Difference between revisions of "Gilbert choke equation"
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==Brief== | ==Brief== | ||
| − | The most common formula used for multiphase flow through surface chokes by Gilbert <ref name=Gilbert | + | The most common formula used for multiphase flow through surface chokes by Gilbert <ref name=Gilbert/>. |
| − | Gilbert developed his empirical equation from field data in California. | + | Gilbert developed his empirical equation from field data in California<ref name=KermitBrown1984/>. |
==Math and Physics== | ==Math and Physics== | ||
Revision as of 19:00, 8 November 2024
Contents
Brief
The most common formula used for multiphase flow through surface chokes by Gilbert [1].
Gilbert developed his empirical equation from field data in California[2].
Math and Physics
Note that the equation is independent of the downstream pressure and assumes that the downstream pressure is less than 70% of the upstream pressure, i.e. the flow is "critical" and fluid reach sonic velocity in the throat of the choke.
Example
Given data
Oil rate = 600 bbl/d, GLR=400 scf/bbl, D=22/64 in, Line pressure = 180 psia
Calculate the well head pressure?
Solution
Validity check 180/460=0.4 < 0.7 OK
Nomenclature
= choke beam diametr, 64th of an inch
= gas liquid ratio, Mscf/bbl or 10^3 scf/bbl
= well head pressure, psig
= flow rate, bbl/d
References
