The OCTek Seismic project aims to investigate the structure and tectonics of deepwater rifted margins by applying quantitative geodynamic analysis to interpretations of ION BasinSPAN seismic data. ION Geophysical have provided both the seismic data and the interpretations for the project.
Along the lines of each BasinSPAN OCTek Seismic produces a montage of profiles showing:
• Moho depth and crustal-basement thickness
• Crustal thinning factor and beta factor
• Crustal structure of the Ocean-Continent-Transition (OCT)
• Magmatic-type at the outer margin
• Variations in crustal-basement density and seismic velocity
The proprietary quantitative methods which have been applied are:
• OCTek gravity inversion
• Analysis of Residual Depth Anomalies (RDAs)
• Backstripping and subsidence analysis
• Joint inversion of seismic and gravity data
OCTek Seismic Project is currently investigating the following geographic areas and SPAN surveys:
• The Black Sea - Black SeaSPAN
• NW shelf of Australia - WestraliaSPAN
• Uruguay & N. Argentina - UruguaySPAN & ArgentinaSPAN
• Suriname & Guyana - GuyanaSPAN
The results will be available for purchase by anyone who has licenced the appropriate SPAN-survey or SPAN-lines and will be available on a line-by-line basis for those who have not purchase the whole BasinSPAN.
We believe the results from OCTek Seismic will be of assistance to:
• New Ventures exploration strategy, helping to discriminate continental and oceanic areas, together with crustal and magmatic type, prior to any propriety data acquisition.
• Petroleum Systems modelling, where crustal thickness estimates constrain radiogenic heat input and beta-factors constrain the time-dependent thermal anomaly resulting from rifting and breakup.
If you have an interest in the analysis of any BasinSPAN survey, or in the quantitative analysis of any deepwater seismic information, then please contact us.