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ABSTRACT

Sequence stratigraphic concepts have long been used to integrate core and well log data with 3D seismic data to establish predictive reservoir models. This paper documents a new technique to systematically evaluate large scale log patterns in order to identify key chronostratigraphic surfaces with confidence. Linked closely to 3D seismic structural and stratigraphic interpretations, this technique has been applied in several reservoir modelling studies in the Niger Delta. Special emphasis has been given to the influence of growth faults on reservoir development. The resulting tectonosedimentary framework has led to semi-quantitative predictions about sediment geometry and distribution which were subsequently utilized to constrain 3D models of the reservoirs. Such 3D models improve the quality and success of appraisal drilling as well as field development planning.

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