Determining three-phase permeability—saturation—pressure relations from two-phase system measurements
Determining three-phase permeability—saturation—pressure relations from two-phase system measurements
复制标题
从两相系统测量确定三相渗透率-饱和度-压力关系
DOI：
10.1016/0920-4105(90)90046-6
复制
发表时间：
1990
影响因子：
--
通讯作者：
R. Lenhard
中科院分区：
文献类型：
--
作者：
J. Parker;R. Lenhard
建立了含空气、水和非水相液体(NAPL)的多孔介质中流体流动的数学模型。非滞后的饱和-压力关系用刻度参数函数描述，假定是多孔介质和流体对特有的刻度系数，在三个液相系统中刻度Sw(How)和ST(Ho)或在两个液相系统中刻度Sw(How)和Sw(How)，其中Swand Start是水和总液体饱和度，How和How是NPL-水、空气-NAPL和空气-水毛细管压力，分别从饱和压力函数推导出流体相对渗透率的表达式。考虑了三种由两相体系测量来标定本构模型的方法：(1)直接测量空气-水、空气-NAPL和NAPL-水体系中的饱和-压力关系；(2)直接测量单个两相体系中的饱和-压力关系，根据界面张力数据估计标度系数；(3)利用非线性最优化方法对瞬变两相驱替实验进行数值反演。以对伞花烃和三氯乙烯为非水流体，对这三种方法在两种多孔介质体系中进行了评价。
A mathematical model is outlined for fluid flow in porous media containing up to three fluid phases: air, water and nonaqueous phase liquid (NAPL). Nonhysteretic saturation-pressure relations are described using a scaled parametric function, assumed to be unique to the porous medium and fluid-pair dependent scaling coefficients which scaleSw(how) andSt((hao)in three fluid-phase systems orSw(haw)in two fluid-phase systems, whereSwandStare water and total liquid saturation andhow,haoandhaware NPL-water, air-NAPL and air-water capillary pressures, respectively Expressions for fluid relative permeabilities are derived from the saturation-pressure functions using a generalized Kozeny-Carman-type analysis. Three methods are considered for calibration of the constitutive model from two-phase system measurements: (1) direct measurement of saturation-pressure relations in air-water, air-NAPL and NAPL-water systems, (2) direct measurement of saturation-pressure relations in a single two-phase system with scaling coefficients estimated from interfacial tension data and (3) numerical inversion of transient two-phase displacement experiments using a nonlinear optimization procedure. The three methods are evaluated for two porous media systems with p-cymene and trichloroethylene as the nonaqueous fluids.
影响因子：
5.4
作者：
R. Lenhard;J. Parker
通讯作者：
R. Lenhard;J. Parker