川中公山庙油田沙一段油藏储层特征研究

公山庙油田沙一段油藏是在川中侏罗系沙溪庙组低孔低渗储层背景下发现的构造岩性复合油藏,其储层的研究对川中侏罗系砂岩油藏勘探具有重要指导意义.文章通过地层及岩性、物性、储集空间及储集类型等方面的系统研究,认为尽管储层基质孔隙度、渗透率均很低,但孔隙结构好,完全具备储渗能力.并在此基础上结合动态测试资料分析指出其储集类型仍属裂缝-孔隙型,首次明确在此低孔低渗储集条件下裂缝-孔隙型砂岩油藏的存在,拓展了川中侏罗系砂岩油藏的勘探思路.

Research on characteristics of reservoirs of Member 1 of Shaximiao Formation in Gongshanmiao oil field, Sichuan, China

The oil reservoir of Member 1 of Shaximiao Formation in Gongshanmiao oil field is a structural-lithologic combination reservoir. It is fond in the low porosity and permeability settings in central Sichuan. The research on the characteristics of reservoir is of great importance. The authors think that the pore structure is good and may offer permeability fully, as the reservoir has low porosity and low permeability, by studying its formation, sedimentary facies, lithology, porosity and permeability, reservoir type, etc. On this basis, the authors point out that it belongs to a fractured-porous reservoir. They confirm firstly that the fractured-porous reservoir exists in the background of low porosity and low permeability, and (develop) the thought of exploring oil and gas in central Sichuan.