南海西部海域文昌A、B油田低阻成因分析

摘要

The authors studied the genetic mechanism of low-resistivity from particle size, mud and clay minerals , pore structure, irreducible water saturation, conductive minerals and thin interbed in Wenchang A and B oilfields of Qionghai uplift in Pearl River Mouth Basin. Comparing the low-resistivity reservoir and normal reservoir, the authors found that the studied area was characterized by fine lithology, heavy mud and high volume ratio of fine-micro pores, and then led to high irreducible water saturation, which was the important reason to affect the low-resistivity of ZJ1 reservoir segment in Wenchang A and B oilfields. The study provides a foundation for qualitative I-dentification and quantitative interpretation of the low-resistivity reservoir.%从粒度、泥质及黏土矿物、孔隙结构、束缚水饱和度、导电矿物、薄互层等6方面对珠江口盆地琼海凸起文昌A、B油田低阻成因机理进行系统研究.通过低阻储层段与正常储层段各方面的对比分析,得出研究区岩性细、泥质重、细-微孔隙体积比例高,进而导致高束缚水饱和度是影响文昌A、B油田ZJ1段储层低阻的重要因素,为后续低阻储层的定性识别和定量解释提供依据.