摘要
苏里格气田西区W区块位于鄂尔多斯盆地伊陕斜坡西北部。主要从有效砂体的厚度比例、单砂体分布规模、有效砂体平面展布特征三个面认识该区盒8、山1、山2段的有效砂体展布规律;并从岩石学特征、物性特征、储集空间类型和孔隙结构等方面揭示该区的储层特征。研究认为:盒8下亚段和山1段有效砂体在全区大面积分布,连续性较好;山2段有效砂体分布范围广,但整体厚度较小;盒8上亚段有效砂体欠发育。盒8、山1、山2段储层均属于特低孔超低渗储层;"溶孔+微孔型"孔隙组合在研究区最为常见,其次是"溶孔+微孔+粒间孔型"孔隙组合;储层孔隙结构具有"大孔隙、小喉道、孔喉连通性差"的特点。
W Block of western Sulige Area lies in the northwest of Yishan Slope, Ordos Basin. The distribution regulation of effective sandbody of the He-8, Shan-1 and Shah-2 Member of the block is realized from three aspects including the thickness ratio of effective sandbody, the distribution scale of the single sand body and the features of effective sandbody＇ s plane distribution. Also, the reser- voir characteristics of this block are revealed in terms of petrologic features, physical property char- acteristics, reservoir spaces types and, pore texture and so on. The research suggests that the effective sandbody of lower submember of He-8 Member and Shan-1 Member distributes with better continuity in a large area of the whole block, and the effective sandbody of Shah-2 Member has the exten- sive distribution, while its overall thickness is smaller, the effective sandbody of upper submember of He-8 Member is poor. The reservoirs of He-8, Shah-1 and Shan-2 Member all belong to super-low porosity and ultra-permeability reservoir. The most common pore assembly type is ＂dissolution pore ＋ microporosity type＂, while the second place belongs to ＂dissolution pore ＋ microporosity ＋ interg- ranular pore type＂ in the study area. Characteristics of reservoir pore texture are ＂macropore, small throat, and poor connectivity in pores and throats＂.
出处
《承德石油高等专科学校学报》
CAS
2015年第5期1-4,9,共5页
Journal of Chengde Petroleum College
基金
中国石油科技创新基金项目(碳酸盐岩古残丘储层发育规律及测试模式研究):2011D-5006-0103
陕西省教育厅专项科研计划项目(鄂尔多斯盆地东缘奥陶系碳酸盐岩白云石化与古岩溶的耦合关系研究):14JK1567
西安石油大学博士科研启动项目(古岩溶作用与碳酸盐岩油气藏圈闭的形成):207003
关键词
有效砂体
展布规律
物性特征
储集空间类型
孔隙结构
effective sandbody
distribution regulation
physical property characteristics
types of reservoir spaces
pore texture
作者简介
刘刚果（1984-），男，苗族，重庆人，中国石油长庆油田分公司第四采气厂工程师，西安石油大学地球科学与工程学院在读工程硕士，主要从事天然气开发工作。
