Salawati and Halmahera Basin

Fig. 1. Seismic section across prospects in
Kofiau PSC (Niko Resources)

Fig. 2. Prospects map in
Kofiau PSC (Niko Resources)
Niko Resources operates Kofiau Block in the west of Salawati Basin and identified a number of prospects such as Dugong, Gajah, Calon, Ajek, Balig and Elit. Ajek has been drilled in 2013.

A semi regional seismic line across key structures in Kofiau PSC is displayed in Fig. 3.

Fig. 3 Seismic line across the prospects (Niko Resources)
A zoom-in seismic section of Balig and Ajek structure is available as Fig. 4. and the strike line across Ajek is displayed in Fig. 5.

Fig. 4. Seismic section of Balig and Ajek
structure (Niko Resources)


Fig. 5. Strike seismic section across
Ajek structure

Seismic section across Balig and Ajek structure. The seismic reflectors above the yellow horizons are stronger, whilst below they are generally very dim.

 A seismic strike line across Ajek structure
A seismic strike line across Ajek structure

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East Palawan Basin

 SeaBird Exploration and Searcher Seismic shot 2D seismic lines in East Palawan basin (Fig. 1) and a seismic example is provided as shown in Fig. 2.

SeaBird Exploration website:

Table of Content / Basin Index

The basins and/or regions are sorted using the following index number on the map. The list of the basins is provided below the map.

List of Basins / Regions:
  1. Sumatra Fore-arc Basins
  2. North Sumatra Basin
  3. Central Sumatra Basin
  4. South Sumatra Basin
  5. Bengkulu Basin
  6. Sunda Asri Basin
  7. Northwest Java Basin
  8. South Java Basin
  9. Northeast Java Basin
  10. The Lesser Sunda Islands
  11. Timor Sea Region
  12. Kai-Tanimbar and Weber Basin
  13. Arafura Sea & Akimeugah Basin
  14. Waiponga / Waropen region
  15. Misool-Onin High and Bintuni Basin
  16. Salawati Basin & Halmahera Basins
  17. Banda-Buton Region
  18. Banggai-Sula 
  19. Gorontalo Basin
  20. North Sulawesi Basin
  21. Tarakan Basin Complex
  22. Kutei Basin
  23. Makassar Strait Basins
  24. Barito & Asem-asem Basin
  25. Southwest Borneo Basins (Melawi, Ketungau, Pembuang)
  26. Natuna Sea Region
  27. Malay Basin
  28. Pattani Basin
  29. Irrawady-Andaman Basin & Central Burma Basin
  30. Bengal Basin
  31. Khorat Basin
  32. Nam Con Son Basin
  33. Cuu Long Basin
  34. Phu Khanh Basin
  35. Song Hong / Yinggehai Basin
  36. Beibuwan Basin
  37. Qiongdongnan Basin
  38. Hoang Sa & Truong Sa Basin (Paracel and Spratly Islands)
  39. Sarawak / Luconia Basin
  40. Baram / Sabah Basin
  41. Southwest & Northwest Palawan
  42. East Palawan Basin
  43. Sandakan Basin
  44. West Luzon
  45. East Philippines Basins (South East Luzon / Visayan Basin / Cotabato-Davao Basin)

Nam Con Son

Nam Con Son Basin is the southern most sedimentary basin offshore Vietnam. The majority of the basin is located in a shallow water (less than 200 meters) but to the north the bathymetry can goes deeper than 2000 meters.

Key seismic sections were published by Swiecicki and Maynard (2009):

Seismic expression of rifting events (Swiecicki & Maynard, 2009) shows 2 major rifting episodes:
1) Oligocene- Early Miocene rift system (Oligocene North-South extension)
2) Middle Miocene - Pleistocene rift system (Middle Miocene NW-SE extension)

Regional cross section
Lan Tay and Hoa Dao structure complex on a NW-SE regional seismic line by Restrepo-Pace (2007).

 1st Rift system
Tien Cau syn-rift and Cau post rift as indicated on seismic.

2nd Post rift deposits
Seismic details on Dua Formation, Early Miocene in age

Mang Cau Syn-Rift 2
Significant thickening towards Hoa Dao high is observed in this seismic section.

Nam Con Son Post Rift 2.

Bien Dong - Post rift sag phase
Progradational sequence on top of bathyal shales (transparant unit)

Bien Dong - Post rift sag phase
Progradational sequence on top of bathyal shales (transparant unit)

Bien Dong channels
Time slice showing the channel complex.

Eearly Pliocene (LBD) Channel System
Time slide and seismic section in both strike and dip directions.

Upper Bien Dong progradational system
Petronas Tower as a scale for the canyon system on the left.
Comparing seismic sections and time slice.

Upper Bien Dong progradational system

Swiecicki, T. and Maynard, K., 2009, Geology and Sequence Stratigraphy of Block 06/94, Nam Con Son Basin, Offshore Vietnam, SEAPEX