【摘要】 针对P-M模型易产生集块效应,边缘保持效果不理想,无法滤除边缘噪声,且P-M方程是病态的等缺点,本文提出了基于复数域非线性各向异性扩散滤波的储层裂缝检测方法。该方法通过将传统各向异性扩散方程拓展到复数域,将复数域扩散项加入Shock滤波器,克服了扩散滤波边缘保持能力差和Shock滤波器对噪声敏感的缺点,在压制噪声的同时保持了地震资料同相轴的边缘信息,从而增强了地震同相轴的横向连续性,使断点更加清晰。理论和实际资料试算结果表明,本文提出的基于复数域非线性各向异性扩散滤波方法具有较强的噪声压制能力,能够精确检测储层裂缝发育带分布特征。更多还原

【Abstract】 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.更多还原