As you want to get job in Indian Oil Corporation Limited (IOCL) through GATE exam score, so on your demand I am telling require cut off :
Oil AND Natural Gas Corporation (ONGC)

Cutoff Marks 2015
Name of the Post UR OBC SC ST
AEE Mechanical 750 721 644 507
AEE Production 706 640 566 430
AEE Drilling 750 739 548 417
AEE Cementing 691 535 322 297
Transport Officer 715 699 NO POST NO POST
MM Officer 756 713 603 505
AEE Electronics 856 856 No Post 639
AEE Electrical 817 736 583 670
AEE Electrical 817 736 583 670
AEE Instrumentation 754 738 541 495
AEE Civil 888 844 No post 759
Geologist 524 442 483 380
Geophysicist (Surface) 524 488 437 190
Geophysicist (wells) 586 416 308 No post
AEE Reservoir 594 543 No Post 184
Chemist 572 554 411 173
Programming Officer 867 No post No post 496

Oil AND Natural Gas Corporation (ONGC) Profile :

Type Public Sector Undertaking

Traded as NSE: ONGC

BSE: 500312

BSE SENSEX Constituent

CNX Nifty Constituent

Industry Oil and Gas

Founded 14 August 1956

Headquarters Tel Bhavan, Dehradun, Uttarakhand, India

Key people Dinesh Kumar Sarraf

(Chairman & MD)

Products Petroleum, natural gas, and other petrochemicals

Revenue 139,364.35 crore (US$21 billion) (2016)

Profit 14,300.93 crore (US$2.1 billion) (2016)

Total equity 4,277.76 crore (US$640 million)

Owner Government of India

Number of employees 32,923 (Mar-2013)

Divisions MRPL

ONGC Videsh Ltd.