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Implementation of Enhanced oil Recovery Techniques in India: New Challenges and Technologies
Baskaran, Vijai Kumar (University of Petroleum & Energy Studies, Dehradun, India) | Dani, Kamal Chandra (University of Petroleum & Energy Studies, Dehradun, India) | Kumar, Krishna Pavan (University of Petroleum & Energy Studies, Dehradun, India) | Urkude, Ashish Manohar (University of Petroleum & Energy Studies, Dehradun, India)
Copyright 2014, Society of Petroleum Engineers This paper was prepared for presentation at the SPE EOR Conference at Oil and Gas West Asia held in Muscat, Oman, 31 March-2 April 2014. This paper was selected for presentation by an SPE program committee following review of information contained in an abstract submitted by the author(s). Contents of the paper have not been reviewed by the Society of Petroleum Engineers and are subject to correction by the author(s). The material does not necessarily reflect any position of the Society of Petroleum Engineers, its officers, or members. Electronic reproduction, distribution, or storage of any part of this paper without the written consent of the Society of Petroleum Engineers is prohibited. Permission to reproduce in print is restricted to an abstract of not more than 300 words; illustrations may not be copied. The abstract must contain conspicuous acknowledgment of SPE copyright. Abstract India's crude oil reserves tend to be light and sweet, with specific gravity varying from 38 API in the offshore Mumbai High field to 32 API at other onshore basins. India produced roughly 880 thousand barrels per day (bbl/d) of total oil in 2009 from over 3,600 operating oil wells. Enhanced oil recovery (EOR) is a term applied to methods used for recovering oil from a petroleum reservoir beyond that recoverable by primary and secondary methods. Primary recovery normally refers to the production using the energy inherent in the reservoir from gas under pressure or a natural water drive. Secondary recovery refers to usually refers to injection of water or water flooding thus, enhance oil recovery is often synonymous with tertiary recovery. Four group of methods -thermal recovery, gas miscible recovery, chemical flooding and microbial flooding are included in this collection. Implemented EOR techniques in India include alkaline surfactant flooding (ASF) in Jhalora-Rajasthan, Kalol-Gujarat, and Ankleshwar-Gujarat, immiscible hydrocarbon water alternating gas injection (HC-WAG) in Gandhar fields-South Gujarat, in-situ combustion/air Injection and simultaneous water and gas injection (SWAG) in Mumbai High.
- Asia > India > Gujarat (1.00)
- Asia > India > Maharashtra > Mumbai (0.44)
- Asia > Middle East > Oman > Muscat Governorate > Muscat (0.24)
- Geology > Petroleum Play Type > Unconventional Play > Heavy Oil Play (0.68)
- Geology > Rock Type > Sedimentary Rock > Clastic Rock (0.46)
- Energy > Oil & Gas > Upstream (1.00)
- Government > Regional Government > Asia Government > India Government (0.47)
- North America > United States > Texas > Permian Basin > Yeso Formation (0.99)
- North America > United States > Texas > Permian Basin > Yates Formation (0.99)
- North America > United States > Texas > Permian Basin > Wolfcamp Formation (0.99)
- (33 more...)
Abstract The reservoir performance and management of the Bombay High field with 25 years of production history has been reviewed. Bombay High is one of the most complex fields in terms of reservoir heterogeneity. The major reservoir (L-III) is multi-layered with 10 limestone layers of 5–10m thick which are separated by 2 to 5m shale. More than 600 development wells, both producers and injectors have been drilled. The very nature of this giant field and large and aging facilities have necessitated frequent reviews and changes in the development strategy of the field. The field is in the decline phase and has associated problems like increase in water cut and high GOR, which in-turn is effecting the oil production. Pressure maintenance by water injection is uneven in the reservoir due to heterogeneity. Problems being faced are differential depletion of sub-layers and associated poor primary cementation and mud losses during drilling of infill wells. Infill drilling through available spare slots and side-tracking/re-drilling of the existing wells, drilling of horizontal wells, drainholes and ERD have been taken up to increase the production and also to augment the water injection. Massive well intervention programs like water shut off and gas shut off are being taken up to reduce the excess water and gas production. The paper also discusses, the utilization of tools like Downhole video and PLT for problem identification, Ball sealer for selective stimulation and Gel treatment for controlling excessive water and gas production, water flood surveillance programs and facilities optimization. Sectorial approach, adopted for reservoir management has helped, in better well level monitoring, which becomes very essential in mature fields like Bombay High, in the identification of pressure sinks and better voidage compensation, fluid movements and design of well intervention programs and facilities optimization. A multi-disciplinary team concept has been embraced for better reservoir management. The advantages of multidisciplinary teams, which are working for the re-development plan, with detailed/improved reservoir characterization, incorporating the 3D seismic data and reservoir simulation model, is highlighted. Introduction The Bombay High field is located 160 Km W-NW offshore from Mumbai (Bombay) in Western Coastal shelf of India at a water depth of 75m. It was discovered in 1974 and was put on production in May 1976. The field has large areal extent of about 1200 Sq Km and is a giant field. It is divided into Bombay High North (BHN) and Bombay High South (BHS) by a narrow east-west graben. (Fig.-1). The field production of BHN @120575 bopd and BHS @308097 bopd peaked during 1985 and 1989 respectively. The water injection started in 1984 and 1987 in BHN and BHS respectively. The field maintained the plateau rate of production of about 19.0 MMt for about 7 years i.e. from 1984 to 1990. It has passed the mature stage of its producing life and has entered into the decline phase.The field is fully developed with 660 wells (690 strings), with complete facilities for production, processing, evacuation and sale. Over 50% of the facilities are approaching their originally designed life. The present paper discusses about the development stages and reservoir management of the field.
- Overview (0.46)
- Research Report (0.34)
- Geology > Rock Type > Sedimentary Rock > Carbonate Rock (0.48)
- Geology > Rock Type > Sedimentary Rock > Clastic Rock > Mudrock > Shale (0.34)
- Energy > Oil & Gas > Upstream (1.00)
- Water & Waste Management > Water Management > Lifecycle > Disposal/Injection (0.91)
- North America > United States > Texas > Permian Basin > Yeso Formation (0.99)
- North America > United States > Texas > Permian Basin > Yates Formation (0.99)
- North America > United States > Texas > Permian Basin > Wolfcamp Formation (0.99)
- (26 more...)