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28 INDIA'S HYDROCARBON OUTLOOK 2024-2025
2.1.3 MAHANADI BASIN Several biogenic gas fields have been discovered
with strati-structural entrapment conditions.
Mahanadi is a Category II basin with sub- Though hydrocarbon accumulations often
commercial discovered in-place, potential to be indicate charging from in-situ shallower
commercially produced. biogenic source sequences, there are instances
The area geographically overlaps with the where thermogenic accumulations have been
state(s) of Odisha. established.
The basin is situated along the East Coast of The basin hosts a thick pile of sediments, mainly
Indian peninsula. Mahanadi basin is significantly ranging from Early Cretaceous to Recent. The
appraised with strong analogy with the easterly basin’s onland part is mostly covered by the
located Bengal offshore that has numerous Mesozoic sediments which is underlying the
small-to-medium discoveries. Deepwater has Miocene sediments, deposited by the major river
significant discovered Miocene play in form system of Mahanadi. Stratigraphic sequences
of discrete and stacked reservoirs. Enhanced including Gondwanas are reported in some
exploration opportunities exists for the small rift grabens.
prospective Pliocene plays of biogenic origin. Petroleum system model results show
Hydrocarbon occurrences are spread over prospective trend towards northeast part
the Tertiary stratigraphic sequences ranging of offshore adjoining Bengal offshore. High
from the oldest sediments of Paleogene to resolution seismic acquisition for delineating
the youngest sediments of Miocene-Pliocene. deeper plays and supporting pore-pressure
study in high pressure area are the key focus.
Source: DGH Internal Source: DGH Internal
