Low-amplitude faults revealed by seismic attribute  analysis in the Khasilat field of the Absheron oil and  gas bearing region

Y.T. Alibekova; A.A. Samadzadeh

doi:10.24028/gj.v47i6.330223

Authors

Y.T. Alibekova Azerbaijan State Oil and Industry University, Baku, Azerbaijan, Azerbaijan
A.A. Samadzadeh Azerbaijan State Oil and Industry University, Baku, Azerbaijan, Azerbaijan

DOI:

https://doi.org/10.24028/gj.v47i6.330223

Keywords:

tectonic disturbance, seismic, Productive Series, Qala Suite, coherence cubes, azimuths, seismic attributes

Abstract

The Khasilat field, located within the Absheron oil-and-gas-bearing region, was selected as the primary research object due to its geological complexity and proven hydrocarbon potential. A concise yet informative description of the research site is presented, emphasizing the comprehensive suite of geological and geophysical investigations. These include stratigraphic and lithological analyses and advanced geophysical methods such as vertical seismic profiling. Particular attention is paid to the Qala Suite deposits that represent the main oil-bearing horizon within the study area; their lithological composition, structural setting, and reservoir characteristics are briefly outlined.

The main issue of the paper concerns the detection and interpretation of tectonic disturbances manifested in the seismic wave-field. Seismic methods, especially when applied in high-resolution formats, are recognized as essential tools for revealing the structural fabric of subsurface formations. Disjunctive dislocations, including faults and fractures, play a critical role in the evolution of hydrocarbon systems.They influence both the accumulation and migration of fluids, as well as the integrity of reservoir traps. For this reason, the detailed mapping of such structural features is crucial for reliable geological modelling and resource evaluation. In this study, seismic attribute analysis techniques including coherence, dip, and azimuth cubes were applied to identify and delineate fault systems. The interpretation results revealed numerous faults aligned in a north-south orientation, along with several transverse faults trending west-east, indicating a complex and potentially productive tectonic framework within the region.

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