鄂尔多斯盆地东南部石盒子组盒8段储层特征及影响因素  

Characteristics and influence factors of the He 8 reservoir in the Shihezi formation in southeastern Ordos Basin

作　　者：吴春燕 李文厚[2] 贾德生[2] 王娟 张红强 

机构地区：[1]延长石油有限责任公司,陕西西安710075 [2]西北大学,陕西西安710069

出　　处：《特种油气藏》2011年第5期45-48,137,共4页Special Oil & Gas Reservoirs

基　　金："973"国家重点基础研究发展计划"多种能源矿产共存成藏(矿)机理与富集分布规律"(2003CB214602)

摘　　要：从沉积学及储层岩石学特征入手,结合常规岩石薄片、铸体薄片、扫描电镜、孔渗分析、压汞实验分析结果,对鄂尔多斯盆地东南部石盒子组盒8段储层特征及影响因素进行研究。结果表明,该套储层为低孔隙、低渗透率储层,具有排驱压力高、孔喉半径小、孔喉分选性差的特征。储集孔隙类型以残余粒间孔、粒内溶蚀孔为主,晶间孔、微裂隙较少。压实作用、硅质胶结、自身黏土矿物胶结、碳酸盐矿物胶结以及石英的次生加大是导致储层致密的主要因素,而长石、岩屑等的溶蚀作用使储层物性得到改善,微裂缝对储层的储集性影响不大。The characteristics and influence factors of the He 8 reservoir in the Shihezi formation in southeastern Ordos Basin have been studied for sedimentology and reservoir petrology through analyses of thin section,cast thin section,scanning electron microscope,poroperm analysis and mercury penetration test.The results indicate that this reservoir is low porosity and low permeability and characterized by high displacement pressure,minor pore radius,and poor sorting of pore throat.The pore type is dominated by residual intergranular pore and intragranular emposieu,with a little intercrystal pore and microfracture.The main factors resulting in tight reservoir are compaction,siliceous cementation,clay mineral cementation,carbonate mineral cementation and secondary growth of quartz,while the denudation of feldspar and debris had improved reservoir property.Microfracture has no obvious influence on reservoir quality.

关 键 词：储层特征 影响因素 盒8段 石盒子组 鄂尔多斯盆地 

分 类 号：TE122.2[石油与天然气工程—油气勘探]