As an environmentally friendly and high-calorific natural gas, coalbed methane (CBM) has become one of the world’s most crucial unconventional energy sources. Undoubtedly, it is necessary to conduct in-depth research on reservoir exploration methods ensure high stable CBM production in development stage. However, current have disadvantages such as cost, complex devices, poor terrain adaptabilit...

Numerical well testing is used mostly in oil/gas, geothermal, and coalbed methane injection/falloff well-testing interpretations while few published studies have been presented on how to adjust the models numerical experiments parameters. Meanwhile, there no simple highly applicable evaluation standard approximation degree between simulated field-measured pressure response. In this paper, seven...

As part of our efforts to model enhanced coalbed methane recovery and CO2 sequestration in coalbeds, we have investigated the pure adsorption isotherm behavior of five dry coals namely, Illinois #6, Wyodak sub-bituminous, Pocahontas, Beulah Zap, and Upper Freeport coal. Using a volumetric technique, isotherms of pure methane, nitrogen, CO2 and ethane were measured at a temperature of 328.15 K (...

Coal mining is responsible for 11% of total anthropogenic methane emission thereby contributing considerably to climate change. Attempts to harvest coalbed methane for energy production are challenged by relatively low methane concentrations. In this study, we investigated whether nutrient and acetate amendment of a non-producing sub-bituminous coal well could transform the system to a methane ...

A large number of models have been established to describe permeability variation with the depletion of reservoir pressure to date. However, no attempt has been made to draw enough attention to the difference in the effect of various factors on permeability variation in different production stages of unsaturated CoalBed Methane (CBM) reservoirs. This paper summarizes the existing and common per...

This paper presents the possibilities of adapting active mines to generate green energy after their closure using resources and/or infrastructure. For this purpose, firstly, temporal horizon selected in Poland was determined, its basic assumption being analysis current state. In research, 18 mining plants operating within 12 Upper Silesian Coal Basin (USCB) were analyzed. The analyzed belong th...

In longwall mining, premining prediction of methane emission rate depends on a number of geological factors, geographical factors, and operational factors. These same factors also can impact the selection of a specific degasification system. This study proposes a principle component analysis (PCA) and artificial neural network (ANN) approach to predict the ventilation methane emission rates of ...

Microbially enhanced coalbed methane (MECBM) has important theoretical and practical significance for reforming coal reservoir structure, alleviating greenhouse effects energy crises developing new sources of clean energy. In this study, No. 3 seams in Qinshui Basin were taken as research objects to analyze the pore structure characteristics after microbial treatment by means low-temperature ni...