Estimation method of permeability distributions of rock mass with fracture frequency

摘要

The data on fracture frequency is easy to get at an in-situ investigation, while permeability tests are not carried out so often because of financial limitation. Thus, it is very valuable to establish a technique to estimate the permeability distribution by using a data easily obtained like the fracture frequency. In this paper, an indicator simulation technique of the geostatistics is tried by using the fracture frequency as a soft data. To improve and develop the technique, the discrete fracture network generation method is applied to estimate the fracture frequency distribution. Which parameter among the statistical information of geometry of fracture is important to estimate the permeability distribution is examined. It is found as a result that the density distribution of fracture is most important.