WEBA fully coupled multidomain and multiphysics model considering stimulation patterns and thermal effects for evaluation of coalbed methane (CBM) extraction Wai Li, Jishan Liu, Jie Zeng, Yee Kwong Leong, Derek Elsworth, Jianwei Tian
WEBJun 9, 2022 · Injection of CO 2 and subsequent desorption of CH 4 is considered to be the most efficient enhanced coalbed methane (ECBM) recovery technique to date. Meanwhile, CO 2 ECBM is an excellent option for CO 2 geosequestration for an extended period. Despite ongoing research efforts and several field appliions of this technology, the .
WEBDec 28, 2023 · During a CBM extraction process, methane gas in a coal matrix subsystem diffuses continuously into fractures driven by the FGDG, while the outermost layer of the matrix subsystem is the methane mass transfer boundary between the two. ... Flow of coalbed methane to a gallery. Transport in Porous Media, 41, 1–16. Article .
WEBDec 1, 2019 · These results provided important references for the study of coalbed methane extraction. However, these papers simplified the extraction process of CBM as a singlephase gas flow process. In other words, these papers neglected the effect of twophase flow process on coalbed methane extraction.
WEBFeb 1, 2000 · Review of technologies available to capture and use methane released from active and closed coal mines. Major coal basins of Asia (Kelafant and others, 1992) Types of well completion methods ...
WEBMay 1, 2021 · Coalbed methane resource development can not only reduce the natural emission of a greenhouse gas and ensure full energy utilization, but it can also allow safer coal mining and reduce the risk of underground disasters like gas and coal outbursts and fires from spontaneous combustion (Wang et al., 2012; Zou et al., 2020).
WEBAug 14, 2023 · CBM refers to methane that is found in and extracted from coal seams. It is formed during the coalifiion process, which is the transformation of organic plant material into coal. CBM is also known as coal seam methane or coal seam gas, and is widely considered an "unconventional" source of natural gas.
WEBNov 20, 2020 · Gas is stored in micropores on the coal surface in coalbed methane (CBM) reservoirs, mainly via adsorption 1, order to release CBM from the coal and produce gas through the cleat system, the ...
WEBSep 10, 2018 · The lowtemperature oxidation of coal during coalbed methane extraction is inevitable. To study the evolution of the CH 4 adsorption and desorption characteristics in coal masses during the lowtemperature oxidation of coal, starting from the evolution of physical and chemical adsorption of CH 4 in coal masses during the lowtemperature .
WEBNov 1, 2022 · Besides, they studied the variation laws of coal seam permeability, gas pressure and flow rate during heat injection. The following conclusion was drawn: the increase of coal seam temperature after heat injection can promote coalbed methane (CBM) desorption and improve coalbed permeability to realize the goal of increasing .
WEBNov 1, 2012 · Coalbed methane (CBM) forms as either biogenically or thermogenicallyderived gas. The former occurs in 'under mature' (< % vitrinite reflectance) coals and is the result of bacterial conversion of coal into CO 2 or acetate, which is then transformed by archaea into CH 4. Thermogenic gas is formed as part of the coalifiion process ...
WEBNov 1, 2012 · Abstract. The commercial extraction of methane from coal beds is now well established in a number of countries throughout the world, including the USA, Australia, China, India and Canada. Because coal is almost pure carbon, its reservoir character is fundamentally different to conventional gas plays. Coalbed methane (CBM) forms as .
WEBAug 7, 2023 · Coal bed methane, also known as coal seam gas or coalbed gas, is a form of natural gas recovered from coal beds. It is considered a clean energy source, contributing to its popularity. Countries like the USA, Australia, and Canada have seen significant development of CBM as an energy source. CBM consists of methane .
WEBJan 1, 2023 · 1. Introduction. s we all know, coalbed methane (CBM) serves as a "doubleedged sword" during coal mining. On the one hand, it may cause disasters such as coal and gas outbursts or gas explosions, seriously threatening the safety of coal mine (Ranjith et al., 2017).On the other hand, as a clean energy (Chécko et al., 2020, Singh and .
WEBApr 20, 2022 · This paper proposes an improved coupled modeling method for coalbed methane extraction after hydraulic fracturing. Based on the damage mechanics theory, we introduce a state damage variable to record the damage changes at different times and construct the coupling governing equations of the seepage field and solid mechanics .
WEBSep 22, 2022 · Coalbed methane (CBM) drilling and completion technologies (DCTs) are significant basis for achieving efficient CBM exploration and exploitation. Characteristics of CBM reservoirs vary in different regions around the world, thereby, it is crucial to develop, select and apply the optimum DCTs for each different CBM reservoir. This paper firstly .
WEBJul 27, 2023 · Faced with the intrie selection of coalbed methane extraction equipment, the adaptability evaluation of coalbed methane extraction is regarded as a multilevel fuzzy decisionmaking problem. ... Wang, H., et al.: Developing efficiency and the working system of wells during the dewatering gas production process in coalbed methane .
WEBPermeability rebound and recovery are pivotal in determining the efficacy of coalbed methane (CBM) extraction and the impact of superheated water injection during thermally enhanced CBM extraction. Existing research predominantly focuses on the roles of effective stress and methane desorption shrinkage, often neglecting the critical .
WEBOct 1, 2015 · The capture of calorific valuable methane gas prior to the mining process is called coalbed methane (CBM), which would result in efficient energy recovery. Methane gas can entrap 20 times of heat energy as compared to CO 2 [1]. Therefore, the emission of methane into the atmosphere is one of the causes of global warming.
WEBDec 1, 2019 · In other words, these papers neglected the effect of twophase flow process on coalbed methane extraction. The water that was present could occupy the space of gas, which could lead to a decrease in the relative permeability of gas (Morad, 2012). Clarkson et al. (2011) also believed that the relative permeability of water was positively ...
WEBJul 1, 2016 · Although the interaction of gas and coal has been comprehensively investigated in coalbed methane (CBM) extraction process, fewer scholars have taken the effect of temperature and groundwater into account, which brought a large deviation for CBM extraction design. In this study, a fully coupled thermal–hydraulic–mechanical .
WEBAug 15, 2023 · Coal bed methane (CBM) is a natural gas that is extracted from coal beds. The process of extracting CBM involves a series of steps that can present various challenges and problems as exhibited in the Fig. 4. Some of the most common challenges and problems associated with coal bed methane production are discussed below.
WEBApr 1, 2012 · The commercial exploitation of coalbed methane (CBM) has been achieved in the Qinshui Basin, China. However, the productivity of wells varies greatly because of their different geological settings and production rules, and the permeability damage to coal reservoirs caused during the development process is one of the most important factors .
WEBApr 17, 2019 · 1 INTRODUCTION. China is one of the countries with the largest coalbed methane resources. The exploration and development of CBM resources are of great significance for ensuring the safe production of the coal mine, improving the energy structure and purifying the environment in China. 13 CBM is a kind of unconventional .
WEBOct 1, 2017 · The technique of thermal stimulation for coalbed methane extraction is considered an important approach for increasing coalbed methane production capacity in the future. ... Acidic stimulation is a process of demineralisation in the coal reservoir using hydrochloric, acetic, or formic acids, resulting in opening and interconnecting pores and ...
WEBJun 1, 2017 · In this study, a gas–solid coupling model is used to conduct a numerical solution for coalbed methane migration in the process of underground methane extraction. The effects of the diffusion and suction negative pressure on the methane migration and extraction are studied. Key findings are summarized as follows: (1)
WEBJul 1, 2019 · Coalbed methane (CBM) drainage in underground coal mining is of significance to guarantee mining process safety and bring valuable environmental benefits, as the drainage could help to eliminate methanerelated accidents, reduce greenhouse gas (GHG) emissions and provide a source of clean energy. Due to the .
WEBJan 26, 2024 · Coalbed methane production began in the 1980s; shale gas extraction is even more recent. The main enabling technologies, hydraulic fracturing and horizontal drilling, have opened up new areas for oil and gas development, with particular focus on natural gas reservoirs such as shale, coalbed and tight sands. Shale Gas Extraction
WEBNov 1, 2023 · 1. Introduction. Deep coalbed methane (CBM) resources are abundant globally, with >50% of the inplace CBM resources found in coals at depths below 1524 m (5,000 ft), as indied by the review of major coalbearing basins worldwide (Kuuskraa and Wyman, 1993).For instance, over 70% of the gas inplace in the Piceance Basin of the .
WEBMay 30, 2018 · In multibranch horizontal well CMB extraction process, the matrix shrinkage caused by temperature reduction and methane desorption dominates, the permeability continues to increase. Due to the effect of temperature on the amount of gas adsorbed by coal, the CH 4 production decreases with the increase of initial reservoir .
WEBSep 18, 2017 · Park, S. Y. Liang, Y. Biogenic methane production from coal: a review on recent research and development on microbially enhanced coalbed methane (MECBM). Fuel 166, 258–267 (2016).
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