Double-square-root Equation Based Harmonic Wave Decomposition to Extract Angle Gathers and AVO Inversion

Accuracy of AVO inversion depended on the amplitude,prestack imgration could correct the amplitude distortion caused by nonhomogeneous strata,to improve the accuracy of AVO inversion with prestack migration was a new skill.The methods of true amplitude migration,angle gathers extraction and AVO inversion were studied based on double-square-root equation with the harmonic decomposition method to get a high-precision angle gathering through the model data and actual data to verify the feasibility of the method.