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The Triassic - Early Jurassic stratigraphy of the Arabian Plate is notably different to all underlying and overlying units. Several unique features include an often thick, very strongly vertically heterogeneous and often thin-bedded stratigraphy dominated by evaporites, restricted facies carbonates, and paralic siliciclastics. MFS are marked by open marine carbonates, and may be traced laterally across the plate. In general these record very low energy environments that are faunally impoverished; carbonates dominate intrabasinal and basin flank highs. Evaporites are concentrated in depocentres and are dominated by sulphates. Siliciclastics fringe the basin system. This is the least prospective of the post-Carboniferous units; sporadic carbonate reservoirs are usually thin, high-energy dolomitized oolites. Other reservoirs are thicker continental clastics. Source rocks have an evaporitic to locally lacustrine signature and yield generally light oils, but are mostly localised in depocentres where reservoir rocks are often lacking; whilst sealing evaporites are also often restricted to basinal areas whilst being absent on paleohighs. Future success within this stratigraphy will mainly depend upon our ability to predict the distribution and thicknesses of reservoir units within areas of reasonable burial depth; whilst the complex stratigraphy and regional thickness changes offer the possibility of locating stratigraphically trapped reserves.

Spatial Organization, Heterogeneity and Complexity of Triassic and Early Jurassic Deposystems of the Arabian Plate