低渗透致密油藏注水开发方式研究

发布时间：2018-04-22 04:01

本文选题：致密油藏 + 双重介质　；参考：《西南石油大学》2015年硕士论文

【摘要】：在我国,目前已发现的低渗透油田占到新发现油气田的一半以上,仅2008年,低渗透原油产量就占全国原油总产量的37.6%,可见低渗透油田已经成为油气开发建设的主战场。注水对提高低渗透油田采收率是一种经济而有效的方法,但由于各油田地质条件的差别,采用何种井型开采或者如何注水才能达到最佳开发效果始终是目前国内外关注的问题。因此,研究低渗透致密油藏注水开发具有重要意义。本文以四川盆地公山庙油田大安寨低渗透致密油藏为研究对象,综合运用渗流力学、油藏工程、数值模拟等多学科的相关知识来研究低渗透致密油藏产能曲线,注水开发方式及井网部署。完成的主要工作如下： (1)利用拉氏变换,叠加原理推导了双重介质直井,水平井,压裂水平井产能模型,并利用C#绘制了产能曲线； (2)利用Eclipse建立了机理模型,分析了表皮因子,各向异性系数,连接因子,水平井段长度等因素对产能的影响； (3)利用正交分析方法,模拟了18种井网部署方案,确定了最优开发方式及注水开发井网； (4)选取典型试验区块,优选了注水参数(注水时机,注水量,注水方式),并模拟了三种井型的产能曲线,与数学模型计算结果拟合较好； (5)对公39区块进行了历史拟合。并在此基础上进行井网部署,计算得到该区块最终的采收率。本文对公39区块开展研究得到的注水开发井网,已用于指导该区块的开发,现场已在该方案指导下,开始布井工作,该井网的最终实施,将有效改善该区块的注水开发效果,显著提高该区块的原油采收率。研究成果对同类油藏的开发有指导和借鉴作用。
[Abstract]:In our country, the low permeability oil field has accounted for more than half of the newly discovered oil and gas field. In 2008 alone, the low permeability crude oil production accounted for 37.6% of the total crude oil production in China. It can be seen that the low permeability oil field has become the main battlefield of oil and gas development and construction. Water injection is an economical and effective method to improve oil recovery in low permeability oil fields. However, due to the difference of geological conditions in various oilfields, the problem of which well type production or how to achieve the best development effect by water injection has always been a concern at home and abroad. Therefore, it is of great significance to study the waterflooding development of low permeability tight reservoir. In this paper, the low permeability tight reservoir of Gongshanmiao Oilfield in Sichuan Basin is taken as the research object, and the productivity curve of low permeability and dense reservoir is studied by using the relevant knowledge of seepage mechanics, reservoir engineering and numerical simulation. Water injection development mode and well pattern deployment. The main tasks accomplished are as follows: 1) the productivity models of dual medium vertical wells, horizontal wells and fracturing horizontal wells are derived by using Laplace transform and superposition principle, and productivity curves are drawn by using C #. (2) the mechanism model is established by using Eclipse, and the effects of factors such as epidermal factor, anisotropy coefficient, connection factor and horizontal well length on productivity are analyzed. (3) by using orthogonal analysis method, 18 kinds of well pattern deployment schemes are simulated, and the optimum development mode and water injection development well pattern are determined. (4) selecting the typical test block, selecting the water injection parameters (water injection timing, water injection rate, water injection mode), and simulating the productivity curves of three types of wells, which is fit well with the results of mathematical model calculation; The historical fitting of Gong39 block is carried out. On the basis of this, the well pattern is deployed and the final recovery factor of the block is calculated. In this paper, the well pattern of water injection development in Gong39 block has been used to guide the development of this block. Under the guidance of the project, well layout has been started, and the final implementation of the well pattern will effectively improve the water injection development effect of the block. The oil recovery of this block is improved significantly. The research results can be used for reference in the development of similar reservoirs.
【学位授予单位】：西南石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE357.6

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