Note on calculation of PWRI well injectivity

Fig. 3. Pressure vs rate plot for data of Fig. 2. Fig. 4. Injectivity for data of Fig. 2 calculated by different methods. Fig.5. P vs Q plot showing straight line fit of fracture data and intercept at Q=0. Fig. 6. Calculation of II in fracture mode using Eqns. (7) and (10) compared to matrix calculation. ................
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