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The AAPG/Datapages Combined Publications Database

Indonesian Petroleum Association

Abstract


27th Annual Convention Proceedings, 2000
Pages 1-24

An Interpreter's Guide to Improvements in Previous HitDepthNext Hit Imaging Through Model-Based Previous HitVelocityNext Hit Estimation and Refinement

Andy Furniss

Abstract

The advent of Previous HitvelocityNext Hit-sensitive Previous HitdepthNext Hit imaging techniques such as pre-stack Previous HitdepthNext Hit migration has created a demand for more accuracy in Previous HitvelocityNext Hit model building. Traditional methods that use seismic processing velocities are limited by the many assumptions inherent in the Dix formula and the distortion caused by complex ray paths. Techniques based on model ray-tracing allow more accurate estimates of interval Previous HitvelocityNext Hit to be made, which, when constrained by an interpreter's geological knowledge of an area, have the ability to produce superior Previous HitvelocityNext Hit models for Previous HitdepthNext Hit conversion or prestack Previous HitdepthNext Hit migration.

The role of the interpreter in any Previous HitdepthNext Hit imaging project is often understated because of a lack of understanding of Previous HitvelocityNext Hit modelling and Previous HitdepthNext Hit imaging techniques. The purpose of this paper is to introduce some of these concepts to interpreters in an attempt to promote more active involvement in Previous HitvelocityNext Hit modelling projects and for them to not simply rely on the processing experts to build geologically consistent Previous HitvelocityNext Hit models.

Previous HitVelocityNext Hit estimation techniques such as stacking Previous HitvelocityNext Hit inversion and coherency inversion are equally applicable to Previous HitdepthNext Hit conversion projects as they are to pre-stack Previous HitdepthNext Hit migration. Coupled with map migration techniques, these methods allow the interpreter to reduce the uncertainty of conventional Previous HitdepthNext Hit conversion and ultimately reduce the geological risk of prospects.

Pre-stack Previous HitdepthNext Hit migration and tomographic model refinements are an essential and powerful tool to produce the optimum seismic data quality. These methods are described to give the explorationist a practical understanding of the workflows involved in Previous HitdepthTop imaging.


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