--> --> Advances in Seismic Stratigraphy of Carbonate Platforms and the Importance of Integrated Interpretation Using Time- / Depth-slice and Well Calibration Data
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Advances in Previous HitSeismicNext Hit Stratigraphy of Carbonate Platforms and the Importance of Integrated Interpretation Using Time- / Depth-slice and Well Calibration Data

Abstract

Advances in Previous HitseismicNext Hit and sequence stratigraphy of carbonate platforms have been led by a series of step changes in understanding based on Previous HitseismicNext Hit recognition of geometries, classification of geometries, calibration of Previous HitseismicNext Hit geometries with outcrop data, and the development of 3D Previous HitseismicNext Hit data (Previous HitseismicNext Hit geomorphology). Previous HitSeismicNext Hit stratigraphy has provided practitioners with a geometric framework to understand the distribution of carbonate facies and diagenetic products. This has allowed an evolution in conceptual thought from a “carbonate facies mosaic” to a more predictive chronostratigraphic framework that can be used to populate facies and rock properties in the subsurface. 3D Previous HitseismicNext Hit data from several regions show the utility of using time- and depth-slice (plan view) interpretations in concert with cross-section views. Recognition of features in plan view allows direct correlation of Previous HitseismicNext Hit features with depositional concepts (Previous HitseismicNext Hit geomorphology). Some features such as clinoforms or patchreefs can be mapped in plan view, but may not be consistently mapped in Previous HitseismicNext Hit cross section due to resolution or imaging constraints. Mapping of steep-sided carbonate slopes (shelves or isolated platforms) can be aided by plan view interpretation to recognize major failure surfaces, lobate geometries, and channelized deposits. Karst features can be mapped and correlated to well productivity. The overall evolution and growth of carbonate platforms can also be viewed in plan view. When viewed as successive “shallower” images, the growth can be illustrated through geologic time. Interpretation of some of these features may require significant manual picking (due to poor reflector quality). Calibration of Previous HitseismicNext Hit geometries with seismically-tied well data (including image logs and core) allows the interpretation of the geologic and reservoir significance of Previous HitseismicNext Hit geometries. The geometries and resulting Previous HitseismicTop facies can then be used to populate reservoir properties between wells and especially in areas of sparse well data.