鄂北什股壕地区二叠系下石盒子组储集层评价

RESERVOIR EVALUATION OF LOWER SHIHEZI FORMATION,PERMIAN,AT SHIGUHAO REGION IN NORTH E'ERDUOSI BASIN

为了解什股壕地区上古生界主要含气储集层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。研究结果表明 ,下石盒子组主要为一套近源网状河流沉积。盒 1段为岩屑砂岩及岩屑石英砂岩 ,盒 2段以长石岩屑砂岩为主 ,少量岩屑长石砂岩和岩屑砂岩 ,盒 3段为岩屑砂岩。储集层孔隙类型以次生粒间、粒内溶孔为主。对孔隙形成具建设性的成岩作用是溶解作用。储层物性总体上为中等孔隙度和中等—差的渗透率。孔渗之间具指数相关关系。孔隙结构分析结果以Ⅱ类为主。储集层在纵向上以盒

In order to find out the basic characteristics and distribution rules of the major gas-bearing reservoirs in Upper Paleozoic at Shiguhao region,a research on their sedimentary facies,petrologic property,diagenesis,reservoir space type,petrophysical property and pore structure,etc.,was carried out by the authors.Research results show that Lower Shihezi Formation is mainly a set of proximal braided river deposits.He-1 member consists of lithic sandstones and lithic quartzose sandstones;He-2 member is mainly f...