This paper discusses the results of the 3D Seismic Survey acquired in 1987 in the Idd el Shargi North Dome with the objectives of defining the detailed structural picture of the Shuaiba reservoir.
Initially pattern waterflood was the preferred development option as the field appeared simple and sparsely faulted based on old 2D seismic. 3D interpretation has shown two main fault systems, one of which had not been recognised before. The crest is intensively faulted whereas the flanks are either unfaulted, or have only one fault system. The crestal area will now be developed by gas/oil gravity drainage process. Other areas of the field are still under study.