摘要
西湖凹陷是东海陆架盆地中主要的含油气凹陷之一,该区域最重要的自生矿物是碳酸盐胶结物,对储层的影响至关重要,其主要类型为方解石、铁白云石和菱铁矿。根据碳酸盐矿物阴极发光的特征,结合其碳、氧同位素特征研究了该区碳酸盐矿物的形成环境和成岩特征,方解石是在相对较晚的成岩阶段沉淀的,而铁白云石的胶结作用是在较早的成岩阶段,菱铁矿也是早成岩阶段的产物。
Carbonate cements are the most abundant authigenic minerals in the Palaeogene sandstones in Xihu Sag,which is one of the main petroliferous sags in shelf basin of East Sea. Calcite, ankerite and siderite are the main minerals in carbonate cements. The diagenetie analysis of carbonate cements are based on the cathodeluminescence characteristics, carbon and oxygen isotope analysis. It is concluded that calelte is precipitated during later diagenesis stage and the cementation of ankerite and siderite happens during the earlier diagenesis stage.
出处
《断块油气田》
CAS
2008年第2期1-3,共3页
Fault-Block Oil & Gas Field
基金
国家自然科学基金项目(40672072)资助
关键词
碳酸盐矿物
阴极发光
方解石
铁白云石
菱铁矿
carbonate minerals, eathodelumineseenee, calcite, ankerite, siderite.
