About This Item

Share This Item

The AAPG/Datapages Combined Publications Database

Indonesian Petroleum Association

Abstract


26th Annual Convention Proceedings (Volume 1), 1998
Pages 350-350

Recent Experiences with Seismic Previous HitImagingNext Hit and Velocity Analysis: Abstract

John L. Toldi1, Nathaniel G. Tilander2

Abstract

This paper presents recent experiences within Chevron, of applying modern Previous HitimagingNext Hit technology to areas of moderate geologic complexity. In these areas, generally of extensional geology, the lateral velocity gradients are not so severe that conventional time Previous HitimagingNext Hit fails entirely. However, we find that those images are locally unclear and moderately distorted. By applying careful, horizon-oriented velocity analysis, anisotropic parameter estimation and iterative pre-and post-stack Previous HitdepthNext Hit migration, we are able to significantly improve the clarity and accuracy of these images.

In the examples presented here, the application of the Previous HitimagingNext Hit technology is intended to assist the ongoing field development. In this development environment, our Previous HitimagingNext Hit methods are able to take advantage of the nearby well control. On the other hand, the accuracy demands are high, and the remaining Previous HitimagingNext Hit questions are often very specific (e.g. trying to resolve the possible separation of beds along a minor fault). Thus, although no single effect (such as lateral velocity gradients or anisotropy) is large enough to have required complex-Previous HitimagingTop technologies in the earlier exploration phase, these technologies are now being regularly applied in the development phase.


 

Acknowledgments and Associated Footnotes

1 Chevron Overseas Petroleum

2 Chevron Petroleum Technology Company

Copyright © 2006 by the Indonesian Petroleum Association