The current average daily gas production of single coalbed methane (CBM) wells in China is less than 1,300 m3. low rate CBM dramatically limits the sustainable development industry China. To promote development, three universal geological factors, i.e., sources, channels, and driving force are analyzed, considering various complicated conditions reservoirs Additionally, we find that growth prov...

The South Yanchuan block is the deepest developed high-rank coalbed methane (CBM) field in China, geological conditions this are complex and main controlling factors of CBM content various. Thus, a decision-making model potential deep resource based on geographical information system (GIS) weighted linear combination (WLC) established, influence analyzed, favorable areas divided. Results show t...

Although hydraulic fracturing technology has been comprehensively investigated, few scholars have studied the influence of on effect coalbed methane (CBM) extraction, and considered interaction between water CBM in research process, which is not conducive to guiding engineering design wells. In this work, a hydraulic-mechanical-thermal coupled model for extraction well established; it combines ...

As a tool for exploration of concealed coal seams by modern techniques, determination of the depth of erosion of coal seams with reference to the surface of angular unconformity underlying the remnants of a key bed is conducted for the first time in coal mines of Kerman region. The angular unconformity surface (the initial surface exposure of coal seams) separates the coal seams of Jurassic age...

sampling and desorption testing of fresh coal samples obtained from companies conducting exploration throughout the province. In addition methane adsorption isotherm tests arc: performed on some samples. During the summer of 1992 a project was undertaken to test coal seams intersected in the ongoing Manalta Coal Limited drilling program in the Telkwa coalfield. On-sitc activities consisted of t...

in the present study, an investigation was carried out on parvadeh coal mine in tabas, iran, to survey the effect of fractures on unusual methane gas emission in coal mines. this coal mine was chosen for investigating because of its high methane gas content in the coal body and available data from sensors in desired locations. gas concentration monitoring programs were carried out at the mine s...

In the present study, an investigation was carried out on Parvadeh coal mine in Tabas, Iran, to survey the effect of fractures on unusual methane gas emission in coal mines. This coal mine was chosen for investigating because of its high methane gas content in the coal body and available data from sensors in desired locations. Gas concentration monitoring programs were carried out at the mine s...

Enhanced coal bed methane recovery using gas injection can provide increased extraction depending on the characteristics of and that is used. Accurate prediction extent adsorption by are therefore important. Both experimental methods modeling have been used to assess its effects, including volumetric gravimetric techniques, as well Ono–Kondo model other numerical simulations. Thermodynamic para...