Gas slippage effect

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August undefined, 2024

WebAug 5, 2024 · The gas production with the gas slippage effect is higher than that with no effect. It means that the gas slippage effect is positively related to production. Because … WebMay 29, 2015 · In this paper, we find that with the decrease in the average pore pressure in the process of gas production, both the slippage effect and the stress sensitivity effect will gradually...

Analysis of nonlinear effects in fluid flows through porous media

WebMar 1, 2024 · The permeability of a coal mass, under reservoir conditions, can be greatly affected by the process of gas adsorption, pore pressure, slippage effect, and stress conditions (Meng et al., 2024 ). Therefore, a sound understanding of how these factors can influence coal permeability is key to the CBM production and gas disaster prevention. WebSimilar to previous experimental observations, the simulated gas slippage factor shows a non-monotonic increase trend with water saturation; it starts to decrease under high water saturation,... optical stores london on

An Experimental Study on the Slippage Effect of Gas Flow in

Permeability is measured in the laboratory by encasing a core plug of known length and diameter in an air-tight sleeve (the Hassler Sleeve). A fluid of known viscosity is injected into the core plug while mounted in a steel chamber. The samples are either full diameter core samples that are intervals of whole core cut, typically 6 inches long, or 1-in plugs drilled from the cores. The pressure drop across the sample and the flow rate are measured and permeability is calculated … WebSep 1, 2013 · The influence factors of gas slip effect include permeability, pore pressure, and water saturation. Gas slip effect would be prominent when the permeability is less than 0.1 × 10 −3 μm 2 and the pore … WebJun 15, 2015 · Klinkenberg effect The permeability of a sample to a gas varies with the molecular weight of the gas and the applied pressure, as a consequence of gas … portland businesses leaving city

Mathematical Simulation about Gas Transport in a Dual ... - Hindawi

http://www.oilfieldwiki.com/wiki/Klinkenberg_correction WebApr 13, 2024 · The lower the gas pressure, the smaller the gas density and the more pronounced the slippage effect. The slippage effect has a positive impact on rock … optical stores in san antonioWebAt low rates, air permeability will be higher than brine permeability. This is because gas does not adhere to the pore walls as liquid does, and the slippage of gases along the pore walls gives rise to an apparent dependence of permeability on pressure. This is called the Klinkenberg effect, and it is especially important in low-permeable rocks. portland businesses selling newspapers

"WebMar 11, 2024 · We used the pore network model to investigate the effect of the water phase on the gas slippage behavior at the pore scale for the first time. It emphasized the … " - Gas slippage effect

Gas slippage effect

Effect of Pore Structure on Slippage Effect in Unsaturated …

Web20 rows · Slippage effect on the development index is analyzed by changing the value of slippage factors. The existence of the slippage effect can help improve gas well productivity. As is shown in Fig. 7.195, under the same production pressure difference, … WebThe gas permeability of porous media increases with the increment of porosity, while it decreases with increased pore fractal dimension under fixed porosity. Furthermore, the gas slippage effect strengthens as the pore fractal dimension decreases.

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WebDec 1, 2005 · It is found that the gas permeability is larger than the absolute permeability of porous media due to the gas slippage effect. Furthermore, the rarefaction influence on the gas permeability... WebGas hydrates have great potential as future energy resources. Several productivity and stability analyses have been conducted for the Ulleung Basin, and the depressurization method is being considered for production. Under depressurization, ground settlement occurs near the wellbore and axial stress develops. For a safe production test, it is …

WebApr 13, 2024 · The obtained results show that (1) bituminous coal permeability underwent a negative logarithmic change with pore pressure (0.2–0.8 MPa) at different temperatures because of gas adsorption–expansion, gas slippage, and shear deformation. WebDec 18, 2024 · It is mainly because gas slippage effect is more highlighted under normal conditions, then the apparent permeability will become larger and the TPG will decrease (Thomas and Katz 1968; Li and Horne 2004). Low permeability cores have stronger slippage effect and thus the TPG of low permeability core differ more greatly under …

WebOct 1, 1956 · Rose performed experiments on gas relative permeabilities which indicated that the effect of gas slippage on the measured effective gas permeabilities at various … WebNov 28, 2013 · (1) Limit Pressure. There exists gas slip effect in gas flow through tight sandstone, and exerting a certain... (2) The Gas Slip Effect Is Negligible. When the …

WebDec 1, 2005 · Under the influence of slippage effects, as the pore pressure increased, the measured permeability of the samples decreased and the slippage effect occurs in the …

WebJan 31, 2024 · The rigorous derivation of the new equation is presented with a semi-analytical approach in which the gas slippage effect and inertial forces are described. The latter effect is controlled by Fochheimer number, which is defined as a product of tortuosity and Reynolds number. portland business tax exemptionWebSep 28, 2024 · In conclusion, the new model which considers the real gas effect, diffusion effect and slippage effect, can accurately calculate the apparent permeability, which is a key issue in the production dynamic analysis and productivity prediction of … portland business journal wikipediaWebof gas molecules, the frequency of collision between gas molecules and solid walls 15 increases. Therefore this additional ﬂux due to the gas ﬂow at the wall surface, which is called “slip ﬂow”, becomes eﬀective to enhance the ﬂow rate. This phenomenon is called Klinkenberg eﬀect, and its eﬀect is expressed as follows, k g = k ... portland business leaving downtownWebJul 26, 2015 · The gas slippage effect in a porous medium, similar to an oil or gas reservoir, was first discovered in 1941 by Klinkenberg, who presented an equation establishing the correlation between the apparent (measured) gas permeability and the mean pressure when making the measurement (the pore pressure) on the one hand and … optical stores in tysons corner mallWebDec 1, 2024 · The Klinkenberg slippage effect is studied by the pore-scale molecular simulations using the DSBGK method and the permeability variation with pressure due to slippage is accurately obtained in a two-dimensional benchmark problem. optical stores near southaven msWebAug 5, 2024 · Threshold pressure gradient, gas slippage, and stress sensitivity have important effects on the production of a tight gas reservoir. But previous studies only focused on one or two of these effects. In this study, a mathematical model considering these three effects was established to describe gas transport in a dual-porosity tight gas … optical stores near me 07004 portland business journal the list