桩西油田桩45-1断块沙二段成岩作用对储层物性的影响

通过对岩心、薄片、扫描电镜、压汞实验等资料的分析。总结了桩西油田桩45-01断块的岩性、物性及微观结构特征，重点分析了压实作用、胶结作用、溶解作用等对储层物性的影响。研究认为，研究区沙二段的成岩作用处于早成岩B亚期-晚成岩A亚期，该时期原生孔隙逐渐减少，以次生孔隙发育为特点，并开始出现微裂缝，次生孔隙及微裂缝的发育改善了储层物性。

Influence of Diagenesis on Reservior of the Second Section of Shahejie Formation of Fault Block Z45-1 in Zhuangxi Oilfield

Based on the analysis of core,thin section,SEM and mercury penetration data,we sum up the lithology characteristics,physical property and microstructure characteristics of fault block Z45-1 and mainly analyze the influences of compaction,cementation and dissolution on reservoir property.It can be found that the diagenesis is in subphase B of the early stage to subphase A of the late stage in this area.In this stage,the primary pores are shrinking,and the secondary pores are richer,and the microfractures begin to appear.And the secondary pores and the microfractures improve the reservoir property.