东濮凹陷沙河街组碎屑岩成岩作用与有机质演化的关系

DIAGENESIS OF CLASTIC ROCKS IN SHAHEJIE FORMATION,DONGPU DEPRESSION AND ITS RELATION TO ORGANIC MATTER EVOLUTION

东濮凹陷下第三系沙河街组储层在纵向上有三个高碳酸盐含量带和４个次生孔隙发育带。有机质演化产生的ＣＯＺ和有机酸造成浅部储层长石骨架颗粒和碳酸盐胶结物的溶解，产生第一个次生孔隙带；中、深部长石的溶蚀作用形成第２、第３个次生孔隙发育带；深部碳酸盐胶结物的溶蚀构成第４个次生孔隙发育带。

Three high carbonate belts and four secondary pore belts developed vertically in the reservoir rocks of the Eogene Shahejie Formation in Dongpu Depression.Co,and organic acid generated from organic matter evolution dissolved feldspar grains and carbonate cements in shallow beds and formed the first secondary pore belt;the dissolution of feldspar grains in median depth resulted in the second and third secondary pore belts;the dissolution of carbonate cement in deep beds formed the fourth secondary pore belt.