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特高含水油田有效注水增产对策研究
【作者】 陈波；
【导师】 冯国庆；
【作者基本信息】 西南石油大学 ， 油气田开发工程， 2012， 硕士
【摘要】 我国有很大比例的注水开发油田目前已进入特高含水期开采期,开发难度日益增大。如何正确评价注水开发油田的注水开发效果,为有效注水提供正确的指导从而制定合理的增产对策达到提高采收率的目的是目前迫切需要解决的课题。本文以双河油田V下层系为例,从油藏的实际特征出发,运用多种方法评价特高含水期油田的注水开发效果,分析了不同方法的局限性,研究了水驱孔隙倍数在平面上的量化表征,此方法有效突破了以往方法的局限性,实现了从微观定量层面评价注水开发效果,为有效注水提供了依据。本文研究内容主要包括：1)利用经典油藏工程方法评价特高含水期油田的注水开发效果的好坏,指出此方法存在只能从宏观上准确评价注水开发效果的局限性。2)利用油藏数值模拟方法研究了V下层系剩余油分布情况及其特征,为有效注水提供了方向,同时指出此方法虽能从微观上评价注水开发效果但是难以做到准确定量评价只能进行定性评价。3)研究了水驱孔隙体积倍数在平面上的量化表征,使微观定量评价注水开发效果成为可能。分析了V下典型井组的水驱倍数和含水饱和度之间的关系,得到了V下层系出现“拐点”的水驱倍数值和极限水驱倍数值,为有效注水提供了确切的依据。4)根据本文的研究成果,以注水孔隙体积倍数为基础,极限水驱倍数为极值针对V下层系提出了不同的增产对策分析对比不同方案的增产效果,得到最优方案。通过以上研究,初步形成了一套适合于评价特高含水期油田有效注水的科学、有效、合理的方法。针对双河油田V下层系,根据研究结果提出了相应的增产对策方案,并利用油藏数值模拟手段对方案进行了优选。本文的研究成果对特高含水期油田的注水开发具有一定的指导意义。
【Abstract】 Nowdays,a significant proportion of flooding oil field has in Ultra-high Water Cut stage and exploration and development of oil are getting more difficulty. How to evaluate the water injection oilfield’s waterflooding effect correctly, which provide the correct guidance of the effective water injection so as to formulate rational countermeasures to enhance the recovery of the yield is the urgent issue need to address.This paper taking the V lower layer seriers of Shuang He oilfiled as an example,from the actual characteristics of the reservoir using a variety of methods for the evaluation of Ultra-high Water Cut stage oilfield’s waterflooding effect, analysis of the limitations of the different methods, and Study of water flooding pore volume multiple in the plane of the quantitative characterization which breakthrough the limitations of previous methods effectively,realized from the microscopic quantitative evaluation of water flooding effect. The main work of this paper are as follows:1) Using classical reservoir engineering method for the evaluation of Ultra-high Water Cut stage oilfield’s water flooding effect,piont out this method has the limitation that it only can from macroscopical on the accurate evaluation of water injection effectiveness;2) Using the reservoir numerical simulation method to study the oil distribution and characteristics of V lower layer seriers, at the same time, piont out that this method can from the microscopic evaluation of water flooding development effect but difficult to achieve accurate quantitative evaluation which can only a qualitative assessment.;3) Study of waterflooding pore volume multiple in the plane of the quantitative characterization which make microscopic quantitative evaluation of water injection effect becomes possible. Analysis the relationship of waterflooding pore volume multiple and water saturation in typical well group of V lower layer seriers, got a turning point of waterflooding pore volume value and the ultimate waterflooding pore volume value which provides the basis for the water injection exactly;4) According to the research results of this paper, through the basis of waterflooding pore volume multiple, according to the actual characteristics of V lower layer seriers put forward different countermeasure of prompt production, analysis and comparison effect of different schemes in order to obtain the optimal scheme;This paper primarily developed a scientific, effective and advisable method to evaluation of waterflooding effect for the Ultra-high Water Cut stage reservoir. According to the actual characteristics of V lower layer seriers And proposed several scheme for the yield increasing countermeasure and using the reservoir numerical simulation method to obtain the optimal scheme. The research has an important significance to instruct the development of Ultra-high Water Cut stage oilfield.