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f High Resolution Stratigraphic Architecture of the Cretaceous Chalk of the Danish Central Graben
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 75th EAGE Conference & Exhibition - Workshops, Jun 2013, cp-349-00108
- ISBN: 978-90-73834-49-1
Abstract
The lithological composition of the Cretaceous Chalk of the North Sea Basin is homogenous and consists essentially of nannofossils (coccoliths and nannoconids), with only locally admixtures of clays and coarser bioclasts. Traditionally exploration strategy in these homogenous rocks was guided by acoustic impedance volumes that showed the location of high porosity units. With increased maturation of fields and the search for remaining hydrocarbon occurrences, it is now essential to better understand the high resolution stratigraphic architecture. We will show how high resolution three-dimensional geo-model interpretation of the seismic volume helped to document the change from a post-rift phase into a violent inversion phase and its impact on sediment distribution. This three-dimensional seismic approach allows for interpretation of previously poorly understood seismic features in the context of the geological evolution of the area, and helps to better understand the porosity distribution in the chalk.