注水开发油藏产量递减影响因素研究

Study on Influence Factors of Production Decline of Waterflooding Reservoir

以江汉油田注水开发油藏为研究对象,针对油区在高含水开发后期产量递减问题,采用油藏工程方法、室内实验及矿产统计归纳方法,建立了高含水后期递减模型,绘制了不同采油速度、不同采液速度下理论递减率图版,分析了采油速度、采液速度对自然递减率的影响。剖析马50井区的地质情况,提出了在高含水开发后期减缓产量递减的措施:完善注采井网,提高注采对应率;以注采调整为主要手段,调整平面产液结构。

Taking waterflooding reservoir in Jianghan Oilfield as the research object,aiming at production decline at late high water-cut stage and using reservoir engineering method,laboratory experiment and mineral products statistical induction method,this paper establishes decline model of late high water-cut stage,draws the plate of theory declining rate at different oil recovery rate and fluid recovery rate and accordingly analyzes their impact on natural decline rate.On the basis of analysis of geological condition in Ma 50 Wellblock,this paper proposes the measures to slow down production decline at late high water-cut stage by improving injection-production well pattern to increase injector-producer connection factor and by using injection-production adjustment method to adjust plane liquid production structure.