板桥—合水地区长6储层综合评价

发布时间：2019-04-03 20:14

【摘要】：板桥-合水地区位于鄂尔多斯盆地伊陕斜坡西南部地区,研究区总面积约为5700km2,其三叠系延长组长6储层为目前油田开发中的主力含油层系,该区长6段储层具有低孔隙度、低渗透率、低含油饱和度的特点,属于典型的“三低油藏”。研究区长6储层沉积环境主要以深湖-半深湖相为主,由于区域内总体受到西南、北东物性物源的影响,受物源影响程度的差异造就了板桥-合水地区长6储层现今的砂体展布特征。本文通过资料调研并结合前人的研究对全区400余口井进行了小层精细对比与划分,利用岩心照片、铸体薄片、扫描电镜、粒度分析等实验数据资料对研究区沉积相、构造、岩石学等特征进行了综合研究。利用高压压汞实验、恒速压汞实验、油水相渗实验、核磁共振实验,实现了对储层微观孔隙结构与渗流机理从定性描述到定量表征的过程。建立储层岩性与物性、孔隙性与渗透性、物性与含油性、物性与电性之间的一系列关系。在此基础之上,从储层地质特征、微观孔隙结构特征、微孔渗流特征、局部微构造等方面入手,对影响储层物性的各方面控制因素进行了综合分析。提取具有代表性的物性参数、微观孔隙结构参数、渗透特征参数,利用SPSS统计学软件,选取Q型聚类方法,实现对对储层的类型划分以及综合评价,将储层由好到差分为四类,建立各类型储层综合参数评价表,筛选研究区内优势储层分布区域,为油田下一步的开发、部署、增储上产提供有力依据。
[Abstract]:The Banqiao-Heshui area is located in the southwest of the Yishan slope in Ordos Basin. The total area of the study area is about 5700km2. The Yanchang 6 reservoir of the Triassic is the main oil-bearing series in the current oilfield development, and the Chang-6 reservoir in this area has low porosity. The characteristics of low permeability and low oil saturation are typical "three low reservoirs". The sedimentary environment of Chang-6 reservoir in the study area is dominated by deep lake-semi-deep lacustrine facies, which is influenced by the physical provenance of southwest and northeast of the region as a whole. The distribution of sand bodies in Chang-6 reservoir in Banqiao-Heshui area is caused by the difference of influence degree of provenance. In this paper, more than 400 wells in the whole area have been carefully compared and divided through data investigation and previous studies. The sedimentary facies and structure of the study area have been studied by using the experimental data such as core photo, casting slice, scanning electron microscope, particle size analysis and so on. The characteristics of petrology are comprehensively studied. By means of high pressure mercury pressure experiment, constant velocity mercury pressure experiment, oil-water phase permeability experiment and nuclear magnetic resonance experiment, the process of describing the micro-pore structure and seepage mechanism of reservoir from qualitative description to quantitative characterization has been realized. A series of relationships between lithology and physical property, porosity and permeability, physical property and oil-bearing property, physical property and electrical property are established. On this basis, from the reservoir geological characteristics, micro-pore structure characteristics, micro-porous seepage characteristics, local micro-structure, and other aspects of the control factors affecting reservoir physical properties are comprehensively analyzed. The representative physical parameters, micro-pore structure parameters and permeability characteristic parameters are extracted. By using SPSS statistical software, Q-type clustering method is selected to realize the classification and comprehensive evaluation of reservoir types, and the reservoirs are divided into four categories from good to differential. The comprehensive parameter evaluation table of each type of reservoir is set up, and the dominant reservoir distribution area in the study area is screened, which provides a powerful basis for the development, deployment and increase of reservoir production in the next step of oilfield development, deployment and increase of production.
【学位授予单位】：西北大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.13

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