Page 30 - DGH_Annual_Report

30 INDIA'S HYDROCARBON OUTLOOK 2024-2025

2.1.4 ANDAMAN BASIN

Andaman is a Category II basin with sub-commercial discovered in-place, potential to be
commercially produced.

Source: DGH Internal Source: DGH Internal

Andaman is an offshore basin, characterized • Hydrocarbon prospectivity and Basin
primarily by siliciclastic shallow to deepwater maturity:
sediments. Fore-arc has a significant gas
discovery in Miocene, analogous to producing In the basin, 6 plays are identified within
reservoirs of Myanmar and Indonesia gas fields. Eocene-to-Middle Miocene in East Andaman
and Cretaceous-Tertiary in West Andaman.
Gas hydrate has also been established in Fore- Petroleum system was modelled in 3D where
arc. Back-arc area has sediments with prominent datasets were adequate and Aerial Yield method
entrapment features on seismic. was used where data were limited. Though
biogenic system was envisaged, it was not
Hydrocarbon occurrences are reported in Mid modelled.
Miocene Play, geographically present in East
Andaman part. Potential future gas discoveries Offshore East sub-basin has a total hydrocarbon
are considered mainly within structural in-place of 55 MMTOE. This includes discovered
entrapment conditions. The hydrocarbon in-place of 2 MMTOE and undiscovered risked
accumulation often indicates charging from in-place of 53 MMTOE. The discovered in-place
deeper source sequences. is subject to commercial development. The
basin has 96.4% of total in-place, potential to be
Geochemical data and structural complexity explored and discovered.
are key areas of focus. Southeastern area of
East Andaman is considered prospective due Offshore West sub-basin has a total hydrocarbon
to source rock maturity. Basin area is under in-place of 16 MMTOE and this is entirely
revision to 248,908 sq km, subject to a detailed undiscovered risked in- place. The basin has
review during the next hydrocarbon resource 100% of total in-place, potential to be explored
assessment study. and discovered.