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7th Middle East Geosciences Conference and Exhibition
Manama, Bahrain
March 27-29, 2006
Interpretation
in the Gulf and Its Implication for the Understanding of
the Khuff System
1 Total S.A, Pau, France, phone: +33 (0)5 59 83 41 90, [email protected]
2 Structural
Geology, sedimentology and Geology Laboratory, Total S.A, Total, Avenue Larribau, Pau, France
3 DGEP/SCR/RD/PJ - MGR, TOTAL, CSTJF, Avenue Larribau, Pau, 64018, France
The Permian-Triassic Khuff Formation is a major reservoir in the Middle East Gulf region and contains some of the world's biggest gas reserves. 130,000 km of 2D seismic (including 96.000 km of the “Persian Carpet” seismic covering most of the Iranian side of the Gulf) have been interpreted in order to:
- Establish a geotectonic framework for the Khuff system and evaluate the impact of pre-Khuff structuration on Khuff depositional patterns.
- Assess the post-depositional tectonic evolution at the plate-scale and evaluate its possible impact
on structuration, fracturing,
stratigraphic
architecture and diagenetic evolution, at the production scale.
- Integrate
structural
observations and interpretations at the field scale (3D HR seismic, core data and image log data) with plate -scale features (regional scale seismic
interpretation
), and propose a tectonic calendar.
The hydrocarbon fields, which are located in different tectonic settings (including salt domes, horsts, folds of different ages,
and draping over basement highs), display a remarkable coherence in structural
features across interpretational scales.
Hence there is a coherence from
structural
features identified on cores and image logs, to those of the 3D HR seismic
interpretation
, all the way through to structures mapped on the regional seismic at the plate-scale. This coherence of
structural
interpretations at all observational scales illustrates the importance of a large-scale regional framework to better
understand the reservoir-scale
structural
features, and their possible impact on production.