Signal excitation device of horizontal principal ground stress direction measurement while drilling system
A measurement-while-drilling and excitation device technology, applied in measurement, earthmoving, wellbore/well components, etc., can solve the problems of inability to meet the needs of shale gas drilling, high price, etc., achieve high signal output efficiency, avoid signal trailing effect
Active Publication Date: 2019-02-12
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 of a horizontal principal ground stress direction measurement while drilling system. An excitation signal of the signal excitation device of the horizontal principal ground stress direction measurement while drilling system is a sine wave signal, the frequency can be adjusted to be the same as the working frequency of an ultrasonic transducer, it is guaranteed that signal energy can be transmitted to the well wall from the ultrasonic transducer to the maximum limit, the high signal output efficiency can be achieved, and meanwhile, a signal trailing phenomenon caused by mismatched frequency bands of a signal excitation unit and an ultrasonic transducer unit is avoided.
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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