摘要
根据达西定律和阿尔奇公式的物理意义，由毛管电动力学和双水模型理论出发，建立了阿尔奇饱和度指数与储层渗透率、孔隙度、饱和度的相关性理论。利用油水相对渗透率实验曲线，研究了含水饱和度、润湿性、饱和顺序等因素对饱和度指数ｎ 和ｂ的影响。研究结果表明：双电层ζ电位可以影响饱和度指数ｎ 和系数ｂ；对强油湿岩石，饱和度指数ｎ 随含水饱和度增大而减小；对强水湿岩石，饱和度指数ｎ随含水饱和度增大而增大；温度升高，可使指数ｎ减小。对低渗透率油层，束缚水饱和度较高时，指数ｎ 小于１。
According to the theory of capillary electrokinetics and dual porosity water model, the relationship between Archie saturation index and reservoir characteristics is developed. The effect of water saturation and wettability on saturation index( n ) and constant( b ) is studied by experimental curve of oil water relative permeability. The research results show: ①Electric potential ζ in electrical double layer may affect n and b ; ②Saturation index n decreases with an increase in S w for strongly oil wet rocks, but n increases with an increase in S w for strongly water wet rocks; ③Increase of temperature results in a decrease in n and resistivity index I and an increase in b ; ④The value of n is less than 1 and b increases with high irreducible water saturation in low permeability reservoir.
出处
《测井技术》
CAS
CSCD
北大核心
1999年第6期419-423,共5页
Well Logging Technology
关键词
阿尔奇公式
渗透率
孔隙度
油藏
饱和度指数
Archie formula [dual water model] relative permeabillity wettability porosity
