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Stereotomography in Triangulated Models
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 79th EAGE Conference and Exhibition 2017, Jun 2017, Volume 2017, p.1 - 5
Abstract
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 stereo-tomography, we think extending the stereo-tomography 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.