南海西部油田低阻油气层成因及评价方法研究

Survey on Origin and Evaluation Methods of Low Resistivity Reservoirs in Oilfields West of South China Sea

通过对南海西部油田岩心观察及常规测井、电成像测井资料分析,除认识钻井液侵入深、油气层厚度小等导致低阻的因素外,还从岩石学入手揭示了沉积环境所导致的低阻油气层。并提出了针对性的评价方法,注重岩心分析,结合区域地质沉积及成岩作用研究,采用适当的测井方式和测井系列,在南海油田的勘探实践中取得了良好的应用效果。

By core observation and data analysis of conventional well logging and electric imaging logging in the oilfields west of South China Sea,it was revealed that low resistivity of oil and gas reservoirs was not only caused by the deep mud invasion and thin oil and gas reservoir,but also by the sedimentary environment.Some effective evaluation methods were summarized.Good exploration results have been obtained in the oilfields in South China Sea,based on laying emphasis on core analysis,integrating regional geology sedimentary and diagenesis study,and selecting appropriate logging methods and series.