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Environment Clearance 2022 - Category A
Project Name Asset/Basin/Plant Date of EC Granted
Onshore Development & Production from 105 wells in 12 nomination PML blocks in Sipahijala, West Tripura and Gomati districts of Tripura and 10 wells and Khubal GCS in NELP PML of North Tripura districts, Tripura Tripura

30 May 2022

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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

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 drilling of exploratory wells in OALP-VI Block GV-ONHP-2021/2

Frontier Basin

 12 May 2022
Environmental Clearance for drilling of exploratory well in OALP-IV Block VN-ONHP-2019/2

Frontier Basin

09 Apr 2022
Environmental Clearances for drilling of exploratory wells in OALP-IV Block VN-ONHP-2019/1

Frontier Basin

 20 Mar 2022
Environmental Clearances for drilling of exploratory wells in OALP-IV Block VN-ONHP-2019/4

Frontier Basin

 20 Mar 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 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 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 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 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 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 GOAO falling in Gojalia PML at Rajapur Tehsil, Paikhola, South 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 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 ROBP falling in Konaban Field PML at Konaban, Debipur Tehsil, Sepahijala district Tripura Asset 09 Nov 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 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 AMAA’ falling in West Tripura PML at Champahaur Tehsil, Sukiabari, Khowai Tripura Asset 08 March 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
Offshore oil/gas development by drilling of four wells by M/s ONGC Ltd. under the NELP V Offshore Block CB-OSN-2003/1 at Aliabet Field, Ankleshwar Asset (Gujarat) Ankleshwar Asset 22 Apr 2020
Exploration in Kangra-Mandi PEL Block in Mandi and Kangra Districts, Himachal Pradesh Frontier Basin 15 Apr 2020
Expansion of onshore oil & gas processing plant by M/s ONGC Ltd. at Uran by establishing Additional Cogeneration Unit GT-IV and Enhanced Reactive Thermal Oxidizer (ERTO) within the existing Uran Plant, located in Uran, Maharashtra Uran Plant 13 Oct 2020
CRZ Clearance for laying of 20-inch gas pipeline of 31 km length from Offshore Platform, in the East Coast passing through the mouth of the Gautami – Godavari River, part of Yanum (2.51 km) U.T. of Puducherry and East Godavari District, Andhra Pradesh Eastern Offshore Asset 15 Oct 2020
Conversion of exploratory well KSAB to Development well located at Kasomarigaon, District Golaghat, Assam Jorhat Asset 08 Dec 2020

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Environment Clearance 2019
Project Name Asset/Basin/Plant Date of EC Granted
Expansion of OGT and CPP at onshore and addition of Process cum Living Quarters Platform bridge connected to Well Head Platform at offshore of Development Operation by M/s Gujarat State Petroleum Corporation Ltd in KG-OSN-2001/3 Offshore Block at Village Mallavaram, Mandal Tallarevu, District Godavari (Andhra Pradesh) HP-HT Asset 30 Jul 2019
Deen Dayal Development project (KG-OSN-2001/3 Block NELP-III) regarding setting up of offshore well Head platform in KG Basin, offshore to onshore sub-sea pipeline, Onshore gas terminal (OGP), Condensate Storage Unit / (CSU) at Mallavaram, Andhra Pradesh with landfall point at Avipolam Hamlet of Yanam in Puducherry HP-HT Asset 13 Nov 2019
Onshore exploration, development and production of oil & gas in 21 onshore PML blocks in Upper Assam North, A & AA Basin at District Sivasagar (Assam) A&AA Basin 06 Dec 2019
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
Onshore Oil & Gas exploration by drilling 46 wells in 12 ML Blocks of Western Onshore Basin, District Mehsana, Gujarat Western Onshore Basin 06 Dec 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
Exploratory Drilling of 134 locations (Onshore) in 32 ML Blocks of Western Onshore Basin at Vadodara, Gujarat Western Onshore Basin 27 Dec 2019
Onshore development and production of oil and gas from six wells in 5 Mine Lease Blocks in Districts Jorhat and Golaghat (Assam) Jorhat Asset 01 May 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
Onshore Development and Production of Oil & Gas from 200 wells in 23 blocks in District Sivasagar (Assam) Assam Asset 06 Mar 2019
Exploratory drilling of two wells in NELP Block AA-ONN-2001/2, in District Kolasib (Mizoram) A& AA Basin 28 Mar 2019
Development and production of Oil / Gas from Uber-2 well by M/s ONGC Ltd. at Jambusar (Gujarat) Ankleshwar Asset 06 Mar 2019

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Environment Clearance 2018
Project Name Asset/Basin/Plant Date of EC Granted
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
Onshore Development and Production of Oil and Gas from 72 wells in two onland PML Blocks (Godavari, West Godavari and Krishna (Andhra Pradesh) Rajahmundry Asset 31 Oct 2018
Exploratory Drilling of 22 Wells (Onshore) in Ramanathapuram PML Block, District Ramanathapuram (Tamil Nadu) Cauvery Basin 30 Aug 2018
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
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 10 ML Blocks of Western Onshore Basin in the Districts of Patan and Mehsana (Gujarat) Western Onshore Basin 20 Mar 2018
Onshore Oil & Gas Development and Production from 9 wells by M/s ONGC Ltd in the Districts of South Tripura, Gomati and Sepahijala (Tripura) Tripura Asset 20 Mar 2018
Expansion of Hazira Gas Processing Complex by adding Captive Combined Cycle Power Plant at Tehsil Chorasi, District Surat (Gujarat) Hazira Plant 22 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
Expansion of Uran Oil & Gas Processing Plant by adding LPG bullets at Uran Complex, Tehsil Uran, District Raigad (Maharashtra) Uran Plant 21 Feb 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
Exploratory Drilling of 10 wells at Rudrasagar, Geleki, Lakwa, Namti, Mekeypore-Santak-Nazira PML areas in District Sivasagar A&AA Basin 28 Sep 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
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
Drilling of Exploratory Wells (50 Nos.) in 9 PML Blocks in Tripura 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
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
Proposed Exploratory drilling of 13 exploratory wells in PML area of SAS Balock in Sarupathar Tehsil District Golaghat, Assam 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
Drilling of Exploratory wells (25 Nos.) in PEL & PML Blocks of Cachar Forward Base in Assam A&AA Basin 19 Apr 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
Additional Exploratory Drilling of 15 wells in NELP-1 Offshore Block KG-DWN-98/2, KG Basin, Andhra Pradesh KG Basin 28 Mar 2017
Proposed 8 no. of exploratory drilling in ML areas of Sivasagar, Assam A&AA Basin 20 Mar 2017
Development of Jharia CBM Block, Jharkhand CBM Asset 11 Apr 2017

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Environment Clearance 2016
Project Name Asset/Basin/Plant Date of EC Granted
Development Plan of CBM Block (BK-CBM-2001/1 in District Bokaro, Jharkhand by M/s ONGC) CBM Asset 28 Mar 2016
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
Development drilling of 45 wells at Block KG-DWN-98/2, KG offshore, Tehsil Allavaram, District East Godavari, Andhra Pradesh Eastern Offshore Asset 22 Jan 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
Development of Vashishta and S-1 fields of K.G. offshore, Eastern Offshore Asset at Kakinada, Andhra Pradesh and expansion of Odalarevu Onshore Terminal, A.P. Eastern Offshore Asset 12 Nov 2015
Exploratory Drilling of 4 wells at NELP-VII Block, VN-ONN-2009/3, Son Valley, Vindhyan, Frontier Basin, District Damoh, Madhya Pradesh Frontier Basin 27 Oct 2015
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
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. Jan'13 to Mar'13 in Mehsana Asset Mehsana Asset 6 Nov 2013
Additional Exploratory Drilling of 20 wells in KG offshore (IA, IB, IG, IE & IF) Block in Andhra Pradesh KG Basin 6 Mar 2014
Environment Clearance of Additional Exploratory Drilling of 8 wells in NELP- VI KG Offshore A.P. KG Basin 11 Aug 2014
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. Apr'13 to June'13 in Mehsana Asset Mehsana Asset 4 Jan 2014
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
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

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Environment Clearance 2013
Project Name Asset/Basin/Plant Date of EC Granted
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
Exploratory drilling (24 additional wells) in onshore PEL Block L-II of Cauvery Basin, District Nagapattinam, Tamil Nadu Cauvery Basin 21 Aug 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 3 Wells in Onshore NELP-VII Block PR-ONN-2005/1 of Cauvery Basin, Tamil Nadu Cauvery Basin 14 Oct 2013
Environmental Clearance for Exploratory Drilling of 25 wells in KG onland PEL Blocks in AP KG Onland 14 Jun 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 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 drilling Exploratory Well in Offshore NELP Block KG-OSN-2004/1, KG Basin in AP KG Offshore 2 May 2013
Environmental Clearance for Additional Exploratory Drilling in Kangra-Mandi under PEL Block, Himachal Pradesh PEL Block, Himachal Pradesh 21 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
Environmental Clearance for drilling of Exploratory well Indara #1 of Frontier Basin NELP VI Block, UP 11 Mar 2013
Environmental Clearance for Exploratory Drilling in Off-shore of Cauvery Basin(04.09.2012) Cauvery Basin 04 Sep 2012
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
Environmental Clearance letter for NELP Blocks of FB (26.07.2011) Frontier Basin, Rajasthan 26 Jul 2011

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Environment Clearance 2012
Project Name Asset/Basin/Plant Date of EC Granted
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
Environmental Clearance for drilling of 4 Exploratory wells at Suket #1 of Frontier Basin.(05.09.12) Frontier Basin 5 Sep 2012

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Environment Clearance 2011
Project Name Asset/Basin/Plant Date of EC Granted
Environmental Clearance for exploratory well Chechat-1 of Frontier Basins (08.12.2011) Frontier Basins 8 Dec 2011
Environmental Clearance for Clearance w.e.f. 01.01.2010 to March 2011 & Granted by MoEF during 2011-12 Pan-India
Environmental Clearance letter for NELP Blocks of Cauvery Basin (14.01.2011) Cauvery Basin 14 Jan 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