Results 11 to 20 of about 109,385 (246)
Determination and application of a reasonable drainage rate of coalbed methane in vertical wells in the single-phase flow stage [PDF]
E3S Web of Conferences, 2021 The determination of a reasonable drainage rate of coalbed methane (CBM) in vertical wells in the single-phase flow stage can provide maximise the transmission of water pressure over distance. Based on the principle of effective stress and Darcy’s law, a
Yang Sen +4 more
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Energies, 2020 It is commonly believed that matrix and natural fractures randomly distribute in carbonate gas reservoirs. In order to increase the effective connected area to the storage space as much as possible, highly deviated wells are widely used for development ...
Qinwen Zhang +3 more
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Meitan xuebao, 2023 The threshold pressure gradient (TPG) of gas-liquid seepage in tight sandstone varies with the rock effective stress, that is, the dynamic threshold pressure gradient effect, its dynamic variation characteristics are controlled by the pore-throat ...
Qian WANG, Jian SHEN, Yue ZHAO, Qiang XU
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Pressure Transient Analysis of the Low Permeability Composite Reservoir with Threshold Pressure Gradient [PDF]
2010 Asia-Pacific Power and Energy Engineering Conference, 2010 A mathematical model of effective radius for low velocity non-Darcy flow in low permeability composite reservoir with two different zones is established and the threshold pressure gradients of the two zones in low permeability composite reservoir are taken into consideration.
Sun, Qing-You +3 more
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Development characteristics of low oil saturation reservoirs
Petroleum Exploration and Development, 2011 The filtration characteristics of low oil saturation reservoirs are obviously different from that of conventional reservoirs. The development performance and the influence factors for low oil saturation reservoirs were studied using laboratory large ...
Liu Bolin, Wang Youqi
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Frontiers in Energy Research, 2022 A tight reservoir can only have industrial production value after fracturing. After volume fracturing, there are artificial fracturing zones and fracturing unmodified zones composed of a matrix, microfractures, and main fractures. There are also pressure-
Daiyin Yin +3 more
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Further understanding on fluid flow through multi-porous media in low-permeability reservoirs
Petroleum Exploration and Development, 2012 This paper studies typical nonlinear models of fluid flow through multi-porous media in low-permeability reservoirs, analyzes hypothesis conditions, derivation process and the experimental data rationality, and clarifies some confusions in order to ...
Hongen DOU, Yang YANG
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Influence of ultra-low interfacial tension system on nonlinear seepage law of low permeability core
地质科技通报, 2021 The starting pressure gradient in low permeability reservoir leads to the nonlinear characteristics of fluid flow, which makes the development mode of low permeability reservoir different from that of medium and high permeability reservoir.In order to ...
Yujia Zeng +4 more
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Numerical Simulation Study on Waterflooding Heavy Oil Based on Variable Threshold Pressure Gradient
Geofluids, 2021 The heavy-oil flow in porous media is characterized by non-Darcy law with variable threshold pressure gradient (TPG) due to the large fluid viscosity.
Fan Liu +5 more
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Advances in Civil Engineering, 2018 The existence of the threshold hydraulic gradient in clays under a low hydraulic gradient has been recognized by many studies. Meanwhile, most nature clays to some extent exist in an overconsolidated state more or less.
Chuanxun Li +3 more
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