Seismic Expression of the Boundaries of a Miocene Carbonate Platform, Sarawak, Malaysia
Guido L. Bracco Gartner, Wolfgang Schlager, Erwin W. Adams, 2004. "Seismic Expression of the Boundaries of a Miocene Carbonate Platform, Sarawak, Malaysia", Seismic Imaging of Carbonate Reservoirs and Systems, Gregor P. Eberli, Jose Luis Masaferro, J. F. “Rick” Sarg
Download citation file:
The origin of seismic reflections in slope deposits of a Miocene carbonate platform, offshore Sarawak, was studied using cores, well-log data, and two-dimensional seismic. This isolated carbonate platform has slope angles ranging from 2 to 25°. Our interpretation of the seismic data is that the asymmetric and high-rising platform (250–300 m relief) has different stratigraphic character for the southern and northern flanks. The southern slope was characterized by bypass or erosion throughout the aggrading phase of platform development. It was subsequently buried by shale with downbending, onlapping beds that indicate terrigenous sediment transport from the south. An alternative is folding during tectonic deformation. On the northern flank, the shale already started to pile up during platform aggradation. Phases of erosional or bypass conditions were short and alternated with two phases formed when platform debris interfingered with surrounding shale. Shale intercalations can be recognized seismically by negative reflections that quickly lose amplitude away from the platform. Although the overall shape of the platform is probably related to an older structural pattern of the Luconia Province, the asymmetry of the platform architecture and the distribution of sediments are most likely the results of paleowinds.
Figures & Tables
Recent advances in seismic acquisition, processing and visualization techniques image carbonate strata with unprecedented resolution. This volume documents the current state of the art in seismic imaging and interpreting of carbonate systems and captures the dynamics of the carbonate system on a large exploration scale and on a small reservoir scale. The book emphasizes the newest approaches in seismic visualization, seismic sedimentology and stratigraphy, seismic attribute analysis and their application for building improved 3-D reservoir models. Among the topics covered are the delineation of the complex histories of carbonate platform sequences from seismic data, the relationships between geometries and forming processes, the imaging of faults for improved mapping of potential fluid migration pathways, and use of seismic attributes for the extraction of rock properties in the sedimentary bodies. The book illustrates the power of integrating seismic and geological data to better predict of the architecture and heterogeneities in carbonate depositional systems. As such the book will be a useful reference for both geologists and geophysicists.