doi:10.16186/j.cnki.1673-9787.2020.6.7

Received:2020/02/17

Revised:2020/04/12

Published:2020/11/15

Prediction of higher-permeability region of coalbed methane based ontectonic curvature of coal-seam floor

HUANG Bo1,2, ZHENG Qiming1,2, QIN Yong2, SHI Songlin1

1.College of Resources and Environment， Henan University of Engineering， Zhengzhou  451191 ， Henan， China;2.Key Laboratory of Calbed Methane Resources and Reservoir Formation Process， Ministry of Education， China University of Mining and Technology ，Xuzhou  221008 ， Jiangsu， China

Abstract:To predict the permeability of No.8 coal seam in Gujiao block， the principle of calculation of coal seam fracture permeability by maximum tectonic curvature was elobrated. The maximum tectonic curvature of coal-seam floor was calculated by the difference method， and a numerical model for predicting coal-seam permeability was established by analyzing the relationship among the maximum tectonic curvature， coal seam thickness and fracture spacing. The prediction results showed that the coal seam permeability in the Gujiao block was between 0. 002~0. 650 mD， with the highest in the north and the lowest in the East. The permeability of the coal seam predicted by this model was significantly higher than that of the pore permeability tested by the experiment， which was consistent with the result of well test and fracture permeability. It showed that it was feasible to use this model to predict the coal seam fracture permeability.

Key words:coal seam fracture permeability;floor maximum tectonic curvature;Gujiao block

基于底板构造曲率的煤层高渗区预测_黄波.pdf