布伦庙地区上古生界储集层特征及评价

为了解布伦庙地区上古生界储集层的基本特征及展布规律，对其沉积相、岩石学特征、成岩作用、储集空间类型、物性特征及孔隙结构等几方面进行了研究．主要储集层为太原组、山西组及上、下石盒子组．太原组、山西组以扇三角洲沉积为主，少部分海湾潮坪沉积．上、下石盒子组为河道砂体至泛滥平原沉积．太原组储集层岩性为粗～中粒、含砾中～粗粒石英砂岩．山西组为岩屑石英砂岩和石英砂岩．上、下石盒子组为长石石英砂岩、岩屑石英砂岩．储集层孔隙类型以次生溶孔为主，对孔隙形成具建设性的成岩作用是溶解作用．储集层物性特征总体上表现为低孔、低渗特点，孔隙度、渗透率相关性不明显．孔隙结构分析结果以Ⅲ类为主．储集层在纵向上是以下石盒子组相对最好．

Characteristics of the Upper Paleozoic Reservoir in Bulunm iao Area and Evaluation of It

The Upper paleozoic reservoirin Bulunm iao area isstudied in the aspectsofsedim entary facies, petrologic charactoristics, diagenesis, reservoir space type, porosity, perm eability and capillary data. It is show n that the m ain reservoir bed consists of Taiyuan, Shanxi and upper and low er Shihezi form ations. Taiyuan and Shanxiform ations are m ainly deltaic fan deposit, and a little of bay-tide flat deposit. Upper and low er Shiheziform ations are channelsand and flood plain deposits. The reservoirofTaiyuan form ation is coarse ～m edium grain size sand and m edium ～coarse grain size quartz sandstone containing gravel, Shanxi form ationsiscutting quartzsandstone and quartz sandstone, and thatofupperand low er Shiheziform ations is feldspathic quartz sandstoneand cutting quartzsandstone.The pore type ofthe reservoirism ainly secondary so- lutionalvoid. Dissolution hasim portanteffecton the form ation ofvoids. Porosity and perm eability ofthe reser- voir allare low . Porestructureism ainly Ⅲtype. Low erShiheziform ation isthe bestofthereservoirin vertical direction.