Construction of Geological Selection Index System and Evaluation Technology of Favorable Area for Underground Coal Gasification

被引：0
|
作者：
Zhou H. [1 ]
Wu C. [1 ]
Jiang X. [1 ]
Wang Z. [1 ]
机构：
[1] Key Laboratory of Coalbed Methane Resources and Reservoir Formation Process, Ministry of Education, China University of Mining and Technology, Xuzhou
来源：
Diqiu Kexue - Zhongguo Dizhi Daxue Xuebao/Earth Science - Journal of China University of Geosciences | 2022年 / 47卷 / 05期
关键词：
Evaluation grade; Fine evaluation method; General evaluation method; Geological index system; Petroleum geology; Underground coal gasification;
D O I：
10.3799/dqkx.2021.112
中图分类号：
学科分类号：
摘要：
In order to clarify the geological factors affecting underground coal gasification (UCG) and construct a scientific and quantitative geological index evaluation system, seven types of geological conditions and 41 geological indexes affecting UCG are systematically analyzed, graded and quantified, and then the geological selection index system is established in the paper. According to the importance of the selected area, each geological index is divided into two categories: basic geological index (A) and key geological index (B). Based on these two categories of indexes, two new quantitative evaluation methods for favorable areas of UCG are proposed, namely fine type (A+B) and general type (B). The weight of geological indexes involved in the two evaluation methods is determined using expert scoring method and analytic hierarchy process (AHP). According to the conditions of resources, mining technology, regional structure and environment, the qualitative classification scheme of evaluation results is determined, and the general steps of favorable area optimization are put forward by comprehensive quantitative evaluation and qualitative classification. Finally, a complete set of evaluation technical system for favorable areas of UCG is formed. The effective application of the evaluation technology system can provide important theoretical support for the scientific site selection and industrialization process of UCG. © 2022, Editorial Department of Earth Science. All right reserved.
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页码：1777 / 1790
页数：13
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