姬塬-白豹地区低电阻率油层成因分析及解释方法

以认识鄂尔多斯盆地姬塬-白豹地区低电阻率油层的成因机理及精细解释为目的，利用该区岩性薄片分析资料、地层水分析资料及测井解释成果图，对该区延安组和延长组低电阻率油层的成因进行了较详细的剖析，认为地层水矿化度高、储层物性的变化、储层孔隙结构的变化、储层岩石颗粒的变细是延安组低电阻率油层的主要成因。储层物性的变化、储层孔隙结构的变化、储层岩石颗粒的变细、储层泥质含量的相对增高是延长组低电阻率油层的主要成因，进而总结出该区低电阻率油层3种解释方法，即交会法、可动水分析法和核磁共振测井差谱法。实践表明，这3种解释方法对该区低电阻率油层解释是完全适合的。

Origin Analysis & Interpretation Method of Low Resistivity Oil Reservoir in Jiyuan-Baibao Zone

To study origin mechanism of low resistivity oil reservoir in Jiyuan and Baibao oil field in Erdos Basin and interpret the reservoir exactly,data of lithology slice analysis & formation water and logging interpretation result are used and the origin analysis of low resistivity oil reservoir in Yanan and Yanchang formation is made.From the above study and analysis two conclusions are obtained.The first is that the low resistivity oil reservoir of Yanan formation is caused by high formation water salinity,changes of reservoir physical properties,changes of reservoir pore structure and thin granule of reservoir rocks.The second is that the low resistivity oil reservoir of Yanchang formation is caused by changes of reservoir physical properties,changes of reservoir hole structure,thin reservoir rock granule and higher reservoir shale content.Then,according to actual conditions of the Base,the interpretation methods such as intersection,movable water analysis and NMR differential spectrum are put forward;also they are proved as suitable methods for such reservoir.