摘要
绿泥石膜在鄂尔多斯盆地M油田三叠系延长组2段储集砂岩中多有出现。结合M油田区域地质资料及延长组2段储层岩心薄片研究得出:绿泥石膜形成于早成岩时期,该层段孔隙度随着绿泥石膜含量的增加而增大,对该地区储层孔隙度具有建设性作用。这种作用主要体现在抑制石英次生加大、增加颗粒间抗压实强度、抑制压溶以及挤占碳酸盐岩胶结物生长空间3个方面。
Chlorite film developed well in the reservoir sandstone in the second member of Triassic Yanchang Formation in Ordos Basin. According to the regional geologic information and core slice observation, it is concluded that chlorite film formed in the early diagenetic stage, and the porosity increased with the increasing of chlorite film content. So chlorite film takes a constructive diagenesis on the reservoir porosity in this area. This effect is manifested mainly in three aspects： repressing the quartz overgrowth, enhancing the mechanical strength of rocks and resistance to compaction, and repressing the pressure solution by occupying the space of carbonate cement.
出处
《岩性油气藏》
CSCD
2008年第4期71-74,共4页
Lithologic Reservoirs
