6781096952
22.
A platform is producing surplus gas that must be sold into a nearby pipeline; flaring is not
permitted. The gas has the following characteristics:
gas gravity = 0.689 SG (Air = 1)
ratio of specific heats = 1.206
molecular weight = 20
supercompressibility factor = 0.022
Wells on the platform produce a total of 18 mmcfd (509,703 m3/d) dry gas (after separation and dehydration). Platform fuel use is 6 mmcfd (169,900 mVd). The gas is cooled after leaving the dehydrator to a temperaturę of 60°F (15.6°C). Pressure at the gas cooler outlet is 227 psig (1,565 KPa). Pipeline pressure is 1,050 psig (7239 KPa).
What minimum horsepower, hp, would be reąuired to compress the surplus gas from this platform for sale into the pipeline?
A. 1,191
B. 1,238
C. 1,787
D. 2,649
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