Project Profile
Value: US$175 million
Location: North Cambay Basin, Gujarat, India
Reserves: 23.28 MMt
OIIP: 53.56 MMt
Production: 14.46 MMt
Exploration start-up:-1971
Production start-up: -1974
Santhal oil field of Mehsana Asset in North Gujarat is located in the southern part of the heavy belt of North Cambay Basin. It was discovered in 1971 and put on production in 1974. The crude oil of this field is having 17°API gravity and average viscosity of 150 cP at reservoir conditions. The field has OIIP (Oil Initially In Place) of 53.56 MMt with ultimate reserves of 23.28 MMt. The envisaged primary recovery was only 17% of OIIP. Therefore to enhance the oil recovery from the field, an EOR technique - In-situ Combustion (ISC) was implemented in 1997. So far 14.46 MMt oil has been produced from the field which is 27% of OIIP.
In February 2017, ONGC Board approved investment of US$617 million for redevelopment of Santhal oil field. The project involves the investment of US$175 million for the redevelopment of the Santhal oil field. The redevelopment project includes drilling of 129 new wells, revamping and upgradation of 2 GGS-cum-CTFs in the field and construction of a new ETP (Effluent Treatment Plant) of 4000 m3/d capacity. After implementation of this scheme, cumulative oil production from the field is expected to be 20.46 MMt (i.e. 38.2% of OIIP) by the year 2029-30, i.e. an incremental crude oil production of 3.44 MMt.
Operators:
ONGC: 100% interest