Page 35 - DGH_Annual_Report

India's Sedimentary Basins: Subsurface Insights 35

2.2.1 MUMBAI OFFSHORE BASIN

Mumbai Offshore is a Category I basin with commercial discovered in-place.

Source: DGH Internal
Source: DGH Internal
Mumbai basin is exclusively offshore and it is Deepwater areas have a very few wells drilled.
located along the West Coast of Indian peninsula. Deeper sequences, including Paleocene-to-
The basin is the most prolific petroliferous Eocene are the future targets of exploration,
provinces of India, contributing nearly half of oil particularly in Tapti-Daman area.
and gas production of the country annually.
• Hydrocarbon prospectivity and Basin
The deepwater part of the basin is under-explored maturity:
and opportunities lies to chase the basinward
extension of prospective plays (Paleocene and In the basin, 7 thermogenic plays are identified
Eocene). Similarly, Mesozoic plays lying below within Basement and Tertiary. Besides, 3
the Deccan basalts are still elusive in the basin, biogenic plays are established within Mid-to-
hence sub-basalt exploration for Mesozoic play Late Miocene and Plio-Pleistocene sequences.
remains an opportunity. The northerly located Petroleum system was modelled in 3D basis
Saurashtra basin and southerly Kerala-Konkan adequate datasets
basin have Mesozoic sequences identified or Mumbai Offshore basin has a total hydrocarbon
discovered. in-place of 7,171 MMTOE. This includes discovered

Commercial hydrocarbon occurrences are in-place of 4,795 MMTOE and undiscovered
spread over the Tertiary stratigraphic interval risked in-place of 2,376 MMTOE.
ranging from the oldest sediments of Paleogene The discovered in-place is under commercial
to the youngest sediments of Plio-Pleistocene. production. The basin has 33.1% of total in-place,
The hydrocarbons are mostly thermogenic, potential to be explored and discovered.
however the basin has witnessed discovery of
biogenic gas within shallow plays.