测井技术2011，Vol.35Issue(z1)：627-630,4.
增饱和度法对电阻率增大率的影响分析
Effect Analysis of Increasing Saturation Method on Resistivity Increasing Rate
李国瑛 1杜环虹1
作者信息
- 1. 中国石油集团测井有限公司技术中心,陕西西安710077
- 折叠
摘要
Abstract
For tight reservoir with low porous and low permeability, it is difficult to calculate saturation exponent (n) in laboratory core measurement. Taking 20 core samples in a region in Xinjiang as experiments, under the condition of 80000 mg/L formation water salinity, carried out are experiments of their conventional gas-drive decreasing saturation and increasing saturation measurement and analyzed are experiment effects. Analysis results indicate that the law and trend of saturation exponent(n) measured by increasing saturation method are accordant with gas-drive decreasing saturation method. The n value is more reasonal; Correlation between resistivity increases rate and saturation exponent(n) is slightly better than conventional gas-drive decreasing saturation method; The minimum water saturation measured by increasing saturation method is lower than 30%(20% to 30%). So, the increasing saturation method has reliable measurement data, higher precision and simple opertation, and it provides an effective method for core saturation exponent testing of tight reservoirs in laboratory.关键词
岩石物理性质/增饱和度法/低渗透率/饱和度指数/岩电实验测量Key words
rock petrophysical property/ increasing saturation method/ low permeablility/ saturation exponent/ litho-electric experiment分类
天文与地球科学引用本文复制引用
李国瑛,杜环虹..增饱和度法对电阻率增大率的影响分析[J].测井技术,2011,35(z1):627-630,4.
