From Indonesian news and google translate: https://katadata.co.id/berita/2019/11/29/skk-migas-cadangan-blok-east-jabung-bisa-mencapai-100-juta-barel
SKK Migas: East Jabung Block Reserve Can Reach 100 Million Barrels
Illustration, Repsol at the IPA Convention and Exhibition (Convex) 2019 at JCC, Senayan, Central Jakarta, Wednesday (4/9/2019). SKK Migas said there are potential oil reserves of 100 million barrels in the East Jabung Block.
Ajeng Dinar Ulfiana | KATADATA
Illustration, Repsol at the IPA Convention and Exhibition (Convex) 2019 at JCC, Senayan, Central Jakarta, Wednesday (4/9/2019). SKK Migas said there are potential oil reserves of 100 million barrels in the East Jabung Block.
The Special Task Force for Upstream Oil and Gas Business Activities or SKK Migas said Repsol was drilling an exploration well in the East Jabung Block. SKK Migas projects that there are potential oil reserves of 100 million barrels.
Deputy Head of SKK Migas Fatar Yani Abdurrahman targets the drilling of the well named Anggun to be completed in January 2020. The drilling results will prove the potential of oil and gas reserves in the East Jabung Block.
"January may have been discovered or not," Fatar told Katadata.co.id, Friday (11/29).
If the Anggun well drilling is successful, then Repsol will increase oil reserves. The reason, BP data said Indonesia's proven oil reserves showed a declining trend from year to year.
(Read: SKK Migas Challenges Pertamina and Medco to Find Oil and Gas Like Repsol)
In 1980, Indonesia's oil reserves reached 11.6 billion barrels but by 2017 only 3.17 billion barrels. This figure is below Malaysia at 3.6 billion barrels and Vietnam at 4.4 billion barrels.
The decline in oil reserves was caused by reduced exploration activities, both for offshore and onshore. In 2011, the realization of drilling was 79 wells, but in 2017 there were only 48 wells.
Investment in the oil and gas sector requires huge funds, moreover national oil reserves in the ocean become an obstacle to exploration. Complete data regarding Indonesia's oil reserves can be seen in the Databoks chart below: