苏里格气田S6井区山1段储层特征及影响因素

Reservoir characteristics and main controlling factors of Shan1 member of block S6 in Sulige Gasfield

下二叠统山西组1段(简称山1段)是苏里格气田S6井区的主力产气层之一,由于该储层经历了长期的压实、胶结等致密化成岩作用改造,原生孔隙几乎消失,储集物性较差,属低孔特低渗型储层。利用岩心、岩石薄片及其它常规化验资料,对山1段储层岩石学特征、孔隙结构及孔隙类型等进行深入研究,并分析了影响储层性能的主控因素。结果发现,影响山1段储层物性的主要因素为沉积环境、碎屑以及成岩作用的改造,这些因素共同改善或破坏了山1段储层的物性。

The first member of the lower Permian Shanxi formation （ short for Shanl member） is one of major pay zones in block S6 of Sulige Gasfield. After the long - term modification of compaction and cementation, primary pores of the res- ervoir almost vanish. The reservoir belongs to low - porosity and low - permeability reservoirs due to poor physical proper- ties. Using data of core, rock slice, other routine tests, the analytical research was made on petrologic features, pore struc- tures, pore types, and so on. Meanwhile, we analyzed main control factors influencing the reservoir properties. Results indi- cate that the main controlling factors of Shanl member reservoir include sedimentary environment, clastics and diagenesis, which together improved or destroyed the physical properties of Shanl member reservoir.