萨中开发区高台子油层孔隙结构特征参数对驱油效果影响研究

发布时间：2018-03-03 10:19

本文选题：萨中开发区　切入点：高台子油层　出处：《东北石油大学》2015年硕士论文　论文类型：学位论文

【摘要】：萨中开发区经过40多年的注水开发,各类油层得到不同程度动用。随着水驱程度的不断提高,各类储集层的物性发生了明显变化,对开发调整措施的制定将产生一定影响,有必要总结影响高含水期储集层物性变化的主要因素,揭示储集层物性随注水开发过程变化的规律,为三次采油和化学调剖等调整措施方案的制定提供科学依据。高台子油层开发面临着高含水、高采出程度、高递减的“三高”局面,为了控制产量递减速度,延长油田开发有效期,有必要研究一套特高含水期水驱开发规律,以指导油层的后期开发。通过岩心物性实验和岩心专项实验,给出萨中开发区高台子油层和萨葡油层孔隙结构特征、储层矿物成分、粘土含量等,给出萨葡油层和高台子油层不同渗透率岩心的启动压力梯度、相对渗透率曲线、渗流规律曲线、水驱油规律和毛管压力曲线,总结出经过长期水驱之后,萨中开发区岩心物性横向和纵向的变化情况以及高渗透率级别和低渗透率级别岩心本质差异,结合相对渗透率曲线特征、得出高台子油层在低渗透率级别中具有一定的开发潜力。全面认识了高台子油层的发育及沉积特征和开发状况,分析井网开发现状,对比开发效果,给出了高含水后期高台子油层高台子油层注采系统调整潜力不大,水驱提高采收率效果不明显;井网间有一定的补充调整潜力,后期只能通过全面加密调整结合三次采油开发,才能大幅度提高油层采收率。
[Abstract]:After more than 40 years of waterflooding development in Sazhong Development Zone, various types of reservoirs have been used to varying degrees. With the continuous improvement of water drive degree, the physical properties of various reservoirs have changed obviously, which will have a certain impact on the formulation of development and adjustment measures. It is necessary to summarize the main factors that affect the change of reservoir physical properties in high water-cut period, and to reveal the regularity of reservoir physical properties changing with the process of water injection development. It provides a scientific basis for the formulation of adjustment measures such as tertiary oil recovery and chemical profile control. The development of Gaotaizi reservoir is faced with a situation of high water cut, high production degree and high decline. In order to control the rate of decline of production, the development of Gaotaizi oil reservoir is faced with a situation of high water cut, high production degree and high decline. In order to extend the period of validity of oilfield development, it is necessary to study a set of water drive development laws in the period of super high water cut, in order to guide the later development of reservoir. The pore structure characteristics, reservoir mineral composition and clay content of Gaotaizi reservoir and sap reservoir in Sazhong Development Zone are given. The starting pressure gradient and relative permeability curves of the cores with different permeability are given. The percolation law curve, water flooding rule and capillary pressure curve are summarized. After a long period of water flooding, the physical properties of the core in Sazhong Development Zone are changed horizontally and vertically, and the essential differences between the high permeability level core and the low permeability grade core are obtained. Combining with the characteristics of relative permeability curve, it is concluded that Gaotaizi reservoir has certain development potential in low permeability level. The development and sedimentary characteristics and development status of Gaotaizi reservoir are fully understood, and the present situation of well pattern development is analyzed, and the development effect is compared. It is shown that in the late stage of high water cut, the adjustment potential of injection and production system in high water cut reservoir is not large, the effect of water flooding on oil recovery is not obvious, and there is a certain supplementary adjustment potential between wells, and in the latter stage, only comprehensive infill adjustment can be combined with tertiary oil recovery. Only in this way can oil recovery be greatly improved.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE357

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