Accelerometer signal encoding and decoding controlled storage type well logging system, method, and application
A technology of signal encoding and decoding and accelerometer, which is applied in the field of storage logging system, can solve the problems of inability to effectively control the working state of downhole instruments, the inability to retract the arm, shut down the instrument, and the inability of logging engineers to control downhole instruments, etc. Achieve the effect of solving data acquisition and large storage of useless data, improving logging timeliness and logging success rate, and improving anti-interference ability
Pending Publication Date: 2021-03-09
中石化石油工程技术服务有限公司 +2
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Problems solved by technology
The logging engineer cannot control the downhole tools when the downhole tools need to be retrieved at the end of the logging
During the well logging process, the wired connection between the surface system and the downhole tool is cut off, and the surface system cannot effectively control the working status of the downhole tool
The support arm cannot be opened or retracted in time, and the state of the battery cannot be controlled, so there are the following obvious defects: 1) It is impossible to retract the support arm and close the instrument, which increases the difficulty of instrument recovery
(2) This set of logging tools uses downhole batteries to provide power for each logging to
Method used
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[0033] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0034] Aiming at the problems existing in the prior art, the present invention provides a storage logging system, method and application controlled by accelerometer signal coding and decoding. The present invention will be described in detail below in conjunction with the accompanying drawings.
[0035] Such as figure 1 As shown, the storage logging method of accelerometer signal encoding and decoding control provided by the present invention comprises the following steps:
[0036] S101: The command to work or sleep of the downhole logging instrument is to control the regular opening and closing of the mud-driven pump throug...
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The invention belongs to the technical field of well logging in oil drilling, and discloses an accelerometer signal encoding and decoding controlled storage type well logging system, a method, and application. An underground well logging instrument work or sleep command is a ground system encoded command, then a mud driving pump is controlled to be regularly started and stopped through a control command, then an accelerometer sensor in a communication module in a well logging instrument generates regular signals, the signals are decoded through a microprocessor, then ground control signals arerecognized, control command signals are sent to a logging instrument string, and the work or the dormancy of the instrument string is controlled. The provided accelerometer signal encoding and decoding controlled storage type well logging instrument aims to solve the problems that the well logging instrument can be switched between a working state and a dormant state, a support arm can be foldedat any time and the like. Therefore, the waste of battery power caused by long-time invalid power supply is avoided, and invalid data acquisition of the well logging instrument and the mass storage ofuseless data caused by the long-time invalid power supply of the well logging instrument are effectively solved.
Description
technical field [0001] The invention belongs to the technical field of well logging in oil drilling, and in particular relates to a storage logging system, method and application of accelerometer signal encoding and decoding control. Background technique [0002] At present, in the process of oil exploration and development, logging instruments need to be lowered into the wellbore after drilling to measure various physical parameters of different well depths in the wellbore, and based on this analysis and judgment of the oil and gas content in formations with different well depths. In horizontal wells and complex wells with smooth tripping and tripping, logging techniques such as pump-out storage logging can be used; in some through-drill pipe logging systems at home and abroad, the surface acquisition system and the instrument are connected by cable. Ability to monitor the instrument during its transport. When the tool reaches the target interval, the logging engineer chec...
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Login to View More IPC IPC(8): E21B47/00E21B47/01E21B47/017E21B47/26
CPCE21B47/00E21B47/01
Inventor 张正玉张钰李阳兵田太华刘兴春李孟来刘殿清向属平刘海东李涛蔺学闵崔光孙玉刚张国轶李国良
Owner 中石化石油工程技术服务有限公司