scholarly journals Simulation of Gas Production Mechanisms in Shear Deformation of Medium-Rank Coal

ACS Omega ◽  
2021 ◽  
Author(s):  
Xiangyun Wan ◽  
Yanhui Yang ◽  
Bing Jia ◽  
Jienan Pan
Keyword(s):  
Shear Deformation ◽  
Gas Production ◽  
Production Mechanisms

Understanding Shale Gas Production Mechanisms Through Reservoir Simulation

2014 ◽  
Author(s):  
Hao Sun ◽  
Adwait Chawathe ◽  
Hussein Hoteit ◽  
Xundan Shi ◽  
Lin Li
Keyword(s):  
Shale Gas ◽  
Reservoir Simulation ◽  
Gas Production ◽  
Production Mechanisms

scholarly journals Brief Communication: The reliability of gas extraction techniques for analysing CH<sub>4</sub> and N<sub>2</sub>O compositions in gas trapped in permafrost ice-wedges

2019 ◽  
Author(s):  
Ji-Woong Yang ◽  
Jinho Ahn ◽  
Go Iwahana ◽  
Sangyoung Han ◽  
Kyungmin Kim ◽  
...  
Keyword(s):  
Nitrous Oxide ◽  
Soil Aggregates ◽  
Extraction Methods ◽  
Gas Production ◽  
Gas Extraction ◽  
Extraction Techniques ◽  
Mixing Ratios ◽  
Gas Molecules ◽  
Ch4 And N2o ◽  
Production Mechanisms

Abstract. Methane (CH4) and nitrous oxide (N2O) compositions in ground ice may provide information on their production mechanisms in permafrost. However, existing gas extraction methods has not been well tested. We test conventional wet and dry gas extraction methods using ice-wedges from Alaska and Siberia. We find that both methods extract gas from the easily extractable parts of the ice (e.g., gas bubbles), and yield similar results for CH4 and N2O mixing ratios. We also find insignificant effects of microbial activity during wet extraction. However, both techniques are unable to fully extract gas from the ice, presumably because gas molecules adsorbed onto or enclosed in soil aggregates are not easily extractable. Estimation of gas production in subfreezing environment of permafrost should consider the incomplete gas extraction.

Investigations Into Devonian Shale Gas Production Mechanisms in Southern Ohio

1984 ◽  
Author(s):  
T.W. Thompson ◽  
R.A. McBane ◽  
Gary Sitler ◽  
Jon Strawn ◽  
Mark Moody
Keyword(s):  
Shale Gas ◽  
Gas Production ◽  
Devonian Shale ◽  
Production Mechanisms

Devonian Shale Gas Production: Mechanisms and Simple Models

1991 ◽  
Vol 43 (04) ◽  
pp. 476-482 ◽  
Author(s):  
Eric S. Carlson ◽  
James C. Mercer
Keyword(s):  
Shale Gas ◽  
Gas Production ◽  
Devonian Shale ◽  
Production Mechanisms ◽  
Simple Models

scholarly journals Brief Communication: The reliability of gas extraction techniques for analysing CH<sub>4</sub> and N<sub>2</sub>O compositions in gas trapped in permafrost ice wedges

2020 ◽  
Vol 14 (4) ◽  
pp. 1311-1324
Author(s):  
Ji-Woong Yang ◽  
Jinho Ahn ◽  
Go Iwahana ◽  
Sangyoung Han ◽  
Kyungmin Kim ◽  
...  
Keyword(s):  
Soil Aggregates ◽  
Extraction Methods ◽  
Gas Production ◽  
Gas Extraction ◽  
Extraction Techniques ◽  
Ground Ice ◽  
Mixing Ratios ◽  
Gas Molecules ◽  
Ch4 And N2o ◽  
Production Mechanisms

Abstract. Methane (CH4) and nitrous oxide (N2O) compositions in ground ice may provide information on their production mechanisms in permafrost. However, existing gas extraction methods have not been well tested. We tested conventional wet and dry gas extraction methods using ice wedges from Alaska and Siberia, finding that both methods can extract gas from the easily extractable parts of the ice (e.g. gas bubbles) and yield similar results for CH4 and N2O mixing ratios. We also found insignificant effects of microbial activity during wet extraction. However, both techniques were unable to fully extract gas from the ground ice, presumably because gas molecules adsorbed onto or enclosed in soil aggregates are not easily extractable. Estimation of gas production in a subfreezing environment of permafrost should consider such incomplete gas extraction.

Application Of Electron Probe Analyses Of Minerals In Discussing The Relationship Between Ductile Deformation And Metamorphism

1990 ◽  
Vol 48 (2) ◽  
pp. 250-251
Author(s):  
Fan Guochuan ◽  
Sun Zhongshi
Keyword(s):  
Chemical Composition ◽  
Shear Deformation ◽  
Electron Probe ◽  
General Rule ◽  
Granulite Facies ◽  
Ductile Deformation ◽  
Higher Temperature ◽  
Ductile Shear ◽  
The Relationship ◽  
Ductile Shear Deformation

Under influence of ductile shear deformation, granulite facies mineral paragenesis underwent metamorphism and changes in chemical composition. The present paper discusses some changes in chemical composition of garnet in hypers thene_absent felsic gnesiss and of hypersthene in rock in early and late granulite facies undergone increasing ductile shear deformation .In garnet fetsic geniss, band structures were formed because of partial melting and resulted in zoning from massive⟶transitional⟶melanocrate zones in increasing deformed sequence. The electron-probe analyses for garnet in these zones are listed in table 1 . The Table shows that Mno, Cao contents in garnet decrease swiftly from slightly to intensely deformed zones.In slightly and moderately deformed zones, Mgo contents keep unchanged and Feo is slightly lower. In intensely deformed zone, Mgo contents increase, indicating a higher temperature. This is in accord with the general rule that Mgo contents in garnet increase with rising temperature.

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