水驱油藏均衡驱替开发效果论证  

Theoretical analysis on the performance of equilibrium displacement in water flooding reservoir

作　　者：冯其红[1] 王相[1] 王端平[2] 黄迎松[3] 

机构地区：[1]中国石油大学(华东)石油工程学院,山东青岛266580 [2]中国石化胜利油田分公司,山东东营257000 [3]中国石化胜利油田分公司勘探开发研究院,山东东营257015

出　　处：《油气地质与采收率》2016年第3期83-88,共6页Petroleum Geology and Recovery Efficiency

基　　金：国家科技重大专项"整装油田特高含水期提高采收率技术"(2011ZX05011-002);长江学者和创新团队发展计划"复杂油藏开发和提高采收率的理论与技术"(IRT1294)

摘　　要：注水开发是目前油田最主要的开发方式之一,受地层、流体、井网等条件的影响,注入水在地下驱替不均衡。油田进入高、特高含水开发阶段,剩余油分布越来越复杂,传统的开发调整措施面临较大的困难。生产实践表明,注入水在地下驱替的均衡程度与油藏开发效果密切相关,为此提出均衡驱替的概念用以指导油田开发调整方案设计,但目前主要是基于经验的定性认识,缺少定量的、理论上的论证。因此,基于油藏工程和渗流力学理论,首先推导注水开发过程中各注采方向累积注水量与累积产油量的关系式,来描述各注采方向的驱替动态;然后推导各注采方向的驱替动态和油田开发净现值的关系式,并对其进行分析;最后推导均衡驱替注采井距及注采压差优化设计公式。Water flooding is one of the most important ways to develop oilfields currently. Influenced by reservoirs,fluid,well pattern and other conditions,water displacement in different directions are obviously different from each other. Whenwater flooding reservoir entered to high and extra-high water cut stage,the remaining oil distribution becomes more andmore complex,and traditional development adjustment methods may not be applicable. Practices of oilfield development in？dicate that the production performance is closely related to the equalization degree of displacement by injected water. Theequilibrium displacement concept was proposed and used to guide the design of production plan. However,the relationshipbetween the displacement equalization degree and the development performance was mainly studied on the basis of qualita？tive analysis but lacking of quantitative and theoretical analysis. Based on reservoir engineering and seepage flow mechan？ics theory,the relationship between the cumulative water injection and cumulative oil production in various injection-pro？duction directions during the water flooding was derived to describe the displacement dynamics. Then the relationship be？tween the net present value and the displacement dynamics was derived and analyzed. Moreover,formulas for well spacingand optimization design of injection-production pressure difference was given to achieve equilibrium development.

关 键 词：水驱 油藏开发 均衡驱替 注采井距设计 注采压差优化设计 

分 类 号：TE341[石油与天然气工程—油气田开发工程]