摘要
以川北地区二叠系长兴组储层110块物性样品、83块薄片样品以及22块压汞分析数据为基础,通过储层岩石学、储层物性、孔隙结构及储层控制因素等分析研究表明:长兴组生物礁储层主要岩性为生物碎屑灰岩、礁灰岩以及细粉晶白云岩;储集空间类型以次生的晶间孔、粒内溶孔、粒间溶孔以及裂缝为主;储层孔隙度主要介于2%～6%,渗透率主要介于(0.02～0.25)×10-3μm2,属于低孔中—低渗储层;研究区主要为II类储层,其次为III和IV类储层。
On the basis of data analysis of 110 rock samples,83 thin section samples and 22 core mercury injection of Permian Changxing Formation in North Sichuan area and through the analysis and research of reservoir lithology,reservoir physical properties,pore structure and reservoir con-trolling factors,we know that the lithology of Permian organic reef reservoirs is mainly bioclastic limestone,reef limestone and fine-powder dolomite.The reservoir storage space is mainly secondary intercrystal pore,intragranular dissolved pores,intergranular dissolved pores and fractures.The porosity of reservoirs is 2%-6%,and the permeability is mainly(0.02～0.25)×10-3μm2,which belong to middle-low permeability reservoirs.The reservoirs of the study areas mainly belong to type Ⅱ,type Ⅲ and type Ⅳ are the next.
出处
《石油地质与工程》
CAS
2011年第1期28-31,142,共4页
Petroleum Geology and Engineering
关键词
储层特征
孔隙结构
储层评价
长兴组
川北
Reservoir characteristics
pore structure
reservoir evaluation
Changxing formation
north Sichuan
