子长油田新庄区长2储层主力产层的储层非均质性

Study on the Heterogeneity of Main Producing Reservoir in Chang 2 Reservoir,Zichang Oilfield

以子长油田新庄区的长2储层为研究对象,依据岩心和测井资料分析了长2储层油层亚组长21的储层非均质性。长2储层的构造面貌与陕北斜坡区域构造面貌相似,表现为近东西向宽缓鼻状隆起构造,长21-3小层为主力产层。比较而言,长21储层的层间非均质性弱,层内非均质性强,平面非均质特性较强;其储层砂体平面可划分为透镜状、断续条带状、条带状和大片连通状4种分布类型。

In this paper,the heterogeneity of the Chang 2 sub group 21 reservoir in Xinzhuang section of Zichang Oilfield is studied by core and logging analysis data.The tectonic features of the Chang 2 reservoir are similar to those of the northern Shaanxi slope,which is characterized by a near-East-direction wide nasal structure,and the Chang 21-3 sand is the main force production layer.Core analysis and multi-well evaluation indicate that the Chang 21 reservoir is weakly inter-layer heterogeneity as a whole.The heterogeneity in the layer is strong,and the plane heterogeneity is strong.The plane of reservoir sand body can be divided into four distribution types:lenticular,intermittent strip,strip and large connected type.