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Unformatted text preview: PGE 421K, Spring 2010 HOMEWORK 2 70 points Due M 15 Feb 1) Scientific Method. For each statement below, a. indicate whether it is a testable hypothesis b. if a statement is not a testable hypothesis, rewrite it so that it becomes a testable hypothesis c. for each testable hypothesis, describe an experiment that would test the hypothesis. Your description must clearly state how the observed result of the experiment would be used to test the hypothesis A) If the cement squeeze stopped the casing leak and we open this valve, then the pressure will not change. Testable. Squeeze cement into the casing leak, open the valve, and observe the pressure. B) Reservoirs with larger porosity have larger permeability. Not testable. Rewrite: If reservoir A has larger porosity than reservoir B, then reservoir A will have larger permeability than reservoir B C) The last eight wells drilled in the Cotton Valley sand came on production at an average rate of 8 MMSCFD, so to make our production target we should plan on drilling 5 more wells this quarter. Not Testable. Rewrite: If we drill five more wells in the Cotton Valley, then we will meet our production target. D) If the formation fluids near the wellbore are in equilibrium, then there will be no condensate in the rock near the wellbore. Testable. Shut in the well and let the formation fluids come to equilibrium. Reopen the well and observe the new production for condensate. 20 pts 2) Mass and Component Balances. For the sour gas field described in Problem 3 of Homework 1, the operators are considering a novel means of disposing of the H 2 S/CO 2 mixture. The idea is to dissolve the gas in water in a tank at the surface, then inject the H 2 S/CO 2-saturated brine into a deep aquifer. The tank would operate at P = 1000 psia and T = 120 degrees F. At these operating conditions, the mole fractions of H 2 S and of CO 2 in the saturated brine are 0.005 and 0.005, respectively. Water is available on the lease at 52 the saturated brine are 0....
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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.
- Spring '11