鄂尔多斯盆地西缘麻黄山地区延8储层特征  

Reservoir Characteristic of Yan-8 Formation in Mahuangshan Area of Western Ordos Basin

作　　者：丁晓琪[1] 张哨楠[1] 刘朋坤[1] 邓礼正[1] 

机构地区：[1]成都理工大学油气藏地质及开发工程国家重点实验室,四川成都610059

出　　处：《地球科学与环境学报》2010年第1期65-69,共5页Journal of Earth Sciences and Environment

摘　　要：通过对延8储层铸体薄片、扫描电镜、孔渗测定、压汞资料等分析,延8储层具有以下特征:研究区北边富长石、南边富石英,具有不同的物源;砂岩粒度以中粒为主,细粒和粗粒次之;主要的储集空间为粒间孔和粒内溶孔;由于大量的长石、岩屑被溶,孔隙度、渗透率不呈正态分布,均偏大,溶蚀作用形成的大量微孔造成高束缚水饱和度,产纯油或含水率极低;砂体厚度、岩石相和成岩作用共同控制着储集层的物性。结果表明,位于河道中部弱胶结的中砂岩具有良好的储集性能。Yan-8 Formation is an important explored layer in Mahuangshang area of western Ordos Basin. Based on cast thin section, scanning electron microscope, porosity and permeability determination and mercury penetration, characteristic of Yan-8 formation was discussed. It includes that plagioclase rich in north and Quartz rich in south have different provenance; loam grained is the main compost in sand rock, followed by finegrained and coarse grained; the main reservoir was intergranular pores and intragranular dissolved pores; because of dissolved feldspar and rock debris, porosity and permeability are overextended and not normal distribution, a large number of micro pore caused by dissolution results in a high irreducible water saturation, production of pure oil or moisture content are very low; sand body thickness, rock facies and diagenesis control the properties of reservoir commonly. The result shows that loam sandstone of weak cementation in the middle of river has good reservoir properties.

关 键 词：鄂尔多斯盆地 麻黄山 储层 岩相 

分 类 号：P618.130.21[天文地球—矿床学]