Full text loading...
-
Vector-acoustic Kirchhoff Migration and its Mirror Extension - Theory and Examples
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 75th EAGE Conference & Exhibition incorporating SPE EUROPEC 2013, Jun 2013, cp-348-00649
- ISBN: 978-90-73834-48-4
Abstract
To make use of the additional measurements made by multimeasurement streamers, and to evaluate their impact on imaging, a vector-acoustic Kirchhoff migration was formulated and developed based on a research prototype code of the conventional Kirchhoff migration. After demonstrating the ability of our vector-acoustic migration to remove the receiver ghost in the migration domain, we extend the method to make use of the receiver ghosts by means of mirror migration. This extension does not require any extra effort such as joint deconvolution thanks to the information contained in the multimeasurement data. Furthermore, we consider the ghost and the additional measurement as supplementary energy to further improve the imaging results and the signal-to-noise ratio. The method is applied to two synthetic data sets: a simple layered model and a more realistic model inspired by the Gullfaks reservoir in the North Sea. We also added realistic noise to our synthetics and demonstrate how our migration algorithm deals with it.