit, respectively. It is used to transmit the magnetic positioning signal transmitted by the magnetic positioning processing circuit and / or the well temperature signal transmitted by the well temperature processing circuit and / or the gamma signal transmitted by the gamma circuit to the data storage circuit based on the control of the first control signal. It also controls the target trigger pulse transmission circuit to send the target trigger signal to the neutron sub-section 4 based on the first control signal. It converts the processed far neutron detection signal transmitted by the neutron far probe processing circuit and the processed near neutron detection signal transmitted by the neutron near probe processing circuit into far and near neutron signals, and transmits the far and near neutron signals to the data storage circuit based on the control of the first control signal.

[0064] The magnetic positioning processing circuit is connected to the magnetic positioning probe and is used to convert the magnetic positioning probe signal detected by the magnetic positioning probe into a magnetic positioning signal;

[0065] The well temperature processing circuit is connected to the well temperature probe and is used to convert the well temperature probe signal detected by the well temperature probe into a well temperature signal;

[0066] The gamma circuit is connected to the gamma probe and is used to convert the gamma probe signal detected by the gamma probe into a gamma signal;

[0067] The neutron remote probe processing circuit is connected to the microcontroller circuit and the neutron short section 4 respectively, and is used to process the remote neutron detection signal transmitted by the neutron short section 4;

[0068] The neutron proximity probe processing circuit is connected to the microcontroller circuit and the neutron short section 4, respectively, and is used to process the proximity neutron detection signal transmitted by the neutron short section 4.

[0069] In this invention, the multifunctional storage sub-section 3 is equipped with a USB communication circuit, a first power supply circuit, a data storage circuit, a magnetic positioning processing circuit, a well temperature processing circuit, a gamma circuit, a microcontroller circuit, a neutron far-field probe processing circuit, a neutron near-field probe processing circuit, a magnetic positioning probe, a well temperature probe, a gamma probe, and a target-triggered pulse transmission circuit. The first power supply circuit converts the initial electrical energy transmitted from the battery sub-section 2 into the corresponding operating electrical energy for the USB communication circuit, microcontroller circuit, data storage circuit, magnetic positioning processing circuit, well temperature processing circuit, gamma circuit, magnetic positioning probe, well temperature probe, gamma probe, and target-triggered pulse transmission circuit, enabling these devices to operate. The magnetic positioning processing circuit converts the magnetic positioning probe signal detected by the magnetic positioning probe into a magnetic positioning signal, the well temperature processing circuit converts the well temperature probe signal detected by the well temperature probe into a well temperature signal, and the gamma circuit converts the magnetic positioning probe signal detected by the well temperature probe into a well temperature signal. The gamma probe signal detected by the gamma probe is converted into a gamma signal. The USB communication circuit can transmit the first control signal from the host computer to the microcontroller circuit. After power-on, the microcontroller circuit will select, based on the first control signal, to transmit the magnetic positioning signal and / or well temperature signal and / or gamma signal to the data storage circuit for storage. It will also control the target trigger pulse sending circuit to send the target trigger signal to the neutron sub-section 4 based on the first control signal. The neutron far probe processing circuit will process the far neutron detection signal transmitted by the neutron sub-section 4, and the neutron near probe processing circuit will process the near neutron detection signal transmitted by the neutron sub-section 4. The microcontroller circuit will convert the processed far neutron detection signal and the processed near neutron detection signal into far-near neutron signals, and select whether to transmit the far-near neutron signals to the data storage circuit for storage according to the first control signal, thus ensuring the accuracy and reliability of data transmission and data storage.

[0070] It should be noted that the multi-functional storage section 3 is the core of the entire instrument, and its structure is as follows: Figure 4As shown. The power supply circuit receives battery voltage and generates the 5V and ±15V voltages required for the sub-section to operate. The gamma high-voltage circuit generates the 1000-2000V DC high voltage required for the gamma probe to operate. The gamma circuit receives the gamma probe signal from this sub-section, processes it, and sends it to the microcontroller. The magnetic positioning processing circuit receives the signal from the magnet coil of this sub-section and sends the processed signal to the microcontroller. The well temperature processing circuit receives the temperature probe signal from this sub-section, processes it, and sends it to the microcontroller. The signal from the neutron detection sub-section is processed into near and far neutron signals and sent to the microcontroller. The microcontroller stores the received gamma, well temperature, magnetic positioning, and near / far neutron signals through a storage circuit. In target firing mode, the microcontroller sends the target firing trigger pulse to the neutron generator sub-section through the target firing pulse sending circuit. The microcontroller communicates with the laptop via a USB communication circuit. During the surface logging preparation phase, the laptop completes the logging mode settings on the ground. After logging is completed, the instrument is retrieved from the bottom of the well, and the computer reads the logging data from the data storage circuit. The upper part of the multi-function storage section 3 has one battery power output line, one USB+ cable, one 4 USB- cable, and one ground wire. The lower part has one battery output line, one far neutron signal line from the neutron detection section, one near neutron signal line from the neutron detection section, one target trigger pulse line, and one ground wire.

[0071] As an optional embodiment, the multi-functional storage section 3 further includes:

[0072] The first LC filter circuit is connected in series between the first power supply circuit and the ground wire. It is used to filter the working power of the USB communication circuit, the microcontroller circuit, the data storage circuit, the magnetic positioning processing circuit, the well temperature processing circuit, the gamma circuit, the magnetic positioning probe, the well temperature probe, the gamma probe and the target trigger pulse sending circuit.

[0073] In this invention, the first LC filter circuit is located between the first power supply circuit and the ground wire, which can filter the various working electrical energies output by the first power supply circuit, thereby improving the efficiency and accuracy of the USB communication circuit, the microcontroller circuit, the data storage circuit, the magnetic positioning processing circuit, the well temperature processing circuit, the gamma circuit, the magnetic positioning probe, the well temperature probe, the gamma probe, and the target trigger pulse sending circuit.

[0074] It should be noted that in practical applications, either an LC filter circuit, an RC filter circuit, a filter, or a single capacitor can be selected for filtering.

[0075] It should also be noted that, by Figure 4As can be seen, an LC filter circuit consists of one inductor and two capacitors. In practical applications, the number of capacitors and inductors in an LC filter circuit is determined by actual needs, and this application does not impose any special restrictions here.

[0076] As an optional embodiment, neutron subsection 4 includes: a neutron detection subsection and a neutron generator subsection;

[0077] The power supply input terminal of the neutron detection sub is connected to the multi-functional storage sub 3, the power supply output terminal is connected to the neutron generator sub, the neutron signal output terminal is connected to the multi-functional storage sub 3, and the target trigger signal output terminal is connected to the neutron generator sub. This is used to send a target trigger signal to the neutron generator sub after receiving initial power, so that the neutron generator sub emits neutrons and transmits the detected far-field neutron detection signal and near-field neutron detection signal to the multi-functional storage sub 3.

[0078] In this invention, the neutron short section 4 is equipped with a neutron detection short section and a neutron generator short section. After receiving initial electrical energy, the neutron detection short section sends a target trigger signal to the neutron generator short section. After receiving the target trigger signal, the neutron generator short section emits neutrons, enabling the neutron detection short section to detect both far-field and near-field neutron detection signals. Finally, the neutron detection short section transmits the detected far-field and near-field neutron detection signals to the multi-functional storage short section 3, ensuring the accuracy of the detection of far-field and near-field neutron detection signals.

[0079] As an optional embodiment, the neutron detection subsection includes: a second power supply circuit, a neutron signal processing circuit, a neutron high voltage circuit, a neutron near detector, and a neutron far detector;

[0080] One end of the second power supply circuit is connected to the multi-functional storage section 3, and the other end is connected to the ground wire, the neutron signal processing circuit and the neutron high voltage circuit respectively, which is used to convert the initial electrical energy into the working electrical energy corresponding to the neutron signal processing circuit and the neutron high voltage circuit.

[0081] The neutron high voltage circuit is connected to the neutron near detector and the neutron far detector respectively. After receiving its own corresponding working power, it transmits preset power to the neutron near detector and the neutron far detector respectively so that the neutron near detector and the neutron far detector can work normally. The voltage corresponding to the preset power is greater than the first voltage threshold.

[0082] The neutron signal processing circuit is connected to the multi-functional storage section 3, the neutron near detector, the neutron far detector, and the neutron generator section, respectively. It is used to send a target trigger signal to the neutron generator section, process the neutron far detector signal detected by the neutron far detector and the neutron near detector signal detected by the neutron near detector, and transmit the processed far neutron detection signal and near neutron detection signal to the multi-functional storage section 3.

[0083] In this invention, the neutron detection sub-section is equipped with a second power supply circuit, a neutron signal processing circuit, a neutron high-voltage circuit, a neutron near detector, and a neutron far detector. The second power supply circuit converts the initial electrical energy transmitted from the battery sub-section 2 into the corresponding operating electrical energy for the neutron signal processing circuit and the neutron high-voltage circuit, enabling them to power on and operate. After power-on, the neutron signal processing circuit sends a target trigger signal to the neutron generator sub-section. After power-on, the neutron high-voltage circuit transmits preset electrical energy to the neutron near detector and the neutron far detector, respectively, to enable them to operate normally and detect the neutron far detector signal and the neutron near detector signal. The neutron signal processing circuit processes the neutron far detector signal and the neutron near detector signal accordingly, and transmits the processed far neutron detection signal and near neutron detection signal to the multi-functional storage sub-section 3, ensuring the accuracy of the transmission and processing of the far neutron detection signal and the near neutron detection signal.

[0084] It should be noted that the structure of the neutron detector section is as follows: Figure 5 As shown. The 40V DC power from battery section 2 supplies power to the power supply circuit, generating the 5V and 15V power required for circuit operation. The neutron high-voltage circuit generates a high-voltage DC power supply to the near and far neutron detectors. Simultaneously, the neutron circuit receives two weak neutron signals from the near and far neutron detectors, processes them into two neutron pulse signals with certain driving capability and amplitude, and transmits them to the multi-functional storage section 3. The upper end of the neutron detection section has one battery power supply output line, one far neutron signal output line, one near neutron signal output line, one target trigger pulse line from the multi-functional storage section 3, and one ground wire. The lower end has one battery output line, one target trigger pulse line from the multi-functional storage section 3, and one ground wire.

[0085] As an optional embodiment, the neutron detection subsection also includes:

[0086] The second LC filter circuit is connected in series between the second power supply circuit and the ground wire, and is used to filter the working power corresponding to the neutron signal processing circuit and the neutron high voltage circuit.

[0087] In this invention, the second LC filter circuit is located between the second power supply circuit and the ground wire, which can filter the various working electrical energies output by the second power supply circuit, thereby improving the efficiency and accuracy of the neutron signal processing circuit and the neutron high voltage circuit.

[0088] It should be noted that in practical applications, either an LC filter circuit, an RC filter circuit, a filter, or a single capacitor can be selected for filtering.

[0089] As an optional embodiment, the neutron generator section includes: a third power supply circuit, a high voltage generation circuit, a high voltage discharge circuit, and a neutron tube;

[0090] One end of the third power supply circuit is connected to the neutron detector section, and the other end is connected to the ground wire and the high-voltage discharge circuit, respectively, to convert the initial electrical energy into the working electrical energy corresponding to the high-voltage discharge circuit.

[0091] The high-voltage generation circuit is connected to the neutron detection subsection and is used to operate after receiving initial electrical energy and the target trigger signal.

[0092] The high-voltage discharge circuit is connected to the neutron detection subsection and is used to operate after receiving its corresponding working power and the target trigger signal.

[0093] The neutron tube is connected to the high-voltage generation circuit and the high-voltage discharge circuit respectively, and is used to emit neutrons when it receives a preset negative pulse generated by the high-voltage generation circuit and the high-voltage discharge circuit. The voltage corresponding to the preset negative pulse is greater than the second voltage threshold.

[0094] In this invention, the neutron generator subsection is equipped with a third power supply circuit, a high voltage generation circuit, a high voltage discharge circuit, and a neutron tube. The third power supply circuit can convert the initial electrical energy output by the battery subsection 2 into the working electrical energy corresponding to the high voltage discharge circuit, so as to power on the high voltage discharge circuit. The high voltage generation circuit operates after receiving the initial electrical energy output by the battery subsection 2 and the target trigger signal. The high voltage generation circuit operates after receiving the target trigger signal after being powered on. The neutron tube emits neutrons when it receives the preset negative pulse generated when the high voltage generation circuit and the high voltage discharge circuit are operating, thus ensuring the integrity of the neutron target hitting process.

[0095] It should be noted that the main function of the neutron generator is to receive the target trigger pulse signal and generate the 3000-volt negative pulse required for the neutron tube to operate. Its structure is as follows: Figure 6As shown. The 40V DC power from battery segment 2 supplies power to the power supply circuit, generating the 24V and 15V power required for circuit operation. Simultaneously, the 40V DC power from battery segment 2 also supplies power to the 3000V DC high-voltage generation circuit. When the target-triggered pulse transmitting circuit in the multi-functional storage segment 3 generates a target-triggered pulse signal, the 3000V DC high-voltage circuit operates, generating a 3000V DC high voltage. Simultaneously, the 3000V high-voltage discharge circuit operates, discharging the 3000V DC high voltage and generating a 3000V DC high-voltage negative pulse, which supplies power to the neutron tube, enabling the neutron tube to emit neutrons. When the target-triggered pulse transmitting circuit does not generate a target-triggered pulse signal, neither the DC high voltage nor the 3000V DC high-voltage negative pulse is generated. The upper end of the neutron generator segment has one battery output line, one target-triggered pulse line from the multi-functional storage segment 3, and one ground line.

[0096] As an optional embodiment, the neutron generator section further includes:

[0097] The third LC filter circuit is connected in series between the third power supply circuit and the ground wire, and is used to filter the working power corresponding to the high-voltage discharge circuit.

[0098] In this invention, the third LC filter circuit is located between the third power supply circuit and the ground wire, which can filter the various working electrical energies output by the third power supply circuit, thereby improving the efficiency and accuracy of the high-voltage discharge circuit.

[0099] It should be noted that in practical applications, either an LC filter circuit, an RC filter circuit, a filter, or a single capacitor can be selected for filtering.

[0100] This invention also provides an embodiment of a logging method, applied to a logging instrument, the logging instrument comprising: a switch module 1, a battery sub-section 2, a multi-functional storage sub-section 3, and a neutron sub-section 4; the method comprising:

[0101] When the logging instrument is on the ground, the switch module 1 receives the first control signal transmitted by the host computer, and after receiving the initial electrical energy transmitted by the battery sub 2, selects to transmit the initial electrical energy through the battery sub 2 to the multi-functional storage sub 3 and / or the neutron sub 4 based on the first control signal.

[0102] The first control signal is transmitted to the multi-functional storage segment 3 using the battery segment 2, and the initial electrical energy is transmitted to the switching module 1 based on the control of the first control signal.

[0103] After receiving initial electrical energy, the multi-functional storage sub 3 detects and stores magnetic positioning signals and / or well temperature signals and / or gamma signals based on the first control signal, and transmits a target trigger signal to the neutron sub 4. It processes the far-field and near-field neutron detection signals detected by the neutron sub 4 and stores the processed far-field and near-field neutron signals based on the first control signal. When the logging instrument is on the ground and receives the second control signal transmitted from the host computer, it transmits the stored magnetic positioning signals and / or well temperature signals and / or gamma signals and / or far-field and near-field neutron signals to the host computer in sequence through the battery sub 2 and the switch module 1.

[0104] The logging method provided in this embodiment corresponds to the logging instrument described above, and therefore has the same beneficial effects as the logging instrument described above. Therefore, for the embodiments of the logging method, please refer to the description of the embodiments of the logging instrument, which will not be repeated here.

[0105] The present invention also provides an embodiment of a computer-readable storage medium for storing a computer program, which, when executed by a processor, implements the well logging method described above.

[0106] It is understood that if the methods in the above embodiments are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and executes all or part of the steps of the methods in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0107] The computer-readable storage medium provided in this embodiment corresponds to the method described above, and therefore has the same beneficial effects as the method described above. Therefore, for the embodiments of the computer-readable storage medium, please refer to the description of the embodiments in the method section, which will not be repeated here.

[0108] It should be noted that, in this specification, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply 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. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0109] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A well logging instrument characterized by, include: The switch module, battery sub-section, multi-functional storage sub-section, and neutron sub-section are connected to the ground when the logging instrument is located on the ground. The power supply input terminal of the switch module is connected to the battery stub, the power supply output terminal is connected to the battery stub, and the control input terminal is connected to the host computer. It is used to receive the first control signal transmitted by the host computer when the logging instrument is on the ground, and after receiving the initial power transmitted by the battery stub, select to transmit the initial power through the battery stub to the multi-functional storage stub and / or the neutron stub based on the first control signal. The control input terminal of the battery stub is connected to the control output terminal of the switch module, and the control output terminal is connected to the control terminal of the multi-functional storage stub, for transmitting the first control signal to the multi-functional storage stub, and transmitting the initial electrical energy to the switch module based on the control of the first control signal; The signal output terminal of the multifunctional storage sub is connected to the neutron sub, the signal receiving terminal is connected to the neutron sub, the power supply input terminal is connected to the battery sub, and the power supply output terminal is connected to the neutron sub. It is used to detect and store magnetic positioning signals and / or well temperature signals and / or gamma signals based on the first control signal after receiving the initial electrical energy, and to transmit a target trigger signal to the neutron sub. It processes the far-field and near-field neutron detection signals detected by the neutron sub, and stores the processed far-field and near-field neutron signals based on the first control signal. When the logging instrument is located on the ground and receives the second control signal transmitted by the host computer, it sequentially transmits the stored magnetic positioning signals and / or well temperature signals and / or gamma signals and / or far-field and near-field neutron signals to the host computer through the battery sub and the switching module.

2. The logging instrument as described in claim 1, characterized in that, The multifunctional storage section includes: a USB communication circuit, a first power supply circuit, a data storage circuit, a magnetic positioning processing circuit, a well temperature processing circuit, a gamma circuit, a microcontroller circuit, a neutron far-field probe processing circuit, a neutron near-field probe processing circuit, a magnetic positioning probe, a well temperature probe, a gamma probe, and a target-triggered pulse transmission circuit. One end of the first power supply circuit is connected to the battery short segment, and the other end is connected to the ground wire, the USB communication circuit, the microcontroller circuit, the data storage circuit, the magnetic positioning processing circuit, the well temperature processing circuit, the gamma circuit, the magnetic positioning probe, the well temperature probe, the gamma probe, and the target trigger pulse sending circuit, respectively, to convert the initial electrical energy into the working electrical energy corresponding to the USB communication circuit, the microcontroller circuit, the data storage circuit, the magnetic positioning processing circuit, the well temperature processing circuit, the gamma circuit, the magnetic positioning probe, the well temperature probe, the gamma probe, and the target trigger pulse sending circuit; The USB communication circuit is connected to the microcontroller circuit and the host computer respectively, and is used to transmit the first control signal to the microcontroller circuit. The microcontroller circuit is connected to the data storage circuit, the magnetic positioning processing circuit, the well temperature processing circuit, the gamma circuit, and the target trigger pulse sending circuit, respectively. It is used to transmit the magnetic positioning signal transmitted by the magnetic positioning processing circuit and / or the well temperature signal transmitted by the well temperature processing circuit and / or the gamma signal transmitted by the gamma circuit to the data storage circuit based on the control of the first control signal. It also controls the target trigger pulse sending circuit to send the target trigger signal to the neutron sub-node based on the first control signal, converts the processed far-neutron detection signal transmitted by the far-neutron probe processing circuit and the processed near-neutron detection signal transmitted by the near-neutron probe processing circuit into far-near neutron signals, and transmits these far-near neutron signals to the data storage circuit based on the control of the first control signal. The magnetic positioning processing circuit is connected to the magnetic positioning probe and is used to convert the magnetic positioning probe signal detected by the magnetic positioning probe into the magnetic positioning signal; The well temperature processing circuit is connected to the well temperature probe and is used to convert the well temperature probe signal detected by the well temperature probe into the well temperature signal. The gamma circuit is connected to the gamma probe and is used to convert the gamma probe signal detected by the gamma probe into the gamma signal; The neutron remote probe processing circuit is connected to the microcontroller circuit and the neutron stub respectively, and is used to process the remote neutron detection signal transmitted by the neutron stub; The neutron near-probe processing circuit is connected to the microcontroller circuit and the neutron sub-section, respectively, and is used to process the near-neutron detection signal transmitted by the neutron sub-section.

3. The logging instrument as described in claim 2, characterized in that, The multi-functional storage section also includes: The first LC filter circuit is connected in series between the first power supply circuit and the ground wire, and is used to filter the working power corresponding to the USB communication circuit, the microcontroller circuit, the data storage circuit, the magnetic positioning processing circuit, the well temperature processing circuit, the gamma circuit, the magnetic positioning probe, the well temperature probe, the gamma probe and the target trigger pulse sending circuit.

4. The logging instrument as described in claim 1, characterized in that, The neutron short section includes: a neutron detection short section and a neutron generator short section; The power supply input terminal of the neutron detection section is connected to the multifunctional storage section, the power supply output terminal is connected to the neutron generator section, the neutron signal output terminal is connected to the multifunctional storage section, and the target trigger signal output terminal is connected to the neutron generator section. These terminals are used to send the target trigger signal to the neutron generator section after receiving the initial electrical energy, so that the neutron generator section emits neutrons and transmits the detected far-field neutron detection signal and near-field neutron detection signal to the multifunctional storage section.

5. The well-logging apparatus of claim 4, wherein, The neutron detection subsection includes: a second power supply circuit, a neutron signal processing circuit, a neutron high voltage circuit, a neutron near detector, and a neutron far detector; One end of the second power supply circuit is connected to the multi-functional storage stub, and the other end is connected to the ground wire, the neutron signal processing circuit, and the neutron high voltage circuit, respectively, for converting the initial electrical energy into the working electrical energy corresponding to the neutron signal processing circuit and the neutron high voltage circuit; The neutron high voltage circuit is connected to the neutron near detector and the neutron far detector respectively, and is used to transmit preset power to the neutron near detector and the neutron far detector respectively after receiving its own corresponding working power, so as to enable the neutron near detector and the neutron far detector to work normally. The voltage corresponding to the preset power is greater than the first voltage threshold. The neutron signal processing circuit is connected to the multifunctional storage section, the near-neutron detector, the far-neutron detector, and the neutron generator section, respectively. It is used to send the target trigger signal to the neutron generator section, process the far-neutron detector signal detected by the far-neutron detector and the near-neutron detector signal detected by the near-neutron detector, and transmit the processed far-neutron detection signal and near-neutron detection signal to the multifunctional storage section.

6. The well-logging apparatus of claim 5 wherein, The neutron detection subsection also includes: The second LC filter circuit is connected in series between the second power supply circuit and the ground wire, and is used to filter the working power corresponding to the neutron signal processing circuit and the neutron high voltage circuit.

7. The well-logging apparatus of claim 4 wherein, The neutron generator section includes: a third power supply circuit, a high voltage generation circuit, a high voltage discharge circuit, and a neutron tube; One end of the third power supply circuit is connected to the neutron detector section, and the other end is connected to the ground wire and the high-voltage discharge circuit respectively, for converting the initial electrical energy into the working electrical energy corresponding to the high-voltage discharge circuit. The high-voltage generating circuit is connected to the neutron detection subsection and is used to operate after receiving the initial electrical energy and the target trigger signal. The high-voltage discharge circuit is connected to the neutron detection subsection and is used to operate after receiving its corresponding working power and the target trigger signal. The neutron tube is connected to the high-voltage generating circuit and the high-voltage discharging circuit respectively, and is used to emit the neutron when a preset negative pulse generated by the high-voltage generating circuit and the high-voltage discharging circuit is received. The voltage corresponding to the preset negative pulse is greater than a second voltage threshold.

8. The well-logging apparatus of claim 7 wherein, The neutron generator section also includes: The third LC filter circuit is connected in series between the third power supply circuit and the ground wire, and is used to filter the working power corresponding to the high-voltage discharge circuit.

9. A method of well logging, characterized by, The method is applied to a logging instrument, the logging instrument comprising: a switch module, a battery sub, a multi-functional storage sub, and a neutron sub; the method comprises: When the logging instrument is on the ground, the switch module receives the first control signal transmitted by the host computer, and after receiving the initial electrical energy transmitted by the battery sub, selects to transmit the initial electrical energy through the battery sub to the multi-functional storage sub and / or the neutron sub based on the first control signal; The first control signal is transmitted to the multi-functional storage segment using the battery segment, and the initial electrical energy is transmitted to the switching module based on the control of the first control signal; After receiving the initial electrical energy, the multi-functional storage sub detects and stores magnetic positioning signals and / or well temperature signals and / or gamma signals based on the first control signal, and transmits a target trigger signal to the neutron sub. It processes the far-field and near-field neutron detection signals detected by the neutron sub and stores the processed far-field and near-field neutron signals based on the first control signal. When the logging instrument is located on the surface and receives the second control signal transmitted from the host computer, it sequentially transmits the stored magnetic positioning signals and / or well temperature signals and / or gamma signals and / or far-field and near-field neutron signals to the host computer via the battery sub and the switch module.

10. A computer-readable storage medium, characterized in that, Used to store a computer program, which, when executed by a processor, implements the logging method as described in claim 9.

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