水平井随钻电阻率与双侧向响应差异影响因素分析

发布时间：2018-01-04 11:41

本文关键词：水平井随钻电阻率与双侧向响应差异影响因素分析　出处：《地球物理学进展》2017年05期 　论文类型：期刊论文

【摘要】：在大斜度井和水平井中,不同电阻率测井系列测量的结果并非完全一致,测量结果的差异性分析对于正确认识和评价地层非常重要.依据双侧向测井和随钻电磁波测井原理,采用三维有限元素法模拟双侧向在水平井中的测井响应特征,采用积分方程法模拟随钻电磁波电阻率在水平井中的测井响应特征,通过对比分析值模拟结果,造成大斜度井和水平井随钻电阻率与双侧向电阻率测井响应差异的主要因素有:井斜、各向异性、地层界面以及泥浆侵入.随钻电阻率一般受泥浆侵入影响小,但是它在水平井中容易产生极化现象,有助于地层界面识别,同时受各向异性影响明显;而双侧向电阻率在水平地层中对地层界面不敏感,且受各向异性影响相对较弱,但会受泥浆侵入影响严重;正确认识这些差异,可以有效指导水平井的合理解释.
[Abstract]:In large deviated wells and horizontal wells, the results of different resistivity logging series are not completely consistent. The difference analysis of the measurement results is very important for the correct understanding and evaluation of the formation, according to the principle of dual lateral logging and electromagnetic wave logging while drilling. Three-dimensional finite element method is used to simulate the logging response characteristics in horizontal wells and the integral equation method is used to simulate the logging response characteristics of electromagnetic wave resistivity while drilling in horizontal wells. The simulation results are compared and analyzed. The main factors that cause the difference of logging response between well while drilling and dual lateral resistivity are well deviation, anisotropy, formation interface and mud intrusion, while the resistivity while drilling is generally less affected by mud intrusion. However, it is easy to produce polarization phenomenon in horizontal wells, which helps to identify the formation interface and is obviously influenced by anisotropy. The double lateral resistivity is insensitive to the formation interface in the horizontal formation, and is relatively weak by anisotropy, but will be seriously affected by mud intrusion. Correct understanding of these differences can effectively guide the rational interpretation of horizontal wells.
【作者单位】：中国石化石油勘探开发研究院;中国石油塔里木油田分公司勘探开发研究院;中国石油勘探开发研究院;
【基金】：国家科技重大专项“不同缝洞储集体测井精细评价”(2016ZX05014-002-001);“致密复杂碎屑岩储层测井评价技术”(2016ZX05002-005-001);“超深层碳酸盐岩缝洞性储层测井精细评价技术”(2017ZX05005005-005) 中国科学院先导A专项(XDA14010204)联合资助
【分类号】：P631.81;TE243
【正文快照】： 0引言对于地层评价来说,电阻率是反应流体性质变化的一个非常重要的参数.在大斜度井和水平井中,往往有多种电阻率系列:即在地质导向阶段测量的随钻电磁波电阻率以及在钻后电缆测量的双侧向电阻率或双感应等.但是这两种测井系列测量得到的电阻率值并不一定相同,尤其是在薄互层

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