Determination of anisotropy of spatial correlation structure in a three-dimensional permeability field accompanied by shallow faults

被引:7
作者
Nakaya, S
Yohmei, T
Koike, A
Hirayama, T
Yoden, T
Nishigaki, M
机构
[1] Shinshu Univ, Fac Engn, Dept Civil Engn, Nagano 3808553, Japan
[2] Kansai Elect Power Co, Kita Ku, Osaka 5308270, Japan
[3] NEWJEC Inc, Chyuoh Ku, Osaka 5420082, Japan
[4] Okayama Univ, Fac Environm Sci & Technol, Dept Civil & Environm Engn, Okayama 7008530, Japan
关键词
geostatistics; spatial correlation structure; permeability of rocks; fault; anisotropy;
D O I
10.1029/2001WR000672
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
[1] Structural planes, such as fractures, bedding planes, schistosity, and so on, induce heterogeneity of permeability field in geologic bodies. One of the ways to demonstrate the heterogeneity is to geostatistically infer the spatial correlation structure. This paper presents a newly developed geostatistical technique for estimating the three-dimensional heterogeneous permeability field. In the presented method, the plane-directional anisotropy of spatial correlation structure of the three-dimensional permeability field is determined by estimating semivariograms in multiplane directions, using limited in situ measurement data of basement rock permeability. A case study of a dam site shows that the spatial correlation of permeability in the direction parallel to the fault planes is greater than that perpendicular to it. Direction of the largest anisotropy of the spatial correlation of the permeability field is concordant with the strike of the major faults.
引用
收藏
页码:35 / 1
页数:14
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