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VSP Measurements used as a Tool in Sub Salt Field Development
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 3rd EAGE Workshop on Borehole Geophysics, Apr 2015, cp-447-00026
- ISBN: 978-94-6282-144-6
Abstract
Many of the Rotliegend low permeability dry gas fields in the Southern Permian Basin in northern Germany are covered by salt dome structures that lead to imaging problems in subsalt reservoir between 4000 m to 5000 m depth. As compartmentalization is the key challenge in field development high resolution seismic is essential for well planning. Only a vintage 3D seismic from 1993/94 with limited quality exists. Acquisition of new 3D seismic is not possible due to permitting restrictions and public resistance. Therefore the focus is on the acquisition of 2D VSPs in every new drilled well. The VSP measurements give local insights. With a general structural understanding and production history in mind those local insights can be merged into the overall picture and generate immense value for the understanding of the field.