复杂断块底水油藏低电阻率油层成因分析及识别方法

Genetic Analysis and Identification Methods of Low Resistivity Layers of Complicated Fault Block Reservoir with Aquifer

以港东开发区二区六断块为例,在对低电阻率油层的成因机理进行分析的基础上,对低电阻率油层识别方法进行研究。研究认为该区低电阻率油层的成因主要为黏土附加导电性、薄层和咸水泥浆侵入,并针对性地提出电阻率动态响应数值模拟法、电阻率曲线重构法及双水模型法对低电阻率油层进行识别,经现场实施,这3种方法对复杂断块底水油藏低电阻率油层的识别与评价有良好的效果。

Taking Block No.6 in Area 2 of Gangdong oilfield as an example,we study identifying methods for low resistivity oil layers based on genetic analysis of low resistivity oil layers.The low resistivity reservoirs are affected by 3 factors which includes additional conductivity of clay minerals,thin layers and invasion of salty mud.The resistivity dynamic responding numerical simulation method,resistivity curves reconstruction method and the dual water model method are proposed to identify low resistivity reservoir.Applications show that these methods are good in identification and evaluation of low resistivity layers in complicated fault block reservoir with aquifer.