摘要：

基于53口井310余块储集层砂岩样品的分析研究，指出泰州组储集层存在着压实(压溶)、胶结和溶蚀等成岩作用，但在不同位置成岩作用的表现有所不同。海安凹陷以胶结和溶蚀作用为主，压实与压溶作用不太明显;高邮凹陷的压实程度较海安凹陷强烈。压实作用使得高邮凹陷泰州组储集层孔隙度在2 400～2 800 m处于10%左右，而海安凹陷为10%～20%。海安凹陷和高邮凹陷泰州组储集层目前处于中成岩阶段A期。储集层质量主要受原始沉积环境和成岩作用的综合影响。压实作用和胶结作用均可降低孔隙，但当碳酸盐胶结物含量小于15％时，胶结作用对储集层质量影响较小。碳酸盐胶结物和长石颗粒溶蚀形成了大量的粒间溶孔。海安凹陷有利储集层主要分布在西北部和东部三角洲前缘砂体和滑塌浊积扇砂体中，高邮凹陷有利储集层主要分布在南部扇三角洲前缘砂体中。

Abstract:

Abstract  Based on the analyses of over 310 sandstone samples from 53 well, the Taizhou Formation reservoir in the Subei Basin experienced burial (pressolution) , cementation and dissolution process, while the diagenesis showed different characteristics at different locations. The Haian Sag located in eastern part of Subei Basin is dominated by cementation and dissolution, with nonobvious burial and pressolution. The burial extent in the Gaoyou Sag is stronger than that in the Haian Sag. The reservoir porosity of the Taizhou Formation in Gaoyou Sag was about 10% at depth of 2400～2800 m, while was about 10% ～20% in Haian Sag. Currently, the Taizhou Formation in the Haian Sag and Gaoyou Sag is at the age A of mid-diagenetic stage. The reservoir quality is mainly controlled by comprehensive influence of the initial sedimentary environment and diagenesis. Burial and cementation both can reduce the pore space, but when the carbonate cements content is lower than 15%, ementation has smaller influence on the reservoir quality. The carbonate cements and feldspar grains created a great deal of intergranular pores. The favorable reservoir in the Haian Sag in mainly distributed in the northwestern and eastern delta front sandbodies and turbidity fan sandbodies, while in the Gaoyou Sag, it is distributed in southern fan delta front sadnbodies.