下寺湾油田泉59井区长2储层非均质性特征研究论文.doc

下寺湾油田泉59井区长2储层非均质性特征研究 摘 要:雨岔泉59井区位于鄂尔多斯盆地陕北斜坡南部，该区为一平缓西倾单斜，局部发育小型鼻状隆起，长2储层为该区的主力油层之一，属于典型的低孔低渗储层，储层非均质性强。本文结合测井、录井分析资料，采用岩石薄片观察、压汞分析、扫描电镜等实验分析手段，应用沉积学、岩相古地理学、地球物理测井、石油地质学等多学科的理论，对长2储层非均质性特征进行了研究。研究表明：主要孔隙类型为次生溶蚀孔隙，孔喉结构较差，表现为中细孔喉特征，储层的孔隙结构非均质性较强；长2段层内，长21与长22-1小层非均质性强，长22-2中等-较弱；平面上河道砂体表现为带状发育，厚度大，连通形式多样，物性受沉积微相控制，非均质程度中等-较弱；长2层段的层间非均质性整体较强。 关键字：长2油层组储层；沉积微相；微观非均质性；宏观非均质性 Research on Characteristics of Heterogeneity Chang 2 of Quan59 Well Area in Xiasiwan Oil Field Abstract: Yucha quan 59 well area is located in the south of slope of Northern Shaanxi in Erdos Basin. The area is a gently west dipping monocline, partly developed small nose-like uplift, Chang 2 reservoir is one of the main reservoirs of this area, belonging to typically low-porosity and low-permeability reservoir, with strong heterogeneity. According to logging analysis, applying observation of rock thin section, mercury penetration analysis, scanning electron microscope analysis means and other analysis means, based on sedimentology, lithofacies palaeogeography, geophysical well logging,petroleum geology and other multidisciplinary theory, this paper studied heterogeneity of characteristics of Chang 2. Research shows that, firstly, the main pore types is the secondary dissolution pore, pore throat structure is poor, which presented characteristics of middle-thin throat, the heterogeneity of pore structure of reservoir is stronger, Secondly, in Chang 2 layer, the heterogeneity of Chang 2-1 and Chang 2-2-1 layer is strong, while Chang 2-2-2s is from medium to weak;2layer,plane sand body of channel is manifested as herpes development, with large thickness, various forms of communication, property is controlled by sedimentary microfiches, heterogeneity is from medium to weak; the interlayer heterogeneity of Chang 2 layer is strong in all. Key words: Chang2 reservoir; Sedimentary microfiches; Microscopic heterogeneity; Macroscopic heterogeneity目录 前言 1 1区域地质概况 1 1.1 区域构造特征 1 1.2 区域沉积演化史 2 2 地层划分 3 2.1 目