Khalil Sarkarinejad
Shiraz University
Iran
Title: Application of the spectral decomposition technique for characterizing reservoir inverted fault system in the Abadan Plain, Southwestern Iran
Biography
Biography: Khalil Sarkarinejad
Abstract
The Abadan plain in southwestern Iran has important petroleum reservoir potential in the Zagros Fordland Folded Belt parallel to the Foreland Fold-and-Thrust Belt of the Zagros orogenic belt. This reservoir despite its gentle anticline is much more complex and poorly defined by its structural setting. It is located at the Mesopotamian fore deep basin, bounded by the marginal part of the Zagros Foreland and the Dezful Embayment inverted graben. The main reservoir in this field is the Fahliyan formation, composed of reef carbonates. Most of the Abadan area is flat and covered by recent alluvial deposits with no outcrops. Studies of the structures in this area have provided information about the structural history and allowed better reservoir and drilling management. For better understanding structure and complexity of this reservoir, seismic spectral decomposition techniques have been utilized as a quick and effective interpretation tool. Fast Fourier transform (FFT) and continuous wavelet transforms (CWT) have been used to convert time to frequency domain, and have been applied to detect fault systems in the reservoir. Application of the Fast Fourier transform (FFT) and continuous wavelet transforms (CWT) indicate that the Abadan reservoir consists inverted thrust system of the reservoir which display an early extensional system and have been inverted to dip-slip thrusting paralleling of contour common depth in two sides of the system in some regions and large displacement between two sides of contours in which hanging wall moved over footwall. Various displacements between sides indicate parallel inverted movements which are associated with later compressional faulting and displacement which indicate inversion tectonics.