Abstract
A continuous growth in the global economy and population requires a sustainable energy supply. Maximizing recovery factor out of the naturally occurring hydrocarbons resources has been an active area of continuous development to meet the globally increasing demand for energy. Coalbed methane (CBM), which is one of the primary resources of natural gas, associates complex storage mechanisms and requires some advanced recovery techniques, rendering conventional reserve assessment methods insufficient. This work presents a literature review on CBM in different aspects. This includes rock characteristics such as porosity, permeability, adsorption capacity, adsorption isotherm, and coal classification. In addition, CBM reservoirs are compared to conventional reservoirs in terms of reservoir quality, reservoir properties, accumulation, and water/gas saturation and production. Different topics that contribute to the production of CBM reservoirs are also discussed. This includes production mechanisms, well spacing, well completion, and petrophysical interpretations. The main part of this work sheds a light on the available techniques to determine initial-gas-in-place in CBM reservoirs such as volumetric, decline curve, and material balance. It also presents the pros and cons of each technique. Lastly, common development and economic challenges in CBM fields are listed in addition to environmental concerns.
Highlights
Continuous growth in the global economy and population requires a sustainable energy supply
Extraction of gas generated and stored inside coalbeds, known as coalbed methane (CBM), is one of the tools to meet global energy demand. This is mainly due to the large number of deposits of CBM scattered around the globe
It is worth mentioning that CBM is considered a clean-burning fuel since it minimizes greenhouse emissions and lowers air pollution [4]
Summary
Continuous growth in the global economy and population requires a sustainable energy supply. Data Item crude oil natural gas coal traditonal biofuels others. Petroleum engineers are always in a race towards maximizing recovery factor out of conventional and unconventional reservoirs (tight gas and oil, coalbed methane, shale gas and oil, heavy oil, and gas hydrate formations) in order to meet such demand. Extraction of gas generated and stored inside coalbeds, known as coalbed methane (CBM), is one of the tools to meet global energy demand. This is mainly due to the large number of deposits of CBM scattered around the globe. It is worth mentioning that CBM is considered a clean-burning fuel since it minimizes greenhouse emissions and lowers air pollution [4]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
