Feel free I will tell you working operations of Oil and Natural Gas Corporation Limited (ONGC) so that you can check it easily.

The Oil and Natural Gas Corporation Limited (ONGC) operations include conventional exploration and production, refining to its various products which structured around its plants.

Subsidiaries

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:-
Oil and Natural Gas Corporation Limited (ONGC)
Jeevan Bharti, Tower –II, 124 Indira Chowk
New Delhi – 110001

Phone:-
2330100