The analyses of conventional structural attributes (first derivative, ant-tracking, phase, curvature, and variance) indicate very complex fracture systems within a Middle Devonian unconventional gas reservoir of the Central Appalachian Basin. In this presentation, we propose to investigate such complexity and the implications of fault networks to the exploration for and production of hydrocarbons. Spectral decomposition (iso-frequency) amplitude analysis was utilized in order to define spectral amplitude response to the fracture facies. The results will be useful to characterize fractured reservoir properties such as fault networks and fracture intensity. We calibrated spectral decomposition attributes using previous petrophysical studies or using structure attributes such as curvature and ant-tracking to determine relationships between spectrally decomposed amplitude attributes and fracture intensity of the reservoir. As a result, this study can potentially enhance the quality of interpretation of seismic data and better define the fracture facies that have important implications for unconventional gas-shale reservoir characterization and CO2 sequestration in the deep subsurface.
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