Simulated detection equipment for measurement-while-drilling resistivity logging instrument
A technology of resistivity logging and resistivity, which is applied in the directions of measurement, earthwork drilling, borehole/well components, etc., can solve the problems of low efficiency, low accuracy of calibration and calibration, etc., so as to reduce work intensity and improve measurement Accuracy, the effect of improving accuracy
Inactive Publication Date: 2013-04-03
CHINA NAT OFFSHORE OIL CORP +2
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Problems solved by technology
[0006] The technical problem to be solved by the present invention is to overcome the current deficiencies of low accuracy and low efficiency in the verification and calibration of resistivity logging tools while drilling
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[0031] The implementation of the present invention will be described in detail below in conjunction with the accompanying drawings and examples, so as to fully understand and implement the process of how to apply technical means to solve technical problems and achieve technical effects in the present invention. The embodiments of the present application and the combinations of the various features in the embodiments without conflict are within the protection scope of the present invention.
[0032] like figure 1 As shown, the simulation detection equipment of the LWD resistivity logging tool in the embodiment of the present application mainly includes a coupling coil 11 , a receiving module 12 , a formation simulation processing module 13 , and a transmitting module 14 .
[0033] The coupling coil 11 performs signal transmission with the resistivity logging tool while drilling through electromagnetic coupling.
[0034] The receiving module 12 is connected with the coupling co...
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The invention discloses a simulated detection equipment for a measurement-while-drilling resistivity logging instrument, which overcomes the defect of low verification and calibration accuracy of the existing measurement-while-drilling resistivity logging instrument. In the equipment, a coupling coil carries out signal transmission with the measurement-while-drilling resistivity logging instrument through an electromagnetic coupling; a receiving module receives a signal transmitted by the measurement-while-drilling resistivity logging instrument through the coupling coil; a stratigraphic simulation processing module carries out amplitude adjustment and phase adjustment on the signal transmitted by the measurement-while-drilling resistivity logging instrument to obtain a corresponding relation between the amplitude attenuation value of the signal transmitted by the measurement-while-drilling resistivity logging instrument and the resistivity of a stratum with different detection depths and a corresponding relation between the phase difference of the signal transmitted by the measurement-while-drilling resistivity logging instrument and the resistivity of the stratum with different detection depths; and a transmitting module transmits a response signal coupled with a receiving coil of the measurement-while-drilling resistivity logging instrument and used for simulating the stratum with different resistivities by utilizing the coupling coil. Through the implementation of the invention, the work efficiency and the verification and calibration accurate are improved.
Description
technical field [0001] The invention relates to a detection technology of a resistivity logging tool while drilling, in particular to a simulation detection device of a resistivity logging tool while drilling. Background technique [0002] The resistivity logging tool while drilling can measure the original resistivity value of the formation immediately after the formation is drilled, and can guide the drilling engineer to deal with the drilling program in time. It plays an important role in geological survey and geosteering. For multi-azimuth drilling, resistivity logging while drilling is particularly important. [0003] The resistivity logging tool while drilling is installed in a multi-ton metal drill collar, which is very difficult to handle. The instrument uses high-frequency (1, 2MHZ) transmitting and receiving antennas to work, and the antennas are sealed in the drill collar and cannot be directly connected to the outside world. [0004] The verification and calibr...
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IPC IPC(8): E21B47/00E21B49/00
Inventor 张江涛张国辉李胜赵曦张尧
Owner CHINA NAT OFFSHORE OIL CORP