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基于数值模式匹配法的过套管电阻率测井响应层厚和围岩影响

, PP. 256-262

Keywords: 过套管电阻率测井,数值模式匹配法,层厚,围岩,校正方法

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Abstract:

过套管电阻率测井能够有效测量金属套管外地层电阻率,对国内油气田的剩余油评价和动态监测具有重要意义。采用数值模式匹配法(NMM)对层厚和围岩对过套管电阻率测井响应的影响进行了分析,数值模拟结果表明当目标地层厚度大于电极距时,地层和围岩电阻率的差异对测井影响不明显,视电阻率曲线可以反映真实的地层信息。当目标地层厚度小于电极距时,地层和围岩电阻率的差异越大,测井响应数值和地层真实值差别越显著。在数值计算的基础上建立了层厚和围岩影响校正图版,提出了采用校正图版进行层厚和围岩校正的方法。

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