摘要
岩心室内试验得到的单个样品相对渗透率变化曲线仅表征了某种孔隙结构下的渗流规律,孔隙结构的多样性会产生多种相渗曲线形态,整个储层孔隙结构的非均质性对渗流的影响(即相渗曲线)很难用一个表达式进行描述.现阶段描述相渗曲线的经验公式多对于油藏或油气藏,鲜有对气藏的研究且不能较好地实现相渗曲线的归一化.本文通过等渗点的位置,将符合相渗规律的气水相渗曲线分为三类,并利用自动历史拟合方法实现了对相渗曲线归一化的定量表示.拟合出的综合相渗曲线可以统一反应一个地区的渗流规律,对采收率和流量比的预测有极为重要的意义.
The relative permeability curve of a single sample,obtained through core laboratory testing,only characterize the percolation rule for a very pore structure.The variety of pore structure can produce various relative permeability curves,and it is difficult to use a formula to properly illustrate the influence on percolation caused by heterogeneity of reservoir pore structure.The empirical formulas of relative permeability curve at present are most used for oil or oil-gas reservoirs,but not for gas reservoirs,because the research of gas reservoirs demonstrate that the relative permeability curve can＇t be normalized well.In this paper,the gas-water relative permeability curves which obey the rules of relative permeability are divided into three categories according to the position of isotonic point.And the quantitative express of the relative permeability curve normalization is realized by automatic history fitting method.The fitted curve can uniformly show out the percolation behavior of a region and is very helpful to the prediction of recovery and flow ratio.
出处
《地球物理学进展》
CSCD
北大核心
2015年第1期300-303,共4页
Progress in Geophysics
基金
鄂尔多斯盆地大型低渗透岩性地层油气藏开发示范工程(2011ZX05044)
煤与煤层气地质条件精细探测技术与装备(2011ZX05040-002)联合资助
关键词
残余气
束缚水
饱和度
渗透率
综合相渗曲线
residual gas
bound water
saturation
permeability
integrated relative permeability curve
作者简介
刘丹，女，1990年生，山东德州人，在读硕士研究生，主要从事测井原理和解释工作．（E-mail：danliu_grace@163．com）
通讯作者 潘保芝，女，1962年生，山东齐河人，教授，博士生导师，主要从事测井数据处理及解释方面的研究．（E-mail：panbz@jlu．edu．cn）
