民和盆地巴州坳陷储集层成岩作用

DIAGENESIS OF RESERVOIRS IN BAZHOU DEPRESSION, MINHE BASIN

刘林玉 邸世祥 薛祥煦

Liu Linyu Di Shixiang Xue Xiangxi

民和盆地巴州坳陷储集层的成岩作用强烈。河口组-大通河组上段机械压实作用较强,主要为方解石胶结,粘土矿物虽分布普遍但含量较低,大通河组下段、窑街组机械压实作用较弱,自生粘土矿物和硅质胶结为主,破裂作用较为强烈,有效裂缝发育,是主要的原油产层和高压气层。

The reservoir diagenesis of Bazhou Depression,Minhe Basin was intense.The major diagenesis of clastic rocks in the Hekou Formation and the upper section of the Datonghe Formation was mechanical compaction and calcite cementation.The major diagenesis of the lower section of the Datonghe Formation and the Yiaojie Formtion was authigenic clay and quartz mineral cementation and fracturing.The primary pore texture of the reservoirs was destroied by diagensis.The fracturing transformed the reservoirs of the lower section of Datonghe Formgtion and the Yiaojie Formation into dense fracture reserviors.

10.11743/ogg19990113