Author: LYU Baoyan, YANG Hongmin,CHEN Liwei, FAN Shangchong | Time: 2021-03-10 | Counts: |
doi:10.16186/j.cnki.1673-9787.2019060046
Received:2019/06/18
Revised:2019/07/26
Published:2021/03/15
Study on the difference of gas adsorption amount of coal reservoirs in differentareas based on principal component analysis
LYU Baoyan1, YANG Hongmin1,2, CHEN Liwei1,2, FAN Shangchong1
1.School of Safety Science and Engineering, Henan Polytechnic University, Jiaozuo 454000 , Henan, China;2.Engineering Research Center of the Ministry of Education for Coal Mine Disaster Prevention and Rescue and Disaster Relief, Jiaozuo 454000 , Henan, China
Abstract:In order to accurately and effectively predict the gas adsorption amount of coal reservoirs, the main components of the coalbed methane block in Qinshui basin and the eastern margin of the Ordos basin in China were studied. The principal component analysis method was used to determine the main components of the factors affecting the gas adsorption amount of coal reservoirs. Then, by using the principal components, a model of gas adsorption amount of coal reservoir was established. The principal component analysis was preferred by comparison of various dimensionality reduction methods. The results showed that four principal components were extracted from the eight indicators affecting the gas adsorption amount of coal reservoirs, and the information interpretation of the four principal components to the original indicator system reached 86. 804% ; There were significant differences in gas adsorption amount of coal reservoirs in different blocks, among them temperature, pressure, moisture and coal rock micro-components played a decisive role; The predicted values of gas adsorption amount of coal reservoirs in different blocks were not much different from the actual measurements. The engineering requirements could be basically met, and the unknown risks of underground mining were extremely effectively reduced, which provided theoretical basis and guidance for the research and development of coalbed methane in China.
Key words:Qinshui basin;eastern margin of Ordos basin;coal reservoir;principal component analysis;gas adsorption amount