Abstract: The study on the critical oil output and oil recovery with no water in the oil reservoir with edge and bottom water is more embedded at present,but the study on the optimization of drawdown pressure of oil well after produced water is not enough.So,a new method for determining the drawdown pressure of oil well with different water-cut sections is presented.A whole oil reservoir is treated as the studied object on the basis of the systematic well test.According to the raising feature of containing water in oil well,the water cut is subdivided into several sections.The correction between increasing rates of containing water and the drawdown pressure in the different water-cut sections was studied.This method is on lots of production data and has a good maneuverability.An effective application of the method can dig the potentiality of oil reservoir during medium high water cut period and may enhance the oil recovery.A favorable effect of application in the CB,ZS and YA oil reservoirs with edge and bottom water has been obtained.

Key words: oil reservoir with edge and bottom water, drawdown pressure, water-bearing escalating rate, system well test, optimization

摘要： 边底水砂岩油藏开发中,对油井临界产量和无水采油期等方面的研究都较为深入,但对油井见水后合理生产压差的优化方法却研究不够.为此,在系统试井方法的基础上,提出了以整个油藏作为研究对象,根据油井综合含水率上升的总体特点,把含水率划分为几个阶段,研究各个阶段含水上升率与生产压差的相互关系,从而确定不同含水率阶段油井合理生产压差的新方法.这种研究是建立在大量生产数据的基础上,因而具有很强的可操作性.此方法的有效应用能充分挖掘油藏在中高含水期的产油潜力,使相应油藏的采收率有较大幅度的提高.这种方法在陈堡、周宋、永安等边水、边底水油藏的应用中都见到了良好的效果.

关键词: 边底水油藏, 生产压差, 含水上升率, 系统试井, 优化方法