东胜气田储层特征研究  

Reservoir Characteristics in Dongsheng Gasfield, Ordos Basin

作　　者：王周红[1] 王东辉[1] 

机构地区：[1]中国石化华北分公司勘探开发研究院,河南郑州450006

出　　处：《天然气技术与经济》2014年第5期9-12,77,共4页Natural Gas Technology and Economy

摘　　要：东胜气田位于鄂尔多斯盆地伊盟北部隆起杭锦旗断阶带北东段,主要目的层为二叠系下石盒子组,为一套冲积扇平原辫状河沉积。下石盒子组颗粒分选好—中等,次棱状,岩石为颗粒支撑,再生、孔隙式胶结颗粒之间接触性质主要为点—线接触,压实、压溶等成岩作用中等,气藏储层孔喉结构复杂,非均质性强,喉道较细,气田储层总体上属于低孔低渗。在本区储层的岩性特征、物性特征、孔隙结构特征研究基础上,结合测井相、沉积微相分析与四性关系特征等研究成果,初步将本区储集层分为4种类型,即Ⅰ、Ⅱ、Ⅲ、Ⅳ类,其中Ⅰ类为好储层,Ⅱ类为较好储层,Ⅲ类为较差储层,Ⅳ类为差储层。Dongsheng gasfield in Ordos Basin is located at northeastern Hanggin Banner faults zone, north uplift in Ikejomong.The target zone is Permian lower Shihezi Formation, which is also the deposition of alluvial-fan plain braided-river facies. In the formation, much grain is characterized by medium to good sorting and subangular in shape; and rocks are grain-supported. The relationship between porous cemented grain and regenerating grain is point to line contact. This reservoir is featured by moderate diagenesis of both compaction and pressure solution, complex pore-throat structure, strong heterogeneity, very fine throat, and generally low permeability and low porosity. Based on its lithological characters,physical properties, and porous structure, combining some analyzed results from well-logging facies and depositional microfacies with'four- property'relation, we can divide this reservoir into four types, including I, II, III, and IV, in which type I is better, good for type II, bad for type III, and worse for type IV, respectively.

关 键 词：东胜气田 下石盒子组 低孔低渗 储层分类 

分 类 号：P618.13[天文地球—矿床学]