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Numerical simulations of calibration of a dual-induction resistivity LWD tool |
XU Wei1,2, KE Shizhen1,2, JIANG Ming1,2, YIN Chengfang1,2, LI Anzong3
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(1.State Key Laboratory of Petroleum Resources and Prospecting in China University of Petroleum, Beijing 102249, China;2.College of Geophysics and Information Engineering in China University of Petroleum, Beijing 102249, China;3. LWD Center, China Petroleum Logging Company Limited, Xi 'an 710054, China)
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Abstract: |
Instrument structure influences of a new dual-induction resistivity LWD tool were simulated using the finite element method (FEM), and optimal parameters of calibration loop and correction coefficients of the calibration tank were determined and discussed respectively. The results show that the nonlinear responses of the tool are mainly caused by the drill collar and the reflector, while the amplitude enhancement of signal is mainly caused by the magnetic ring. After calibration, a wide linear response range of the formation resistivity is obtained. The simulation results can provide theoretical references for the research and calibration of dual-induction resistivity LWD tools. |
Key words: logging while drilling induction resistivity logging finite element method tool calibration |
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