欢北杜家台低渗透油藏储层非均质性研究

发布时间：2018-05-30 01:16

本文选题：低渗透 + 储层非均质性　；参考：《东北石油大学》2016年硕士论文

【摘要】：欢北杜家台油田属于特低渗透油藏,经过长时间的注水开发,现已进入特高含水阶段,由于杜家台油藏受到储层非均质性等地质因素影响,在油田注水开发过程中,油藏内储量在纵向上的动用程度差异大,大部分高渗储层发生水淹水窜现象严重,剩余油受储层非均质性影响,分布规律复杂。正因为如此,本文对杜家台油藏进行了储层非均质性的研究,同时揭示了油水的运动规律和对剩余油分布的影响,找到受不同非均质模式影响下的剩余油富集部位,为后期欢北杜家台油藏剩余油挖潜提供一定的依据。本文主要对研究区储层非均质性及其基本性质进行了一定的研究,同时对研究过程进行了详尽的描述。首先从工区沉积学方向入手,对杜家台地区的沉积微相类型及其特征进行了详尽的描述,并对沉积过程中出现的成岩作用展开了一定的分析与探讨。结合工区构造演化史可以认为其低渗透储层非均质性的主要影响因素有沉积环境、成岩作用和构造作用三个方面。从层内、平面、层间和微观四个角度对储层的非均质性进行了定量分析,总结出研究区低渗透储层4种非均质模式3种孔隙结构类型及其主要分布相带。在对储层非均质性研究成果及生产动态资料分析的基础上,对储层非均质性对剩余油分布的控制作用进行了分析,认为平面上剩余油主要分布在河道砂体边缘和注采井网不完善区及不同相带的拼接部位;在纵向上剩余油主要存在于物性较差、非均质相对较强的部位。论文研究成果为提高杜家台油藏油气采收率具有重要的指导意义。
[Abstract]:Huanbei Dujiatai Oilfield belongs to ultra-low permeability reservoir. After a long period of water injection development, it has now entered the stage of extremely high water cut. Due to the influence of geological factors such as reservoir heterogeneity, Dujiatai reservoir is in the process of oilfield water injection development. There is a great difference in the production degree of reservoir reserves in longitudinal direction. The phenomenon of water-flooded and water-channeling occurs seriously in most high-permeability reservoirs. The remaining oil is influenced by reservoir heterogeneity and the distribution law is complex. For this reason, the reservoir heterogeneity of Dujiatai reservoir is studied in this paper. At the same time, the movement law of oil and water and its influence on the distribution of remaining oil are revealed, and the enrichment sites of remaining oil under the influence of different heterogeneity models are found. It provides some basis for exploiting the remaining oil potential in Huanbei Dujiatai reservoir. In this paper, the reservoir heterogeneity and its basic properties in the study area are studied, and the research process is described in detail. Starting with the direction of sedimentology in the working area, the types and characteristics of sedimentary microfacies in Dujiatai area are described in detail, and the diagenesis occurring in the sedimentary process is analyzed and discussed to a certain extent. Combined with the structural evolution history of the working area, it can be concluded that the main factors affecting the heterogeneity of its low permeability reservoir are sedimentary environment, diagenesis and tectonic process. The heterogeneity of reservoir is quantitatively analyzed from four angles of intralayer, plane, interlayer and microcosmic, and three kinds of pore structure types and their main distribution zones are summarized in four kinds of heterogeneity patterns of low permeability reservoirs in the study area. Based on the analysis of reservoir heterogeneity and production performance data, the controlling effect of reservoir heterogeneity on remaining oil distribution is analyzed. It is considered that the remaining oil on the plane mainly distributes in the edge of the channel sand body, the imperfect area of injection-production well pattern and the splicing position of different facies zones, and the remaining oil mainly exists in the parts with poor physical properties and relatively strong heterogeneity in longitudinal. The research results of this paper have important guiding significance for improving oil and gas recovery in Dujiatai reservoir.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TE348

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