file:pressure-transient-testing_fig2.png|{{figure number|2}}(a) Derivative type curve used to match derivatives of test data. (b) Shapes of derivatives of test data for various reservoir conditions. | file:pressure-transient-testing_fig2.png|{{figure number|2}}(a) Derivative type curve used to match derivatives of test data. (b) Shapes of derivatives of test data for various reservoir conditions. |