摘要
利用Archie公式进行常规测井地质解释时必须事先确定m、a和n、b这4个指数的值,通常的做法是根据研究工区的实验和统计资料,确定该地区固定不变的m、a和n、b值。然而,它们是随着工区的不同以及同一工区内各储集层段的不同特征而变化的,因此给定固定值的常规做法有很大的人为误差。所提出的"基于盒维数的测井曲线刻度线网格加密法",利用储集层段测井曲线计算出来的分数维来求取可变的m、a和n、b参数,以代替常规不变的m、a和n、b参数,可以进行更为精细的定量化测井地质解释,从而能较为客观地反映储层储渗特征的真实情况。
The values of four indexes including m,a,n and b must be determined beforehand when performing conventional log interpretation with the Archie Formula. The common approach is to calculate the fixed values of m,a,n and b in the study area by using the experimental and statistical data. However,the values of these indexes are variable in different study areas and even in different reservoir intervals in the same area,thus the common approach of assigning them fixed values may cause large artificial errors. A 'box dimension-based calibration tail grid refinement ' method is proposed to calculate variable values of these parameters by using the fractal dimensions obtained from well logs of the reservoir intervals. It can perform more detailed quantitative geologic interpretation,thus can reflect the real porosity and permeability of reservoirs.
出处
《天然气工业》
EI
CAS
CSCD
北大核心
2008年第12期41-43,共3页
Natural Gas Industry
基金
四川省重点学科建设项目(编号:SZD0414)的资助
关键词
测井曲线
分维学
地质解释
参数
方法
well log,fractal dimension,geologic interpretation,parameter,method
