鄂尔多斯盆地川口油田川72区块长6储层特征及评价研究  

The reservoir micro-characteristics of Chang 6 in Chuan 72 well block of the Chuankou Oilfield,Ordos Basin

作　　者：杜明[1,2] 高新奎[2] 张昂昂 

机构地区：[1]西安石油大学,陕西西安710000 [2]延长油田股份有限公司,陕西延安716000

出　　处：《内蒙古石油化工》2013年第15期116-119,共4页Inner Mongolia Petrochemical Industry

摘　　要：通过岩心薄片、铸体薄片、扫描电镜及压汞资料分析,研究了鄂尔多斯盆地川口油田川72区块长6油层组的储层岩石学特征、成岩作用及孔隙结构等微观特征,并进行了储层评价。结果表明,川72区块长6储层以长石粉细砂岩和长石岩屑粉细砂岩为主,常见压实、硅质胶结、碳酸盐胶结和次生溶蚀及交代作用,粘土矿物的转化作用也较普遍;储层主要发育原生粒间孔、粒间溶孔、浊沸石溶孔、长石溶孔等4种孔隙类型,孔隙度平均值为8.53%,平均渗透率为1.48×10-3μm2,属具有中-细喉道的小孔隙、低渗、特低渗储层。长62为较好储层,长61为较差储层。The reservoir micro-characteristics of Group Chang6in Chuan72well block of the Chuankou Oilfield,Ordos Basin has been studied in detail from the aspects of petrology,digenesis and pore structure,based on the observation results from the conventional and casting thin sections and SEM as well as the analysis of the mercury-injection data.On this basis,the reservoir evaluation is carried out.The research reveals that the reservoir in this area mainly consist of feldspar and feldspathic lithic siltstone-to-fine sandstone.The most common digenesis process generally includes compaction,siliceous and carbonate cementation,secondary dissolution and metasomatism and the transformation of clay mineral is also common.There are mainly four pore types in the reservoir,including primary intergranular pore,intergranular dissolution pore and dissolution pore both in lomontite and fedspar.The average porosity of the reservoir is 8.53% and the average permeability is 1.48×10-3 μm2.Thus the reservoir in this area has low and extra-low permeability with small pores and medium-fine throats.Therefore,according to the reservoir evaluation results,the Chang61 layer is better than Chang62 layer.

关 键 词：鄂尔多斯 川口油田 长6储层特征 储层评价 

分 类 号：P618.130.2[天文地球—矿床学]