沙埝油田沙23断块阜三1亚段油层非均质性评价  

Reservoir Heterogeneity of the 1st Member of Ef_3 in Fault Block Sha23 in Shanian Oilfield

作　　者：李德勇[1] 戴祉平[2] 

机构地区：[1]中国海洋大学海洋地球科学学院,山东青岛266100 [2]江苏油田分公司地质科学研究院,江苏扬州225009

出　　处：《石油天然气学报》2009年第3期36-41,共6页Journal of Oil and Gas Technology

基　　金：国家"863"计划项目(2006AA09Z336)

摘　　要：通过铸体薄片、扫描电镜及X-射线衍射等多项分析测试手段,对沙23断块阜三1亚段油层的岩石学特征、物性特征和孔隙结构特征进行了详细研究,揭示了储层的微观非均质特征,进而对阜三1亚段油层的非均质性进行了评价。研究结果认为,沙23断块阜三1亚段油层主要为长石岩屑砂岩;砂岩储层的物性较好,属于高孔中渗型储层;储层孔喉类型以中孔、中细喉组合为主,孔隙结构质量中等;储层非均质性主要受砂体微相的先天控制,成岩作用的后期影响较小;根据评价标准,沙23断块阜三1亚段油层的非均质性比较严重,层内非均质性、层间非均质性和平面非均质性均以严重非均质性为主。According to the analysis of cast thin section, SEM, X-ray diffraction and so on, the sandstone petrology, reservoir heterogeneity and pore structure of the first member of Funing Formation were studied in detail. The result shows that sandstone type in the studied area is mainly feldspatic litharenite, rarely lithic arkose. The oil sandstone can be evaluated as medium-high worth reservoir as it is of good physical property. The pore throat is composed of middle sized pores and medium-fine throats which indicate that the pore structural quality is preferable. Sand microfacies and diagenesis are the chief influence factors of reservoir heterogeneity. In accordance with reservoir classification criterion, the intrastratal, interstratal and plane heterogeneity of the first member of Ef3 are all very serious.

关 键 词：沙埝油田 沙23断块 储层非均质性 物性特征 孔隙结构 砂体微相 

分 类 号：P618.13[天文地球—矿床学]