鄂尔多斯盆地旦八油区长3油藏储层特征研究.PDF

勘探开发 2016年第2期 鄂尔多斯盆地旦八油区长3油藏储层特征研究 1 2 彭晓清　杨旋 1.长江大学工程技术学院　湖北　荆州　434020 2.辽河油田高升采油厂　辽宁　盘锦　124125 摘要：旦八长3油藏位于陕西省志丹县境内的旦八镇东南区域，其构造背景为一平缓的西倾单斜，构造东高西低，倾角 约半度左右。局部发育呈东西向，低幅度的鼻状隆起带，鼻状构造的上倾方向及侧向岩性、物性逐渐变差，形成上倾方向 岩性遮挡，为油气的聚集提供了良好的条件。旦八地区长3储层主要为低孔、特低渗储层。本区延长组储层物性受多种因素 控制，其中沉积微相、成岩作用以及孔隙结构是影响储层物性最主要的因素。 关键词：旦八长3油藏　储层特征　胶结物　粘土矿物 Study on characteristics of Chang-3 reservoir in Danba，Ordos Basin 1 2 Peng Xiaoqing ，Yang Xuan 1. College of Engineering and Technology ，Yangtze University ，Jingzhou 434020，China Abstract：Danba Chang-3 reservoir is located in south-east area of Zhidan county，Shanxi province，its tectonic background is characterized by gently western-leaning structures.The tectonic pattern is higher in the west and lower in the east，the dip angle is about half a degree or so.The lithology and physical features of locally developed nose-like structure become worse gradually along the up dip and side direction of the structure ，and forms lithologic traps，which provides good conditions for oil accumulation. The reservoir in this area feature low permeability and porosity.The physical properties of the reservoir are influenced by a variety of factors，among which the main ones are sedimentary microfacies，diagenesis and pore structure. Keywords：Danba Chang-3 reservoir；reservoir characteristics；cement；clay minerals 旦八长3油藏位于陕西省志丹县境内的旦八镇东南区 英含量低而长石含量高，导致岩石刚性降低而塑性增强， 域，勘探面积约157km2 ，该区发育由东向西倾伏的低缓 经成岩作用后，孔隙度和渗透率降低。 鼻状隆起。旦八区长3油藏是延长油矿西区指挥部所辖的 该区岩石主要粒径以细粒为主。砂岩碎屑风化程度 主力油藏之一。该区块于1997年开始钻探，2001年投入 深，颗粒分选中～好，磨园度较好，多呈次圆状，结构成