APPLICATION OF ADVANCED DEPTH IMAGING TECHNOLOGY IN SHALLOW WATER OFFSHORE INDONESIA

摘要

This case study demonstrates the superiority of advanced depth imaging over time imaging. An advanced imaging program was designed and implemented over a small offshore 3D seismic dataset with the primary aim of improving the imaging beneath an area of high amplitude related to a probable gas accumulation. A significant improvement in imaging of the critical zone of interest was achieved through a process of iterative reflection tomography and anisotropic depth migration. Additionally, improvements in structural fidelity of fault planes and steep dips on the flank of a prominent shale diapir were realized. The processing flow consists of multiple iterations of Kirchhoff depth migration and unconstrained grid based tomography. Comparisons between time domain imaging and anisotropic depth imaging are given to demonstrate that depth imaging is the preferred seismic imaging tool in areas of structural and seismic velocity model complexity.