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Response simulation and theoretical calibration of a dual- induction resistivity LWD tool 被引量:8

随钻双感应测井仪三维响应模拟及理论刻度(英文)
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摘要 In this paper, responses of a new dual-induction resistivity logging-while-drilling (LWD) tool in 3D inhomogeneous formation models are simulated by the vectorfinite element method (VFEM), the influences of the borehole, invaded zone, surroundingstrata, and tool eccentricity are analyzed, and calibration loop parameters and calibrationcoefficients of the LWD tool are discussed. The results show that the tool has a greater depthof investigation than that of the existing electromagnetic propagation LWD tools and is moresensitive to azimuthal conductivity. Both deep and medium induction responses have linearrelationships with the formation conductivity, considering optimal calibration loop parametersand calibration coefficients. Due to the different depths of investigation and resolution, deepinduction and medium induction are affected differently by the formation model parameters,thereby having different correction factors. The simulation results can provide theoreticalreferences for the research and interpretation of the dual-induction resistivity LWD tools. In this paper, responses of a new dual-induction resistivity logging-whiledrilling(LWD) tool in 3D inhomogeneous formation models are simulated by the vector finite element method(VFEM), the influences of the borehole, invaded zone, surrounding strata, and tool eccentricity are analyzed, and calibration loop parameters and calibration coefficients of the LWD tool are discussed. The results show that the tool has a greater depth of investigation than that of the existing electromagnetic propagation LWD tools and is more sensitive to azimuthal conductivity. Both deep and medium induction responses have linear relationships with the formation conductivity, considering optimal calibration loop parameters and calibration coefficients. Due to the different depths of investigation and resolution, deep induction and medium induction are affected differently by the formation model parameters, thereby having different correction factors. The simulation results can provide theoretical references for the research and interpretation of the dual-induction resistivity LWD tools.
出处 《Applied Geophysics》 SCIE CSCD 2014年第1期31-40,116,共11页 应用地球物理(英文版)
基金 supported by the National Oil and Gas Major Projects(No.2011ZX05020-002)
关键词 Dual-induction RESISTIVITY LWD tool vector finite element method toolcalibration Dual-induction resistivity LWD tool,vector finite element method,tool calibration
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