Spr05Test3_key - 1 PGE 312 - SPRING 2005 Physical and...

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1 PGE 312 - SPRING 2005 Physical and Chemical Behavior of Petroleum Fluids I Test #3 Solution Key Problem 1 ( 20 points ) A wet gas reservoir has been discovered with the following properties: Initial reservoir pressure = 8000 psia Reservoir temperature = 190 ºF Reservoir pay thickness = 200 ft Reservoir porosity = 25% Reservoir water saturation = 15% Gas Z factor at initial reservoir pressure = 1.0 Areal extent of the gas reservoir = 2500 acres Determine the initial gas in place in standard cubic ft. 43560 (1 ) w g Ah S G B φ = 3 0.02827 (0.02827)(1.0)(190 460) res cu ft 2.297 10 8000 scf g ZT Bx P + == = 12 3 43560 ) (43560)(2500)(200)(0.25)(1 0.15) 2.015 10 scf 2.297 10 w g Ah S Gx =
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2 Problem 2 (25 points) Your company has discovered an undersaturated black oil reservoir. Here are additional facts about the discovery. Initial reservoir pressure = 4000 psig Bubble point pressure = 3000 psig Reservoir temperature = 190 ºF Oil formation volume factor at bubble point = 1.25 RB/STB Solution gas oil ratio at bubble point = 700 scf/STB Gas formation volume factor at bubble point = 0.00460 res cu ft/scf
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Spr05Test3_key - 1 PGE 312 - SPRING 2005 Physical and...

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