摘要
本文利用单井油层的模拟程序,计算出无因次压力恢复值P_(SD)和无因次井壁产量Q_(FD)的理论数值。通过数学方法分析发现,在压力恢复曲线的早期段(包括纯井筒储集阶段和大部分过渡段)中,P_(SD)和Q_(FD)之间存在线性关系,且直线段斜率m~*和无因次生产时问(t_P)_D、无因次井筒储集系数C_D无关。因此,经过数学处理获得了压力恢复曲线早期段的新的解释方法,实例分析表明,这一解释方法是可靠而有效的。
The theoretical values of dimensioness buildup pressure P_(SD) and dimensionlesssandfacc flow rate Q_(FD) are calculated by using a program of single-well reservoirsimulation. It is found by mathematical, analysis that there is a linear relationship between P_(SD) and Q_(FD) of pressure buildup curve(including the pure wellbore storage stageand most of the transition stage)at the early-time stage. Moreover, the slop m~* of thelinear section is dependent On the dimensionless production time (t_p)_D and dimensionnesscoefficient C_D of wellbore storage. A new method for interpreting early-time pressurebuildup curves drawn via the data from well testing is developed. The resuits of applicationof this method in the field show that it is reliable and efficient.
出处
《江汉石油学院学报》
CSCD
北大核心
1989年第2期49-61,共13页
Journal of Jianghan Petroleum Institute
关键词
低渗透油层
试井解释
试井
low permeability reservoir
well testing
interpretation method
pressure buildup curve