Fracture Delineation in a Carbonate in the Case of Signal Distortion from Overlying Sediments

The use of DWM in the oilfield in the Timan-Pechora gas & oil province, present in the Lower Devonian carbonates, allowed us to obtain information about previously unknown zones of fracturing. Analysis of the DWM transformation procedure using different apertures has shown that these areas have various different systems of fractures, and their superposition leads to an increase in the absolute amplitudes of the DWM data cubes. These amplitude anomalies are closely correlated with the potential productivity of wells within this oilfield. Fracture azimuths delineated on the basis of DWM in the proximity of the wells are in good agreement with XMAC data and passive seismic data after fracking operations were conducted.