Incorporation of fracture directions into 3D geostatistical methods for a rock fracture system
Incorporation of fracture directions into 3D geostatistical methods for a rock fracture system
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将断裂方向纳入岩石断裂系统的 3D 地质统计方法
DOI：
10.1007/s12665-011-1350-z
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发表时间：
2012-07
影响因子：
2.8
通讯作者：
Sanga, Tomoji
中科院分区：
文献类型：
--
作者：
Koike, Katsuaki;Liu, Chunxue;Sanga, Tomoji
岩石裂隙分布的模拟是地球科学各领域共同面临的重要问题。本文介绍了GEOFRAC，地质统计学方法来模拟裂缝分布，将方向（走向和倾角）的采样裂缝数据的模拟。裂缝位置随机产生的裂缝密度分配的顺序高斯模拟。裂缝方向被转换成一个指标集，包括几个二进制（0和1）的变量和变量压缩使用主成分分析。然后采用普通克里金法估计这些主值的分布，并将结果逆变换到原始指标集的坐标系中。裂缝方向是随机产生的，使用它们的直方图内定义的方向间隔。最后，从模拟的位置和方向确定刻面（断裂元素），并且连接角度和距离公差内的断裂以形成断裂平面。从应用GEOFRAC的断裂数据在菊间花岗岩，日本西南部的案例研究，GEOFRAC被证明是能够描绘一个合理的断裂系统，因为模拟的方向对应以及测量。此外，模拟裂隙系统可用于估算研究场地的水力传导系数，与水力试验结果的平均值基本一致。
Simulating a rock fracture distribution is an important problem common to various fields in geosciences. This paper presents GEOFRAC, a geostatistical method to simulate a fracture distribution by incorporating the directions (strikes and dips) of the sampled fracture data into the simulation. Fracture locations are generated randomly following fracture densities assigned by a sequential Gaussian simulation. Fracture directions are transformed into an indicator set consisting of several binary (0 and 1) variables and the variables are compressed using the principal component analysis. Ordinary kriging is then employed to estimate the distributions of these principal values and the results are back-transformed into the coordinate system of the original indicator set. Fracture directions are generated randomly using their histograms within the defined directional interval. Finally, facets (fracture elements) are determined from the simulated locations and directions, and the fractures within the angle and distance tolerances are connected to form a fracture plane. From a case study of applying GEOFRAC to the fracture data in Kikuma granite, southwest Japan, GEOFRAC was shown to be able to depict a plausible fracture system because the simulated directions corresponded well to those measured. Furthermore, the simulated fracture system was available to estimate the hydraulic conductivity of the study site, which was roughly in agreement with the average of hydraulic test results.
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DOI：
10.1016/j.cageo.2006.02.013
发表时间：
2006-10
期刊：
Comput. Geosci.
影响因子：
--
作者：
K. Koike;Y. Ichikawa
通讯作者：
K. Koike;Y. Ichikawa
DOI：
10.1007/bf01083948
发表时间：
1982-04
期刊：
Journal of the International Association for Mathematical Geology
影响因子：
--
作者：
G. Laslett
通讯作者：
G. Laslett
DOI：
10.1007/bf02082535
发表时间：
1991-06
期刊：
Mathematical Geology
影响因子：
--
作者：
V. Suro-Perez;A. Journel
通讯作者：
V. Suro-Perez;A. Journel
影响因子：
5.4
作者：
J. Long;Peggy Gilmour;P. Witherspoon
通讯作者：
J. Long;Peggy Gilmour;P. Witherspoon
影响因子：
6.2
作者：
DERSHOWITZ, WS;EINSTEIN, HH
通讯作者：
EINSTEIN, HH