Case Study 1 - Solutions

To determine the best choice i will look at the

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Unformatted text preview: etermined previously in the report): Average difference in pressure Period Shape 1 Shape 2 Shape 3 Shape 4 IAR (1-4hrs) 4.5 6.9 1.5 8.8 Transiton (4-30 hrs) 13.2 17.7 4.0 3.1 SSS (30-60 hrs) 5.6 9.9 6.8 -15.7 Entire duration (1-60 hrs) 7.8 11.5 4.1 9.2 From the data shape 3, 2:1 rectangle with well off centre in long direction, has the lowest overall difference in pressure from the measured values. More importantly, it has the lowest error during the transition and semi-steady state periods. The MBH plots are much easier to read in these regions and are therefore more accurate that the infinitely acting reservoir region (in which equations are suitable). A final plot of the chosen configuration and measured data is shown below, highlighting the excellent overlay: 5 Final Overlay 2950 2900 2850 Pw (psi) 2800 2750 2700 2650 2600 2550 2 500 0.000 0.100 0.200 0.300 0.400 0.500 0.600 0.700 TDa 2:1 rectangle with well off centre in long direction 6 Measured 0.800 0.900 1.000...
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