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 http://dl.begellhouse.com/journals/49dcde6d4c0809db,3083834126e17635,6bcb83b973912664.html