India's Hydrocarbon Outlook – 2022-2023

47 DGH: 3 DECADES OF UNLOCKING INDIA'S HYDROCARBON POTENTIAL both commercial and sub-commercial inplace. The remaining, 1,135 MMTOE, nearly 80% 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 approach has been used due to availability of adequate datasets. The 2017 resource reassessment study has incorporated 120,000 LKM of 2D seismic data, 7,500 SKM of 3D seismic data, 610 drilled well information. Data quality is good. Gravity, 2D/3D seismic, well data and reports are excellent while magnetic and geochemical data are good. Reliability of results is excellent. 3D PSM and Trap Density method have been used to assess hydrocarbon resources due to sufficient well and seismic data. Some challenges are mapping of deeper plays and facies propagation of Pre- Albian sequences. Cretaceous and Basement plays can be area of focus. Seismic acquisition in transitional areas along coastal tract and sub-basalt imaging in Gulf of Mannar are recommended. The play-level undiscovered (risked) hydrocarbon inplace for Cauvery basin is given below: 44 MMTOE 178 MMTOE 366 MMTOE 61 MMTOE 117 MMTOE 202 MMTOE 164 MMTOE <1 MMTOE Cenozoic Miocene: Cenozoic Oligocene: Cenozoic Paleocene-Eocene: Mesozoic Cretaceous (Late Campanian - Maastrichtian): Mesozoic Cretaceous (Santonian): Mesozoic Cretaceous (Cenomanian - Turonian): Mesozoic Jurassic: Mesozoic Cretaceous (Early): Archean Basement: 6 MMTOE The onland part of the basin is spread into the state(s) of Andhra Pradesh, Kerala, Puducherry, Tamil Nadu Status, available datasets and opportunities In terms of awarded acreage that are now active in Cauvery basin, 4,028 sq km are under Nomination, 426 sq km are in producing fields under Pre-NELP/NELP, 858 sq km lie under NELP, 17,955 sq km are under HELP, 484 sq km lie under DSF. As of March 1, 2023, NDR, for Cauvery basin has archived 235,569 LKM of 2D seismic data, 85,171 SKM of 3D seismic data, 849 drilled well information. In the upcoming Offshore Mega OALP Round IX, there is an opportunity of 27,155 sq km prospective areas that are carved into three back-to-back blocks, all located in ultra- deepwater. TAMIL NADU KARNATAKA KERALA ANDHRA PRADESH PUDUCHERRY 0 60 120 180 240 30 KM CAUVERY 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