Sunda - Asri Basin (Southeast Sumatra Basin)

The Asri and Sunda Basins are located offshore Southeast Sumatra under the SE Sumatra Production Sharing Contract (PSC). Currently, Pertamina Hulu Energi OSES operates in the Asri and Sunda Basins, known as the Southeast Sumatra (SES) Block (Figure 1).

Source: Ralanarko, D. Wahyuadi, D., Nugroho, P., Syafri, Almabrury, A., and Nur, A. A., 2020, Seismic Expression of Paleogene Talangakar Formation - Asri & Sunda Basins, Java Sea, Indonesia, Berita Sedimentologi #46

Fig.1. Southeast Sumatra Block

Fig. 2. Basin configuration of Sunda and Asri Basin with some structural components.

Fig. 3. Typical N-S seismic cross section, Sunda Basin

Fig. 4. West-East seismic section across Sunda Basin

Fig. 5. Seismic section across several fields in the region, from Zelda, Tati, to the border with ONWJ Block.

Fig. 6. North-South oriented seismic section across Asri Basin, in the north of the area.

Fig. 7. West - East oriented seismic section across Asri Basin.

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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Reference:
http://www.nikoresources.com/upload/media_element/69/01/indonesia-full-presentation-smaller-file.pdf

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.

Reference:
SeaBird Exploration website: http://www.sbexp.com/multi-client/pala-sulu-2d