Test3Spring09 - 1 PGE 312 - SPRING 2009 Physical and...

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1 PGE 312 - SPRING 2009 Physical and Chemical Behavior of Petroleum Fluids I Test #3, 50 Minutes Closed Book Note: It will be in your best interest to attempt all the questions. Please budget your time accordingly. Problem 1 (30 points) A dry gas field owned by your company has the following properties and production history. Area = 850 acres Porosity = 13% Net pay thickness = 54 ft Initial water saturation = 0.52 Reservoir temperature e = 164 ºF Table 1. Gas Production History Cumulative Reservoir Gas Gas Time Pressure Z-Factor Production (years) (psia) (MMMscf) 0.0 1798 0.869 0.00 0.5 1680 0.870 0.96 1.0 1540 0.880 2.12 1.5 1428 0.890 3.21 2.0 1335 0.900 3.92 Note: MMMscf = scf 9 10
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a. Calculate the initial gas in place by volumetrics. Give your answer in standard cubic feet (scf). b. Plot an appropriate graph that can be used to determine the initial gas in place from the production history. Please use all the available data. A graph paper is provided for your convenience. c.
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This note was uploaded on 04/21/2010 for the course PGE 312 taught by Professor Peters during the Spring '08 term at University of Texas.

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Test3Spring09 - 1 PGE 312 - SPRING 2009 Physical and...

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