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Measurement of Threshold Pressure Gradient of Microchannels by Static Method
Chinese Physics Letters, 2007The development of oil fields and laboratory experiment present the threshold pressure gradient (TPG) of liquid flow in low permeability porous media, which is called the micro-size effect in porous media. Some micro-size effects in micro-electro-mechanism systems (MEMS) are not always in agreement with each other.
Song Fu-Quan, Jiang Ren-Jie, Bian Shu-Li
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Dynamic threshold pressure gradient in tight gas reservoir
Journal of Natural Gas Science and Engineering, 2014Abstract Experimental approach was performed in this paper to study the threshold pressure gradient (TPG) in tight gas reservoir. The nonlinear flow behavior of tight gas reservoir was investigated at first, three zones of flow curve are divided to describe the nonlinear behavior of gas flow in tight formation: solid–gas viscous force zone, slippage ...
Jingchen Ding +3 more
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Application of RBF Algorithm in Prediction of Threshold Pressure Gradient
2009 International Conference on Computational Intelligence and Natural Computing, 2009It is well known that it plays an important role to determine threshold pressure gradient (TPG) in developing the low permeability oil field, and it directly influences the accuracy of reservoir pressure and developing amount. Threshold pressure gradient becomes nonlinear relation with such factors that may influence accuracy as permeability, viscosity
Changjun Zhu, Xiujuan Zhao, Weihua Yang
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Quantitative Characterization of Heavy Oil Threshold Pressure Gradient in Porous Media
SPE Reservoir Characterisation and Simulation Conference and Exhibition, 2023Abstract A large number of laboratory physical experiments and oilfield production practices show that the flow of heavy oil in porous media no longer follows Darcy's law, but needs to overcome a certain threshold pressure gradient (TPG), which determines the difficulty of heavy oil flow, directly affects the development effect of heavy ...
Xiankang Xin +4 more
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A Rate Decline Model of Composite Reservoir with Threshold Pressure Gradient
2021The existence of threshold pressure gradient makes the seepage mechanism in low permeability reservoir much more complex. In addition, many reservoirs have the properties of composite formation in actual production because of the drilling fluid intrusion, formation acidizing, fracturing or the characteristics of the reservoir itself.
Yu Huang, Gang Liu
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Effect of Asphaltene on Threshold Pressure Gradient of Heavy Oil in Porous Media
Science of Advanced Materials, 2021Many studies have shown that heavy oil with high asphaltene content has a yield stress. Coupled with the solid-liquid interaction between porous media and heavy oil, there is a threshold pressure gradient when heavy oil flows in porous media. Meanwhile, some previous research has indicated that the high viscosity of heavy oil is the decisive factor ...
Guishan Li +6 more
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Experiment and Mechanism Analysis on Threshold Pressure Gradient with Different Fluids
Nigeria Annual International Conference and Exhibition, 2010Abstract Fluids with different components were used in threshold pressure gradient (TPG) experiment by steady "pressure~velocity" method. Influence of Permeability and fluids components on TPG was analyzed. The study indicates different fluids give different TPG versus permeability power function, TPG of different fluids was as follows ...
Zeng Baoquan, Cheng Linsong, Hao fei
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Static Threshold Pressure Gradient Characteristics of Liquid Influenced by Boundary Wettability
Chinese Physics Letters, 2010We propose an experimental setup to measure the threshold pressure gradient (TPG) of microchannels with different wettability surfaces by the static method in microchannels with diameters from 20 μm to 320 μm, and compare the TPG of microchannels with adsorption of cetyl trimethyl ammonium bromide (CTAB) with that without CTAB adsorption.
Song Fu-Quan, Wang Jian-Dong, Liu Hai-Li
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Study on Threshold Pressure Gradient and Flow Law of Glutenite Reservoir with Low Permeability
Springer Series in Geomechanics and GeoengineeringJian Guan +4 more
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Special Topics & Reviews in Porous Media: An International Journal, 2014
This paper presents analytical solutions to the pressure transient equations of a uniform-flux hydraulically fractured gas well in low-permeability tight formation with threshold pressure gradient. A method to determine the location of the moving boundary front is also presented.
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This paper presents analytical solutions to the pressure transient equations of a uniform-flux hydraulically fractured gas well in low-permeability tight formation with threshold pressure gradient. A method to determine the location of the moving boundary front is also presented.
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