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Author

Fansheng Huang

Other affiliations: Southwest Petroleum University
Bio: Fansheng Huang is an academic researcher from China University of Petroleum. The author has contributed to research in topics: Coalbed methane & Water flow. The author has an hindex of 4, co-authored 6 publications receiving 126 citations. Previous affiliations of Fansheng Huang include Southwest Petroleum University.

Papers
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Journal ArticleDOI
TL;DR: In this paper, the effect of hydraulic fluid on multi-scale mass transport, including methane desorption, diffusion and percolation, was investigated on an anthracite coal from the Qinshui Basin.

67 citations

Journal ArticleDOI
15 Jun 2018-Fuel
TL;DR: In this article, the authors quantify the impact of moving bubbles/GWIs on fines detachment, aiming at better understanding of fines mobilization mechanisms in bubble-water flow towards their effective control.

58 citations

Journal ArticleDOI
TL;DR: In this paper, the authors investigate critical flow conditions for massive fines detachment in the dewatering phase, for the purpose of yielding an improved understanding of fines detachment mechanisms and their effective control in the field.
Abstract: Fines migration has posed a great challenge to gas and water production in CBM reservoirs, resulting not only in dramatic permeability reduction but also in excessive wear on equipment. The objective of this study was to investigate critical flow conditions for massive fines detachment in the dewatering phase, for the purpose of yielding an improved understanding of fines detachment mechanisms and their effective control in the field. First, fines migration experiments under saturated conditions, including effluent concentration and permeability measurements, were conducted at elevated pressure gradients on fractured coal samples with various apertures. Experimental results indicate the existence of a critical pressure gradient (CPG) for massive fines detachment. Second, a mathematical model was developed to describe single particle detachment in the fracture, accounting for the coupling effects of hydrodynamic and extended-DLVO forces. Effects of fines size and fracture aperture on fines detachment were ...

47 citations

Journal ArticleDOI
TL;DR: In this article, the effects of proppant wettability and size on retention of coal fines in proplant packs during the dewatering stage were investigated, for their optimization to achieve a long-term and effective control of fines retention.
Abstract: Hydraulic fracturing is the main stimulation technique that enables the economic production of coalbed methane reservoirs. However, massive invasion and retention of coal fines in proppant packs can clog the pore spaces and lead to an impairment of fracture conductivity. In this study, the effects of proppant wettability and size on retention of coal fines in proppant packs during the dewatering stage were investigated, for their optimization to achieve a long-term and effective control of fines retention. First, a series of transport and retention experiments of coal fines were performed on saturated proppant packs with different proppant sizes and wettabilities. Herein, standard quartz sand was used as the proppant carrier, and its surface wettability was modified to either hydrophobicity or stronger hydrophilicity by treatment with fluorocarbon resin and piranha solution, respectively. The experimental results indicated that both the retained amount and the deposition rate coefficient of coal fines decreased with increasing proppant hydrophilicity (or decreasing proppant hydrophobicity) and size. For the proppants treated with piranha solution, almost no coal fines were retained in proppant packs. Second, the forces/torques acting on coal fines in the vicinity of proppants were analyzed to elucidate the underlying mechanisms responsible for the influence of proppant wettability and size on fines retention. The effective filter surface (EFS) parameter was estimated by analyzing forces/torques to evaluate the filtration performance of proppant packs. Theoretical results illustrated that the EFS value decreased with increasing proppant hydrophilicity and size. The EFS value for proppants treated with piranha solution was near zero, which was due to the chemically "unfavorable"retention condition induced by piranha solution treatment. The EFS exhibited a similar tendency to the retention of coal fines observed in experiments, which validated the model. Finally, the recommendations on fines retention control in proppant packs were provided.

14 citations

Journal ArticleDOI
TL;DR: In this article, the authors evaluated the effect of oxidization on the seepage capacity of coal reservoirs in coal seams of the Jurassic Xishanyao Formation in the Heishan Coal Mine, Toksun, Xinjiang, were selected as the study objects.

14 citations


Cited by
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11 Jun 2010
Abstract: The validity of the cubic law for laminar flow of fluids through open fractures consisting of parallel planar plates has been established by others over a wide range of conditions with apertures ranging down to a minimum of 0.2 µm. The law may be given in simplified form by Q/Δh = C(2b)3, where Q is the flow rate, Δh is the difference in hydraulic head, C is a constant that depends on the flow geometry and fluid properties, and 2b is the fracture aperture. The validity of this law for flow in a closed fracture where the surfaces are in contact and the aperture is being decreased under stress has been investigated at room temperature by using homogeneous samples of granite, basalt, and marble. Tension fractures were artificially induced, and the laboratory setup used radial as well as straight flow geometries. Apertures ranged from 250 down to 4µm, which was the minimum size that could be attained under a normal stress of 20 MPa. The cubic law was found to be valid whether the fracture surfaces were held open or were being closed under stress, and the results are not dependent on rock type. Permeability was uniquely defined by fracture aperture and was independent of the stress history used in these investigations. The effects of deviations from the ideal parallel plate concept only cause an apparent reduction in flow and may be incorporated into the cubic law by replacing C by C/ƒ. The factor ƒ varied from 1.04 to 1.65 in these investigations. The model of a fracture that is being closed under normal stress is visualized as being controlled by the strength of the asperities that are in contact. These contact areas are able to withstand significant stresses while maintaining space for fluids to continue to flow as the fracture aperture decreases. The controlling factor is the magnitude of the aperture, and since flow depends on (2b)3, a slight change in aperture evidently can easily dominate any other change in the geometry of the flow field. Thus one does not see any noticeable shift in the correlations of our experimental results in passing from a condition where the fracture surfaces were held open to one where the surfaces were being closed under stress.

1,557 citations

Journal ArticleDOI
15 Oct 2017-Fuel
TL;DR: In this paper, the chemical and physical properties of coal were investigated using FTIR and Raman spectroscopy, and correlations were established for these parameters, showing that coal structure is complex with three stage characteristics at R o ǫ = 0.4 −1.4−1.3, 1.3 −2.0% and 2.0 −4.0%.

397 citations

Journal ArticleDOI
TL;DR: In this article, a review of the ethical issues associated with current biofuel due to energy-food nexus is presented, and the authors suggest that algal biofuel could serve as an alternative.
Abstract: China relies heavily on fossil fuels to keep the wheel of its huge economy running. Fossil fuels are however not a sustainable energy source due largely to their environmental footprint and supply insecurity. These concerns have necessitated the need for alternative energy sources that are both renewable and environmentally friendly. This policy direction is in line with the Kyoto protocol that constrained countries to follow certain energy consumption pattern that encourages the use of less carbon intensive energy sources. In line with this protocol, China has over the years adopted the use of various renewable energy sources including solar, wind, marine, as well as hydropower. This commitment by the Chinese government has yielded significant result over the years. Notably, between 2014 and 2015, wind and solar energies were responsible for 25.4% of electrical energy produced in China. However, enabling laws to support the optimum consumption of these energies has not been provided, thereby resulting in a serious setback. In spite of the increased production in renewable energies, biofuels have contributed only marginally to the entire growth. Biofuels are very important considering the contribution of the transport sector to carbon emissions. Although there are ethical issues associated with current biofuels due to energy-food nexus, this review submits that algal biofuel could serve as an alternative. To this end, there is urgent need for the government to put in place laws and policies that will support not only production but also consumption of renewables, including algal biofuel, so that dependence on coal and other fossil fuels can be further reduced. This will not only reduce the country's dependence on oil import which is currently at 59.4% but greatly reduce greenhouse gas (GHG) emissions.

147 citations

Journal ArticleDOI
TL;DR: It was observed that most nanoparticles were mechanistically irreversibly adsorbed on the surface of quartz sample, and this wettability shift thus may increase CO2 storage capacities and containment security.

97 citations

Journal ArticleDOI
Bin Yang1, Yili Kang1, Lijun You1, Xiangchen Li1, Qiang Chen1 
01 Oct 2016-Fuel
TL;DR: In this paper, a pressure decay method was used to measure the surface diffusion coefficient of adsorbed gas (methane) with shale core plugs under in-situ conditions.

72 citations