Seismic stratigraphy analysis and mapping shallow channel geometry by using seismic attributes analysis

In this study, multi-attributes and advanced attributes were applied and compared with the results. The advanced attribute includes the structural smoothing attribute was used as input to generate a variance attribute to increase the signal-to-noise ratio and obtain better results to enhance the appearance of channel geometry. The seismic attribute analysis of 3D seismic data demonstrates the stratigraphic analysis of channel geometry elements in the channel fluvial system of the Oligocene Upper Frio Formation in Stratton Field, southern Texas. Different channel geometry elements were recognized, which include sinuosity, channel incision shape, channel width, point-bar width, point-bar length, meander-belt width, meander length, and channel length. Two-channel styles that are recognized within the Upper Frio Formation are V- and U-shaped channels. Three patterns were identified of filled-channels, including onlap, complex, and prograded channels with low sinuosity in most cases. There is a high relation between sediment characterized size and sinuosity that reflects the size of transported sediments, which is coarser-grained in these channels with high energy and velocity of flow dynamics, because low sinuosity was found in the Upper Frio Formation. The advanced seismic attribute used in this study provides better results to increase the ability to predict the subsurface channel geometry.