India's Hydrocarbon Outlook – 2022-2023

128 DGH: 3 DECADES OF UNLOCKING INDIA'S HYDROCARBON POTENTIAL 5.2 Offshore Sedimentary Basins Amongst the 26 sedimentary basins in India, 10 of them are located either entirely or partially in offshore regions. The sedimentary basins of Kerala Konkan, Andaman, and Mumbai are exclusively situated in offshore regions. In addition, approximately 84% of the basinal area of the Cauvery basin, roughly 86% of the basinal area of the Krishna Godavari basin, around 84% of the basinal area of the Mahanadi basin, roughly 61% of the basinal area of the Saurashtra basin, approximately 47% of the basinal area of the Kutch basin, and 8.6% of the basinal area of the Cambay basin are located in offshore regions." Sr No. Basin Name Basin Category Onland Area SKM Shallow Water Area SKM Deep Water Area SKM Total Area SKM Total Offshore Area SKM Offshore area % of Total Sedimentary Basin Area % of Total Offshore Sedimentary Basinal Area of Country 1 Kerala- Konkan III 0 90,380 4,89,620 5,80,000 5,80,000 100.0% 33.5% 2 Andaman II 0 18,074 2,07,844 2,25,918 2,25,918 100.0% 13.0% 3 Mumbai Offshore I 0 1,18,389 93,611 2,12,000 2,12,000 100.0% 12.2% 4 Cauvery I 37,825 43,723 1,58,452 2,40,000 2,02,175 84.2% 11.7% 5 Krishna- Godavari I 31,456 25,649 1,72,895 2,30,000 1,98,544 86.3% 11.5% 6 Saurashtra II 75,076 42,617 76,421 1,94,114 1,19,038 61.3% 6.9% 7 Mahanadi II 15,500 14,211 69,789 99,500 84,000 84.4% 4.8% 8 Bengal- Purnea III 42,414 33,465 46,035 1,21,914 79,500 65.2% 4.6% 9 Kutch II 30,754 20,500 7,300 58,554 27,800 47.5% 1.6% 10 Cambay I 48,882 4,618 0 53,500 4,618 8.6% 0.3% Total 2,81,907 4,11,626 13,21,967 20,15,500 17,33,593 - 100% Table 5.1: Basins lying in offshore Area Based on the assessment of conventional resource potential, 7 basins have been classified as Category-I, encompassing 30% of the total basinal area and containing 85% of the total unrisked conventional hydrocarbon in-place of 41.8 billion tons of oil and oil- equivalent gas.