PGE 421K Spring 2010 HWSolution8

PGE 421K Spring 2010 HWSolution8 - PGE 421K, Spring 2010...

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Unformatted text preview: PGE 421K, Spring 2010 HOMEWORK 8 Solutions 1) A thick limestone reservoir has been cored and the drainage curve (measured with reservoir oil and synthetic brine) on a plug taken near the bottom of the reservoir is shown below: The oil density is 48.5 lbm/ft 3 , and brine in the reservoir has density 63.3 lbm/ft 3 . Plot the water saturation in the reservoir as a function of height above the oil-water contact. g G = g g = In oilfield units: g G = 144 Solving for : = 144g G 2 4 6 8 10 12 0.2 0.4 0.6 0.8 1 Pc (psi) Sw Sw Pc(psia) h (ft) 1 0 0.00 1 1.8 17.51 0.95 1.85 18.00 0.9 1.9 18.49 0.5 2.2 21.41 0.4 2.5 24.32 0.3 3 29.19 0.25 3.5 34.05 0.21 8 77.84 0.21 10 97.30 0.00 20.00 40.00 60.00 80.00 100.00 120.00 0.2 0.4 0.6 0.8 1 Sw height above OWC (ft) 2) A reservoir dips at an angle of 15 degrees. Closure at the updip end is by means of a sealing fault. The capillary entry pressure for the fault rock is estimated to be 125 psia. What is the maximum possible extent of the reservoir in the downdip direction, i.e. what is L downdip in the sketch? g G = g G, + In oilfield units: g G = g G, + 144 Assume = 63.3 , = 48.5 Using the OWC as the reference point (z=0) Pc (z = 0) = 0, solve for h: = 144g G = 144125 63.3 48.5 = 1216 Solve for : = sin = sin = 1216 sin15 = 4698 h 3)...
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This note was uploaded on 02/13/2012 for the course PGE 421K taught by Professor Bryant during the Spring '11 term at University of Texas at Austin.

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PGE 421K Spring 2010 HWSolution8 - PGE 421K, Spring 2010...

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