Experimental Investigation on the Impact of Coal Fines Migration on Pores and Permeability of Cataclastic Coal [PDF]
ACS Omega, 2023 During the production process of coalbed methane, the generation and migration of coal fines can obstruct fractures in coal reservoirs and reduce their permeability. In order to investigate the effects of coal fines migration on the porosity and permeability of coal reservoirs, we conducted core water flooding experiments, low-field nuclear magnetic ...
Tiancheng Xie +5 more
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An Experimental Study on Coal Fines Migration during Single Phase Water Flow [PDF]
Geofluids, 2020 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
Wenlong Han +5 more
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Numerical Simulation Study of Fines Migration Impacts on an Early Water Drainage Period in Undersaturated Coal Seam Gas Reservoirs [PDF]
Geofluids, 2019 Coal fines migration exerts negative impacts on early water drainage of undersaturated coal seam gas (CSG) reservoirs. The complicated migration process results in ineffective and inaccurate forecast of coal fines production.
Xiaolong Peng +6 more
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The migration and deposition patterns of coal fines and their initiation mechanisms during the gas–water two-phase flow stage in coalbed methane wells [PDF]
International Journal of Coal Science & TechnologyThe deposition of coal fines in fractures reduces fracture conductivity and hampers efficient coalbed methane production. The results of the multiphase flow visualization experiment indicate that, at low flow rates, fines primarily deposit at the bottom ...
Wei Li +5 more
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Coal fines migration: A holistic review of influencing factors
Advances in Colloid and Interface Science, 2021 Coal fines can substantially influence coal seam gas reservoir permeability, thus impeding the flow of gas in coal microstructure. The coal fines generation and migration are influenced by several factors, wherein coal fines are generally hydrophobic and aggregate in natural coal seam gas (CSG) under prevailing conditions of pH, salinity, temperature ...
Faisal Ur Rahman Awan +3 more
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Experimental Investigation of the Impact of Coal Fines Migration on Coal Core Water Flooding [PDF]
Sustainability, 2018 Coalbed Methane (CBM) has become an important gas resource in recent decades. The brittle property of coal matrix and overactive operation make the migration of coal fines inevitable. Blockage by coal fines that plugs flow paths is a non-negligible issue that results in a significant decline in gas production.
Dapeng Gao +3 more
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Numerical simulation study on influence of coal fines migration on porosity and permeability in cataclastic coal [PDF]
Youqicang pingjia yu kaifaDuring coalbed methane (CBM) production, coal fines within the reservoir can migrate, potentially blocking pore throats and resulting in a significant reduction in reservoir permeability. This process adversely affects the final CBM yield. To investigate
SHI Hui, XIE Tiancheng, LIU Ziliang, JIANG Zhikun, WEI Yingchun
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Gas Science and Engineering, 2023 Coalbed methane reservoirs generate coal fines during production that cause irreversible damage to cleat conductivity. In severe scenarios, this can result in temporary closure of recovery operations from the gas well(s). In this work, we simulate the impact of coal fines on proppant conductivity.
Faisal Ur Rahman Awan +4 more
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The CO2 storage in coal seams at the influence of coal fines migration
, 2023 Abstract: the pressure of the coal seam decays to a certain value due to the production of CH4, the production wells are switched to CO2 injection wells. The injection of CO2 can improve the CH4 recovery and realize the CO2 geological storage.The reverse migration of coal fines produced in the CH4 development stage can be caused by CO2 injection, which
Qian Wang +3 more
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Effect of hydrochemical properties on the migration of coal fines in propped fractures
Meitan xuebao, 2023 The problem of coal fines restricts the efficient development of coalbed methane in China. The coal sample of No. 3 coal seam in the Shanxi Formation in the Hancheng mining area was selected for carrying out a physical simulation experiment on the effect
Ziliang LIU +5 more
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