摘要
卡普沙良群一段主要为扇三角洲沉积。储气砂体微相为辫状河冲积平原亚相的河道砂坝微相、水下辫状平原亚相的水下分流河道微相。它们纵向上多期叠置，侧向迁移频繁，呈连续性较好的席状几何形态。孔隙演变过程中成岩作用的破坏作用主要表现为压实、压溶、碳酸盐胶结、交代、石英次生加大等；建设性作用，主要表现为碎裂作用和深部溶蚀；砂岩的储集空间为次生溶孔；渗滤通道是孔隙喉道及与之结合的裂缝；储集类型是孔隙型。
No. 1 Section of the Kapushaliang Group is dominated by the sedimentary sequencesof fan delta, The microfacies of gas reqervoir sand body mainly consists of channel bar andsubaquatic split-flow channel and they should be attributed to braided river plain and sub-aqtiatic braided plain stibfacics,respectively,They are vertically charactcrized by multiplesuperimposition and latterally by frequent migration,in occurrence of well-sequentialsheet-geometry, Du ring the evolution on of porous reservoir,the katogene by diagenesis in-cludes compaction,pressure solution, cementation and replacement of carbonate and quartzsccondary enlargement while the construction consists of remagenesis and deep dissolu-tion.The reservoir spaces of thc sandstones are dominated by secondary solution openingsand percolation paths are pore throats associated with fractures,briiiging about a of thereservoir porous type.
出处
《石油实验地质》
CAS
CSCD
北大核心
1994年第4期389-396,共8页
Petroleum Geology & Experiment
