3-D seismic data were used to evaluate the reservoir in the Mulussa F formation in the Elward area and to discover new drillable locations by delineating the fluvial channel system and the features of its facies. Seismic attributes such as relative acoustic impedance, coherency volume and reflection strength were considered. The attribute maps revealed different types of channels such as braided, meandering and anastomosing channels. They also revealed fluvial features such as point bars, Ox-Bows and crevasse splays, which are considered potential points of hydrocarbon accumulation due to the abundance of sandy bodies. The map of relative acoustic impedance demonstrated that the sandstone beds have high impedance, whereas the shale beds have low impedance. In fact, well data indicated that the shaly beds were surrounded by sandy beds, and their thickness was in the range of 20-25 m within the Mulussa F formation. The coherency attribute showed some of the meandering tributary channels that were not seen on the relative acoustic impedance map. The abundance of fluvial channels in the Euphrates region indicates a large water discharge during the deposition of the Mulussa F formation because of the wet climate prevailing during the Upper Triassic.

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By generating fault maps, isochron maps, and applying restoration techniques to 3D seismic data acquired over the Elward area of Syria, we have built a suite of cross sections that represent the tectonic evolution of the area. Fault maps and time structure maps reveal structural deformation, whereas isochron maps define areas of fault-controlled depocenters. Seismic attributes delineate fluvial channels formed during the Late Triassic period. The main rift phase in the study area is the Upper Cretaceous (Coniacian). Our analysis explained the absence of the Judea and the upper part of the Rutbah Formations from the stratigraphic column of the Elward north field.