摘要
文昌A凹陷储集层可分为砂体储集层和裂缝型储集层两大类，测试获高产油气流的主要是珠江组，珠海组滨海相海滩砂体，河口湾潮汐砂坝砂体，珠江组二段炭质（含煤）泥岩裂缝发育段和珠海组一恩平组致密砂泥岩（埋深3500－4700m)裂缝发育段是值得重视的勘探目的层，珠海组一段顶部海相泥岩和珠江组一段上部海侵泥岩为区域性盖层，珠海组一、二段储层的直接上覆海相泥岩，珠江组二段顶部的海侵泥岩及恩平组一，二段湖相泥岩是局部盖层。
The reservoirs in Wenchang A sag can be divided into two types: sandstone and fracture reservoirs. The main tested oil-gas pay zones include littoral facies beach sandbodies and estuarine tidal sandbodies of Zhujiang and Zhuhai formations. The fracture developed intervals of carbargillite in member 2 of Zhujiang formation and tight sandy mudstone (buried depth of 3500-4700m) in Zhuhai-Enping formations are considered as potential exploration targets. The marine mudstone in the top of member 1 of Zhuhai formation, which directly overlies on reservoirs of Zhuhai formation, and transgressive mudstone in upper part of member 1 of Zhujiang formation are regional caprocks in the sag, while the transgressive mudstone in the top of member 2 of Zhujiang formation and lacustrine mudstone of member 1-2 of Enping formation are local caprocks.
出处
《中国海上油气（地质）》
1999年第6期421-428,共8页
China Offshore Oil and Gas(Geology)
关键词
珠江口盆地
文昌A凹陷
储集层
盖层特征
测井解释
裂缝识别
油气地质
sandstone reservoir
fracture reservoir
log interpretation
fracture identification
caprock characteristics
breakthrough pressure
Wenchang A sag
