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Edinburgh, United Kingdom

Cairn Energy plc is an independent Scottish oil and gas exploration and production company headquartered in Edinburgh. It has operational interests in Albania, Bangladesh, Greenland, Nepal and Tunisia and produces around 33,000 barrels of oil equivalent per day. It previously had major activities in India, where it made more than 20 discoveries in Rajasthan, including a major oil discovery at Mangala; these were sold through the spin-off of its Indian subsidiary Cairn India to Vedanta Resources in December 2010. As at 30 June 2010, it had total proven commercial reserves of 247.4 million barrels of oil equivalent.Cairn Energy has a primary listing on the London Stock Exchange and is a constituent of the FTSE 250 Index. It has a secondary listing on the Bombay Stock Exchange. Wikipedia.


Singh H.,Cairn Energy Plc | Kataria B.,Government of Rajasthan
TIDEE (Teri Information Digest on Energy and Environment) | Year: 2011

The most efficient system of aeration is developed and to achieve this goal sudden expansion, venturi, and surface aerators, are compared for their oxygenation efficiencies. Venturi and sudden expansion have throat size 0.795 cm and expansion or convergence-divergence ratio of 1.5 that are manufactured in workshops. On the other hand, surface aerators are gear-reducing, mechanically operated aerators with varying depth of submergence. The study finds that for sudden expansion aerator oxygenation efficiency is between 2.855 and 0.8265 kg/(hp.hr). For venturi aerator, the range of Reynolds Number is from 22,745 to 49,648, while oxygenation efficiency was between 2.8578 and 0.6857 kg/hp.hr. For the sudden expansion aerator, the range of Weber Number is 1,131-7,611 and oxygenation efficiency varied from 2.855 to 0.8265 kg/p.hr. In case of venturi aspirator, though the Weber Number and efficiency ranges are 892-4,247 and 2.8578-0.6857 kg/hp.hr, respectively, but from fairly variation curve these ranges are 1,280-3,800 and 2.38-0.68 kg/hp.hr, respectively. Source


Najman Y.,Lancaster University | Bracciali L.,Lancaster University | Bracciali L.,NERC Isotope Geoscience Laboratory | Parrish R.R.,NERC Isotope Geoscience Laboratory | And 3 more authors.
Earth and Planetary Science Letters | Year: 2016

The Shillong Plateau is the only raised topography (up to 2000 m elevation) in the Himalayan foreland. It is proposed to have had a major influence on strain partitioning and thus tectonics in the Eastern Himalaya. Additionally, its position on the trajectory of the summer monsoon means it has influenced the regional climate, with reduced erosion rates proposed over geological timescales in its lee. The timing of surface uplift of the plateau has been difficult to determine. Exhumation rates have been calculated over geological timescales, but these seem at variance with estimates based upon extrapolating the present day velocity field measured with GPS, and it has thus been suggested that exhumation and surface uplift are decoupled. We determine the timing of surface uplift using the sedimentary record in the adjacent Surma Basin to the south, which records the transition from a passive margin with southward thickening sedimentary packages to a flexural basin with north-thickening strata, due to loading by the uplifting plateau. Our method involves using all available 2D seismic data for the basin, coupled to well tie information, to produce isochore maps and construct a simple model of the subsidence of the Surma basin in order to assess the timing and magnitude of flexural loading by the Shillong Plateau. We conclude that the major period of flexural loading occurred from the deposition of the Tipam Formation (3.5- ~ 2 Ma) onwards, which is likely to represent the timing of significant topographic growth of the Shillong Plateau. Our isochore maps and seismic sections also allow us to constrain the timing of thinning over the north-south trending anticlines of the adjacent basin-bounding Indo-Burman Ranges, as occurring over this same time interval. The combined effect of the uplift of the Shillong Plateau and the westward encroachment of the Indo-Burman Ranges to this region served to sever the palaeo-Brahmaputra drainage connection between Himalayan source and Surma Basin sink, at the end of Tipam Formation times (~2 Ma). © 2015 Elsevier B.V. Source


Maheshwari R.,Indian National Institute of Engineering | Krishna C.R.,Indian National Institute of Engineering | Brahma M.S.,Cairn Energy Plc
Proceedings of the 2014 International Conference on Issues and Challenges in Intelligent Computing Techniques, ICICT 2014 | Year: 2014

IP spoofing based DDoS attack that relies on multiple compromised hosts in the network to attack the victim. In IP spoofing, IP addresses can be forged easily, thus, makes it difficult to filter illegitimate packets from legitimate one out of aggregated traffic. A number of mitigation techniques have been proposed in the literature by various researchers. The conventional Hop Count Filtering or probabilistic Hop Count Filtering based research work indicates the problems related to higher computational time and low detection rate of illegitimate packets. In this paper, DPHCF-RTT technique has been implemented and analysed for variable number of hops. Goal is to improve the limitations of Conventional HCF or Probabilistic HCF techniques by maximizing the detection rate of illegitimate packets and reducing the computation time. It is based on distributed probabilistic HCF using RTT. It has been used in an intermediate system. It has the advantage for resolving the problems of network bandwidth jam and host resources exhaustion. MATLAB 7 has been used for simulations. Mitigation of DDoS attacks have been done through DPHCF-RTT technique. It has been shown a maximum detection rate up to 99% of malicious packets. © 2014 IEEE. Source


Sarybekova L.,Cairn Energy Plc | Parker J.G.,Parker Environment Ltd
Society of Petroleum Engineers - SPE Arctic and Extreme Environments Conference and Exhibition, AEE 2013 | Year: 2013

The hydrocarbon basins in the Arctic are thought to hold a significant proportion of the world's remaining undiscovered hydrocarbon reserves. Exploration in the region has been taking place for almost a century, with more that 500 wells drilled offshore and many thousands onshore, and will continue under the licence and invitation from sovereign governments. Yet there is a growing international interest in the various governance aspects of the Arctic and ever greater appreciation that its natural resources need to be developed with proper regard for the environmental and social settings. In addition to the stringent domestic legislation and international treaties, there are numerous forums for bringing together the policy makers, indigenous people and scientists to develop a common understanding of Arctic matters and ensure that oil and gas exploration in the region is done safely. The International Oil & Gas Producers Association (OGP), its partners and individual member companies are committed to improving the industry's performance and have actively contributed to the development of industry standards for protecting the Arctic environment, both offshore and onshore. Recognising recent advances in design, technology and operational practice, OGP has updated and strengthened its existing guidelines in a consolidated Arctic Environment Good Practice Guide (Arctic GPG or the Guide). The Guide provides essential information on the oil and gas interests in the Arctic and the challenges faced by operators; it describes the legislative and governance frameworks across the Arctic nations and the role of the peoples of the Arctic; it provides generic descriptions of the physical and biological environment of both onshore and offshore, including the sensitivities to development. It examines potential environmental impacts of oil and gas developments and the mitigation measures that are normally adopted. The Guide is written mostly for Arctic operations, but may include relevant management practices for the use in other similar environments. Copyright 2013, Society of Petroleum Engineers. Source


Nelson C.E.,Cairn Energy Plc | Jerram D.A.,University of Oslo | Jerram D.A.,DougalEARTH Ltd. | Jerram D.A.,Queensland University of Technology | And 3 more authors.
Marine and Petroleum Geology | Year: 2015

New data are presented on the offshore part of the West Greenland volcanic succession, part of the North Atlantic Igneous Province located in southern Baffin Bay. The data were obtained from the Delta-1 hydrocarbon exploration well, drilled by Cairn Energy in 2011. Wireline log data were collected over the drilled section, providing information on the physical volcanology of the volcanic succession, and 23 sidewall cores were analysed for their geochemical composition. The well encountered 65 lava flows with a well-developed core and crust signature, typical for sub-aerial eruptions. Major and trace element data showed a good correlation with parts of the succession onshore West Greenland. The XRF major and trace element data allowed careful picking of samples for 40Ar/39Ar dating, and the main part of the sequence was found to be early Eocene in age. This coincides with the second main phase of volcanism in onshore West Greenland and is likely to be linked to the change in the tectonic regime in Baffin Bay at this time. This finding substantially expands the area of West Greenland affected by volcanism during the Eocene. © 2015 Elsevier Ltd. Source

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