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Stable Dispersion of Coal Fines during Hydraulic

2020-7-6  In subterranean coal seam gas (CSG) reservoirs, massive amounts of small-sized coal fines are released during the production and development stages, especially during hydraulic fracturing stimulation. These coal fines inevitably cause mechanical pump failure and permeability damage due to aggregation and subsequent pore-throat blockage. This aggregation behavior is thus of key

Structural Rearrangement of Strained Coals Energy

2019-5-26  Native coals are strained and glassy. When coals are swollen, this strain is relieved as the coal structure rearranges to a lower free energy and more highly noncovalently associated state. Four coals ranging in carbon content from 77% C to 84% C were warmed in the weak swelling solvent chlorobenzene at 132 °C for 2 weeks and samples were withdrawn at intervals. After evaporation of

(PDF) Stable Dispersion of Coal Fines during Hydraulic

These coal fines inevitably cause mechanical pump failure and permeability damage due to aggregation and subsequent pore throat blockage. This aggregation behavior is thus of key importance in CSG

Coal solubilization. Factors governing successful

2019-5-25  Effect of Tetrabutylammonium Acetate Addition on the Aggregation of Coal Molecules at Solution and Solid States. Energy & Fuels 2001, 15 (2),Chemistry and palynology of carbon seams and associated rocks from the Witwatersrand goldfields, South Africa. Ore Geology Reviews 1990, 5

Characteristics and generation mechanisms of coal

2016-8-1  The Shanxi Formation in the southern Qinshui Basin has 4–7 coal seams (Liu et al., 2014a, Liu et al., 2015). Coal seam #3 is a single-layer coal seam with a thickness between 5 and 8 m (Liu et al., 2014a, Liu et al., 2015). This bed is the main target for exploring and developing CBM and the target coal seam of this study. 2.2.

A Comparative Study of the Coal‐forming

The coal‐forming characteristics, as well as the similarities and differences between epicontinental sea basins and continental marginal sea basins developed during different time periods, were analy...

Stable Dispersion of Coal Fines during Hydraulic

2020-7-6  bituminous coal fines were subjected to water flow,13 while another study observed that conductivity is reduced by 24.4% when only 2% of coal fines flowed into a proppant pack.23 Therefore, coal fines pose a significant threat to the permeability and production of methane from coal seams where minimizing this phenomenon would be hugely

煤中稀土元素分布特征及其开发利用前景 CHINACAJ

The United States in 2012 launched a major research project to extract rare earth from coal and its combustion products,and has made some important progresses,which deserves our close attention. China has abundant coal resources and diverse coal types. In

Controls on migration and aggregation for

Tectonically deformed coal (TDC) develops because of the superimposed deformation and metamorphism of a coal seam by tectonic movements. The migration and accumulation of trace elements in TDC is largely in response to stress-strain conditions. To develop a law governing the migration and aggregation of sensitive elements and investigate the geological controls on TDC, coal samples from

Chemical stimulation for enhancing coal seam

2020-2-15  1. Introduction. Commercial coal seam gas (CSG) extraction has been well established in a number of countries throughout the world, including the USA, Australia, China, India and Canada (Underschultz, 2016).The permeability of coal is a key controlling factor for gas migration in coal reservoirs and is often a critical technical barrier preventing economically viable gas production

Stable Dispersion of Coal Fines during Hydraulic

2020-7-6  bituminous coal fines were subjected to water flow,13 while another study observed that conductivity is reduced by 24.4% when only 2% of coal fines flowed into a proppant pack.23 Therefore, coal fines pose a significant threat to the permeability and production of methane from coal seams where minimizing this phenomenon would be hugely

Coal Seam Gas Water Management Issues

2010-6-15  Coal Seam Gas Water Management Policy consultation with industry. • Dams necessary for water aggregation and the storage of brine from treatment facilities are to be fully lined to a standard determined by DERM. • CSG producers are responsible for treating and disposing of CSG water. •

煤中稀土元素分布特征及其开发利用前景 CHINACAJ

The United States in 2012 launched a major research project to extract rare earth from coal and its combustion products,and has made some important progresses,which deserves our close attention. China has abundant coal resources and diverse coal types. In

[Study on the Relationship between the Inhalable Fine

2015-7-3  These membranes were evident from the aggregation of silica and a Ca-Al membrane. Compared with that of other coal seams, C1 coal generated a mass of impurities, in which several particles have irregular shape. We found nanoscale fine particles in some

The role of volatiles and coal structural variation in coal

Abstract We investigated the role of volatiles in the porous structure of coal samples and the corresponding structural deformations that affect the coals’ methane adsorption capacity. For this study, the volatiles in coal were gradually removed by extraction.

18 AUGUST 2016 TABLE 1 CHECKLIST OF Whitehaven

2020-3-8  Coal seams intersected by non-cored drill holes were not sampled for quality analysis. Coal Data aggregation methods Coal intersections may have been sampled in multiple sections per seam/ply, so compositing of samples, on a length x RD basis has been applied. Where quoted coal

TPO36阅读真题解析-百利天下托福

2018-3-2  百利天下托福资料下载栏目免费给各复习备考阶段考生提供所需复习资料,包括TPO,托福真题,托福口语,托福听力,托福阅读,托福写作,托福词汇,托福综合等精品资料。

Energy & Fuels期刊最新论文, 化学 • 材料, X-MOL

Energy & Fuels期刊最新论文,,顶级期刊最新论文图文内容,出版社网站每日同步更新,点击标题直达论文原文,自定义关注的期刊,覆盖PubMed的论文库,快速方便精准的找到您想要的论文

Coal Seam Gas Water Management Issues

2010-6-15  Coal Seam Gas Water Management Policy consultation with industry. • Dams necessary for water aggregation and the storage of brine from treatment facilities are to be fully lined to a standard determined by DERM. • CSG producers are responsible for treating and disposing of CSG water. •

Confident Arrow Energy moves into coal-seam top gear

In some coal seams, hydraulic fracturing, or fracking, "excites" the seam and increases the flow of gas in the water that comes from the seam. Fracking means pumping water and sand, and in some

SIGNIFICANT INCREASE TO HUNTER VALLEY COAL

2014-11-27  Coal loss and dilution factors were also applied and vary by the equipment type uncovering the various coal seams (i.e. excavator/truck versus dragline). Typical roof and floor coal loss thickness ranges from 2cm to 25cm. Typical roof and floor waste dilution thickness ranges from 2cm to 7cm.

Webinar Recent Advances in CO2 EOR Reservoir

2016-11-15  ‒ Aggregation into larger particles ‒ Suspended component • Deposition ‒ Surface deposition, plugging deposition and re-entrainment coal-seams − Geomechanics Perkins and Johnston 1963 Advances in Hybrid EOR Processes LSWI, Foam, etc. CO 2

Geology in coal resource utilization (Book) OSTI.GOV

2021-1-26  @article{osti_7033504, title = {Geology in coal resource utilization}, author = {Peters, D C}, abstractNote = {The 37 papers in this book were compiled with an overriding theme in mind: to provide the coal industry with a comprehensive source of information on how geology and geologic concepts can be applied to the many facets of coal resource location, extraction, and utilization.

18 AUGUST 2016 TABLE 1 CHECKLIST OF Whitehaven

2020-3-8  Coal seams intersected by non-cored drill holes were not sampled for quality analysis. Coal Data aggregation methods Coal intersections may have been sampled in multiple sections per seam/ply, so compositing of samples, on a length x RD basis has been applied. Where quoted coal

Maiden 301Mt Coking Coal Resource at Debiensko

· Attractive coal quality parameters within all seams with the proven potential to produce high quality hard coking coal · Size of Resource and proximity to European steel mills and coking plants highlights the globally signigicant scale of Debiensko and its strategic importance to Europe's steelmaking industry · Coking coal market fundamentals and regional supply / demand dynamics are

TPO36阅读真题解析-百利天下托福

2018-3-2  百利天下托福资料下载栏目免费给各复习备考阶段考生提供所需复习资料,包括TPO,托福真题,托福口语,托福听力,托福阅读,托福写作,托福词汇,托福综合等精品资料。

梁运培-资源与安全学院 cqu.edu

2017-10-24  Correlation between coal and gas outburst risk and adsorption properties of coal seams, Energy Science & Engineering 2019, 36. Li Bo,Liang, Yun-pei,Zhang, Lei. Breakage law and fractal characteristics of broken coal and rock masses with different mixing 37.

An Experimental Study on Coal Fines Migration during

Coal fines migration and intrusion in coal fractures affect coalbed methane (CBM) wells performance by reducing reservoir permeability and production continuity. Physical simulations are conducted to investigate the permeability variation under different diameter coal fines intrusion at various flow velocities and confining pressures. The results show that the conductivity of fractures is