Which companies in Shanxi are developing coalbed methane?

Jincheng Anthracite Mining Group Blue Flame Coalbed Methane Company PetroChina Huabei Oilfield Shanxi Coalbed Methane Exploration and Development Branch Zhonglian Coalbed Methane Company PetroChina Company Sinopec East China Petroleum Company Asia-America Continental Coalbed Methane Company Orian Company These are several well-known rankings. The output of the top several state-owned enterprises ranks blue flame, and now it is the largest and most technologically advanced. However, due to the limitation of the coal enterprise system, I am not optimistic about the development of Blue Flame. The best prospects should be the coalbed methane of PetroChina and the coalbed methane of Huabei Oilfield, which has the most mineral rights blocks.