Title: Rock physical and mechanical properties test and comprehensive evaluation of the Longtan group in Well DH Can 1, Dahebian block, Guizhou Province

Authors: Yu Liang; Liwen Cao; Shuxun Sang

Addresses: School of Resources and Geosciences, China University of Mining and Technology, Xuzhou, Jiangsu, 221116, China ' School of Resources and Geosciences, China University of Mining and Technology, Xuzhou, Jiangsu, 221116, China ' Carbon Neutrality Institute, China University of Mining and Technology, Xuzhou, Jiangsu, 221008, China; School of Resources and Geosciences, China University of Mining and Technology, Xuzhou, Jiangsu, 221116, China

Abstract: Coal measures are characterised by soft and hard interphases and fractures development. Testing and evaluating the rock physical and mechanical properties of coal measures provides the basis and premise for efficient exploration and development of coalbed methane. In this study, sampling, logging, and laboratory tests were conducted in the Longtan group of Well DH Can 1, which is located in the Dahebian block of Guizhou Province. Additionally, the coal measure rock mass underwent the fuzzy comprehensive evaluation. Results show that the mechanical properties of the coal measure are remarkable and the relevance between the four rock property parameters and two logging parameters is good. The comprehensive evaluation results of the Longtan formation rock mass in Well DH Can 1 show grades 2-4; furthermore, the fuzzy comprehensive evaluation method is more comprehensive and reasonable than the basic quality (BQ) method for rock mass parameter selection and index weighting. [Received: July 22, 2022; Accepted: February 9, 2023]

Keywords: coal measure; rock physical and mechanical properties; logging; fuzzy comprehensive evaluation method.

DOI: 10.1504/IJOGCT.2023.131638

International Journal of Oil, Gas and Coal Technology, 2023 Vol.33 No.3, pp.282 - 302

Received: 21 Jul 2022
Accepted: 09 Feb 2023
Published online: 21 Jun 2023 *

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