Pre-feasibility Report Development Drilling of 24 Drill Sites, Commissioning of two GGS, Capacity expansion of existing M-GPP and laying of underground transportation Pipeline at onshore block AAP- ON-94/1 Tinsukia District, Assam Hindustan Oil Exploration Company Pvt. Ltd. March 2018 Drilling of Wells, Construction of GGS, Pipeline- AAP-ON-94/1 Block Table of Contents 1 INTRODUCTION .......................................................................................................1 1.1 Block Details ................................................................................................................ 2 2 PROPOSED PROJECT ................................................................................................3 2.1 Project Details ................................................................................................................ 3 2.2 Project Justification ..................................................................................................... 5 2.3 Development Drilling................................................................................................. 5 2.3.1 Infrastructure, Accessibility, Land Lease and Site Preparation ................... 5 2.3.2 Drilling Program ................................................................................................. 8 2.3.3 General Requirements of Drilling .................................................................... 8 2.4 Gas Gathering Station .............................................................................................. 11 2.5 Pipeline ....................................................................................................................... 12 2.6 Project Investment .................................................................................................... 12 2.7 Project Schedule ........................................................................................................ 13 3 ECOLOGICAL SETTINGS OF THE AREA...........................................................14 List of Figure Figure 1: Location Map of the Block Area ...........................................................................1 Figure 2: Regional Setting Map .............................................................................................4 Figure-3: Schematic Layout of the GGS .............................................................................12 Figure-4: Ecological Sensitivity Map ..................................................................................15 List of Table Table-1: Expected Cost of the Project .................................................................................12 a HOEC Drilling of Wells, Construction of GGS, Pipeline- AAP-ON-94/1 Block This page is intentionally left blank. b HOEC Drilling of Wells, Construction of GGS, Pipeline- AAP-ON-94/1 Block 1 INTRODUCTION The block AAP-ON-94/1 (area 305 sq. km) is located in Tinsukia district of Assam. The block lies between Latitude 27°18'54.99'' to 27°11'30.00'' North and Longitude 95°56'55.92'' to 95°20'00.00'' East. The block is bounded in the north by Digboi town and the Barajan, Tarajan and Jaipur settlements, in south by Tirap district of Arunachal Pradesh, in the east by Tirap River and in the west by Namrup and Hukanimuri settlement. FIGURE 1: LOCATION MAP OF THE BLOCK AREA The Block AAP-ON-94/1 was first awarded for exploration to Joint Venture Consortium by the Government of India (GoI). Production Sharing Contract (PSC) for Block AAP-ON-94/1 was signed on June 30th 1998. Presently, the JV Consortium of the block comprises of Hindustan Oil Exploration Company Limited (HOEC), Oil India Limited [OIL] and Indian Oil Corporation Ltd (IOCL). Hindustan Oil Exploration Company limited is the Operator and Oil India Limited is the Licensee of the block. The Participating Interest of the JV Consortium in the development phase is as follows: HOEC (26.882%), OIL (44.086%) and IOCL (29.032%). March 2018 1 HOEC Drilling of Wells, Construction of GGS, Pipeline- AAP-ON-94/1 Block JV Consortium had acquired 2D/3D seismic data and drilled three exploratory and two appraisal wells in the block. Several sizeable prospects had been mapped and the Dirok wells drilled by the Consortium had confirmed the presence of multiple gas bearing sands. Based on the Dirok Discovery and subsequent drilling of appraisal wells in the block, which produced hydrocarbon from multiple sands from Girujan Formation; the Ministry of Petroleum and Natural Gas (MoPNG) had approved the Dirok discovery as commercial. Consortium has been granted Environmental Clearance for 2 exploratory drill sites via File No J-11011/50/2006-1A-II (I) during 2007. Public Hearing for the project was conducted at Ledo Railway Club, Ledo, Tinsukia. Pursuant to the aforesaid EC Consortium has drilled 2 exploratory wells within the Block. During 2009 another EC was granted to the Consortium via File no. NoJ-11011/112/2009-1A-II (I) for drilling of three exploratory wells within the Block. As part of this EC an exploratory well was drilled in the Block. During 2017 another EC was granted to the Consortium via File no. via File No. J-11011/245/2014-IA II (I) dated 31st January 2017 for six Development wells, Group Gathering Station (GGS), Gas Processing Plant (GPP) and 11.5 km Gas Pipeline from GGS to GPP. Public Hearing for the project was conducted at Uttar Margherita Rangamancha, Margherita, Tinsukia, Assam on 3rd July 2015. As part of this EC three existing wells put into production and three new wells were drilled. And construction of GGS, GPP and laying of Pipeline are in various development phase of the project. 1.1 BLOCK DETAILS The block AAP-ON-94/1 is located in Assam-Arakan Basin and falls within geologically complex Schuppen Thrust Belt. It is located in Tinsukia District of the State of Assam, NE India. The nearby important towns are Duliajan (Head Quarters of Oil India Ltd) and Dibrugarh. Geologically the block falls within the Schuppen Belt of the Assam-Arakan Basin. The block lies south of the famous Digboi Field. Areas under reserve forest and Wild Life Sanctuary cover northern and western parts of the block respectively. In the central part of the block the river Dihing flows across the block from ENE to WSW. The southern part of the block is covered by uplands and hills. Rest of the area is covered by Tea Garden plantations. Opencast and underground coal mines operated by Coal India Limited are situated in the eastern part of the block AAP-ON-94/1. Dirok-1 is the discovery well in the block with number of gas bearing sands in Girujan Formation. Dirok-2 & Dirok-4 are appraisal wells with depth of 2500m TVD. The appraisal well DRK-2 was drilled on the same plinth within 40 m radius of DRK- 1. Dirok-4 was drilled on southern flank of Dirok structure at a distance of 2 Km March 2018 2 HOEC Drilling of Wells, Construction of GGS, Pipeline- AAP-ON-94/1 Block towards NE. A total of 17 gas bearing sands in Girujan Formation are identified and will be developed in development phase to produce hydrocarbon. 2 PROPOSED PROJECT 2.1 PROJECT DETAILS HOEC intends to drill 24 developmental wells and construct and commission a Gas Gathering Station (GGS) and approx. 5.5 km underground pipeline (GGS to Trunk Pipeline). Following project and facilities are planned: (i) Development drilling of 24 Nos of wells (ii) Setting up of two Gas Gathering Stations (GGS) within the block areas. (iii) Capacity expansion of existing Modular Gas Processing Plant (iv) Laying of flowlines (underground pipelines) to connect well location. (v) Laying of approx. 5.5 km underground pipelines from GGS to trunk pipeline (existing and connected with GPP). (vi) Laying of underground pipeline approx. 8km from existing GPP to IOCL terminal for distribution of gas. Drill Site 1 to 12 and 15 to 18 and GGS-2Dirok Tea Estate and Drill site 13, 14 and 19 to 24 and GGS-1 Powai Mukh, Janglu Kuruka village, Pipeline will be laid through Vitor Powai and Makum Pathar village. The GGS will be located at Vitor Powai village. Regional setting map of the proposed project development is presented in Figure 2. March 2018 3 HOEC Drilling of Wells, Construction of GGS, Pipeline- AAP-ON-94/1 Block FIGURE 2: REGIONAL SETTING MAP March 2018 4 HOEC Drilling of Wells, Construction of GGS, Pipeline- AAP-ON-94/1 Block 2.2 PROJECT JUSTIFICATION The hydrocarbons sector plays vital role in the economic growth of the country. With the ever increasing gap between the demand and supply in the hydrocarbons, the scenario is a challenge for India. India depends on imported crude to meet about 75% of its rapidly growing demand for petroleum products. The hydrocarbon resources available in the AAP-ON-94/1 Block is of immense importance for the country and will help in the growth of the economy and stride to reduce gap of crude oil imports versus self-sufficiency. The enhanced production will benefit the country by reducing the import bill and save foreign exchange and contribute to annual revenue to the Government of India. 2.3 DEVELOPMENT DRILLING 2.3.1 Infrastructure, Accessibility, Land Lease and Site Preparation Accessibility The proposed drill sites falls within Tinsukia district of Assam and well connected with Digboi through NH 38. Dibrugarh is the nearest airport located at distance of 80 km from Digboi which is again directly connected to the metropolis of Kolkata and Guwahati. The nearest railway station is at Margherita. The major towns in this district are Tinsukia, Digboi, Margherita, Doom Dooma