A fractural detection method based on nonlinear complex anisotropic diffusion filtering

Due to the blocking effect of P-M diffusion, the edges are not properly preserved, noises at the edges are not well removed, and the diffusion equation ill-posedness exists. This paper introduces a new nonlinear complex anisotropic diffusion filtering (NCADF) for reservoir fractural detection. The method generalizes the anisotropic diffusion in the complex domain, and develops nonlinear complex processes by adding a complex diffusion term to the Shock equation. The method overcomes disadvantages of conventional diffusion and Shock filter. Achieved edge preserving and denoising, this method improves the seismic event continuity and lateral resolution, and obtains better accuracy of fracture detection. The theoretical calculations and practical applications indicate that the NCADF-based reservoir fractural detection method shows its strong noise-suppressed and accurate fractural distribution detection capability.