孤岛油田储层建筑结构研究

Fluvial reservoir architectural element analysis of Gudao Oilfield

储层的宏观非均质性是影响剩余油分布的主要因素,而建立在层次分析基础上的储层建筑结构分析法是研究河流相储层非均质性的有效方法。以单砂体为研究单位,对孤岛油田进行了建筑结构研究,很好地解决了孤岛油田储层非均质性的问题,提高了对孤岛油田剩余油分布规律的认识。

According to the theory of hierarchy of stratigraphy,the reservoir of Gudao oil area is divided into ten levels as follows: stratigraphic member,stratigraphic submember,oil-bearing bed,sand set,layer,sandbody,genetic sand,depositional rhythm within genetic sand,assemblage of cross-laminae system,cross-laminae system.Through observation of drill core and analysis of well logging curves embodying reservoir characteristics,six types of architectural elements are identified: main channel sandbody,abandoned channel sandbody,crevasse-channel sandbody,crevasse-splay sandbody,natural levee sandbody and concave flood plain sandbody.Architectural plane maps are finally made on the sandbody level.