【摘要】 为提高低电阻率油层测井评价的可靠性,本文选取大港油气田低电阻率油层作为研究对象。通过对储层沉积特征、泥质含量及类型、孔隙结构、泥浆侵入、油层厚度、测井系列和地层水矿化度等影响因素的分析,系统剖析低电阻率油层的成因和机理,揭示低电阻率油层的地质及测井特征,为探索出识别低电阻率油层的有效方法奠定基础。研究表明,原始低电阻率油层的形成与地质作用密切相关;次致低电阻率油层的形成则主要受泥浆侵入深,油层薄,测井系列及高地层水矿化度等外部因素影响。更多还原

【Abstract】 The low- resistively oil seams in Dagang oil-gas field have been studied for the sake of improving the credibility of logging appraisal on it. By analysising the sedimentation characteristics, shale content and type, pore configuration, invasion of mud, core intersection, logging suite and seam water salinity, a systematic research on the forming and mechanism of low-resistively oil seams have been made. On the basis of these research, geologic characteristics and logging features of the low resistively oil reservoirs have been found. These lay the foundation for the effective identifying method. The research shows that the formation of original low resistively-oil seams are closely correlative with the geologic function and the induced formation is mainly affected by the external factors such as the deep invasion of mud, thin of oil layer, logging suite and high seam water salinity.更多还原