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Unformatted text preview: PGE 362 Acid Examples (1) A sample acid test has been performed using 15% HCl and a limestone core. The data is shown below. Please compute the core porosity after acid break through. Math must be shown for full credit. ( 29 2 2 1.27 cm = core diameter 7.62 cm = core length 0.09 original porosity fraction 2 ml = acid injected at live acid break through 1.27 7.62 0.09 0.868 ml 2 1.27 2 7.62 2 0.207 bt pore bt d L V V V φ π π φ φ = = = = = = = = = = (2) How much acid is required to perform the following 15% HCl acid job? Math must be shown for full credit. ( 29 ( 29 2 2 100' 3' 0.2' 0.1 1.5 7.48 3 0.2 100 0.1 1.5 3158 gal s w bt HF h r r PV V φ π = = = = = =- = (3) On the same graph, please plot the skin as a function of acid penetration radius from the well bore for HCL in a carbonate and HF in sandstone. Stop the graph when the acid reaches the damage radius. General equations must at least be shown for full credit....
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This note was uploaded on 02/13/2012 for the course PGE 362 taught by Professor Bommer during the Spring '08 term at University of Texas at Austin.
- Spring '08