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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

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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

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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

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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

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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

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Environment Clearances FY 2024-25 - Category B
Project Name Asset/Basin/Plant Date of EC Granted
Drilling and exploratory location AA-ONO-211-BGA-A falling at Sepahijala District

Tripura Asset

14 Mar 2025
Drilling and exploratory location SNAA falling at Sepahijala District

Tripura Asset

14 Mar 2025
Drilling and exploratory location KHBV falling at North Tripura

Tripura Asset

14 Mar 2025
Exploratory Drilling of 02 wells in OALP-VI BLOCK, ( 302.57 Sq Km) GV-ONHP-2021/2, District Ballia, Uttar Pradesh

Uttar Pradesh

03 Jan 2025
Exploratory Drilling for 04 nos. of Exploratory wells in OALP-VII Block SR-ONHP-2021/1 in the districts of Shahdol and Umaria, Madhya Pradesh

Madhya Pradesh

03 Jan 2025
Drilling and exploratory location KUAR falling at West Tripura District

Tripura Asset

18 Dec 2024
Drilling and exploratory location ROMAA falling at Sepahijala District

Tripura Asset

18 Dec 2024
Drilling and exploratory location AA-ONO-184-BOA-B (OALP-III PEL) falling at Sepahijala District

Tripura Asset

18 Dec 2024
Drilling and exploratory location ROKAA falling at Sepahijala District

Tripura Asset

18 Dec 2024
Drilling and exploratory location ROKAB falling at Sepahijala District

Tripura Asset

18 Dec 2024
Drilling and exploratory location KHBW falling at North Tripura

Tripura Asset

18 Dec 2024
Exploratory drilling of 04 wells in Bengal Onshore OALP-V Block BP-ONHP-2019/2 situated in East Medinipur and West Medinipur Districts of West Bengal under MBA Basin, Kolkata

MBA Basin

12 July 2024

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Environment Clearances FY 2023-24 - Category A
Project Name Asset/Basin/Plant Date of EC Granted
Onshore development & production from 5 wells falling in forest area of 3 PML blocks in South Tripura, Sepahijala and West Tripura districts, Tripura

Tripura 

12 October 2023
Exploratory Drilling for Oil and Gas in Agartala Dome Baramura, Khowai, Kalyanpur West and South Tripura

Tripura 

11 October 2023
Onshore Development and Production of oil & gas from 145 wells in 30 ML blocks in Bharuch, Surat and Vadodara districts, Gujarat

Ankleshwar

13 April 2023
Onshore development and production of oil and gas from 15 Development wells and establishment of Quick Production 2005/4 situated in North 24Systems (QPS) in NELP VII block WBONN-Parganas and Nadia districts, West Bengal

MBA Basin

13 April 2023

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Environment Clearances FY 2023-24 - Category B
Project Name Asset/Basin/Plant Date of EC Granted
Onshore Oil and Gas Exploration and Appraisal in OLAP Block GS-ONHP-2021/1 by drilling 3 wells in Junagarh district of Gujarat

Western Onshore Basin

20 Feb 2024
EC for Oil and Gas Exploration & Appraisal of 12 wells in six MLs (Gandhar-EXT-III, IV, V, VI, VII and IX) of Western Onshore Basin in Bharuch district of Gujarat

Western Onshore Basin

20 Feb 2024
EC for Exploratory Drilling of 3 Exploratory Wells in OALP ML blocks GK-ONHP-2019/1 & GK-ONHP-2021/1 in Kachchh District of Gujarat

Western Onshore Basin

20 Feb 2024
EC for Dilling and exploratory location SDAX

Tripura

30 December 2023
EC for Dilling and exploratory location KUAO

Tripura

30 December 2023
EC for Dilling and exploratory location GOAR

Tripura

30 December 2023
EC for Dilling and exploratory location GOAP

Tripura

30 December 2023
EC for Dilling and exploratory location GOAQ

Tripura

30 December 2023
EC for Dilling and exploratory location SDAW

Tripura

30 December 2023
EC for Dilling and exploratory location KUAN

Tripura

30 December 2023
Proposed Onshore Exploratory drilling of 08 wells in Bengal Onshore OALP-IV Block BP-ONHP-2019/1 situated in East Medinipur and West Medinipur Districts of West Bengal

MBA Basin

13 Dec 2023
Drilling of Sixteen Exploratory Oil & Gas Wells in OALP PEL Blocks CB-ONHP-2020/1 and CB-ONHP-2021/1, Ahmedabad & Gandhinagar Districts, Gujarat

Western Onshore Basin

05 December 2023
EC for Dilling and exploratory location DRAA

Tripura

12 October 2023
EC for Dilling and exploratory location KHBS

Tripura

12 October 2023
EC for Dilling and exploratory location KHBQ_Z

Tripura

12 October 2023
EC for Dilling and exploratory location GOAN

Tripura

12 October 2023
EC for Dilling and exploratory location BRMAK

Tripura

12 October 2023
EC for Dilling and exploratory location ADAW

Tripura

12 October 2023
EC for Dilling and exploratory location SDAU

Tripura

02 August 2023
EC for onshore Oil & Gas exploration and appraisal from 46 wells in 17 ML block in Mehsana, Gandhinagar, kheda and Anand districts of Gujarat

Western Onshore Basin

26 July 2023
EC for Exploratory drilling of three wells in the CB-ONHP-2019/1 Block of Mehsana district

Western Onshore Basin

26 July 2023
EC for Exploratory Drilling of 10 wells in the OALP block CB-ONHP-2021/2, Western Onshore Basin, Gujarat

Western Onshore Basin

05 July 2023
EC for Onshore exploration of hydrocarbon from 25 wells in 10 ML Blocks in Anand & Vadodara District

Western Onshore Basin

08 June 2023
Corrigendum in EC for setting up of Onshore oil and gas exploration, development & production (including early production) at 3 wells

Western Onshore Basin

19 April 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

MBA Basin

13 April 2023

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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

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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

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Environment Clearance 2022 - Category B
Project Name Asset/Basin/Plant Date of EC Granted
Onshore Additional Exploration drilling of 50 wells in Godavari on-land PML blocks of KG Basin in East and West Godavari Districts of Andhra Pradesh

Rajasthan

12 Oct 2023
Onshore Additional Exploration drilling of 50 wells in Godavari on-land PML blocks of KG Basin in East and West Godavari Districts of Andhra Pradesh

KG Basin

06 Dec 2022
Exploration drilling of 3 wells in CD-ONHP-2020/1 (OALP-VI) Block of Cuddapah Basin in Kurnool, Avantapur and YSR KADAPA Districts of Andhra Pradesh

KG Basin

06 Dec 2022
Grant of Environmental Clearance (EC) to the proposed Project Activity under the provision of EIA Notification 2006-regarding

Frontier Basin

09 Dec 2022
Proposed Onshore Exploratory drilling of 7 wells in Bengal Onshore OALP-III Block BP-ONHP-2018/1 situated in North 24 Parganas and South 24 Parganas districts, West Bengal by M/s. ONGC Limited, MBA Basin

MBA Basin

26 Sep 2022
Exploratory drilling (10 wells) in NELP VII block WB-ONN-2005/4 situated in North 24 Parganas and Nadia districts, West Bengal

MBA Basin

26 Sep 2022
Drilling of exploratory wells in OALP-VI Block GV-ONHP-2021/1

Frontier Basin

03 Aug 2022
Environmental Clearance for Proposed project for “Drilling of exploratory wells (38 nos.)in the non-forest areas of Cachar district PML block and Pre-NELP Block AA-ONJ/2,Assam” Jorhat Asset 15 March 2022

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Environment Clearance 2021 - Category A
Project Name Asset/Basin/Plant Date of EC Granted
Environmental Clearance for conversion of 37 exploration wells & laying of Associated Flowlines, involving construction of Well Manifold at Kunjaban & Sundalbari and Pipeline at NorthTripura Tripura Asset

28 Oct 2021
Environment Clearance for Exploration, Development and Production in five onshore PML blocks in AAFB, A&AA Basin, Cachar District and Karimganj District, Assam A&AA Basin 27 Sep 2021
Onshore Development and Production of oil & gas from 53 wells in 7 ML blocks by M/s Oil and Natural Gas Corporation Limited located in Jorhat and Golaghat districts, Assam Jorhat Asset 17 March 2021
Development Drilling of 406 wells by M/s ONGC located at Mehsana, Gandhinagar and Patan – Consideration of Environment Clearance Mehsana Asset 25 Jan 2021

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Environment Clearance 2021 - Category B
Project Name Asset/Basin/Plant Date of EC Granted
Environmental Clearance for Onshore Exploration of Oil & Gas from 2 wells (KHBD & NRAD) in Forest Area in 3 ML Blocks Golaghat District ,Assam

Assam and Assam Arakan Basin

27 April 2021
Environment Clearance for Exploration in Upper Assam Shelf (South) in Jorhat and Golaghat District, Assam for 4 forest locations (KSAD, KSAE, KSAI and KSAH) in forest area

Assam and Assam Arakan Basin

26 April 2021
Drilling of Exploratory Wells THAA, TJAA & BRAK under the project “Drilling of 45 Exploratory wells in Upper Assam Shelf (South) area encompassing Jorhat and Golaghat, Assam

Assam and Assam Arakan Basin

16 March 2021
Environmental Clearance Certificate for drilling and exploratory location BRMAE falling in West Tripura PML at Baikunthapur Tehsil, Dakshin Dasgharia, West Tripura

Tripura Asset

15 March 2022
Environmental Clearance Certificate for drilling and exploratory location BRMAJ falling in West Tripura PML at Baikunthapur Tehsil, Subal Singh, West Tripura Tripura Asset 08 March 2021
Environmental Clearance Certificate for drilling and exploratory location GOAI falling in Gojalia PML at Srinagar Tehsil, Tekka Tulsi RF, South Tripura Tripura Asset 08 March 2021
Environmental Clearance Certificate for drilling and exploratory location BMSD falling in Baramura Extn-IV PML at Patni Tehsil, Harbhanga, West Tripura Tripura Asset 08 March 2021
Environmental Clearance Certificate for drilling and exploratory location TIAG falling in Tichna PML at Jagatrampur, Kathalia Tehsil, Sonamura Sub-Division, Sepahijala district Tripura Asset 04 Sep 2021
Environmental Clearance Certificate for drilling and exploratory location BRMAE falling in West Tripura PML at Baikunthapur Tehsil, Dakshin Dasgharia, West Tripura Tripura Asset 08 March 2021
Environmental Clearance Certificate for drilling and exploratory location BREB falling in Bararnura Extension-IV PML at Birganj Tehsil, Baramura- Debtamura RF, Gomati district Tripura Asset 09 Nov 2021
Environmental Clearance Certificate for drilling and exploratory location ROBL falling in Manikyanagar-Sonamura Ext-I PML at Veluarchar Tehsil, Veluarchar, Sepahijala district Tripura Asset 04 Sep 2021
Environmental Clearance Certificate for drilling and exploratory location BRMAD falling in West Tripura PML at Chandpur Tehsil, Domrakaridak, West Tripura Tripura Asset 08 March 2021
Environmental Clearance Certificate for ‘Drilling and exploratory location BMST’ falling in Baramura Extn-IV PML at Killa Tehsil, Uttar Baramura-Debtamura RF, Gomati Tripura Asset 08 March 2021
Environmental Clearance Certificate for ‘Drilling and exploratory location AMAA’ falling in West Tripura PML at Champahaur Tehsil, Sukiabari, Khowai Tripura Asset 08 March 2021
Environmental Clearance Certificate for drilling and exploratory location GOAO falling in Gojalia PML at Rajapur Tehsil, Paikhola, South Tripura Tripura Asset 08 March 2021
Environmental Clearance Certificate for drilling and exploratory location ROBP falling in Konaban Field PML at Konaban, Debipur Tehsil, Sepahijala district Tripura Asset 09 Nov 2021
Environmental Clearance accorded for Drilling of 5 exploratory wells in NELP-VIII Block VN-ONN-2009/3 Frontier Basins 11 Oct 2021

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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

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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

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Environment Clearance 2018
Project Name Asset/Basin/Plant Date of EC Granted
Onshore Oil and Gas Development and Production from 3 wells by M/s ONGC Ltd at Nagayalanka in the onland NELP-V Block KG-ONN-2003/1 in District Krishna (Andhra Pradesh) Rajahmundry Asset 20 Mar 2018
Development and Production of Coal Bed Methane Gas by M/s ONGCL – CIL Consortium at Raniganj North block, District Paschim Bardhaman (West Bengal) CBM Asset, Bokaro 06 Jul 2018
Exploratory Drilling of 22 Wells (Onshore) in Ramanathapuram PML Block, District Ramanathapuram (Tamil Nadu) Cauvery Basin 30 Aug 2018
Oil and Gas Exploration in 10 ML Blocks of Western Onshore Basin in the Districts of Patan and Mehsana (Gujarat) Western Onshore Basin 20 Mar 2018
Development and Production of Gas in Banskandi and Bhubandar Block with Interconnecting pipelines by M/s ONGC Limited at Tehsil Silchar, District Cachar (Assam) Exploratory Asset, Silchar 06 Jul 2018
Shale Oil & Gas Exploration in 11 Blocks by M/s Oil and Natural Gas Corporation Ltd in Cambay Basin in the districts of Mehsana, Gandhinagar, Ahmedabad, Kheda and Bharuch (Gujarat) Western Onshore Basin 20 Mar 2018
Oil and Gas Exploration in 13 ML Blocks in Western Onshore Basin by M/s ONGC Ltd in Surat, Bharuch and Vadodara (Gujarat) Western Onshore Basin 6 Mar 2018

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Environment Clearance 2017
Project Name Asset/Basin/Plant Date of EC Granted
Proposed exploratory drilling of 13 exploratory wells in PML area of SAS Block in Sarupathar Tehsil District Golaghat A&AA Basin

31 Mar 2017
Drilling of Development wells (108 nos.) in oil field of Ahemdabad Asset of ONGC Ltd. at Mehsana and Gandhinagar, Gujarat Ahmedabad Asset 20 Mar 2017
Development Drilling of one well (BKDB)-A of M/s ONGC Ltd in Banaskandi PML Block of Cachar, A&AA Basin, District Cachar (Assam) A&AA Basin 13 Sep 2017
Exploratory Drilling of 5 wells for shale oil/shale gas in KG Basin, Andhra Pradesh KG Basin 15 Jun 2017
Drilling of Exploratory wells (25 Nos.) in PEL & PML Blocks of Cachar Forward Base in Assam A&AA Basin 19 Apr 2017
Drilling of Exploratory Wells (50 Nos.) in 9 PML Blocks in Tripura A&AA Basin 13 Sep 2017
Development drilling of 108 wells laying of 4”and 8”oil and gas flow lines & establishment of 03 numbers of EPS, 01 number of WHI, 03 nos of Water injection facilities and 03 nos. of ETP of M/s ONGC in operation areas of Cambay Sub Asset in Gujarat Cambay Asset (Gujarat) 16 Mar 2017
Drilling of 6 Exploratory Wells (RBK-1, LBAA, RPAA, RLBK-1, RTDN-1 and RBK-3) in Pre-NELP Block AA-ONJ/2 at Cachar, Assam A&AA Basin 06 Mar 2017
Drilling of Five Exploratory Wells at MB-OSN-2005/3 (NELP VII Block), Mumbai Offshore, Southwest of Mumbai High DCS platform, Maharashtra Western Offshore Basin 04 Aug 2017

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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

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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

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Environment Clearance 2014
Project Name Asset/Basin/Plant Date of EC Granted
Monitoring data of waste pit water & Drill cutting for wells drilled during Qtr. Jan'14 to Mar'14 in Mehsana Asset Mehsana Asset 17 Feb 2014
Monitoring data of waste pit water & Drill cutting for wells drilled during Qtr. July'13 to Sept'13 in Mehsana Asset Mehsana Asset 9 Aug 2013
Additional Exploratory Drilling of 20 wells in KG offshore (IA, IB, IG, IE & IF) Block in Andhra Pradesh KG Basin 6 Mar 2014
Monitoring data of waste pit water & Drill cutting for wells drilled during Qtr. Jan'13 to Mar'13 in Mehsana Asset Mehsana Asset 6 Nov 2013
Monitoring data of waste pit water & Drill cutting for wells drilled during Qtr. Oct'13 to Dec'13 in Mehsana Asset Mehsana Asset 4 Jan 2014
Additional Exploratory Drilling of 10 wells of M/s Oil and Natural Gas Corporation Limited (ONGCL) in NELP-1, Offshore Block KG/DWN-98/2 in KG Basin, Andhra Pradesh KG Basin 24 Jan 2014
Monitoring data of waste pit water & Drill cutting for wells drilled during Qtr. Apr'13 to June'13 in Mehsana Asset Mehsana Asset 4 Jan 2014
Environment Clearance of Additional Exploratory Drilling of 8 wells in NELP- VI KG Offshore A.P. KG Basin 11 Aug 2014

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Environment Clearance 2013
Project Name Asset/Basin/Plant Date of EC Granted
Exploratory Drilling in NELP-VIII (Block: OSN-2009/1, KG-OSN-2009/2 & KG-OSN-2009/4 in KG Offshore in Basin off Andhra Pradesh KG Offshore 26 Feb 2013
Additional Exploratory drilling of 7 wells in KG offshore (PEL & NELP-1) Block in Andhra Pradesh KG Offshore 04 Sep 2012
Posting Environmental Clearance for exploratory drilling in NELP VIII Block, GK-OSN-2009/1 in Kutch offshore Kutch Offshore 14 Jun 2013
Exploratory Drilling of additional 2 Wells (MDM-H & One additional Well) in On-shore NELP-IV Block CY-ONN-2002/2 of Cauvery Basin, Nagapattinam District, Tamil Nadu Cauvery Basin 12 Mar 2013
Posting Environmental Clearance for exploratory drilling in NELP VIII Block, GK-OSN-2009/2 in Kutch Offshore Kutch Offshore 14 Jun 2013
Environmental Clearance for drilling Exploratory Well in Offshore NELP Block KG-OSN-2004/1, KG Basin in AP KG Offshore 2 May 2013
Development drilling of wells (on-land, 24 development wells) and establishment of early production facilities (one) at Malleswaram, Distt Krishna, AP Rajahmundry Asset 16 Sep 2013
Environmental Clearance letter for NELP Blocks of FB (26.07.2011) Frontier Basin, Rajasthan 26 Jul 2011
Environmental Clearance for Exploratory Drilling in Off-shore of Cauvery Basin(04.09.2012) Cauvery Basin 04 Sep 2012
Environmental clearance for Exploratory drilling of additional 8 wells in NELP-VI Block CB-ONN-2004/2, Cambay Basin, Western Onshore, Baroda Cambay Basin 2 May 2013
Environmental Clearance for Exploratory Drilling of 25 wells in KG onland PEL Blocks in AP KG Onland 14 Jun 2013
Environmental Clearance for Additional Exploratory Drilling in Kangra-Mandi under PEL Block, Himachal Pradesh PEL Block, Himachal Pradesh 21 Jun 2013
Exploratory drilling (24 additional wells) in onshore PEL Block L-II of Cauvery Basin, District Nagapattinam, Tamil Nadu Cauvery Basin 21 Aug 2013
Exploratory Drilling of 3 Wells in Onshore NELP-VII Block PR-ONN-2005/1 of Cauvery Basin, Tamil Nadu Cauvery Basin 14 Oct 2013

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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

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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

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Environment Clearance 2010
Project Name Asset/Basin/Plant Date of EC Granted
Environmental Clearance letter for NELP Blocks of WOB (20.09.2010) WOB 20 Sep 2010

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Environment Clearance 2009
Project Name Asset/Basin/Plant Date of EC Granted
Environmental Clearance for ONSHORE Development Drilling, Projects and Platforms from ASSETS, OFFSHORE Pipelines, Supply Base and Plants w.e.f. 14.09.2006 up to 31.12.09 Pan-India