New concepts for borehole and VSP data integration in seismic data processing

摘要

The Berkine basin, Algeria presents unique challenges for seismic data acquisition, processing, and interpretation. This is primarily due to surface and shallow subsurface conditions, namely, the presence of up to 2 km wide and up to 250 m high star-shaped dunes, unconsol-idated sands in the shallow subsurface, and several high-density/velocity layers within 500 m below the surface causing severe statics and multiple problems. The seismic data processing was therefore faced with several challenges, in terms of statics, noise (random, linear, multiples and acquisition footprint), and also velocity analysis. These all had a detrimental effect on the integrity of the structural and strati-graphic interpretation of the 2D and 3D seismic data. New ways of integrating borehole data to obtain a better understanding of these problems and possible solutions were considered, and are presented in this article.