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《Fault-Block Oil & Gas Field》 2006-06
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Characteristic Parameter Analysis of Low Velocity Non-Darcy Flow of Gas

Liu Xiaoxu(Research Institute of Exploration and Development,Southwest Oil and Gas Field Company,CNPC,Chengdu 610051,China),Hu Yong,Zhu Bin.  
As the proportion of low permeability gas reservoir in the explored gas reserves increases gradually,the development of low permeability gas reservoir attracts more attention.The confirmation of gas seepage characteristic parameter in low permeability gas reservoir is the groundwork for the development of low permeability gas reservoir,but we are still stay on the qualitative analysis stage and have not develop a set of characteristic parameter mathematical model which can describe the gas seepage law integrally in low permeability gas reservoir.The paper combined the theoretical analysis with the mathematical deduction,developed a set of characteristic parameter mathematical model which includes “slippage driving force”,“start-up pressure drawdown”,“general seeping velocity” and “critical pressure and critical pressure gradient”.The study in the paper can help us to realize further seepage law in the low permeability reservoir,confirm seepage mechanism,and also provide a theoretical foundation for the rational development of low permeability gas reservoir.
【CateGory Index】: TE312
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