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对童氏“7.5”值计算方法及物理含义的探讨
断块油气田
2018年 25卷 第03期
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Title
Discussion on calculation and physical meaning of Tong′s "7.5" value
作者
冯乔
王柏力
孟海燕
曹崇军
孙秋分
赵启阳
单位
中国石油杭州地质研究院，浙江 杭州 310023
Organization
Hangzhou Research Institute of Geology, PetroChina, Hangzhou 310023, China
摘要
基于不同水驱特征曲线对应不同的油水相渗规律，文中研究了2种水驱特征曲线下童氏“7.5”值的计算公式，认为油水相对渗透率与含水饱和度之间的关系式不同，则推导出的童氏“7.5”值也不尽相同，但也存在共同之处，即该值与油水相渗曲线的回归系数及储层和流体的性质有关。通过实例验证，推荐使用乙型水驱特征曲线的油水相渗规律来计算童氏“7.5”值。
Abstract
For different water-flooding characteristic curves, there are different oil-water relative permeability laws. In this paper, the formulae of "7.5" under two water-flooding characteristic curves are studied. The research shows that different relationship formulae between the relative permeability of oil and water and the water saturation results in different values of the "7.5". But there is a common place, that is, this value is related to the regression coefficient of oil-water relative permeability curve and the natures of reservoir and fluid. Verified by applications, the oil-water infiltration law of the B-type water-flooding characteristic curve is recommended to be used to calculate the "7.5" value.
关键词：
油水相渗;
平均含水饱和度;
出口端含水饱和度;
童氏“7.5”值;
Keywords:
oil and water relative permeability;
average water saturation;
outlet water saturation;
Tong′s "7.5" value;
DOI
10.6056/dkyqt201803017
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