Capturing the effects of secondary fractures on production data using flow regime equations and specialised plots: An uncertainty analysis approach

The effect of secondary fracture networks on reservoir depletion can be investigated by applying QFM analysis equations on specialised rate-normalised pressure and pressure derivative production data plots. The choice of these plots is based on operational well constraints and observable flow regions. The QFM analysis equations are applied to interpret production data of two multifractured horizontal wells completed in the Cardium and Bakken Formations. The results estimate effective half-length of hydraulic fractures, investigate the presence/absence of secondary fractures and propose a workflow for handling the uncertainty in reservoir parameter estimation when applying the specialised analysis equations.