CN112459769A - Storage type well logging system, method and application controlled by accelerometer signal coding and decoding - Google Patents
Storage type well logging system, method and application controlled by accelerometer signal coding and decoding Download PDFInfo
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
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- E21B47/00—Survey of boreholes or wells
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
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Abstract
The invention belongs to the technical field of logging in oil drilling and discloses a storage type logging system controlled by an accelerometer signal coding and decoding, a method and application thereof. The invention provides a storage type logging instrument controlled by an accelerometer signal coding and decoding, which aims to solve the problems that the logging instrument can be switched between a working state and a dormant state, a support arm is folded at any time and the like. The waste of battery power caused by long-time invalid power supply is avoided, and the problems of invalid data acquisition of the logging instrument and mass storage of useless data caused by long-time invalid power supply of the logging instrument are effectively solved.
Description
Technical Field
The invention belongs to the technical field of logging in oil drilling, and particularly relates to a storage type logging system and method for signal coding and decoding control of an accelerometer and application of the system and method.
Background
At present, in the process of oil exploration and development, a logging instrument needs to be put into a shaft after drilling is completed, various physical parameters of different well depths in the shaft are measured, and the content of petroleum and natural gas in stratums of different well depths is analyzed and judged according to the physical parameters. Well logging processes such as pump-out storage type well logging and the like can be adopted for logging of horizontal wells and complex wells which are drilled smoothly; in some drilling rod-passing well logging systems at home and abroad, the ground acquisition system is connected with the instrument through a wire, and the instrument can be monitored in the instrument conveying process. After the instrument reaches the target interval, a logging engineer sends a logging instruction after checking the instrument state is normal, the instrument is placed in the normal logging state, the hanging system is separated, the wired connection is cut off, and then the ground system cannot establish information connection with the underground instrument. When the logging is finished and the underground instrument needs to be recovered, the logging engineer cannot control the underground instrument. In the logging process, the wired connection between the ground system and the underground instrument is cut off, and the ground system cannot effectively control the working state of the underground instrument. The support arm cannot be opened or folded in time, and the state of the battery cannot be controlled, so that the following obvious defects exist: 1) the support arm can not be folded, the instrument can not be closed, and the difficulty in recovering the instrument is increased. (2) The logging instrument set adopts the underground battery to provide power for each logging instrument, but the instrument is in a working state before reaching a target layer, and battery power is wasted due to long-time ineffective power supply.
Through the above analysis, the problems and defects of the prior art are as follows:
(1) when the existing logging is finished and underground instruments need to be recovered, the support arm cannot be folded, the instruments cannot be closed, and the recovery difficulty of the instruments is increased.
(2) When the existing logging is finished and downhole instruments need to be recovered, the set of logging instruments adopt downhole batteries to provide power for each logging instrument, but the instruments are also in a working state before reaching a target layer, and battery power is wasted due to long-time ineffective power supply.
The difficulty in solving the above problems and defects is: and the downhole instrument decodes the command issued by the ground system according to the acquired data of the accelerometer sensor, and controls the working state of the downhole instrument according to the decoded command.
The significance of solving the problems and the defects is as follows:
(1) the battery is set to be in a dormant or awakening state by issuing an instruction through the ground system, so that the battery consumption is reduced.
(2) After the instrument is safely lowered into the well, the ground system can issue an instruction to start the instrument and push the support arm away to ensure the normal work of the instrument.
(3) After the target layer logging is finished, an instruction can be issued, the support arm is retracted, and the power supply of the battery is closed. The problem that the instrument cannot be recovered due to the fact that the instrument is clamped when the instrument is lifted is avoided, and the risk of the instrument in the underground is reduced.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a storage type well logging system, a method and application for controlling signal coding and decoding of an accelerometer.
The invention is realized in this way, the storage type logging method of the accelerometer signal coding and decoding control, the order of the accelerometer signal coding and decoding control to the work or dormancy of the downhole logging instrument is that the regular opening and closing of the mud driving pump is controlled by the control order after the ground system is coded, so that the accelerometer sensor in the logging instrument generates regular signals, and after the signals are decoded by the microprocessor, the ground control signal is identified, the control order signal is sent to the logging instrument string, and the work or dormancy of the instrument string is controlled.
Furthermore, the accelerometer signal coding and decoding controlled storage logging instrument of the accelerometer signal coding and decoding controlled storage logging method adopts a Pulse Position Modulation (PPM) coding mode during the coding of a ground system. The encoding method of pulse position modulation PPM is to express different binary data by using different positions of pulse, namely, different binary data are expressed according to the length of the interval between pulses; the microprocessor carries out filtering processing on the acquired signals of the accelerometer sensor, obtains original signal code signals through an envelope detection method, a sampling decision device and a decoder, obtains control command signals of a ground system through calculation processing, and sends control commands to a logging instrument string connected behind.
Furthermore, the accelerometer signal encoding and decoding controlled storage logging instrument of the accelerometer signal encoding and decoding controlled storage logging method adopts a Pulse Position Modulation (PPM) encoding method, and the pulse position modulation encoding is a method of transmitting information by taking a time interval as a data stream; in general, 1 pulse represents 1 hexadecimal number (0 to F), the specific number of which depends on its position, i.e. on the time interval between it and the last pulse; the rule is as follows: the last pulse ends and a pulse appears after 2 times the standard pulse width recovery time, which represents "0"; delay by 1 standard pulse width occurrence, representing a "1"; by analogy, if a pulse occurs 15 pulse widths later, this pulse represents "F"; s represents a synchronous pulse, and the time interval is a fixed value; m denotes the data pulse interval: m ═ 2T + nxt seconds; where N is a hexadecimal number from 0 to F, T is the standard pulse width, and 2T represents the recovery time of the pulse.
Further, the microprocessor of the storage type well logging method controlled by the accelerometer signal coding and decoding carries out a band-pass filter (BPF) on the acquired signal x (t) of the accelerometer sensor, and the envelope is output after envelope detection; and then high-frequency clutter is filtered by a low-pass filter LPF, an original signal code signal is obtained by a sampling decision device and a decoder, a control command signal of a ground system is obtained by calculation processing, and a control command is sent to a logging instrument string connected behind.
It is a further object of the invention to provide a computer device comprising a memory and a processor, the memory storing a computer program which, when executed by the processor, causes the processor to perform the steps of: the command for working or sleeping the underground logging instrument is that the mud driving pump is controlled to be regularly started and closed through a control command after a ground system is coded, so that an accelerometer sensor in a communication module of the logging instrument generates regular signals, the signals are decoded through a microprocessor, ground control signals are identified, control command signals are sent to a logging instrument string, and working or sleeping of the logging instrument string is controlled.
It is another object of the present invention to provide a computer-readable storage medium storing a computer program which, when executed by a processor, causes the processor to perform the steps of: the command for working or sleeping the underground logging instrument is that the mud driving pump is controlled to be regularly started and closed through a control command after a ground system is coded, so that an accelerometer sensor in a communication module of the logging instrument generates regular signals, the signals are decoded through a microprocessor, ground control signals are identified, control command signals are sent to a logging instrument string, and working or sleeping of the logging instrument string is controlled.
Another objective of the present invention is to provide a storage logging system for accelerometer signal codec control for implementing the storage logging method for accelerometer signal codec control, wherein an MCU master control module in a communication module of the storage logging system for accelerometer signal codec control includes an accelerometer sensor; a Flash memory chip; the microprocessor is respectively connected with the accelerometer sensor and the Flash memory chip, and the signals of the accelerometer sensor collected by the microprocessor are decoded and are analyzed and processed to obtain useful information; sending a control command to a logging instrument string connected behind, and storing the calculated information into a Flash chip; the power supply module is used for supplying power to the power supply control module, and the power supply control module is used for supplying power to the MCU main control module.
The invention also aims to provide a dual laterolog instrument which is provided with the storage type logging system controlled by the accelerometer signal coding and decoding.
The invention also aims to provide a natural gamma logging instrument which is provided with the storage type logging system controlled by the accelerometer signal coding and decoding.
The invention also aims to provide the AC compensated acoustic logging instrument which is provided with the storage type logging system controlled by the accelerometer signal coding and decoding.
By combining all the technical schemes, the invention has the advantages and positive effects that: the invention provides a storage type logging instrument controlled by an accelerometer signal coding and decoding, which overcomes the defect that communication cannot be established after wired communication between the ground and an underground instrument is disconnected in the similar system. The problems that the logging instrument can be switched between a working state and a dormant state, the support arm can be folded at any time and the like are solved. The waste of battery power caused by long-time invalid power supply is avoided, and the problems of invalid data acquisition of the logging instrument and mass storage of useless data caused by long-time invalid power supply of the logging instrument are effectively solved. The logging time effectiveness and the logging success rate are improved, and the construction risk is reduced. Pulse Position Modulation (PPM) is an orthogonal modulation mode, and compared with the traditional on-off keying (OOK) modulation, the Pulse Position Modulation (PPM) has higher power utilization rate and frequency band utilization rate, can effectively save channel resources, and can further improve the anti-interference capability of a communication system. The PPM has the advantages that: it only needs to control the pulse position according to the data symbol, does not need to control the pulse amplitude and polarity, and is convenient to realize modulation and demodulation with lower complexity. The modulation and reception of the PPM signal contributes significantly to the performance of the communication system.
TABLE 1 comparison of the prior art and the present invention
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In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments of the present application will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained from the drawings without creative efforts.
Fig. 1 is a flow chart of a memory logging method for accelerometer signal codec control according to an embodiment of the present invention.
FIG. 2 is a schematic structural diagram of a memory logging system controlled by an accelerometer signal codec according to an embodiment of the present invention;
in fig. 2: 1. an accelerometer sensor; 2. a microprocessor; 3. a Flash memory chip; 4. the MCU master control module; 5. a power supply control module; 6. and a power supply module.
Fig. 3 is a schematic diagram of an encoding structure according to an embodiment of the present invention.
Fig. 4 is a schematic diagram of an encoded signal according to an embodiment of the present invention.
Fig. 5 is a schematic decoding diagram provided by the embodiment of the present invention.
FIG. 6 is a simulation diagram of a communication module part of a microprocessor decoding regular signals generated by an accelerometer according to an embodiment of the invention
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In view of the problems in the prior art, the present invention provides a storage type well logging system, method and application for accelerometer signal encoding and decoding control, and the present invention is described in detail below with reference to the accompanying drawings.
As shown in fig. 1, the storage logging method controlled by the accelerometer signal codec provided by the invention comprises the following steps:
s101: the command for working or sleeping the downhole logging instrument is that the mud driving pump is controlled to be regularly started and closed through a control command after PPM coding of a surface system;
s102: causing an accelerometer sensor in a logging instrument to generate regular signals;
s103: after the microprocessor decodes the signals, the microprocessor identifies the ground control signals, sends control command signals to the logging instrument string and controls the operation or dormancy of the instrument string.
Those skilled in the art can also implement other steps in the method for memory logging under control of coding and decoding accelerometer signals provided by the present invention, and as shown in fig. 1, the method for memory logging under control of coding and decoding accelerometer signals provided by the present invention is only one specific embodiment.
As shown in fig. 2, the schematic diagram of the internal circuit of the communication module of the storage logging system controlled by the accelerometer signal codec provided by the present invention, wherein the MCU main control module 4 includes an accelerometer sensor 1; a Flash memory chip 3; the microprocessor 2 is respectively connected with the accelerometer sensor 1 and the Flash memory chip 3, and signals of the accelerometer sensor collected by the microprocessor 2 are decoded and useful information is obtained through analysis and processing. And sending a control command to a logging instrument string connected later, and storing the calculated information into the Flash chip 3. The power supply module 6 is used for supplying power to the power supply control module 5. And the power supply control module 5 is used for supplying power to the MCU main control module 4.
As shown in fig. 3, the schematic diagram of the PPM coding structure of the storage type logging tool controlled by the accelerometer signal codec is shown. The standard time slot signal is sent to the time slot signal generated in the time slot frequency divider, the time slot signal is input into the frame frequency divider, the frame frequency divider generates a frame signal according to the modulated binary number, the frame frequency divider counts the time slot signal, the obtained count value is compared with the pre-modulated data through the numerical value comparator, when the two are equal, a pulse signal is output, the pulse signal obtains a PPM pulse signal through the narrow pulse former, and the output PPM pulse signal and the frame signal obtain the modulated PPM signal through the output module. The output module has the function of buffering data in the modulation circuit, and eliminates competition hazard caused by delay of each output pin of the counter.
As shown in FIG. 4, the coded signal of the memory logging tool controlled by the accelerometer signal codec is shown schematically. A pulse position modulated coding method (PPM) is used. Pulse position modulation coding is a method of transmitting information as a data stream at time intervals. Typically, 1 pulse represents 1 hexadecimal number (0-F), the specific number of which depends on its position, i.e. on the time interval between it and the last pulse. The rule is as follows: the last pulse ends and a pulse appears after 2 times the standard pulse width recovery time, which represents "0"; delay by 1 standard pulse width occurrence, representing a "1"; by analogy, if a pulse occurs 15 pulse widths later, this pulse represents "F". S represents a synchronous pulse, and the time interval is a fixed value; m denotes the data pulse interval: m ═ 2T + nxt (sec); where N is a hexadecimal number from 0 to F, T is the standard pulse width, and 2T represents the recovery time of the pulse. For example, the 4 th pulse has a 4 standard pulse width of the rising data pulse interval from the falling edge to the 5 th pulse, and the 5 th pulse represents the hexadecimal number 0x 02.
As shown in FIG. 5, a schematic diagram of the decoding of the memory logging tool controlled by the encoding and decoding of the accelerometer signals is shown. And the microprocessor performs a band-pass filter (BPF) on the acquired signal x (t) of the accelerometer sensor, and outputs the envelope after envelope detection. Then the high-frequency clutter is filtered by a Low Pass Filter (LPF), then an original signal code signal is obtained by a sampling decision device and a decoder, a control command signal of a ground system is obtained by calculation processing, and a control command is sent to a logging instrument string connected behind.
The invention relates to a storage type logging instrument controlled by an accelerometer signal encoder and decoder, wherein a Pulse Position Modulation (PPM) encoding mode is adopted during encoding of a ground system. The encoding method of Pulse Position Modulation (PPM) is to represent different binary data by using the position of the occurrence of the pulse, i.e. different binary data are expressed according to the length of the interval between pulses. The microprocessor carries out filtering processing on the acquired signals of the accelerometer sensor, then obtains original signal code signals through an envelope detection method, a sampling decision device and a decoder, obtains control command signals of a ground system through calculation processing, and sends control commands to a logging instrument string connected behind.
Fig. 6 is a simulation diagram of the communication module part microprocessor decoding the regular signals generated by the accelerometer. The first 3 pulses are synchronous heads, and are separated by 1 pulse width in pairs. The surface system encodes a pulse width of 30s, controls the mud driven pump to be turned on and off regularly through control commands, and generates 4 bytes of control commands (for example: 0X 13204532) through an accelerometer to control the downhole logging instrument string. Curve one shows the regular control command signals generated by the ground control accelerometer. And the curve two represents a signal code signal generated after the data obtained by the signals generated by the accelerometer and acquired by the AD chip are calculated and processed by the microprocessor. The microprocessor calculates the distance between the two pulses to determine the control commands generated by the surface system, thereby controlling the state of the downhole tool string.
In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
It should be noted that the embodiments of the present invention can be realized by hardware, software, or a combination of software and hardware. The hardware portion may be implemented using dedicated logic; the software portions may be stored in a memory and executed by a suitable instruction execution system, such as a microprocessor or specially designed hardware. Those skilled in the art will appreciate that the apparatus and methods described above may be implemented using computer executable instructions and/or embodied in processor control code, such code being provided on a carrier medium such as a disk, CD-or DVD-ROM, programmable memory such as read only memory (firmware), or a data carrier such as an optical or electronic signal carrier, for example. The apparatus and its modules of the present invention may be implemented by hardware circuits such as very large scale integrated circuits or gate arrays, semiconductors such as logic chips, transistors, or programmable hardware devices such as field programmable gate arrays, programmable logic devices, etc., or by software executed by various types of processors, or by a combination of hardware circuits and software, e.g., firmware.
The above description is only for the purpose of illustrating the present invention and the appended claims are not to be construed as limiting the scope of the invention, which is intended to cover all modifications, equivalents and improvements that are within the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A storage type well logging method controlled by an accelerometer signal encoder/decoder is characterized in that a command of the storage type well logging method controlled by the accelerometer signal encoder/decoder for working or sleeping of an underground well logging instrument is a regular opening and closing command for controlling a mud driving pump through a control command after a ground system is encoded, so that an accelerometer sensor in a communication module in the well logging instrument generates a regular signal, a microprocessor decodes the signal, recognizes a ground control signal, sends a control command signal to a well logging instrument string and controls the working or sleeping of the instrument string.
2. The method of claim 1, wherein the accelerometer signal codec controlled storage logging tool of the accelerometer signal codec controlled storage logging tool employs a Pulse Position Modulation (PPM) coding method during the coding of the surface system, and the Pulse Position Modulation (PPM) coding method is to use the position where the pulse appears to represent different binary data, that is, different binary data are expressed according to the length of the interval between the pulses; the microprocessor carries out filtering processing on the acquired signals of the accelerometer sensor, obtains original signal code signals through an envelope detection method, a sampling decision device and a decoder, obtains control command signals of a ground system through calculation processing, and sends control commands to a logging instrument string connected behind.
3. The method as claimed in claim 1, wherein the memory logging tool controlled by the accelerometer signal codec of the memory logging method controlled by the accelerometer signal codec employs a pulse position modulation coding method PPM, the pulse position modulation coding is a method of transmitting information as a data stream at time intervals; in general, 1 pulse represents 1 hexadecimal number (0 to F), the specific number of which depends on its position, i.e. on the time interval between it and the last pulse; the rule is as follows: the last pulse ends and a pulse appears after 2 times the standard pulse width recovery time, which represents "0"; delay by 1 standard pulse width occurrence, representing a "1"; by analogy, if a pulse occurs 15 pulse widths later, this pulse represents "F"; s represents a synchronous pulse, and the time interval is a fixed value; m denotes the data pulse interval: m ═ 2T + nxt seconds; where N is a hexadecimal number from 0 to F, T is the standard pulse width, and 2T represents the recovery time of the pulse.
4. The accelerometer signal codec-controlled storage logging method of claim 1, wherein the microprocessor of the accelerometer signal codec-controlled storage logging method performs a band-pass filter (BPF) on the acquired signal x (t) of the accelerometer sensor, and outputs an envelope after envelope detection; and then high-frequency clutter is filtered by a low-pass filter LPF, an original signal code signal is obtained by a sampling decision device and a decoder, a control command signal of a ground system is obtained by calculation processing, and a control command is sent to a logging instrument string connected behind.
5. A computer device, characterized in that the computer device comprises a memory and a processor, the memory storing a computer program which, when executed by the processor, causes the processor to carry out the steps of: the command for working or sleeping the underground logging instrument is that the mud driving pump is controlled to be regularly started and closed through a control command after a ground system is coded, so that an accelerometer sensor in a communication module of the logging instrument generates regular signals, the signals are decoded through a microprocessor, ground control signals are identified, control command signals are sent to a logging instrument string, and working or sleeping of the logging instrument string is controlled.
6. A computer-readable storage medium storing a computer program which, when executed by a processor, causes the processor to perform the steps of: the command for working or sleeping the underground logging instrument is that the mud driving pump is controlled to be regularly started and closed through a control command after a ground system is coded, so that an accelerometer sensor in a communication module of the logging instrument generates regular signals, the signals are decoded through a microprocessor, ground control signals are identified, control command signals are sent to a logging instrument string, and working or sleeping of the logging instrument string is controlled.
7. A storage logging system for performing accelerometer signal coding and decoding control of a storage logging method for performing accelerometer signal coding and decoding control according to any one of claims 1 to 4, wherein an MCU master control module in a communication module of the storage logging system for performing accelerometer signal coding and decoding control comprises an accelerometer sensor; a Flash memory chip; the microprocessor is respectively connected with the accelerometer sensor and the Flash memory chip, and the signals of the accelerometer sensor collected by the microprocessor are decoded and are analyzed and processed to obtain useful information; sending a control command to a logging instrument string connected behind, and storing the calculated information into a Flash chip; the power supply module is used for supplying power to the power supply control module, and the power supply control module is used for supplying power to the MCU main control module.
8. A dual laterolog tool equipped with the accelerometer signal codec controlled storage logging system of claim 7.
9. A natural gamma logging tool incorporating the accelerometer signal codec controlled storage logging system of claim 7.
10. An AC compensated acoustic logging tool equipped with an accelerometer signal codec controlled storage logging system according to claim 7.
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| CN102518427A (en) * | 2011-12-06 | 2012-06-27 | 中国石油天然气股份有限公司 | Plunger underground running state tracking system for gas production and working method thereof |
| CN202451141U (en) * | 2012-02-14 | 2012-09-26 | 北京欧盛文石油设备有限公司 | Direct-reading/ storage-type gyro inclinometer |
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| CN106197747A (en) * | 2016-07-08 | 2016-12-07 | 北京环宇博远科技发展有限公司 | The power overhead network monitoring temperature sensor circuit of a kind of duplicate supply pattern and temp measuring method |
| CN110764525A (en) * | 2019-12-18 | 2020-02-07 | 闽江学院 | Unmanned aerial vehicle flight control system based on skynet number one |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113376646A (en) * | 2021-06-22 | 2021-09-10 | 中国科学院光电技术研究所 | Laser ranging and communication integrated laser radar |
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