EI EIA Report for Development Drilling of 108 wells , laying of, 4” and 8” dia. Oil and gas flow lines & establishment of 03 nos. of EPS, 01 No. of WHI, 03 Nos. of Water injection Facilities and 03 nos. of ETP’s in operational areas of ONGC Cambay Asset. EXECUTIVE SUMMARY 1. ITRODUCTIO Project Highlights Oil & Natural Gas Corporation Limited (ONGC), a premier Govt. of India Undertaking and the major National Oil Company, is a vertically integrated company producing crude oil, natural gas and value added products like LPG, NGL, Petrol, HSD etc. Operations of ONGC extend over both onshore as well as offshore within India and outside India. ONGC has proposed Drilling of 108 development wells, laying of, 4” and 8” dia. Oil and gas flow lines & establishment of 03 nos. of EPS, 01 No. of WHI , 03 Nos. of Water injection Facilities and 03 nos. of ETPs in operational areas of Cambay Asset,. The total Block Area is 820.82Sq km 2. The Total Project Cost is INR of Rs. 890 Crores/-. Objective and Scope of EIA study The Objective of EIA study is to meet the regulatory environmental clearance criteria as well as to ascertain a sustainable development through the assessment of likely impacts due to project related activities on the surrounding environment. The study envisages likely assessment of negative impacts and alleviation of these negative impacts, to such extent that it avoids/mitigates any harm/ permanent changes in the naturally existing environment. The scope of the EIA study includes detailed characterization of the existing status of the terrestrial and socio-economic environment within the study area, identification of the potential environmental impacts of the project, and formulation of an effective Environmental Management Plan (EMP) to prevent, control & mitigate the adverse environmental impacts, and ensuring the environmental compliance. Apart from suggesting mitigation measures to the negative impacts, the report suggests implementation of various positive and enhancement measures as a part of project benefit program to people of the nearby areas. This report is based on the TOR approved by Ministry of Environment and Forests, Government of India vide letter- J-11011/187/2014-IA II (I) dated 26 th September, 2014. 2. PROJECT DESCRIPTIO ONGC intends to drill about 108 Developmental Wells in Nine fields namely, Akholjuni, Anklav, Chaklasi, Kathana, Mahi High, Padra, Siswa and NELP block CB-ONN-2001/1(Nadiad) and CB- ONN-2004/2(Vadatal). The salient features of the project have been summarized in the following table: i EI EIA Report for Development Drilling of 108 wells , laying of, 4” and 8” dia. Oil and gas flow lines & establishment of 03 nos. of EPS, 01 No. of WHI, 03 Nos. of Water injection Facilities and 03 nos. of ETP’s in operational areas of ONGC Cambay Asset. Name of the Project : Development Drilling in 9 ML/NELP Onshore blocks Location : Cambay Asset, area in Vadodara, Anand & Kheda District. Total Area of the Project : 9ML/NELP block covers an area of 820.82sq.km, onshore in 3 districts. Total Number of Proposed Wells : 108 wells in 9ML/NELP Blocks Akholjuni - 4 Anklav - 15 Chaklasi - 3 Kathana - 3 Mahi High - 1 Padra - 18 Siswa - 9 Nadiad - 7 Vadtal - 48 Total Estimated Drilling Period for : 90-100 days each Well Proposed Drilling Fluid for each well : Water-based Mud System Water Requirement for each well : 25 KLD HSD Required per day per well : 6 KLD Well Depth : 700 - 1800 m Type of Hydrocarbon Expected : Oil and Gas Estimated Cost of the Project : Rs. 890 Crores 3. DESCRIPTIO OF THE EVIROMET The study area comprises of the total 9 ML Blocks/ oil fields in this asset distributed in three district of Gujarat state namely Anand district, Kheda district and Vadodara district having, total area is 820.82Sq Kms. The existing/ baseline environmental set-up of the Study Area has been studied during the months of October 2014 to December 2014 as described in following sub-headings. Geology & Topography The Cambay Basin is a major NW –SE trending rift graven extending from Gulf of Cambay in south to Barmer Basin of Rajasthan in North. The evolution of the Basin is broadly divided into two stages i.e. Late Jurassic to Early Cretaceous pre-rift stage and Late Cretaceous-tertiary syn-rift-post rift stage. The sedimentary fill ranges from Mesozoic to recent alluvium with a volcanic sequence equivalent of Deccan Traps in between. Based on structural styles, tectonics and structural morphology of Tertiary sedimentary fills, Cambay Basin has been subdivided into five tectonic blocks. ii EI EIA Report for Development Drilling of 108 wells , laying of, 4” and 8” dia. Oil and gas flow lines & establishment of 03 nos. of EPS, 01 No. of WHI, 03 Nos. of Water injection Facilities and 03 nos. of ETP’s in operational areas of ONGC Cambay Asset. The basin came into existence during rifting along N-S to NNW-SSE trend in Late Jurassic to Early Cretaceous. The two dominant NW-SSE and ENE-WSW directions correlate well with the intra- basinal horsts and grabens. Drilling of 108 No. of development wells in the producing oil fields of Cambay Asset by ONGC in coming up years 2014-2015 onwards. Details of proposed wells to be drilled in following ML/NELP Blocks is as below. Table 1. Site Details of Proposed Drilling Locations (Tentative) S. Fields/Blocks Well Lat Long Near by Village No. No. 1 Akholjuni 1 22°20'4.11"N 72°30'8.94"E Navagam Bara 2 2 22°22'2.09"N 72°30'9.84"E Navagam Bara 3 3 22°20'55.93"N 72°30'54.72"E Navagam Bara 4 4 22°20'51.89"N 72°32'1.86"E Navagam Bara 5 Kathana 1 22°18'27.85"N 72°48'54.22"E Diwel 6 2 22°18'14.79"N 72°49'3.62"E Diwel 7 3 22°18'6.09"N 72°48'52.24"E Diwel 8 Siswa 1 22°22'2.46"N 72°52'42.04"E Vadeli 9 2 22°21'55.06"N 72°52'56.67"E Vadeli 10 3 22°21'47.30"N 72°52'28.28"E Vadeli 11 4 22°21'23.52"N 72°52'25.16"E Vadeli 12 5 22°21'12.75"N 72°52'23.15"E Vadeli 13 6 22°20'57.17"N 72°52'30.68"E Vadeli 14 7 22°20'47.20"N 72°53'29.96"E Bhadrniya 15 8 22°18'18.32"N 72°54'10.07"E Vadeli 16 9 22°20'35.53"N 72°53'55.78"E Bhadrniya 17 Anklav 1 22°19'18.55"N 72°55'0.83"E Valvod 18 2 22°19'9.41"N 72°54'59.48"E Valvod 19 3 22°20'25.84"N 72°54'31.35"E Valvod 20 4 22°18'58.31"N 72°55'0.62"E Valvod 21 5 22°18'56.35"N 72°55'7.96"E Valvod iii EI EIA Report for Development Drilling of 108 wells , laying of, 4” and 8” dia. Oil and gas flow lines & establishment of 03 nos. of EPS, 01 No. of WHI, 03 Nos. of Water injection Facilities and 03 nos. of ETP’s in operational areas of ONGC Cambay Asset. 22 6 22°18'51.59"N 72°55'4.63"E Valvod 23 7 22°18'46.26"N 72°55'5.25"E Valvod 24 8 22°18'46.75"N 72°54'58.78"E Valvod 25 9 22°18'42.45"N 72°54'57.05"E Valvod 26 10 22°20'0.97"N 72°54'49.91"E Valvod 27 11 22°19'44.12"N 72°54'57.86"E Valvod 28 12 22°19'59.48"N 72°54'45.83"E Valvod 29 13 22°20'26.82"N 72°55'30.16"E Valvod 30 14 22°20'18.75"N 72°55'26.96"E Valvod 31 15 22°20'26.25"N 72°55'19.09"E Valvod 32 Chaklasi 1 22°43'27.53"N 72°52'45.42"E Nadiad 33 2 22°41'34.43"N 72°56'41.97"E Kanjoda 34 3 22°39'59.65"N 72°55'56.00"E Chakasi 35 Mahi High 1 22°18'0.93"N 72°36'28.46"E Khambhat 36 Padra 1 22°17'52.78"N 73° 5'24.40"E Ampad 37 2 22°17'33.83"N 73° 5'19.33"E Ampad 38 3 22°17'54.16"N 73° 6'8.52"E Ampad 39 4 22°17'50.19"N 73° 6'17.93"E Ampad 40 5 22°16'46.12"N 73° 5'51.73"E Rajpura 41 6 22°16'44.68"N 73° 6'4.89"E Rajpura 42 7 22°16'44.25"N 73° 5'45.20"E Rajpura 43 8 22°15'57.56"N 73° 4'58.56"E Ganpatpura 44 9 22°15'50.31"N 73° 5'8.64"E Ganpatpura 45 10 22°15'16.00"N 73° 4'8.39"E Tajpura 46 11 22°15'12.15"N 73° 4'6.87"E Tajpura 47 12 22°14'55.84"N 73° 4 ʹ11.09 ʺE Tajpura 48 13 22°12'44.56"N 73° 0'39.37"E Ranu iv EI EIA Report for Development Drilling of 108 wells , laying of, 4” and 8” dia.