--> Abstract: Integrated Model for the Western Barents Sea, by Laura Marello; #90177 (2013)

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Integrated Model for the Western Barents Sea

Laura Marello

The western Barents Sea, while a promising petroleum resource area, is also a complex geological region as a result of a multiphase evolution. As such, geohistory reconstruction and consequent basin modelling represent a significant challenge. To bring new light on the understanding of the western Barents Sea setting and evolution and its petroleum system, Exploro develop a new regional model. The model builds upon a regional stratigraphic framework and seismic interpretation study produced in 2012 which has been regionally extended and updated. Cenozoic and Mesozoic horizons have been interpreted and depth-converted using all publicly available seismic data (2D and 3D), well data and seismic stacking velocities. New biostratigraphy has also been included to improve the resolution of well tops and to provide a better constrain for the Mesozoic stratigraphy. Lithofacies descriptions for the various interpreted units are provided based on interpretation in wells. Four independent methods for estimating erosion have been used and integrated to establish a consolidated multiphase erosion model. Sonic and density logs and vitrinite reflectance have been analysed in wells and combined with interval velocities obtained from seismic data. Integrated seismic/gravity/magnetic approach has proved to be efficient to face the problem of sub-salt and sub-basalt imaging (e.g. Gernigon et al. 2011) and has been applied in this work to define the existence of possible Palaeozoic sediments and salt structures. Top basement and basement units have also been defined based on Marello et al 2012, combining seismic interpretation with gravity and magnetic modelling. This provides valuable input for basin modelling which has been developed in this work including thermal model, maturation and expulsion modelling for multiple source rocks. The resulting model provide a new understanding of the western Barents Sea setting and the results provide a good framework for further study and petroleum system analysis.

AAPG Search and Discovery Article #90177©3P Arctic, Polar Petroleum Potential Conference & Exhibition, Stavanger, Norway, October 15-18, 2013