Title: Prediction of methane content of deep coal seams in the Sunan mining area in Anhui Province, China

Authors: Zhigen Zhao; Fengtang Sui; Jiaping Yan

Addresses: School of Earth and Environment, Anhui University of Science and Technology, Huainan 232001, China ' Exploration and Research Institute, Anhui Provincial Bureau of Coal Geology, Hefei 230088, China ' School of Surveying and Mapping, Anhui University of Science and Technology, Huainan 232001, China

Abstract: The prediction of the methane content in deep coal seams in the Sunan mining area is an important goal and an exploratory investigation. In this study, the pressure-adsorption curve method is used to predict the theoretical adsorption quantity of methane and the free quantity of methane at different burial depths using the No. 82 coal seam in the Qidong coal mine in the Sunan mining area as an example. The methane contents at different burial depths of the coal seam are predicted based on the gas saturation and the theoretical methane content. The proposed prediction method not only solves the problem of predicting the methane content of deep coal seams in the Sunan mining area but also provides a valuable reference for the methane content prediction of deep coal seams in other mining areas. [Received: February 16, 2018; Accepted: May 2, 2018]

Keywords: Sunan mining area; deep coal seam; methane content; prediction; burial depth; reservoir pressure; reservoir temperature; coal quality; theoretical adsorption quantity; pore volume coefficient; methane pressure; free quantity of methane; gas saturation; China.

DOI: 10.1504/IJOGCT.2020.105778

International Journal of Oil, Gas and Coal Technology, 2020 Vol.23 No.3, pp.351 - 364

Received: 16 Feb 2018
Accepted: 02 May 2018
Published online: 13 Mar 2020 *

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