Environment Clearances FY 2026-27 - Category A
| Project Name | Asset/Basin/Plant | Date of EC Granted |
|---|---|---|
| Onshore Development drilling and production of Oil & Gas from 600 wells in 37 PML Blocks located in Mehsana, Patan, Gandhinagar, and Ahmedabad districts. | Mehsana Asset |
23 March 2026 |
| Onshore development and production of oil & gas from 134 (originally proposed for 140 wells) wells in 17 ML blocks in Cambay Asset in Anand, Kheda and Vadodara districts, Gujarat | Cambay Asset |
23 January 2026 |
Environment Clearances FY 2026-27 - Category B
| Project Name | Asset/Basin/Plant | Date of EC Granted |
|---|---|---|
| Drilling and exploratory location SNAA & SNAB (cluster location) falling at Sepahijala District | Tripura Asset |
13 July 2026 |
| Drilling and exploratory location ROKAC falling at Sepahijala District | Tripura Asset |
13 July 2026 |
| Additional exploratory drilling of45 wells in West Godavari, Malleswaram and Nandigama PML blocks falling in Krishna, Eluru and Eest Godavari districts of Andhra Pradesh | KG Basin |
18 April 2026 |
Environment Clearances FY-2025-26 Category A
| Project Name | Asset/Basin/Plant | Date of EC Granted |
|---|---|---|
| Environmental Clearance granted for drilling of 172 development wells in 8 PML blocks | East Godavari, Andhra Pradesh |
05 September 2025 |
Environment Clearances FY 2025-26 - Category B
| Project Name | Asset/Basin/Plant | Date of EC Granted |
|---|---|---|
| Drilling and exploratory location KUAS falling at West Tripura District | Tripura Asset |
18 Feb 2026 |
| Drilling and exploratory location KUAQ falling at West Tripura District | Tripura Asset |
18 Feb 2026 |
| Drilling and exploratory location KUAP falling at West Tripura District | Tripura Asset |
18 Feb 2026 |
| Drilling and exploratory location BRMAO falling at Gomati District | Tripura Asset |
18 Feb 2026 |
| Drilling and exploratory location ADAX falling at West Tripura District | Tripura Asset |
18 Feb 2026 |
Environment Clearances FY 2024-25 - Category A
| Project Name | Asset/Basin/Plant | Date of EC Granted |
|---|---|---|
| EC for 22 wells in Forest Area in 6 PML Golaghat Jorhat | Jorhat |
25 June 2024 |
Environment Clearances FY 2024-25 - Category B
Environment Clearances FY 2023-24 - Category A
Environment Clearances FY 2023-24 - Category B
Environment Clearances FY 2022-23 - Category B
| Project Name | Asset/Basin/Plant | Date of EC Granted |
|---|---|---|
| Drilling of Exploratory Wells (7 Nos.) at Golaghat Dist. Under the project “Drilling of 45 Exploratory wells in Upper Assam Shelf(South )area encompassing Jorhat and Golaghat ,Assam” by A&AA Basin , ONGC ,Jorhat | Assam and Assam Arakan Basin |
16 March 2021 |
| Environmental Clearance for onshore exploration of oil & gas from 2 wells (KHBD & NRAD) in the forest area in 3 ML Blocks Golaghat District, Assam | Assam |
01 June 2024 |
| Onshore Exploratory drilling of 8 wells in Bengal Onshore OALP-IV Block BP-ONHP-2019/1 in East Medinipur and West Medinipur Districts of West Bengal | MBA Basin |
13 Dec 2023 |
| Drilling of 45 Exploratory Wells in the Upper Assam Shelf (South) area encompassing Jorhat and Golaghat, Assam | Assam |
17 Feb 2023 |
Environment Clearance 2022 - Category A
| Project Name | Asset/Basin/Plant | Date of EC Granted |
|---|---|---|
| Onshore Development and Production of oil & gas from 145 wells in 30 ML blocks in Bharuch, Surat and Vadodara districts, Gujarat | Ankleshwar Asset |
13 Apr 2023 |
| Onshore development and production of oil and gas from 15 Development wells and establishment of Quick Production Systems (QPS) in NELP VII block WBONN-2005/4 situated in North 24 Parganas and Nadia districts, West Bengal | MBA Basin |
13 Apr 2023 |
| Onshore Development and Production of oil & gas from 145 wells in 30 ML blocks in Bharuch, Surat and Vadodara districts, Gujarat | Gujarat |
13 Apr 2023 |
Environment Clearance 2022 - Category B
Environment Clearance 2021 - Category A
Environment Clearance 2021 - Category B
Environment Clearance 2020
| Project Name | Asset/Basin/Plant | Date of EC Granted |
|---|---|---|
| Drilling of Exploratory Wells(3Nos.) from the CP of Well KHE in forest areas of The Nambar ML-Block, Dist. Golaghat, Assam | Assam and Assam Arakan Basin |
09 Dec 2020 |
Environment Clearance 2019
| Project Name | Asset/Basin/Plant | Date of EC Granted |
|---|---|---|
| Onshore Exploration and development of oil & gas by M/s ONGC Ltd in Assam and Assam Arakan Basin (A&AA Basin) in Districts Cachar and Hailakandi (Assam) | A&AA Basin | 07 Aug 2019 |
| Exploratory drilling of two wells in NELP Block AA-ONN-2001/2, in District Kolasib (Mizoram) | A& AA Basin | 28 Mar 2019 |
| Drilling of 15 exploratory wells by M/s ONGC Ltd. in Nohta-Damoh-Jabera PML Block, Vindhyan Basin, District Damoh (Madhya Pradesh) | Frontier Basin | 27 Dec 2019 |
| Offshore oil and gas exploration by M/s ONGC Ltd in Mumbai Offshore Block MB-OSN-2005/1(NELP-VII) on Indian West Coast | Western Offshore Basin, Mumbai | 30 Apr 2019 |
Environment Clearance 2018
Environment Clearance 2017
Environment Clearance 2016
| Project Name | Asset/Basin/Plant | Date of EC Granted |
|---|---|---|
| Development Drilling of (406 nos.) of wells (Oil and natural Gas) in oil Field of Ahmedabad Asset at Kheda, Gandhinagar and Ahmedabad District of Gujarat | Ahmedabad Asset | 22 Mar 2016 |
| Exploratory Drilling of 22 nos. of Wells in NELP-IX Blocks GEI-ONN 201011, CB-ONN-201 0/6 & CB-ONN-201019 at Banaskantha, Gandhinagar and Ahmedabad District, Gujarat | Western Onshore Basin | 28 Mar 2016 |
Environment Clearance 2015
| Project Name | Asset/Basin/Plant | Date of EC Granted |
|---|---|---|
| Exploratory Drilling (3 wells) in Bengal Onshore Block WB-ONN-2005/3, West Bengal under NELP-VII | MBA Basin | 22 Jan 2015 |
| Exploratory Drilling of 10 wells at NELP-VI, Onshore Block CY-ONN-2004/2 in Ariyalur District, Tamil Nadu | Cauvery Basin | 10 Sep 2015 |
| Development of North Karanpura CBM Block NK-CBM-2001/1 in Jharkhand | CBM Asset | 12 May 2015 |
| Drilling of one Exploratory Well at MB-OSN-2005/3 (NELP-VII Block), Mumbai Offshore southwest of the Mumbai High-DCS platform | Western Offshore Basin | 7 Jan 2015 |
Environment Clearance 2014
Environment Clearance 2013
Environment Clearance 2012
| Project Name | Asset/Basin/Plant | Date of EC Granted |
|---|---|---|
| Environmental Clearance for drilling of 4 Exploratory wells at Suket #1 of Frontier Basin.(05.09.12) | Frontier Basin | 5 Sep 2012 |
| Environmental Clearance for Exploratory Drilling of additional 24 On-land Well in KG Basin(18.05.2012) | KG Basin | 18 May 2012 |
| Environmental Clearance for exploratory drilling in Offshore KG-Basin in Andhra Pradesh. (050912) | KG Basin | 5 Sep 2012 |
Environment Clearance 2011
| Project Name | Asset/Basin/Plant | Date of EC Granted |
|---|---|---|
| Environmental Clearance letter for NELP Blocks of Cauvery Basin (14.01.2011) | Cauvery Basin | 14 Jan 2011 |
| Environmental Clearance for Clearance w.e.f. 01.01.2010 to March 2011 & Granted by MoEF during 2011-12 | Pan-India | |
| Environmental Clearance for exploratory well Chechat-1 of Frontier Basins (08.12.2011) | Frontier Basins | 8 Dec 2011 |
| Environmental Clearance of well Palaita #1 of Frontier Basin (17.12.2011) | Frontier Basins | 26 Jul 2011 |
Environment Clearance 2010
| Project Name | Asset/Basin/Plant | Date of EC Granted |
|---|
Environment Clearance 2009
| Project Name | Asset/Basin/Plant | Date of EC Granted |
|---|
