MENU
Aquifers always pose a potential complication in gas extraction because recharge of the coal seam must be prevented or it will limit production. Aquifers may also lead to problems because of the emotive political nature of any discussions relating to gas production in proximity to them. Variable Permeability (spatially)
view more
Microwave irradiation (MI) technology is a potential effective method to improve the efficiency of coal seam gas recovery. However, the research on how to increase coal …
view more
ABSTRACT. Coal reservoirs especially deep unminable coal reservoirs, are viable geological target formations for CO 2 storage to mitigate greenhouse gas emissions. An advantage of this process is that a large amount of CO 2 can be stored at relatively low pressure, thereby reducing the cost of pumping and injection. Other advantages include the use of existing well …
view more
The #2 coal seam of the Shanxi Group and the #15 coal seam of the Taiyuan Group in this mining area are recoverable coal seams. The good field is generally an anticline structure with a gentle dip angle between 4° and 14°. The thickness of #15 coal is 0.75 m~3.80 m, with an average of 2.45 m. It is a medium-thick coal seam.
view more
1. Introduction. Coal seam gas (CSG), sometimes refers to coalbed methane (CBM), is a clean energy resource which is generated during the coalification process [1,2].Most of the CSG is stored in the coal seams in an adsorption phase state [3,4].To improve the gas recovery, other gases are injected into the coal seam to promote the recovery rate and ratio.
view more
An Australian coal mine improved dig rates by more than 11% using the stratification module and Measure While Drilling (MWD) data. The strategy for a large mining conglomerate included the company-wide …
view more
Coal seam gas content ranges from a few ft3/t to 800 ft3/t for depths of up to 3000 ft. Coal seams are the origin of all gases, and also the reservoir. Methane accounts for 80%-95% of the full gas content, while the …
view more
Download scientific diagram | CBM recovery of coal seam in Step 1. from publication: Numerical analysis of drainage rate for multilayer drainage coalbed methane well group in Southern Qinshui ...
view more
AbstractSection Abstract . Coupled coal–gas interaction in coal seams is crucial to the efficient recovery of Coalbed methane (CBM), and carbon dioxide-enhanced CBM (CO 2-ECBM).Coal is physically deformed and damaged during gas extraction/injection and permeability enhancement in coal seams, which might alter the reservoir properties of coalbeds in terms of …
view more
U.S. Department of Energy Office of Scientific and Technical Information. Search terms: Advanced search options. ...
view more
Coalbed methane (CBM) is a potential green energy supply for addressing the worldwide energy crisis. However, the recovery of economically viable amounts of methane requires the application of production-enhancement techniques. The greater effectiveness of enhanced coalbed methane (ECBM) recovery compared to traditional pressure depletion and hydraulic stimulation …
view more
Three crucial studies experimented with chemicals and pH, and found possible ways to improve recovery, meet some sustainability goals, and cut costs. Three critical coal …
view more
The strength of sandy mudstone and mudstone was low, while the strength of coal seam was relatively high. The strength-to-stress ratios of rock and coal seam were both greater than 3, suggesting that the geomechanical condition was favorable for the ground control of the roadway. 3. Double-use entry control system 3.1. Combined support
view more
The seam gas composition varies between predominantly CH4 to predominantly CO2, with up to CO2 in some areas. The magmatic origin of the CO2 in these coals is …
view more
program and the Bureau Coal Recoverability program is the Bureau's use of total coal seam thickness in to 65% recovery of the ROM coal seam was Alberta Energy: What is coal? The …
view more
23 July 2020. Cardiff University engineers are leading a pan-European project to explore the feasibility of enhancing carbon dioxide (CO2) storage in European coal seams. Technology will be used to create a horizontal 'well system' at specialist research facilities in Mikolów, Poland, enabling engineers to monitor the rate of uptake of CO2 ...
view more
Microwave heating is a promising non-aqueous technology in coal seam enhancement. Recently, it has been considered as an alternative technology to hydraulic fracturing and …
view more
U.S. Department of Energy Office of Scientific and Technical Information. Search terms: Advanced search options. ...
view more
With respect to the heating method in gas reservoir, Salmachi and Haghighi [18] confirmed that heat injection can increase the gas recovery in coal seam by more than 58% within 12 years, and the ...
view more
Natural clinoptilolite type zeolite was examined for its potential to treat coal seam gas (CSG) water and remove sodium ions to lower sodium adsorption ratio and reduce pH. The effectiveness of unmodified and modified natural zeolite is due to their regular composition and open porous structure, high exchange capacity, mechanical strength and stability, and …
view more
Sigra's Role. Despite the current dominance of major players in the development of gas reserves in coal, there is still room for the smaller operator. The technology base is not held within these groups, and if the local …
view more
Coal seam gas (CSG) is on track to become a major new export for Australia. The production of CSG releases a significant amount of brackish water to the surface. Yearly volumes may range between ...
view more
Much of the recent research on coal use in the United States has focused on the capture of pollutants such as acid gases, particulates, mercury, and carbon dioxide. The possible recovery of rare earth and other critical …
view more
Some of the most promising potential applications of nanotechnology to hydraulic fracturing of coal seam gas (CSG) are reviewed with a focus on Australian CSG wells. Three propitious applications were identified: (1) Nanoparticle enhanced viscoelastic surfactants (VES) fracturing fluids to prevent fluid loss by up to 30%, made possible by the formation of pseudo …
view more
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
view more
Among these, inspired by the "gas displacement" technology of the petroleum system, carried out at the end of the 20th century, the experiment of injecting CO 2 into the coal seam to improve the CBM recovery (CO 2-ECBM) in the San Juan basin, United States, was successful, which explored a new technical way for the rapid gas drainage of low ...
view more
As seen in Fig. 1, if the drawing process behind the face is continued in the top coal drawing process, the entire top coal can be produced.However, the increasing RMR causes the coal to be diluted significantly. Since the dilution in the coal will increase the cost of the processes to separate the waste rock from the coal, the TCRR is generally kept around 85% …
view more
Copyright © 2023 Shibang Industry & Technology Group Co., Ltd.
المنتجات
محلول
حول الولايات المتحدة
اتصل بنا