Hydraulic fracturing design for coalbed methane in Barito Basin, Indonesia

Heo, Wiri; Lee, Won Suk; Lee, Dong Hoon

doi:10.1080/12269328.2015.1023468

Cited by 11 publications

(5 citation statements)

References 28 publications

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“…If groundwater is abundant in the mine, it can increase the pressure within the goaf. Some coalbed methane may dissolve in the water or re-adsorb onto the surrounding rocks, which can further destabilise the coalbed methane production of extraction wells in abandoned mines [22]. Thus, determining suitable locations to drill wells for extracting coalbed methane is very difficult.…”

Section: Geological Model Of An Abandoned Minementioning

confidence: 99%

Methods for the Geophysical Exploration and Sustainable Utilisation of Coalbed Methane Resources in Abandoned Mines of Shanxi, China

Liu,

Li,

2024

Sustainability

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Underground coal mining results in large goafs and numerous abandoned mines that contain substantial amounts of coalbed methane. If this methane is not used and controlled, it will escape into the atmosphere through geological fractures and can result in serious greenhouse gas effects and environmental damage. Exploring and developing the coalbed methane resources of abandoned mines can not only improve coal mine safety and protect the ecological environment but also reuse waste and mitigate energy shortages. Geophysical methods have made some progress in detecting abandoned coal mines, but there are still some challenges and difficulties. The resolution of seismic exploration may not be enough to accurately describe the details of coal seams and CBM rich areas, and the effect of resistivity method in deep CBM exploration is limited. In addition, the geological structure of abandoned coal mines is usually more complex, such as faults, folds, etc., which makes the application of exploration methods more difficult and increases the difficulty of data interpretation. Therefore, it is necessary to develop and perfect exploration technology continuously including the application of geophysical big data, deep learning, and artificial intelligence inversion to realize the accurate detection and evaluation of CBM resources in abandoned coal mines.

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Section: Geological Model Of An Abandoned Minementioning

confidence: 99%

Methods for the Geophysical Exploration and Sustainable Utilisation of Coalbed Methane Resources in Abandoned Mines of Shanxi, China

Liu,

Li,

2024

Sustainability

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“…Coalbed methane (CBM) extraction can effectively alleviate energy shortages, improve mine safety, and reduce greenhouse gas emissions. In recent years, measures such as hydraulic slotting, hydraulic cavitating, chemical stimulation to promote the exploitation of CBM have been applied. − The strong heterogeneity and low permeability of coal reservoirs make it difficult to effectively exploit CBM by conventional methods. − Hydraulic fracturing is an effective method to improve the permeability of rock masses − and, in recent years, has been increasingly used in coal reservoirs. − Hydraulic fracturing involves the injection of high-pressure fracturing fluids into a rock mass to produce fractures, thus increasing permeability. The fracturing fluid is the core component of the hydraulic fracturing process.…”

Section: Introductionmentioning

confidence: 99%

Physicochemical Effect on Coal Pores of Hydrocarbon Chain Length and Mixing of Viscoelastic Surfactants in Clean Fracturing Fluids

Yang,

Zhang,

Zhang

et al. 2024

ACS Omega

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Clean fracturing fluids are environmentally friendly and could have broad applications in permeability enhancement of coal seams. The hydrophobic chain length of the viscoelastic surfactant (VES) and the mixing of VESs with different ionic types have marked effects on the performance of clean fracturing fluids. This paper analyzes the effects of the hydrocarbon chain length of VES and mixing of VESs with different ion types on the pores of coal and discusses the mechanisms controlling the pore changes from a physical and chemical perspective. We found that the coal samples treated with clean fracturing fluid B had the largest porosity change. Adding two methylene groups to the hydrocarbon chain of the cationic VES will increase clay swelling in coal treated with fracturing fluids. Adding 0.1 wt % cocoamidopropyl betaine (zwitterionic VES) to cationic VES fracturing fluids can reduce the extent of clay expansion induced by fracturing fluids. VES with a long hydrocarbon chain has a strong ability to remove kaolinite in hard coal, and the addition of zwitterion VES increases the ability of a clean fracturing fluid to remove kaolinite. These results provide theoretical guidance for the synthesis of new VES molecules and the design of new fracturing fluid formulations.

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“…CBM wells need to undergo hydraulic fracturing to enter the stage of drainage and production. The quality of hydraulic fracturing directly affects the level of gas production in the later stage [4,5].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Damage of Artificial Fracture Permeability in Coal during the Flow Back of Guar-Based Fracturing Fluid

et al. 2020

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After the completion of fracturing operation in coalbed methane (CBM), the fracturing fluid needs to flow back to the ground in time to reduce the damage to the coal reservoir. The damage of guar-based fracturing fluid to the coal reservoir has an adverse effect on the fracturing stimulation. A series of flow experiments were carried out with the unconventional natural gas reservoir damage evaluation equipment. This paper investigates the evolution of fracture permeability in coal samples during the process of hydroxypropyl guar (HPG) fracturing fluid flow back. The experimental results show that the fracturing fluid concentration, proppant type, proppant particle size, and proppant concentration all affect fracture permeability. The high concentration of fracturing fluid caused irreversible damage to fracture permeability of coal samples. With the increase of fracturing fluid concentration, the permeability damage rate increased from 65.31% to 84.57%, and the damage degree was strong. KCL brine flushing can only decrease the damage rate of coal sample fracture permeability within a certain range. The proppant embedment and the generation of pulverized coal exacerbated the damage of fracture permeability. The research results can be beneficial for optimizing the type and performance of fracturing fluid for hydraulic fracturing in CBM reservoir.

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Hydraulic fracturing design for coalbed methane in Barito Basin, Indonesia

Cited by 11 publications

References 28 publications

Methods for the Geophysical Exploration and Sustainable Utilisation of Coalbed Methane Resources in Abandoned Mines of Shanxi, China

Methods for the Geophysical Exploration and Sustainable Utilisation of Coalbed Methane Resources in Abandoned Mines of Shanxi, China

Physicochemical Effect on Coal Pores of Hydrocarbon Chain Length and Mixing of Viscoelastic Surfactants in Clean Fracturing Fluids

Experimental Study on the Damage of Artificial Fracture Permeability in Coal during the Flow Back of Guar-Based Fracturing Fluid

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