葡萄花油层扩边区席状砂类型砂体有效动用方式研究

发布时间：2018-04-20 06:22

本文选题：水平井 + 低渗透油藏　；参考：《东北石油大学》2015年硕士论文

【摘要】：葡萄花油层扩边区地质储量大,动用程度较低,油层具有砂体厚度薄、平面非均质性强、油水分布复杂、储量分布规模小、且分布零散等特点,属于低丰度低渗透油藏。在目前经济条件下若应用常规开采方式开采未动用区块,将会出现产量低、采收率低等问题,基本无法实现有效动用。为了有效的解决在开采葡萄花油层过程中所出现的产量低、采收率低等一系列问题,必须对葡萄花油层扩边区的储层进行分类评价,并针对不同类型的储层制定不同的开发对策。本文主要是研究席状砂类型砂体的的动用方式,在研究过程发现若采用直注平采的开发方式可以取得较好的经济效益和开发效果。所以,开展水平井可行性研究及水平井参数优化设计研究是动用扩边区中席状砂类型砂体的有效途径和必然选择。本文在借鉴国内各油田水平井开发经验,综合考虑油藏构造、工艺技术、经济效益等因素的基础上,通过储层分类评价、建立三维地质模型、运用油藏工程方法和数值模拟方法等方法,对水平井可行性、水平井参数优化设计、井网形式设计及注水方法等进行了研究,总结出了一套适用于葡萄花油层扩边区以席状砂为主要沉积相区块的水平井优化设计方法,并结合周围油藏条件相似且已开发区块的实际生产情况,进行了开发指标预测和经济效益评价。最后得出结论:采用以水平井为主的直注平采的开发方式,可使动用难度较大储层的采出程度明显提高,能为油田带来较大的经济效益。
[Abstract]:Because of its large geological reserves and low degree of production, the reservoir is characterized by thin sand body thickness, strong plane heterogeneity, complex distribution of oil and water, small distribution scale of reserves and scattered distribution, and belongs to low abundance and low permeability reservoir. Under the present economic conditions, if the unproduced blocks are exploited by conventional mining methods, problems such as low production and low recovery will occur, and it is basically impossible to realize effective utilization. In order to effectively solve a series of problems, such as low yield and low oil recovery, it is necessary to classify and evaluate the reservoirs in the expanded border area of Putaohua reservoir. Different development strategies are made for different types of reservoirs. In this paper, the main purpose of this paper is to study the production mode of sheet sand type sand body. It is found in the research process that good economic benefit and development effect can be obtained if the development mode of straight injection flat mining is adopted. Therefore, the feasibility study of horizontal wells and the optimization of horizontal well parameters are the effective ways and inevitable choices for the production of sand bodies of sheet type in the expanded border area. On the basis of drawing lessons from the development experience of horizontal wells in various oilfields in China and considering comprehensively the factors of reservoir structure, technology and economic benefit, this paper establishes a three-dimensional geological model through reservoir classification and evaluation. Using reservoir engineering method and numerical simulation method, the feasibility of horizontal well, optimization design of horizontal well parameters, well pattern design and water injection method are studied. A set of optimum design methods for horizontal wells with sheet sand as the main sedimentary facies blocks are summarized, and the practical production conditions of the developed blocks with similar reservoir conditions around them are also summarized. The development index prediction and economic benefit evaluation are carried out. Finally, it is concluded that adopting the development mode of horizontal wells with straight injection and horizontal production can obviously improve the recovery degree of the more difficult reservoirs, and bring greater economic benefits to the oil fields.
【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】：TE34;P618.13

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