RT Journal Article ID 6bcb83b973912664 A1 Jin, Y. A1 Chen, K. P. A1 Chen, M. A1 Grapsas, N. T1 GAS EXPANSION-INDUCED ACCELERATION EFFECT IN HIGH-PRESSURE GAS FLOWS NEAR A WELLBORE JF Journal of Porous Media JO JPM YR 2012 FD 2012-03-30 VO 15 IS 4 SP 317 OP 328 K1 porous media K1 compressible flow K1 near-wellbore flow K1 large pressure gradient AB In a high-pressure gas well, gas acceleration increases continuously as the gas moves and expands toward the wellbore. This expansion-induced acceleration effect in the linear flow of a high-pressure gas near a wellbore is studied. It is shown that for a given bottomhole flowing pressure, gas acceleration reduces mass flow rate, and for a given mass flow rate, gas acceleration decreases bottomhole flowing pressure. Acceleration steepens the pressure profile near the wellbore. When the bottomhole flowing pressure is decreased to a critical value, the gas mass flow rate reaches a maximum and the flow becomes choked. At choking condition, the gas pressure curve forms a vertical tangent at the wellbore wall and creates an unbounded pressure gradient. A further decrease in the bottomhole flowing pressure induces expansion shocks at the wellbore wall.. PB Begell House LK https://www.dl.begellhouse.com/journals/49dcde6d4c0809db,3083834126e17635,6bcb83b973912664.html