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A quick resume on SEAPEX Meeting Chapter at Perth on 25th of March 2009 on Murray Street

Dear Explorers,

Summary of SEAPEX (by Peter Baillie-TGS Nopec)

The main idea of the presentation, I think to introduce how well the backscatter technology revealed the resolution to identify where the HC seep is on top of Seafloor, with examples taken accros Indonesia deepwater area of exploration.

A) SEASEEP:
1. High resolution multibeam bathymetri and backscatter which could image
- up to 100% seafloor topography, define structure trend and modern offset
- Identify location and concentration of HC seep for coring by using function of hardness of seafloor (impendance), roughness of seafloor and volumetric scattering. It works like a sonar signal)
2. Hull mounted sub bottom profiler (seismic to 100ms) to locate hazard, gas chimney and gas clouds)
3. Powerful combination with grav mag
4. Navigating the piston cores

B) PROJECTS
1. SO far in Indonesia TGS Nopec has these list :
- 2D seismic of 34000 line km across N sumatra, Sunda, Bone, Banggai Sula, Misool Onin, Seram, Jamdera, Kumawa and Cendrawasih
- Multibeam 400,000 km2
- GravMag 140,000 line km
- Sediment Cores
- Geochem area
- Heatflow probes

C) PROJECT EXAMPLES
1. ?Chirpline (Around Salawati Basin to SW)
Usng Backscatter Tgs claimed to have this analysis :
- 434 Carbon Isotopic ratio sets distinguished gas
- Biomarker analysis suggest that the SR come from Mesozoic as in NWS Australia, and Tertiary Marine
2. Cendrawasih Bay
-2006 Perception
Basement consist of Granit and exposed Gneiss along margin
Non prospective tectonic model
Neogene Rift
-Analisis taen in the eastern coast of Cendrawasih (waipago through) Bay along from Yapen Island
Mud Volcano is observedwith some HC effect seen on Seismic reflection
HC Seep observed in the ?fold belt which appears in seafloor
29755 km SEASEEP analysis project is heading forward

3. Andaman (North Sumatra)
-Multibeam seep project of 20626 km2
-2D Seismic line of 1464km
-?ForeArc Basin type (but TGS Nopec is willing to call this is not a classic foreacr basin but ?continuation of continental something)
-Analog for this type of Basin found at Japan and ?Alaska

Tgsnopec.com would be one of resource to dig out the infos, I would reckon

Salam GEA