Integrative Interpretation of 3D VSP and Multisource Salt Proximity at Vinton Dome, Louisiana, USA

Abstract

Abstract This paper presents 3D VSP imaging results of a salt-sediment boundary in the Vinton Dome Field, Louisiana, USA, using both borehole seismic reflection and refraction methods. The SS salt reflections were migrated to generate the salt-sediment boundary image volume and the PP sediment reflected waves were used to produce the depth migration image volume for the complex sediment structures. Multisource 3D salt proximity surveys result in 3D salt exit points which delineate the steep salt-sediment boundary with a significant overhang. 3D VSP Images from two methods are consistence, providing a greater degree of confidence in the interpretation of the complex 3D salt-sediment structures. A 3D visualization tool especially designed for 3D VSP solutions was used to integrative interpret multi-volumes of 3D VSP images, salt exit points, velocity models, well logs, surface seismic data, and other available data. The use of multifarious VSP imaging techniques and 3D visual tool provides validation of the various results and yields an accurate picture of the salt flank position.