Sensitivity of Anisotropic Parameter Estimation from 4C Data - Modelling and Case Studies

F-18 SENSITIVITY OF ANISOTROPIC PARAMETER ESTIMATION FROM 4C DATA - MODELLING AND CASE STUDIES BÄRBEL TRAUB 1 2 and XIANG-YANG LI 1 Summary 1 The estimation of anisotropic parameter becomes increasingly important for 4C seismic data processing. To gain better insight into the accuracy and sensitivity of anisotropic parameters we undertake full-wave modelling and a case study using the 4C Alba data. After building the anisotropic model using the sonic logs and VSPs from the Alba field we vary the layer thickness and the near surface properties and estimate both the P- and PS converted-wave (C-wave) anisotropic parameters from full-wave