This reference is for an abstract only. A full paper was not submitted for this conference.
In general it is difficult to map minor faults and other trace to trace discontinuities hidden in 3D seismic data which has direct bearing on proper reservoir description. Often these subtle faults and discontinuities appear as minor changes in seismic waveform which are not easily correlatable to map them by conventional interpretation techniques. To map these appropriate 3D seismic attributes sensitive to the existence of subtle faults and fractures has been investigated in the target reservoir, the Early Cretaceous (Albian) Mauddud Formation of Raudhatain Field of North Kuwait. Raudhatain field is one of the major fields of North Kuwait. It is a faulted anticlinal dome having two sets of faults and produces from reservoirs in Zubair, Burgan and Mauddud formations. Our main objective of the study was to gain better understanding of and to predict the possible fractures in Mauddud reservoir to improve the structural frame work for effective future planning of development and injector wells based on the findings. Major faults are easily identified at top and base of Mauddud due to large acoustic impedance contrast between Mauddud and clastic units of Wara and Burgan above and below. Smaller faults and possible fractures within Mauddud are difficult to map due to lack of vertical resolution and poor S/N ratio within the reservoir interval. To overcome this various 3D seismic attributes were computed and investigated. Horizon and volume based attributes (Dip & Azimuth, Curvature, Shaded relief, Spectral decomposition and coherency) were used integrating with sub-surface data to arrive at the best possible structural frame-work of the reservoir.