Theflow behavior of shale gas horizontal wells is relatively complex,and this should be regarded as the main reason for which conventional pipeflow models are not suitable to describe the related dynamics.In this stud...Theflow behavior of shale gas horizontal wells is relatively complex,and this should be regarded as the main reason for which conventional pipeflow models are not suitable to describe the related dynamics.In this study,numerical simulations have been conducted to determine the gas-liquid distribution in these wells.In particular,using the measuredflow pressure data related to 97 groups of shale gas wells as a basis,9 distinct pipeflow models have been assessed,and the models displaying a high calculation accuracy for different water-gas ratio(WGR)ranges have been identified.The results show that:(1)The variation law of WGR in gas well satisfies a power function relation.(2)The well structure is the main factor affecting the gas-liquid distribution in the wellbore.(3)The Beggs&Brill,Hagedorn&Brown and Gray models exhibit a high calculation accuracy.展开更多
Experiments were conducted to determine the steady-flow characteristics of a variety of top-entry junctions. The observed steady flow relationships are then incorporated into the finite difference of characteristics t...Experiments were conducted to determine the steady-flow characteristics of a variety of top-entry junctions. The observed steady flow relationships are then incorporated into the finite difference of characteristics to simulate the unsteady flow behavior at pipe junctions. Tests under unsteady flow conditions were further carried out and it was consequently clarified that numerical model is capable of accurately predicting flow characteristics in realistic drainage networks.展开更多
基金supported by the company’s scientific research project“Study on Prediction Method of Liquid Carrying Capacity of Shale Gas Well with High Liquid-Gas Ratio”(Project No.20220303-05).
文摘Theflow behavior of shale gas horizontal wells is relatively complex,and this should be regarded as the main reason for which conventional pipeflow models are not suitable to describe the related dynamics.In this study,numerical simulations have been conducted to determine the gas-liquid distribution in these wells.In particular,using the measuredflow pressure data related to 97 groups of shale gas wells as a basis,9 distinct pipeflow models have been assessed,and the models displaying a high calculation accuracy for different water-gas ratio(WGR)ranges have been identified.The results show that:(1)The variation law of WGR in gas well satisfies a power function relation.(2)The well structure is the main factor affecting the gas-liquid distribution in the wellbore.(3)The Beggs&Brill,Hagedorn&Brown and Gray models exhibit a high calculation accuracy.
文摘Experiments were conducted to determine the steady-flow characteristics of a variety of top-entry junctions. The observed steady flow relationships are then incorporated into the finite difference of characteristics to simulate the unsteady flow behavior at pipe junctions. Tests under unsteady flow conditions were further carried out and it was consequently clarified that numerical model is capable of accurately predicting flow characteristics in realistic drainage networks.
