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Journal Article
Journal: AAPG Bulletin
Published: 01 October 2023
AAPG Bulletin (2023) 107 (10): 1781–1797.
...Lei Han; Jian Shen; Jing Qu; Changjiang Ji; Huijie Cheng Abstract The micro-occurrence state and the mobility of irreducible water in coal is important in achieving high coalbed methane (CBM) production. Displacement system and computed tomography experiments were conducted using high-rank coals...
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Journal Article
Journal: AAPG Bulletin
Published: 01 February 2023
AAPG Bulletin (2023) 107 (2): 213–241.
...Haihai Hou; Longyi Shao; Yue Tang; Zhen Li; Sheng Zhao; Minglei Yao; Xuetian Wang; Jiaqiang Zhang ABSTRACT This study aimed to quantitatively characterize pore structure of middle- and high-ranked coal reservoirs in northern China. A total of 51 coal samples from the three coalbed methane (CBM...
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Journal Article
Published: 01 June 2021
Jour. Geol. Soc. India (2021) 97 (6): 643–648.
... group macerals (mean 71.8%) with a significant amount of the liptinite (17.4%) group maceral, while the concentration of inertinite group is less (3.1%). Vitrinite reflectance (0.38 to 0.69 %Ro m ), indicates that the rank of Sutunga coals as sub-bituminous ‘B’ to high volatile bituminous ‘C...
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Journal Article
Journal: Geophysics
Published: 18 November 2019
Geophysics (2020) 85 (1): S1–S10.
... possess sparse characteristics, and the diffractions adhering to Huygens’ principle behave as low-rank components. Therefore, we have developed a 3D low-rank diffraction imaging method that uses the Mahalanobis-based low-rank and sparse matrix decomposition method for separating and imaging 3D...
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Journal Article
Journal: AAPG Bulletin
Published: 15 July 2019
AAPG Bulletin (2019) 103 (7): 1653–1690.
... Association of Petroleum Geologists. All rights reserved. 2019 The Erlian Basin is located in the central northern Inner Mongolia Autonomous Region and, being rich in coal and coalbed methane (CBM) resources, has become one of the key research basins for China’s low-rank CBM exploration...
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Journal Article
Journal: AAPG Bulletin
Published: 15 June 2019
AAPG Bulletin (2019) 103 (6): 1297–1319.
...Junpeng Zou; Weizhong Chen; Diansen Yang; Jingqiang Yuan; Yu-Yong Jiao ABSTRACT Low-rank coal reserves account for nearly 55% of the national coal reserves in China, and it is extremely important to understand their anisotropic microstructure and coalbed methane storage and sorption characteristics...
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Series: GSA Special Papers
Published: 14 June 2019
DOI: 10.1130/2018.2541(10)
EISBN: 9780813795416
.... These maturity variations along regional fault zones are connected with varying deformation intensity and explained by unequal conductive heat flow. In the Kap Washington Group, the high coal rank attaining 5.4% R r is associated with ductile deformation, and is additionally influenced by magmatic activity, i.e...
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Journal Article
Journal: AAPG Bulletin
Published: 15 January 2019
AAPG Bulletin (2019) 103 (1): 189–213.
... )] × 100%; CH 4 = methane (air-free basis); CO 2 = carbon dioxide (air-free basis); D = deuterium; n = not analyzed; N 2 = nitrogen (air-free basis). Table 5. Comparative Analysis of Gas Component and Stable Isotopic Values between the Southern Junggar Basin and Typical Low- to Medium-Rank...
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Journal Article
Journal: Interpretation
Published: 09 March 2018
Interpretation (2018) 6 (2): T271–T281.
... in situ stress field of a coal reservoir with a high coal rank. The results indicated that the horizontal stress field within the coal reservoir is controlled by the burial depth, folding, and faulting. The σ H and σ h values within the coal reservoir are 1–2.5 MPa higher than those within the clastic...
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Journal Article
Published: 01 March 2018
Russ. Geol. Geophys. (2018) 59 (3): 299–312.
..., with large thickness, intermediate coal rank and stable distribution, is considered as one target formation favorable for CBM enrichment ( Chen et al., 2009 ). The conjugated shear joints in the Quarternary loess are considered as the result of tectonic stress, as in the other types of rocks ( Wang...
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Journal Article
Journal: AAPG Bulletin
Published: 01 January 2018
AAPG Bulletin (2018) 102 (1): 153–174.
...Chenghua Ou; Chaochun Li; Dongming Zhi; Lie Xue; Shuguang Yang ABSTRACT To reveal the resource potential of low-rank coalbed methane (LRCBM) and determine the favorable area from six different zones in the southern Junggar Basin in China, a new LRCBM assessment methodology was developed...
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Journal Article
Journal: Palynology
Published: 22 December 2017
Palynology (2017) 41 (0): 221–246.
.... Dry, ash-free volatile matter contents of the coal samples from the study section averaged 45.83% ( Appendix 1 ), which is indicative of a high volatile carbon (C) bituminous rank assignment (Stach et al. 1982 ). The stratigraphically lower Vancleve coal bed, which is in close proximity...
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Journal Article
Published: 01 September 2016
Jour. Geol. Soc. India (2016) 88 (3): 339–349.
... 11 2014 17 11 2015 01 09 2016 Copyright © 2016 Geological Society of India 2016 Geological Society of India Indian coal High sulfur coal Mineral matters in coal Ash Fusion Temperatures Ultrasonication Low rank coal Coal is regarded as the fossil fuel that has...
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Journal Article
Published: 01 May 2016
Jour. Geol. Soc. India (2016) 87 (5): 525–534.
... of liptite, clarodurite, duroclarite and vitrinertoliptite are insignificant. The mean vitrinite reflectance of the Karharbari coal is higher than that of the Barakar coals. The vitrinite reflectance values rank the Karharbari coal as High volatile Bituminous ‘C’ to High Volatile ‘B’ Bituminous...
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Journal Article
Published: 22 April 2016
Geological Magazine (2017) 154 (3): 591–608.
...-sedimentary complexes attained high maturation levels, equivalent to anthracite coal rank (3.0–3.5% R oran ), which pre-dates the middle Moscovian Santa Susana Basin. The Santa Susana Basin attained moderate maturation levels equivalent to bituminous coal rank (1.35–1.5% R oran ) recording a second episode...
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Journal Article
Journal: AAPG Bulletin
Published: 01 November 2015
AAPG Bulletin (2015) 99 (11): 2099–2119.
...Changan Shan; Tingshan Zhang; Junjie Guo; Zhao Zhang; Yang Yang ABSTRACT To gain a better understanding of the characteristics of micropore systems in high-rank coal reservoirs, 51 coal core samples collected from 16 wells were examined by maceral analysis, proximate analysis, scanning electron...
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Journal Article
Published: 01 November 2015
Jour. Geol. Soc. India (2015) 86 (5): 535–546.
...S. Mahesh; Srikanta Murthy; Vikram Partap Singh; Jyoti Shankar Roy Abstract: Petrographic analysis of the coals from bore core EBM-1 of East Bokaro Coalfield revealed characteristic changes as a result of thermal alteration by an intrusive body. The enhancement of ‘rank’ (increase in the VR r...
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Journal Article
Journal: AAPG Bulletin
Published: 01 October 2015
AAPG Bulletin (2015) 99 (10): 1803–1825.
...Jorge Mariño; Stephen Marshak; Maria Mastalerz ABSTRACT Coal rank reflects the temperature of coalification, with higher rank coal forming at higher temperatures. If the temperature of coalification depended only on the Earth’s geothermal gradient, then the maximum rank of coal in a sedimentary...
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Journal Article
Published: 01 January 2015
Jour. Geol. Soc. India (2015) 85 (1): 107–110.
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Journal Article
Journal: AAPG Bulletin
Published: 01 December 2014
AAPG Bulletin (2014) 98 (12): 2581–2610.
...M. D. Lewan; M. J. Kotarba ABSTRACT Hydrous-pyrolysis experiments at 360°C (680°F) for 72 h were conducted on 53 humic coals representing ranks from lignite through anthracite to determine the upper maturity limit for hydrocarbon-gas generation from their kerogen and associated bitumen (i.e...
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