摘要
建立上下3层介质的水平井模型,采用三维有限元方法研究水平井双侧向测井响应。结果表明,水平井双侧向测井响应受井眼位置的影响,井眼位于目的层不同垂向位置时,非厚层的双侧向测井响应差异明显;不同层厚及围岩条件下水平井双侧向测井响应与直井差异较大,且在无侵入条件下深浅侧向电阻率显示明显的幅度差异。在三维数值计算的基础上,建立水平井双侧向测井层厚及围岩影响校正图版,并据此研究水平井双侧向测井层厚及围岩影响校正快速计算方法。利用快速校正公式计算得到的校正图版与基于三维数值计算的校正图版具有很好的相似性,说明该方法可快速、有效地实现水平井双侧向测井响应的层厚及围岩校正。
Based on horizontal well modeling with 3 layers, the 3D finite element method is used to simuIate the response of dual laterolog in horizontal wells. The modeling results show that the response of the dual laterolog is obviously influenced by the borehole position in the target formation. When the borehole position varies, the dual laterolog response of non-thick formation changes. Under conditions of different layer thicknesses and/or different borehole positions, the responses of dual laterolog in horizontal wells are different from that in vertical wells. The deep and shallow resistivity of the dual laterolog exhibits an apparent amplitude difference for the nonqnvaded zone in horizontal wells. Based on the 3D numerical simulation results, the correction charts of dual laterolog responses for layer thickness and shoulder bed are generated, and a fast calculation method for resistivity correction in horizontal wells is proposed. The correction results from proposed method agree well with those from 3D numerical computation. The fast correction method is rapid and effective in layer thickness and shoulder bed correction.
出处
《石油勘探与开发》
SCIE
EI
CAS
CSCD
北大核心
2009年第6期725-729,共5页
Petroleum Exploration and Development
基金
国家科技重大专项(2008ZX05035-02)
山东省自然科学基金(Y2007F25)
中石油中青年创新基金(06E1020)
关键词
水平井
双侧向
测井响应
层厚/围岩
校正方法
horizontal well
dual laterolog
log response
layer thickness/shoulder bed
correction method
