distance between the point of flow variation (pressure pulse generating well) and point of pressure response (pressure pulse receiving well), being:
- well radius
for Self-Pulse Test
- distance between generating and receiving well
for Pressure Pulse Interference Test
p_1 = \frac{q_1}{\sigma} ... |
1st harmonic amplitude of pressure response to the flowrate variation
\delta_1 = \frac{\pi}{8} + \frac{L}{\sqrt{\chi \, T}} |
phase shift caused by pressure response delay to the flowrate variation
\sigma = \left< \frac{k}{\mu} \right> h |
formation transmissbility
\chi = \left< \frac{k}{\mu} \right> \frac{1}{c_t \, \phi} |
formation pressure diffusivity