Oil and Natural Gas Corporation Limited (ONGC) is an Indian multinational oil and gas company headquartered in Dehradun, Uttarakhand, India.

Please find the below attached image for the ONGC Group of Companies:



List of ONGC Subsidiaries:

ONGC Videsh:

Presence of ONGC Videsh Limited (OVL) in Latin America;

Brazil (Block BC-10, BM-SEAL-4, BM-BAR-1, BM-ES-42, BM-S-73 & S-74)
Colombia (Block LLA-69, RC-8, RC-9, RC-10, SSJN-7 & CPO-5)
Cuba (Block N-25, N-26, N-27, N-28, N-29 N-34, N-35 & N-36 Block)
Venezuela (Block San Cristobal, Block Carabobo-1)

Presence of ONGC Videsh Limited (OVL) in CIS & Far-East;

Vietnam (Block 06.1, 127, 128)
Myanmar (Block A-1, A-3, AD-2, AD-3 & AD-9, Pipeline Project- PipeCo-1, PipeCo-2)
Russia (Block Sakhalin-I, 69, 70–1, 70–2, 70–3, 77, 80, 85–1, 85–2 and 86)(15% shares in csjc vancourneft company of vancour)
Kazakhstan (Satpayev Exploration Block)

Presence of ONGC Videsh Limited (OVL) in Africa;

Libya (Block NC-189, 81–1, Contract Area 43)
Nigeria (Block OPL 279, OPL 285, Block-2)
Sudan & South Sudan (GNOP/GNPOC/GPOC- 1, 2 & 4, Block 5A, Pipeline- Khartoum-Port Project)
Mozambique (Rovuma Area 1 Offshore)

Presence of ONGC Videsh Limited (OVL) in Middle East;

Iraq (Exploration Block-8)
Syria (Al Furat (4 PSA), Block-XXIV)
"Mangalore Refinery and Petrochemicals Limited":

Address:

Office Address :
Tel Bhavan
Dehradun : 248003
Uttaranchal ,India .
Oil and Natural Gas Corporation (ONGC) Phone Number : (135) 2752161 2752162