Mechanism of the Gas-Liquid Two-Phase Chaotic Flow in Single Fracture

被引：2
|
作者：
Yang, Dong [1 ,2 ]
Kang, Zhiqin [1 ,2 ]
Zhao, Yangsheng [1 ,2 ]
机构：
[1] Taiyuan Univ Technol, Minist Educ, Key Lab In Situ Property Improving Min, Taiyuan 030024, Peoples R China
[2] In Situ Steam Inject Branch State Ctr Res & Dev O, Taiyuan 030024, Peoples R China
来源：
GEOFLUIDS | 2020年 / 2020卷
基金：
国家重点研发计划;
关键词：
HELE-SHAW CELL; RELATIVE PERMEABILITY; VOID FRACTION; PRESSURE; MICROCHANNELS; REGIMES;
D O I：
10.1155/2020/8860058
中图分类号：
P3 [地球物理学]; P59 [地球化学];
学科分类号：
0708 ; 070902 ;
摘要：
The seepage of gas-liquid two-phase flow in fracture is a commonly found phenomenon in nature. To reveal the underlying mechanism and the critical condition of the chaos occurrence, a stochastic gas-liquid two-phase flow seepage model is established, and then investigated through a numerical simulation and a horizontal Hele-Shaw experiment. The numerical simulation and laboratory experiment results show that the seepage chaos of gas-liquid two-phase flow takes place when the relative saturation is in the range of gas relative saturation 44%-70%, and the occurrence probability can be expressed in polynomials. The chaos probability exceeds 80% when the relative saturation of gas is 47%-65%, and the chaos probability is 100% when the relative gas saturation is 57%-60%. It is found that the stochastic variation of gas connection cluster and the compressibility of gas lead to a remarkable change of pressure gradient of the gas-liquid flow both in magnitude and direction. Therefore, the turbulent flow is formed, the kinetic energy of fluid transport decreases gradually, and the flow is stopped at last.
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页数：11
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