川西坳陷蓬莱镇组储层特征

Reservoir characteristics of Penglai town formation in Western Sichuan Depression

以蓬莱镇组储层为研究对象,通过薄片偏光显微鉴定、孔隙结构特征(图像法)、常规物性分析等手段,研究了新场、马井、什邡地区储层的岩石学、物性和孔隙结构等特征。岩石类型主要有岩屑砂岩、长石岩屑砂岩和岩屑石英砂岩。储层孔隙度平均9.70%,渗透率主要分布在0.1~10m D之间。储集空间主要有粒间孔隙、粒间溶孔和粒内溶孔、铸模孔、微裂缝等。

Taking the Penglai town reservoir as the research object,The characteristics of petrology,physical property and pore structure of reservoir in Xinchang,Ma well and Shifang area are studied by means of thin slice polarizing microscopic identification,pore structure characteristics（image method） and conventional physical property analysis. Rock types are mainly lithic sandstone,feldspar lithic sandstone and lithic quartz sandstone. The average porosity of reservoirs is 9.70%,and permeability is mainly distributed between 0.1 m D^10 m D. The reservoir space mainly consists of intergranular pores,intergranular dissolved pores and intragranular dissolved pores,mold holes and microfractures.