Error Correction in Geological Model Based on Stratigraphic Interdependency

被引：0
|
作者：
Liang D. [1 ]
Hua W. [1 ]
Zhao Y. [1 ]
Liu Z. [1 ]
Liu X. [1 ]
机构：
[1] School of Geography and Information Engineering, China University of Geosciences, Wuhan
来源：
Diqiu Kexue - Zhongguo Dizhi Daxue Xuebao/Earth Science - Journal of China University of Geosciences | 2023年 / 48卷 / 08期
关键词：
Bayes; Copula; error correction; geologic models; stratigraphic interdependency;
D O I：
10.3799/dqkx.2021.139
中图分类号：
学科分类号：
摘要：
In geological exploration, the bottom interface of deep stratum is not sampled in most boreholes, and incorrect sample information limits the accuracy of geological models. In order to improve the accuracy of geological model, we proposes a method to correct geological model based on stratigraphic interdependency. Due to the formation mechanism of the strata, the morphology of the adjacent strata is similar. Based on this character, the Copula function is used to model the dependence structure of adjacent strata, and the joint distribution model of adjacent strata and the likelihood function of the stratum to be corrected are constructed. In the Bayesian framework, the established interface model is taken as the prior model, and the likelihood function is used to update the prior model to obtain the posterior distribution. In the end, the condition expectation of the interface is calculated as the posterior model. The proposed approach is illustrated through a case study of the geological interface model of the coastal zone near Beihai. The results show that the error of the geological interface model is reduced after model correction. © 2023 China University of Geosciences. All rights reserved.
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收藏
页码：3179 / 3192
页数：13
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