India's Hydrocarbon Outlook – 2022-2023

37 DGH: 3 DECADES OF UNLOCKING INDIA'S HYDROCARBON POTENTIAL In terms of awarded acreage that are now active in Krishna-Godavari (KG) basin, 4,882 sq km are under Nomination, 1,580 sq km are in producing fields under Pre-NELP/NELP, 4,921 sq km lie under NELP, 6,308 sq km are under HELP & 2,387 sq km lie under DSF. Under National Seismic Programme, conducted during 2016-22 in unappraised onland areas, 981 LKM broad- band 2D seismic data were acquired in the basin. As of March 1, 2023, NDR, for Krishna- Godavari (KG) basin has archived 230,304 LKM of 2D seismic data, 255,343 SKM of 3D seismic data, 1,329 drilled well information. Under OALP Bid Round VIII, one ultra- deepwater block of 1,200 sq km area has been offered. In the upcoming Offshore Mega OALP Round IX, there is an opportunity of 24,745 sq km prospective areas that are carved into three blocks, one located in shallow-water and two others in ultra-deepwater. Status, available datasets and opportunities ANDHRA PRADESH TELANGANA ODISHA CHHATTISGARH TAMIL NADU MAHARASHTRA PUDUCHERRY 0 60 120 180 240 30 KM KRISHNA GODAVARI BASIN LEGEND PRODUCING FIELD NELP BLOCK NOMINATION PML DSF BLOCK HELP BLOCK 2D SEISMIC 3D SEISMIC WELLS ONLAND BASIN SEDIMENTARY BASIN SHALLOW WATER BASIN DEEPWATER BASIN DGH Internal Prospectivity The Krishna-Godavari (KG) basin has a total hydrocarbon inplace of 4,766 MMTOE, out of which 1,976 MMTOE has been discovered and it includes both commercial and sub-commercial inplace. The remaining, 2,790 MMTOE, nearly 59% of total inplace, is potential to be explored and discovered. The basin has been assessed earlier during 1995- 96 study along with 14 other basins. During 2017 Hydrocarbon Resource Assessment Study, 3D PSM (Petroleum System Modelling) approach has been used due to availability of adequate datasets. The 2017 resource reassessment study has incorporated 85,300 LKM of 2D seismic data, 68,000 SKM of 3D seismic data, 770 drilled well information. Data quality is good. Gravity, geochemical, 2D/3D seismic, well data and reports are excellent while magnetic data are of good quality. Reliability of results is excellent. 3D PSM and Trap Density method have been used to assess hydrocarbon resources due to good data control for making robust 3D static model. Mapping of facies propagation in deepwater areas is challenging. Synrift and Eocene plays can be targets for exploration. Intensive exploration is recommended for inherent prospectivity of the basin. The area towards the eastern part outside the current basin boundary have data. This area was however excluded during the 2017 resource study for lack of congruence check with basin. The area is proposed to be taken up along with Mahanadi basin in the next periodical assessment. The play-level undiscovered (risked) hydrocarbon inplace for Krishna-Godavari (KG) basin is given below: 236 MMTOE 163 MMTOE 131 MMTOE 5 MMTOE 36 MMTOE 106 MMTOE 505 MMTOE 187 MMTOE 30 MMTOE 59 MMTOE 606 MMTOE Cenozoic Pliocene (Biogenic): Cenozoic Pliocene (Thermogenic): Cenozoic Miocene (Biogenic): CenozoicMiocene (Thermogenic): Cenozoic Eocene: Cenozoic Paleocene: Mesozoic Cretaceous (Late): Mesozoic Cretaceous (Early): Mesozoic Jurassic (Late): Mesozoic Triassic: Paleozoic Permian: Archean Basement 732 MMTOE The onland part of the basin is spread into the state of Andhra Pradesh.