HWK 7 solution - Production Engineering PGE 362 Homework 7...

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Production Engineering PGE 362 Homework 7 (1) (7 pts) A gas well has the following bottom hole pressure build up test. Plot the build up test and using the following production data compute – (a) kh (md-ft) (b) k (md) (c) s (d) pressure drop due to skin (psi) (e) actual productivity index (f) ideal productivity index (g) flow efficiency Production Data and Build Up Data: BHP (psia) dt (hrs) 2422 0 2455 0.032 2485 0.046 2540 0.075 2655 0.15 2720 0.23 2750 0.308 2785 0.442 2798 0.598 2811 0.924 2818 1.783 2820 2.674 2828 5.348 2832 8.914 2833 14.518 2835 18.48 2837 25.41 2841 31.77 The well is flowing at time = 0 hours. Flow Time prior to the test = 50,800 hours Stable Flow Rate prior to the test = 3,012 MScf/Day Average gas viscosity = 0.0201 cp Gas Formation Volume Factor = 0.00563 cuft/Scf Average z Factor = 0.87 Total compressibility = 0.000254 1/psi Porosity = 0.16 Well Diameter = 7”
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Gas Well BHP Build Up Test 2400 2420 2440 2460 2480 2500 2520 2540 2560 2580 2600 2620 2640 2660 2680
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HWK 7 solution - Production Engineering PGE 362 Homework 7...

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