This paper proposes a new fracture half-length and slippage factor determination method for fractured wells in tight gas reservoirs. The tight gas reservoir is mainly developed with hydraulic fracturing. The traditional fracture half-length determination method based on production data analysis may lead to error in some tight gas wells due to ignoring the pressure-dependent gas properties and the existence of gas slippage. Besides, quick and accurate determination of slippage factor is also a problem that remains to be solved. To fulfill this target, relevant equations are modified based on linear flow analysis by introducing new pseudoparameters so as to take the pressure-dependent properties and slippage flow into consideration. By combining the idea of iteration, a new procedure used to evaluate the fracturing efficiency as well as determine the slippage factor is proposed and validated by both synthetic and filed examples. The validation procedure shows that this method is convenient and accurate in fracture efficiency evaluation. Therefore, this method could provide reference for dynamic retrieval of tight sandstone gas reservoir struggling with slippage phenomenon.

tight gas reservoir  /  production data analysis  /  linear flow analysis  /  slippage  /  fracture half-length