%0 Journal Article
%A Jin, Y.
%A Chen, K. P.
%A Chen, M.
%A Grapsas, N.
%D 2012
%I Begell House
%K porous media, compressible flow, near-wellbore flow, large pressure gradient
%N 4
%P 317-328
%R 10.1615/JPorMedia.v15.i4.20
%T GAS EXPANSION-INDUCED ACCELERATION EFFECT IN HIGH-PRESSURE GAS FLOWS NEAR A WELLBORE
%U http://dl.begellhouse.com/journals/49dcde6d4c0809db,3083834126e17635,6bcb83b973912664.html
%V 15
%X 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..
%8 2012-03-30