الدعم من قبل:

improve potential use of coal seam recovery

  • منزل
  • improve potential use of coal seam recovery
Images

Gas storage potential and electrohydraulic discharge (EHD ...

This paper evaluates the potential methane storage capacity of six clay-rich interburden rock samples from coal seam gas (CSG) wells in the Surat Basin, Australia. Clay minerals identified in all samples included kaolinite, illite, smectite, and illite-smectite mixed-layers.

Research on the Processes of Injecting CO2 into Coal Seams ...

Currently, CO 2 sequestration in deep unmineable coal seams with parallel methane recovery is considered as one of the potential methods of carbon dioxide utilization [1,2].In the enhanced coal bed methane (ECBM) technology, the injected CO 2 displaces methane on account of the preferential adsorption of CO 2 in coal. In general terms, the technology consists in the desorption, diffusion and ...

Underground coal gasification (UCG) – Potential to ...

Underground coal gasification (UCG) – Potential to increase coal reserve worldwide in environment-friendly manner:. 1. Introduction: Worldwide, coal reserves are quite vast – over 10 trillion tonnes. However, unless cleaner and cheaper ways can be found to convert coal to gas or liquid fuels, coal is unlikely to become an acceptable replacement for dwindling and uncertain supplies of oil ...

Cyclic N2 injection for enhanced coal seam gas recovery: …

This study demonstrated that cyclic N 2 injection method has several potential advantages for different field applications. This injection method can improve coal seam gas recovery with much reduced N 2 consumption, and in particular, reduce the cost for separating gas mixture product in nitrogen enhanced coalbed methane recovery (N 2-ECBM ...

Direct Injection of Flue Gas into Coal Seams for Carbon ...

gas within the coal. Both factors significantly improve the commerciality of coal bed methane developments. DTI estimates of CBM potential in the UK have been put at 30 billion m3 (Ref. 6). These are extremely conservative and do not correspond with the British Coal estimates of remaining UK coal in place of some 190 billion tonnes (Ref. 5).

Murali Nagarajan and Chris Batten, Orica, Australia ...

ach year, inefficient coal recovery in challenging geologies at coal mining operations around the world results in significant financial impacts for operations. Maximising coal recovery and extracting marginal coal seams represent a significant opportunity for coal mines to increase the value of their resource and productivity of operations.

Underground Coal Gasification | netl.doe.gov

The potential for using the cavity in the coal seam created by UCG for CO 2 storage has been suggested. Using the coal seam cavity has the advantages of pre-existing boreholes and large volumes, but there are potential hurdles as well: the integrity of the cavity can be compromised by cracking and collapsing caused by the UCG process.

CO2 Sequestration in Deep "Unmineable" Coal Seams

Linear Process • Generation of power by burning surface mined coal. • Injection of flue gases from coal-burning into deep unmineable coal beds where the gases are adsorbed to the coal. • Displacement of the adsorbed methane off the coal by the flue gasses and recovery of the methane at the surface. • This produced Coalbed Methane (CBM) is used as feedstock for

Evaluation of a coal seam roof water inrush: case study in ...

The coal-bearing strata form a monocline structure striking northwest (dip angle 3° to 10°) with excellent coal seam conditions and enormous reserves. The reserves of the main coal seams (#2, #3, and #10) are estimated at 1.495 billion tons. Coal seams #2 and #10 are thick, stable, and of …

0704 COAL SEAM GAS RECOVERY IN AUSTRALIA AND …

enhanced coal seam gas recovery (CO 2-ECBM) operations in Australian coal seams. The investigation focuses on the coal seam gas reservoir properties, measured by CSIRO over the last two decades, to devise a model for the CO 2 storage potential of coal seams as a function of coal seam depth. Results from CO 2 natural

Minimising coal loss through use ... - Orica Mining …

increasing ash content of the coal seam significantly or preventing sections of the coal from being recovered. Further to the damage that can be caused by explosives either destroying or contaminating the coal seam, the increase in use of cast or throw blasting in large scale open pit operations, provides the potential for losses of coal.

CONSULTING: Enhanced Recovery - Advanced Resources ...

Our firm has expertise in the technologies, markets, environmental and regulatory issues, and economics of CO 2 enhanced oil recovery (CO 2-EOR) in depleted oil as well as shale oil reservoirs.Also, ARI is a leading researcher in the use of N 2 and CO 2 to improve natural gas recovery from coal seam and shale gas systems.

Liquid CO2 injection to enhance coalbed methane recovery ...

In recent times, enhanced deep-buried coalbed methane recovery has increased the interest in coal and unconventional natural gas exploration. This study investigated liquid CO 2 (LCO 2) injection to enhance coalbed methane recovery, the variation in the gas component and the sweep efficiency of CH 4 recovery by LCO 2 injection into coal were studied under laboratory conditions.

Experimental and numerical evaluation of CBM potential in ...

Geophysico-mechanical characterization of coal data are important in the economic success of CH 4 extraction as well as a CO 2 injection in deep coal seam reservoir. The heterogeneous nature of coal makes the CH 4 removal quite challenging because of the complex behaviour of the seam at in situ as well as applied stress level. Coal matrix behaviour depends on several parameters as …

Recovery of a target reflection underneath coal seams ...

It has successfully recovered the reflection 'A-A' of the potential gas reservoir (about 1.52–1.56 s), which is immediately underneath a group of strong coal-seam reflections. Note that in the plot of figures 1–3, a time-squared gain recovery has been applied in order to boost the weak amplitudes for an easy visual comparison to the ...

Potential for deep geothermal energy in Scotland: study ...

The Limestone Coal Formation contains little limestone, but does contain some of Scotland's most significant coal seams ( Table 6). The geological structure of the Midland Valley is complex, and discrete coal seams cannot necessarily be traced across large areas. Different numbers and thicknesses of seams were mined in different areas ( Table 6).

Automated Coal Seam Identification Improves Drilling and ...

Dig Rates Improve in Australia. 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 increase of coal production by 3 million metric tons (mt) this year through improved coal recovery.

Coal Mine Methane: A Review of Capture and Utilization ...

Coal mine methane (CMM) is a term given to the methane gas produced or emitted in association with coal mining activities either from the coal seam itself or from other gassy formations underground. The amount of CMM generated at a specific operation depends on the productivity of the coal mine, the gassiness of the coal

Identification of coal seams suitability for carbon ...

12%Coal seams also have good potential for CO 2 storage while enhancing coal seam gas recovery. Coalbed methane (CBM) resource in Indonesia is identified of 453.3 TCF, and the biggest CBM resources are located in South Sumatera Basin which is about 183 TCF or 40.37% of total Indonesia's CBM resource (Stevens and Hadiyanto 2004 ).

Micro-scale response of coal with respect to CO2 ...

Anthropogenic energy-related carbon dioxide (CO2) emissions are higher than ever and continue to increase. Injection of CO2 into deep coal seams has great potential to sequester CO2, while simultaneously enhancing coalbed methane recovery (CO2-ECBM). Although ongoing pilot projects worldwide show early favourable results, many operational problems occur during CO2 …

Pre-feasibility Study on Coal Mine Methane Recovery and ...

to produce power for mine use or export to the public gridsite heat generation ; and (2) on-from existing mine boilers which presently consume coal, but can be switched to use CMM. To assess the value in continuing on to a full-scale feasibility study, the Project Team

Technology to Improve coal recovery - Orica Mining Services

Technology to Improve coal recovery * Technology to Improve Coal Recovery. Dust is a natural consequence of all mining operations. That doesn't mean you can't minimise the amount of dust following a blast`- and generate operational efficiencies while you're at it.

A numerical study of the mining‐induced energy ...

In recent years, an increasing number of deep coal mines in China have employed a single-entry system, with a small pillar (4-9 m wide) left between the extracted coal panel and the adjacent coal seam, to improve the coal resource recovery rates or eliminate the coal burst risk. 1-3 Some studies have shown that a longwall retreat adjacent to an ...

Carbon dioxide (CO 2 ) sequestration in unmineable coal ...

The chapter first introduces the concept of CO 2 storage in coal seams (Section 5.2) and then presents the main mechanisms acting during the ECBM recovery process (Section 5.3). The issues to be addressed, both at laboratory and field test scales, to assess the potential of a coal seam for ECBM are treated in more detail in the next sections.

(PDF) Environmental issues associated with coal seam gas ...

Coal seam gas reserves represent a major contribution to energy needs, however, gas recovery by hydraulic fracturing (fracking or fraccing), requires management to minimise any environmental effects.

Potential for enhanced coalbed methane recovery CCC/252 - ICSC

Potential for enhanced coalbed methane recovery CCC/252. The recovery rate of methane is usually limited by the coal seam gas pressure and diffusion rate and, as a result, not all the available gas can be recovered. By injecting gas into the seam, further methane can be liberated. This gas can be CO2, N2, flue gas or a combination thereof.

Carbon Dioxide Storage in Coal Seams with Enhanced Coalbed ...

Results from the injection test and subsequently returning the well to production, confirm that fractured coal seams have the potential to sequester carbon dioxide and increase methane production. It was demonstrated through the use of perfluorocarbon tracers that there is a connection through the coal matrix between the injection well and ...

Experimental study of physical‐chemical properties ...

An initial investigation into the impacts of CO 2 storage in unmineable coal seams, with or without enhanced coal‐bed methane recovery (CO 2 ‐ECBM), was conducted, focusing on changes in the chemical and physical properties of coal. A high metamorphic grade anthracite was obtained from Qinshui Basin in China. Powdered coal was reacted with deionized water and carbon dioxide at …

Carbon Dioxide Storage in Coal Seams with Enhanced Coalbed ...

confirm that fractured coal seams have the potential to sequester carbon dioxide and increase methane production. It was demonstrated through the use of perfluorocarbon tracers that there is a connection through the coal matrix between the injection well and

Upgrading Upper Kittanning Seam coal quality to improve ...

@article{osti_6002089, title = {Upgrading Upper Kittanning Seam coal quality to improve power plant performance: Coal cleaning test facility campaign report No. 6}, author = {Moorhead, R G and Torak, E R and Jenko, R J and Cavalet, J R}, abstractNote = {A comprehensive Coal Cleanability Characterization to assess the effects of improved coal quality on boiler performance is presented.