Reservoir Science
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TY - JOUR AU - Cao, Lili AU - Lv, Man AU - Li, Chaoying AU - Sun, Quan AU - Wu, Maoquan AU - Xu, Chenxi AU - Dou, Jingwen PY - 2025 DA - 2025/10/28 TI - Effects of Crosslinking Agents and Reservoir Conditions on the Propagation of Fractures in Coal Reservoirs During Hydraulic Fracturing JO - Reservoir Science T2 - Reservoir Science JF - Reservoir Science VL - 1 IS - 1 SP - 36 EP - 51 DO - 10.62762/RS.2025.494074 UR - https://www.icck.org/article/abs/RS.2025.494074 KW - enhanced oil recovery KW - reservoir transformation KW - coalbed methane mining KW - water-based fracturing KW - low permeability reservoir AB - Low fracturing efficiency and high permeability filtration present substantial challenges during the fracturing development of coalbed methane (CBM), significantly hindering its efficient exploitation. In this study, a cross-linker featuring specific polar functional groups on its side chains was synthesized, and a multi-functional coupling evaluation apparatus was developed to systematically investigate the performance characteristics of water-based fracturing fluids. Furthermore, molecular dynamics simulations were employed to elucidate the microscopic mechanisms by which the modified cross-linkers and various external factors influence CBM extraction efficiency. The results indicated that the modified water-based fracturing fluid enhances fracture propagation and reduces fluid filtration into the reservoir. Increasing the concentration of the cross-linker (0wt% to 0.3wt%) improves both gas production efficiency and fracture expansion capacity (20m of crack length to 36m). Conversely, elevated reservoir temperatures (383K to 433K) markedly decrease gas recovery efficiency while significantly increasing fluid seepage (5.8ml to 7.5ml) and expansion capacity (26m of crack length to 42m). In contrast, higher reservoir pressure demonstrates an opposite trend by enhancing extraction efficiency and mitigating fluid filtration. The alteration of chemical bonding interactions between fluid molecules is identified as a key microscopic mechanism influencing CBM development, thereby offering a theoretical foundation for optimizing water-based fracturing strategies in low-permeability coal reservoirs. SN - 3070-2356 PB - Institute of Central Computation and Knowledge LA - English ER -
@article{Cao2025Effects,
author = {Lili Cao and Man Lv and Chaoying Li and Quan Sun and Maoquan Wu and Chenxi Xu and Jingwen Dou},
title = {Effects of Crosslinking Agents and Reservoir Conditions on the Propagation of Fractures in Coal Reservoirs During Hydraulic Fracturing},
journal = {Reservoir Science},
year = {2025},
volume = {1},
number = {1},
pages = {36-51},
doi = {10.62762/RS.2025.494074},
url = {https://www.icck.org/article/abs/RS.2025.494074},
abstract = {Low fracturing efficiency and high permeability filtration present substantial challenges during the fracturing development of coalbed methane (CBM), significantly hindering its efficient exploitation. In this study, a cross-linker featuring specific polar functional groups on its side chains was synthesized, and a multi-functional coupling evaluation apparatus was developed to systematically investigate the performance characteristics of water-based fracturing fluids. Furthermore, molecular dynamics simulations were employed to elucidate the microscopic mechanisms by which the modified cross-linkers and various external factors influence CBM extraction efficiency. The results indicated that the modified water-based fracturing fluid enhances fracture propagation and reduces fluid filtration into the reservoir. Increasing the concentration of the cross-linker (0wt\% to 0.3wt\%) improves both gas production efficiency and fracture expansion capacity (20m of crack length to 36m). Conversely, elevated reservoir temperatures (383K to 433K) markedly decrease gas recovery efficiency while significantly increasing fluid seepage (5.8ml to 7.5ml) and expansion capacity (26m of crack length to 42m). In contrast, higher reservoir pressure demonstrates an opposite trend by enhancing extraction efficiency and mitigating fluid filtration. The alteration of chemical bonding interactions between fluid molecules is identified as a key microscopic mechanism influencing CBM development, thereby offering a theoretical foundation for optimizing water-based fracturing strategies in low-permeability coal reservoirs.},
keywords = {enhanced oil recovery, reservoir transformation, coalbed methane mining, water-based fracturing, low permeability reservoir},
issn = {3070-2356},
publisher = {Institute of Central Computation and Knowledge}
}
Copyright © 2025 by the Author(s). Published by Institute of Central Computation and Knowledge. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/), which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. 
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