A signal excitation device for horizontal principal geostress direction measurement while drilling system
A technology of measurement while drilling and excitation device, which is applied in the directions of measurement, earthwork drilling and production, wellbore/well components, etc. It can solve the problems that cannot meet the needs of shale gas drilling and is expensive, achieve high signal output efficiency, and avoid signal trailing effect
Active Publication Date: 2021-11-12
BC P INC CHINA NAT PETROLEUM CORP +2
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Problems solved by technology
At present, there are no mature technologies and products related to the measurement while drilling in the direction of horizontal principal stress in my country. At present, we can only rent LWD tools from foreign companies such as Halliburton and Schlumberger. rock gas drilling needs
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Embodiment 1
[0047] Horizontal Principal In-situ Stress Direction Measurement System While Drilling
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The invention relates to the technical field of oil and gas logging-while-drilling, in particular to a signal excitation device for a measurement-while-drilling system in the direction of horizontal principal geostress. The excitation signal of the signal excitation device of a horizontal main ground stress direction measurement while drilling system proposed by the present invention is a sine wave signal, and the frequency can be adjusted to be the same as the operating frequency of the ultrasonic transducer to ensure that the signal energy can be converted from the ultrasonic wave to the maximum The transducer is transmitted to the well wall, which can have a high signal output efficiency, and at the same time avoid the signal tailing phenomenon caused by the mismatch between the signal excitation unit and the ultrasonic transducer unit due to the frequency band mismatch.
Description
technical field [0001] The invention relates to the technical field of oil and gas logging-while-drilling, in particular to a signal excitation device for a measurement-while-drilling system in the direction of horizontal principal geostress. Background technique [0002] With the successful development of shale gas in North America, shale gas has become a new hot spot in global oil and gas exploration. In recent years, my country has also attached great importance to shale gas development and strongly supported the development of shale gas development technology research and field tests. [0003] my country's shale gas development is still in its infancy. The two core technologies of shale gas development, horizontal well drilling and reservoir fracturing, have encountered many difficulties and bottlenecks. The poor shape of cracks formed by cracks affects production capacity, etc. [0004] Field tests and related studies have shown that, unlike the development of conventi...
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IPC IPC(8): E21B47/14
CPCE21B47/14
Inventor 禹德洲滕鑫淼盛利民窦修荣艾维平邓乐张连成王磊陈文艺曹冲弓志谦彭烈新
Owner BC P INC CHINA NAT PETROLEUM CORP
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