A Calculation Method for Relative Permeability of Low Permeability Reservoir
作者
罗志锋 黄炳光 王怒涛 尚 立
Authors
Luo Zhifeng, Huang Bingguang , Wang Nutao et al
单位
西南石油大学, 四川成都610500
Organization
Southwest Petroleum University, Chengdu 610500, China
摘要
研究人员曾提出用生产数据计算相对渗透率曲线, 但所述方法只适用于中、高渗
透油藏, 因为低渗透油藏存在启动压力梯度而不适用。文中在考虑低渗透油藏的特性和渗流
理论的基础上, 做出了相应改进, 提出了一种新方法, 反映了低渗透油藏实际的生产动态, 这样
获得的曲线能够真正代表油藏的平均性质。该方法克服了以往研究的局限性, 不仅能获得相
对渗透率比值, 还能获得低渗透油藏的有效启动压力梯度。在此基础上, 还可以对油田的综合
含水率进行有效预测。
Abstract
The relative permeability curve compu ted w ith the production data is g iven by the researcher But the abov e m ethod is only su itab le fo r the m idd le and h igh perm eab ility o il reservo ir, no t suitable for the low perm eab ility oil reservo ir, because low pe rmeability o il reservo ir ex ists the sta rting pressure grad ient. This paper makes certa in im provem ent based on reservo ir character istic and the transfus ion theo ry. Th is m ethod reflects the actual o ilfield production pe rfo rm ance. The curve ob tained like th is can represen t the true ave rage fea ture of o il reservo ir. Th is m ethod can a lso ove rcom e the lim itation w hich was form e rly stud ied. This can not on ly obta in the relative perm eab ility ra tio, but a lso ob tain the effective starting pressure grad ient, w hich can pred ict thew ate r cut in the o ilfield
关键词：
低渗透油藏 相对渗透率曲线 含水率 启动压力梯度;
Keywords:
Low pe rm eab ility, Re la tive perm eab ility curve, W ater cut, Sta rting pressure g rad ient;
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