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tight gas production model considering TPG as a function of pore pressure,permeability and water saturation

Petroleum Science 2020年第5期17卷 1356-1369页

作者： Atif Zafar Yu-Liang Su Lei Li Jin-Gang Fu Asif Mehmood Wei-Ping Ouyang Mian Zhang School of Petroleum Engineering China University of Petroleum(East China)Qingdao 266580ShandongChina Department of Petroleum Technology University of KarachiUniversity RoadKarachi 75270Pakistan Changqing Downhole Technology Company Chuangqing Drilling Engineering Co.LtdCNPCXi’an 710018ShaanxiChina

Threshold pressure gradient has great importance in efficient tight gas field development as well as for research and laboratory *** experimental study is carried out to investigate the threshold pressure gradient in *** are carried out with and without back pressure so that the effect of pore pressure on threshold pressure gradient may be *** trend of increasing or decreasing the threshold pressure gradient is totally opposite in the cases of considering and not considering the pore *** results demonstrate that the pore pressure of tight gas reservoirs has great influence on threshold pressure *** effects of other parameters like permeability and water saturation,in the presence of pore pressure,on threshold pressure gradient are also examined which show that the threshold pressure gradient increases with either a decrease in permeability or an increase in water *** new correlations of threshold pressure gradient on the basis of pore pressure and permeability,and pore pressure and water saturation,are also *** on these equations,new models for tight gas production are *** gas slip correction factor is also considered during derivation of this proposed tight gas production *** performance relationship curves based on these proposed models show that production rates and absolute open flow potential are always be overestimated while ignoring the threshold pressure gradients.

关键词： Inflow performance relationship Pore pressure Threshold pressure gradient tight gas field development tight gas sand reservoir

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