摘要
系统地总结了辐射状分支水平井产能预测研究的始末和历程,认识到齐成伟导出的圆形水平边水油藏中辐射状分支水平井产能预测公式(简称为"圆辐公式")是目前最为先进的公式。产能公式的承袭关系显示:若生产段间距为0,则圆辐公式严格退化为蒋廷学公式或近似退化为程林松公式;若生产段只有1条,则圆辐公式严格退化为Giger公式或近似退化为Борисов公式。根据相似原理用电解质溶液中的电流场模拟了辐射状分支水平井激发的渗流场,认识到:圆辐公式蕴含的产能—参数关系与实测规律一致,且其精度满足工程要求;预测精度随分支生产段条数、长度、径向距离、偏心距的增大而减小。为使圆辐公式方便指导辐射状分支水平井的井形设计与参数优化,提出了"扩径比"和"产能比"2个新概念,并据扩径比与产能比的函数关系绘制了设计图版。最后,总结全文并给出了未来的研究方向。
The paper presents a systematic summary of the origin and developmental process of research work on productivity forecosting of radial multi-lateral horizontal wells.It is recognized that the productivity forecasting formula of radial multi-lateral horizontal wells in a circular horizontal edge-water-driven reservoir derived by Qi Chengwei(hereinafter referred to as Circular-Radial-Formula) is the most effective one to date.It is shown from the degeneration relations between productivity formulae that,if the spacing between production segments is zero,Circular-Radial-Formula degenerates rigorously to Jiang Tingxue formula,or approximately to Cheng Linsong formula;and if there is only one production segment,Circular-Radial-Formula degenerates rigorously to Giger formula,or approximately to Eopxcos formula.Through simulation of flow with the current,the flow field in porous media excited by a radial multi-lateral horizontal well can be measured.It is known from the simulation that,the productivity-parameter relationship implied in the Circular-Radial-Formula is consistent with experimental results,with an accuracy that satisfies engineering requirements;the prediction accuracy is inversely proportional to the number,length,radial distance and eccentricity of production segments.To facilitate the application of the Circular-Radial-Formula to the design of well structure and parameter optimization of a radial multi- lateral horizontal well,turn new concepts are proposed:hole enlargement ratio and productivity ratio,design charte are plotted based on lite functional relation between hole enlargement ratio and pnxiuctivity ratio.Lastly,the future direction of research work is pointed out.
出处
《特种油气藏》
CAS
CSCD
北大核心
2014年第1期1-6,11,共7页
Special Oil & Gas Reservoirs
基金
国家科技重大专项"大型油气田及煤层气开发"重要组成项目之"复杂油气田地质与提高采收率技术"(2011ZX05009)
关键词
渗流力学
复杂结构井
产能预测
齐成伟公式
水电模拟
误差分析
完井优化
mechanics of fluids in porous media
well with complicated structure
productivity prediction
Qi Chengwei formulae
simulation of flow with the current
accuracy analysis
well completion optimization
