靖边采油厂西部主力油层沉积相及储层特性研究

发布时间：2018-07-06 16:44

本文选题：主力油层 + 岩石学特征　；参考：《西安石油大学》2015年硕士论文

【摘要】：靖边采油厂西部的勘探开发已取得部分进展,但也存在砂体展布变化快,储层非均质性强,同时研究区的勘探程度相对较低,因此摸清研究区主要储层沉积相、储层特征及优质储层分布是当前的主要任务,提高对延安组及延长组主力储层展布特征的宏观把握,提高勘探成功率,为靖边采油厂下一个5年规划、开发部署提供地质支撑。靖采油厂西部主力区域的目的层总体呈现出一个较宽缓的近东西的单斜构造,东高西低,纵向上鼻状构造具有一定的继承性,尚未见断裂发育。延安组延9油层组发育曲流河相沉积,微相有边滩、天然堤、决口扇、牛轭湖、河漫滩;延长组长6、长8油层组发育曲流河三角洲前缘亚相沉积,微相主要发育水下分流河道、水下分流河道间、河口坝、远砂坝、席状砂。在基础理论的指导下,利用岩芯、录井、测井以及各种相关分析化验资料,研究了西部区域的沉积特征、储层物性、微观孔隙结构、非均质性等特征,并对储层进行分类与评价,分析了储层优劣的控制因素,对储层特征与油气富集关系进行了探讨,最后,在对已知重点有效储层解剖基础上,分析有效储层分布规律并进行有利储层分布的预测。研究表明:研究区油层储层的分布主要受沉积微相的控制,砂体厚,孔隙度、渗透率好的储层与沉积物所处的沉积相带都有着密切的关系。同时原始沉积物的成分、粒度、分选性及泥质含量均与沉积物所处的沉积相带也有着密切的关系。即沉积相带的空间展布控制了砂体的分布规律规模,研究区各油层组砂体展布趋势与沉积相带展布趋势一致。
[Abstract]:Some progress has been made in exploration and development in the western part of Jingbian Oil production Plant, but there are also rapid sand distribution changes, strong reservoir heterogeneity, and relatively low exploration degree in the study area. Therefore, the sedimentary facies of the main reservoirs in the study area are clear. Reservoir characteristics and high quality reservoir distribution are the main tasks at present. To improve the macroscopic understanding of the distribution characteristics of the main reservoirs in Yan'an formation and Yanchang formation, and to improve the success rate of exploration, it provides geological support for the next 5 years' planning and development deployment of Jingbian Oil production Plant. As a whole, the target layer in the western main area of Jingjing Oil production Plant presents a relatively wide and gentle monoclinic structure near east-west, low in the east, high in the east and low in the west, and the longitudinal nose structure has certain inheritance, and no faults have yet been developed. The Yanan formation Yan9 oil formation developed meandering river facies, microfacies with banks, natural levees, crevasse fans, Niuyong lake, and floodplain, Yanchang 6, Chang8 oil formation developed meandering river delta front subfacies deposition, microfacies mainly developed underwater distributary channel, Underwater distributary channel, estuary dam, far sand dam, sheet sand. Under the guidance of basic theory, using core, logging, logging and various related analytical and laboratory data, this paper studies the sedimentary characteristics, reservoir physical properties, microscopic pore structure, heterogeneity and other characteristics of the western region. The reservoir is classified and evaluated, the controlling factors of reservoir quality are analyzed, and the relationship between reservoir characteristics and hydrocarbon enrichment is discussed. Finally, on the basis of the known key and effective reservoir anatomy, The distribution law of effective reservoir is analyzed and the favorable reservoir distribution is predicted. The results show that the reservoir distribution in the study area is mainly controlled by sedimentary microfacies, and the reservoir with good sand body thickness, porosity and permeability is closely related to the sedimentary facies zone in which the sediment is located. At the same time, the composition, granularity, sorting property and mud content of the primary sediments are also closely related to the sedimentary facies zones in which the sediments are located. That is, the distribution of sand bodies is controlled by the spatial distribution of sedimentary facies belts, and the distribution trend of sand bodies in various oil reservoirs in the study area is consistent with that of sedimentary facies zones.
【学位授予单位】：西安石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.13

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