Stereotomography in triangulated models
Kai Yang, Wei-Dong Shao · 2016
Stereotomography is a very distinctive tomographic method. It is capable of estimating the reflector position, the local dip of reflector and the macro velocity simultaneously. The geological boundary information is always preferred to be incorporated into the model space for any a tomography method. Differing from the previous work to apply various regularization techniques to incorporate the blocky, geological boundary information into the stereotomography, we think extending the stereotomograph to the triangulated model will be the most straightforward way to achieve this. In this abstract, we firstly construct the 2D stereotomography (frechet) matrix for triangulated model in the 2D Cartesian coordinate. All the first-order derivatives of the data components with respect to the model components needed by stereotomography in triangulated model are derived based on the ray perturbation theory for interfaces. Then a sensitivity test is implemented to verify the correctness of the frechet derivatives. Also, a practical work-flow for stereotomography in triangulated model is proposed. Finally, we present a synthetic data example to demonstrate the correctness of the frechet derivatives and the applicability of the work-flow. It provides a solid foundation for its later real applications. Presentation Date: Wednesday, October 19, 2016 Start Time: 3:35:00 PM Location: 155 Presentation Type: ORAL