India's Hydrocarbon Outlook – 2022-2023

93 DGH: 3 DECADES OF UNLOCKING INDIA'S HYDROCARBON POTENTIAL Bastar is a Category III basin and it has an area of 5,360 sq. km. which is entirely onland. In the basin, 1 play is known within Pre- Cambrian. Bastar Basin, one amongst the several Proterozoic sedimentary basins is located over Peninsular India. Geoscientific data available is very limited and the elements of petroleum system in the basin are largely speculative. The basin is characterized by Meso-to-Neo-Proterozoic sediments, named Indravati Group, and it unconformably overlies the Archean basement complex. The maximum sedimentary thickness of the basin in the order of 500-600 m. Entire Proterozoic sequence of the basin has been considered as a single play, sub-divided by a fault into two assessment units. Paleo-to-Meso-Proterozoi Basuhari-Rhotas play of Vindhyan Basin is considered a close analogue. Prospectivity The Bastar basin has a total hydrocarbon inplace of 1 MMTOE, which is entirely undiscovered and potential for intense exploration. The basin has been assessed for the first time. During 2017 Hydrocarbon Resource Assessment Study, Aerial Yield method has been used on analogy of Vindhyan Basin. Geological map, gravity map, magnetic profiles (2 lines of 383km and 403km) and geochemical data (adsorbed gas from 204 samples) are used in the study. Gravity data are of good quality; Magnetic data and their reports are of fair quality; Geochemical data are poor with no availability of seismic and well data. The data reliability is good. Vindhyan Basin has been used as analogue. Inadequate geoscientific data leads to adopting areal yield method to assess the hydrocarbon resources. No subsurface information is available. Focus should be provided for low sediment thickness. Results may be reviewed as and when new sets of data are available. 26. BASTAR BASIN DGH Internal DGH Archive