India's Hydrocarbon Outlook – 2022-2023

91 DGH: 3 DECADES OF UNLOCKING INDIA'S HYDROCARBON POTENTIAL Bhima-Kaladgi is a Category III basin and it has an area of 14,100 sq. km. which is entirely onland. In the basin, 1 play is identified within Pre-Cambrian. Bhima-Kaladgi are two Proterozoic sub-basins situated over Dharwar craton, covering areas of 5,300 and 8,800 square kilometres respectively. Geoscientific data available is limited and the elements of petroleum system in the basin are largely speculative. The northwestern part of Bhima and northern part of Kaladgi sub-basin are underlain by basalts of the Deccan Trap. Bhima sub-basin is characterized by Neo Proterozoic sedimentary sequence of 250 m thickness whereas Kaladgi sub-basin is represented by 450 m thick Paleo-to-Neo-Proterozoic sediments. Entire Proterozoic sequences in Bhima-Kaladgi Basin has been considered as single play, sub- divided into three assessment units each on the basis of their respective tectonic set-up. Paleo- to-Meso-Proterozoic Basuhari-Rhotas play of Vindhyan Basin is considered a close analogue. Prospectivity The Bhima-Kaladgi basin has a total hydrocarbon inplace of 6 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 is used on analogy of Vindhyan Basin. Sedimentary thickness of 270m (Bhima) and 3,000-4,500m (Kaladgi) are envisaged. Geological map, gravity data, geochemical survey (analysis of adsorbed gas) on few profiles are included in the study. No seismic data is available. Gravity data is of good quality while Magnetic data and report are fair and Geochemical data are poor. The data reliability is good. Vindhyan Basin has been used as analogue. 25. BHIMA-KALADGI BASIN DGH Internal DGH Archive