A Consistent Workflow From Seismic Acquisition to Well Positioning—For Challenging Data in Block 11, Offshore Qatar

摘要

This paper describes the seismic workflow for exploration in Block 11, offshore Qatar, from the decision to acquire a 3D seismic survey, via processing, interpretation, time/depth conversion and reservoir characterization to positioning of wells. The area is generally very flat in the morphology of the horizons and the targets are relatively shallow, therefore, the decision for acquiring 3D seismic data had been taken rather late. It turned out to be a textbook example why 3D seismic is imperative even in such generally flat areas. The structural history of the area, from the old basement lineaments up to the earliest Cretaceous-Tertiary aged reactivation movements, could be outlined by 3D seismic data and it shows a very complex structural pattern.