| BLOCK NAME | PARTIES | DATE OF APPLICATION | EFFECTIVE DATE | ACREAGE |
| Block 1 (a) | Petro-Canada Trinidad and Tobago and Petroleum Company of Trinidad and Tobago Limited Now Centrica (Horne & Wren) Limited and Petroleum Company of Trinidad and Tobago Limited | 14th January, 2004 | 5th July, 2005 | 62,011 hectares |
| Block 1 (b) | Petro-Canada Trinidad and Tobago and Petroleum Company of Trinidad and Tobago Limited Now Centrica North Sea Gas Limited and Petroleum Company of Trinidad and Tobago Limited | 14th January, 2005 | 5th July, 2005 | 58,591 hectares |
| Block 2 (ab) | BHP Petroleum (Trinidad – 2ab) Inc. And Talisman (Trinidad) Holdings Ltd. | 5th January, 1996 | 4th June, 1996 | 133,504 hectares |
| Block 2 (ab) NEW | Centrica Resources (Armada) Limited and Petroleum Company of Trinidad and Tobago Limited | 30th November, 2006 | 8th July, 2009 | 160,509 hectares |
| Block 2 (c ) | BHP Petroleum (Trinidad) Inc. And ELF Petroleum Trinidad B.V. Now BHP Billiton (Trinidad 2C) Ltd. And Total E&P (Trinidad) B.V. and Chaoyang Petroleum (Trinidad) Block 2C Limited | 30th June, 1995 | 22nd April, 1996 | 51,766 hectares |
| Block 3 (a) | BHP BILLITON (TRINIDAD-3A) LTD. BG Trinidad EC Limited Talisman (Trinidad Block 3A) Ltd. Elf Exploration Trinidad BV Now BHP Billiton (Trinidad 3A) Ltd. And Kerr-McGee TT E&P Ltd. and Chaoyang Petroleum (Trinidad) Block 3A Limited and Petroleum Company of Trinidad and Tobago Limited and Elf Exploration Trinidad B.V. | 4th September, 2001 | 22nd April 2002 | 61,410 hectares |
| Block 3 (b) | KERR-MCGEE TT OFFSHORE PETROLEUM LTD. And PRIMERA BLOCK 3 (b) LIMITED | 14th January, 2004 | 8th July, 2005 | 64,476 hectares |
| Block 4 (a) 1997 | Conoco Trinidad (4a) BV | 17th June, 1996 | 25th June, 1997 | 45,727 hectares |
| Block 4 (a) NEW | EOG Resources Trinidad Block 4 (a) Unlimited and Primera Block 4 (a) Limited Now EOG Resources Trinidad Block 4 (a) Unlimited | 14th January, 2004 | 6th July, 2005 | 45,727 hectares |
| Block 4 (b) | Conoco Trinidad (4b) B.V. | 17th June, 1996 | 25th June, 1997 | 75,311 hectares |
| Block 4 (b) NEW | Niko Resources (Block 4b Caribbean) Limited | 8th September, 2010 | 18th April, 2011 | 75,327.88 hectares |
| Block 5 (a) | BG Exploration and Production Limited and Texaco Trinidad Inc. Now BG Trinidad 5(A) Limited | 12th November, 1996 | 10th December, 1997 | 40,761 hectares |
| Block 5 (b) | Amoco Trinidad Gas B.V. Repsol Exploration Tobago S.A. Now BP Trinidad and Tobago LLC and Repsol Exploration Tobago S.A. | 5th January, 1996 | 20th January, 1997 | 73,691 hectares |
| Block 5 (c ) | Canadian Superior Energy Inc. Now BG International Limited and Voyager Energy (Trinidad) Ltd. | 14th January, 2004 | 20th July, 2005 | 32,392 hectares |
| Block 5 (d) | BG International Limited | 16th September, 2011 | 14th May, 2012 | 68,420 hectares |
| Block 6 (East Coast, Trinidad) | The Minister of Petroleum And Mines and Texaco Trinidad Inc. and Tenneco Oil Company of Trinidad | 15th March, 1974 | 12th November, 1974 | 260, 000 acres |
| Block 22 | Petro Canada Block 22 Inc. Now Centrica Resources Limited and Petroleum Company of Trinidad and Tobago Limited | 14th January, 2004 | 5th July, 2005 | 296,805 hectares |
| Block 23 (a) | BP Exploration Operating Company Limited and BHP Billiton Petroleum Limited | 18th February, 2011 | 14th May, 2012 | 259,908 hectares |
| Block 23 (b) | BHP Billiton Petroleum (Trinidad Block 23 (b) Limited And Repsol Angostura Limited | 18th February, 2011 | 5th November, 2013 | 258, 485 hectares |
| Block 26 | Exxon Exploration and Production Trinidad (Deepwater) Limited | 2nd April, 1997 | 11th February, 1998 | 119,520 hectares |
| Block 27 | Arco Trinidad Exploration and Production Company, Petrobras Trinidad Ltd. and Union Texas Trinidad Limited | 2nd April, 1997 | 18th February, 1998 | 117,880 hectares |
| Central Range Block – Deep Horizons | Voyager Energy (Trinidad) Ltd and Petroleum Company of Trinidad and Tobago Limited | 30th November, 2006 | 18th September, 2008 | 85,584 hectares |
| Central Range Block – Shallow Horizons | Voyager Energy (Trinidad) Ltd and Petroleum Company of Trinidad and Tobago Limited | 30th November, 2006 | 18th September, 2008 | 73,358 hectares |
| Block E (East Coast, Trinidad) | The Minister of Energy and Energy Industries and British Gas Trinidad Limited and Texaco Trinidad, Inc. Now British Gas Trinidad and Tobago Limited and Chevron Trinidad and Tobago Resources SRL | No date found on the the Database. Contract not found in Legal Library nor Registry File. | 9th September, 1993 | 13,298 hectares |
| Guayaguayare Block – Deep Horizons | Voyager Energy (Trinidad) Ltd and Petroleum Company of Trinidad and Tobago Limited Now Range Resources Ltd. and Petroleum Company of Trinidad and Tobago Limited | 30th November, 2006 | 7th July, 2009 | 118,977.5 hectares |
| Guayaguayare Block – Shallow Horizons | Voyager Energy (Trinidad) Ltd and Petroleum Company of Trinidad and Tobago Limited Now Range Resources Ltd. and Petroleum Company of Trinidad and Tobago Limited | 30th November, 2006 | 7th July, 2009 | 113,381 hectares |
| Block Modified U (a) | EOG Resources Trinidad U(a) Block Unlimited | 30th June, 1995 | 17th July, 1996 | 39,096 hectares |
| Block Modified U(b) | EOG Resources Trinidad U(b) Block Unlimited | 19th November, 2001 | 4th October, 2002 | 38,928 hectares |
| North Coast Marine Area 1 (NCMA 1) | British Gas Trinidad Limited Deminex Trinidad Petroleum GmbH Agip Trinidad and Tobago Limited Now British Gas Trinidad and Tobago Limited and Petroleum Company of Trinidad and Tobago and ENI Trinidad and Tobago Limited and NSGP (Ensign) Limited | The Contractor has requested and the Minister agrees to cancel those certain licences (hereinafter defined in Article 1.32) and issue a Production Sharing Contract. And whereas the Minister has cancelled those certain licences on the 26th day of March, 1997. | 26th March, 1997 | 93,949 hectares |
| North Coast Marine Area 2 (NCMA 2) | Niko Resources (NCMA2 Caribbean) Limited and RWE Dea Trinidad and Tobago GmbH and Petroleum Company of Trinidad and Tobago | 8th September, 2010 | 18th April, 2011 | 101,932.63 hectares |
| North Coast Marine Area 3 (NCMA 3) | Niko Resources (NCMA3 Caribbean) Limited and Petroleum Company of Trinidad and Tobago Limited | 8th September, 2010 | 18th April, 2011 | 210, 633.59 hectares |
| North Coast Marine Area 4 (NCMA 4) | Venture North Sea Oil Limited and Petroleum Company of Trinidad and Tobago Limited Now Centrica North Sea Oil Limited and Petroleum Company of Trinidad and Tobago | 7th September, 2010 | 18th April, 2011 | 182, 936.96 hectares |
| Block TTDAA 3 | BHP Billiton Petroleum (Trinidad Block 3) Limited & BG International Limited | 28th March, 2014 | 2nd December, 2014 | 109,768 hectares |
| Block TTDAA 5 | BHP Billiton Petroleum (Trinidad Block 5) Limited & BG International Limited | 4th September, 2012 | 12th June, 2013 | 109,559 hectares |
| Block TTDAA 6 | BHP Billiton Petroleum (Trinidad Block 6) Limited & BG International Limited | 4th September, 2012 | 12th June, 2013 | 99,747 hectares |
| Block TTDAA 7 | BHP Billiton Petroleum (Trinidad Block 7) Limited & BG International Limited | 28th March, 2014 | 2nd, December, 2014 | 99,827 hectares |
| Block TTDAA 14 | BP Exploration Operating Company Limited and BHP Billiton Petroleum (Trinidad Block 14) Limited | 18th February, 2011 | 14th May, 2012 | 99,808 hectares |
| Block TTDAA 28 | BHP Billiton Petroleum (Trinidad Block 28) Limited | 4th September, 2012 | 12th June, 2013 | 101, 609 hectares |
| Block TTDAA 29 | BHP Billiton Petroleum (Trinidad Block 29) Limited | 4th September, 2012 | 12th June, 2013 | 100,196 hectares |
| Block S 11 (b) | Elf Exploration Trinidad b.v. Amoco Trinidad (S11b) B.V. Repsol Exploration Trinidad S.A. | 27th March, 1996 | 6th November, 1996 | 39,260 hectares |
| Block Lower Reverse “L” | EOG Resources Trinidad – LRL Unlimited | 19th November, 2001 | 29th April, 2002 | 36,382 hectares |