Petroleum
Systems of the Mumbai Offshore
Goswami, Basant
Giri1, Harvir Singh1, A. K.
Bhatnagar1, A. K. Sinha1, Ram Raj
Singh1 (1) KDM Institute of Petroleum Exploration, Oil & Natural
Gas Corporation Ltd, Dehradun, India
Results indicate that only Panna Formation has good to
excellent effective source rocks throughout the basinal
part of each block in entire basin. Middle of Panna
Formation has attained a 0.6% VRo at about 12-20 Ma
in various blocks. Panna source rock in the lower
layer has predominantly Type III kerogen but contains
mixed kerogen in the upper layer. However, Panna source rock in few wells in Mahim
graben and DCS area also possess Type I kerogen. Based upon the variations in the organofacies, oils have been placed into two groups.
Group-I oils having only terrestrial signatures and correlate with the source
rock extracts from the lower layer whereas the group-II oils have mixed input, isotopically heavier than the group-I oils and correlate
with the source rock extracts from upper layer of the Panna
Formation. Major petroleum systems in the basin are: Panna-L-III,
Panna-Mukta, Panna-Bassein
and Panna-Panna.
AAPG Search and Discover Article #90063©2007 AAPG Annual Convention, Long Beach, California