摘要
目前国内外发现的绝大多数泥质岩裂缝油气藏都分布在以暗色泥岩及页岩为主的生油岩中 ,常富含有机质、钙质或硅质矿物 ,其有机碳丰度一般为 1 0 ～ 2 0 ,有机质类型多样 ,镜质体反射率多在 0 5 ～ 1 3 。构造裂缝、超压微裂缝和成岩收缩缝是主要裂缝成因类型。盖层主要为裂缝不发育的泥岩、膏岩、盐岩等。圈闭类型主要为背斜圈闭及单斜圈闭。由于大量的油气残留在生油岩中 ,所以 。
Almost all fractured mudstone reservoirs found both in and outside China are distributed in source rocks which are mainly composed of mudstones and shales, abundant in organic matter, calcareous and siliceous minerals. The abundance of organic carbon is 1.00/0～200/0in common with various types and their vitrinite reflectance is 0.50/0～1.30/0.There are three main genetic types of fractures which are structural,overpressured and diagenetic contraction ones in the source rocks. The mudstone reservoir caprocks are made up of non fractured mudstones, gypsum and halite rocks. Anticline and monocline are major trap types. The fractured mudstone reservoirs are believed to have great source potential due to a great deal of hydrocarbon remained in the source rocks.
出处
《石油与天然气地质》
EI
CAS
CSCD
北大核心
2002年第4期336-338,347,共4页
Oil & Gas Geology
基金
国家重点科技攻关项目"中国中部深盆气成藏机制及潜力评价"(项目编号 96-110 -0 1-0 4)的一部分
"油气藏地质与开发工程"国家重点实验室资助项目编号为 96-11
关键词
泥质岩裂缝油气藏
成藏条件
资源潜力
生油岩
构造裂缝
超压微裂缝
成岩收缩缝
fractured mudstone reservoir
source rock
structural fracture
overpressured fracture
diagenetic contraction fracture
source potential
