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Dehra Dun, India

Oil and Natural Gas Corporation Limited is an Indian multinational oil and gas company headquartered in Dehradun, India. It is a Public Sector Undertaking of the Government of India, under the administrative control of the Ministry of Petroleum and Natural Gas. It is India's largest oil and gas exploration and production company. It produces around 69% of India's crude oil and around 62% of its natural gas.On 31 March 2013, its market capitalisation was INR 2.6 trillion , making it India's second largest publicly traded company. In a government survey for FY 2011-12, it was ranked as the largest profit making PSU in India. ONGC has been ranked 357th in the Fortune Global 500 list of the world's biggest corporations for the year 2012. It is ranked 22nd among the Top 250 Global Energy Companies by Platts.ONGC was founded on 14 August 1956 by Government of India, which currently holds a 69.23% equity stake. It is involved in exploring for and exploiting hydrocarbons in 26 sedimentary basins of India, and owns and operates over 11,000 kilometers of pipelines in the country. Its international subsidiary ONGC Videsh currently has projects in 15 countries. ONGC has discovered 6 of the 7 commercially-producing Indian Basins, in the last 50 years, adding over 7.1 billion tonnes of In-place Oil & Gas volume of hydrocarbons in Indian basins. Against a global decline of production from matured fields, ONGC has maintained production from its brownfields like Mumbai High, with the help of aggressive investments in various IOR and EOR schemes. ONGC has many matured fields with a current recovery factor of 25-33%. Its Reserve Replacement Ratio for between 2005 and 2013, has been more than one. During FY 2012-13, ONGC had to share the highest ever under-recovery of INR 494.2 million towards the under-recoveries of Oil Marketing Companies . Wikipedia.

Andreu B.,University Paul Sabatier | Colin J.-P.,Impasse des Biroulayres | Colin J.-P.,University of Lisbon | Singh J.,Oil and Natural Gas Corporation
Gondwana Research

This paper presents a study of the Middle and Upper Jurassic Ostracods from Western Kachchh, India. The first part discusses the biochronological importance of the Ostracod assemblages, while the second part reports the paleobiogeographical results.Benthic foraminiferal biozones are used to calibrate the biostratigraphical distribution of ostracod species and genera from sections in the Aalenian-Tithonian interval located in Western Kachchh (or Kutch) (Mundham Anticline, Jumara Dome, Jhurio Dome and Habo Dome) and on Pachchham Island (Khavda Nala), Gujarat, India. A total of 71 species are listed, including 32 previously published species and 38 species in open nomenclature, belonging to 23 genera. The ostracod assemblages indicate that faunal communication was first established during the Bathonian and Callovian (Middle Jurassic) and continued until the early Cretaceous. These faunal exchanges occurred between Laurasia (USA, Europe, Russia and Siberia) and the Indo-East African Province, extending along the Western Tethyan carbonate shelves (bordering West and East Gondwana) through to the Pacific Ocean margin of West Gondwana. © 2012 International Association for Gondwana Research. Source

Leger R.M.,Louisiana State University | Leger R.M.,University of Tennessee at Knoxville | Webb A.A.G.,Louisiana State University | Henry D.J.,Louisiana State University | And 2 more authors.

New constraints on pressures and temperatures experienced by rocks of the Himachal Himalaya are presented in order to test models for the emplacement of the Himalayan crystalline core here. A variety of methods were employed: petrographic analysis referenced to a petrogenetic grid, exchange and net-transfer thermobarometry, Ti-in-biotite thermometry, and analysis of quartz recrystallization textures. Rocks along three transects (the northern Beas, Pabbar, and southern Beas transects) were investigated. Results reveal spatially coherent metamorphic field gradients across amphibolite-grade and migmatitic metamorphic rocks. Along the northern Beas transect, rocks record peak temperatures of ∼650-780°C at low elevations to the north of ∼32°10' N; rocks in other structural positions along this transect record peak temperatures of <640°C that decrease with increasing structural elevation. Rocks of the Pabbar transect dominantly record ∼650-700°C peak temperatures to the east of ∼77°55' E and ∼450-620°C peak temperatures farther west. Peak temperatures of ∼450-600°C along the southern Beas transect record a right-way-up metamorphic field gradient. Results are integrated with literature data to determine a metamorphic isograd map of the Himachal Himalaya. This map is compared to metamorphic isograd map pattern predictions of different models for Himalayan crystalline core emplacement. This analysis excludes models involving large magnitude (>20-30 km) extrusion and permits (1) models involving small magnitude (<20-30 km) extrusion that is discontinuous along the orogen and (2) tectonic wedging models, in which the crystalline core was emplaced at depth between a sole thrust and a back thrust in the Early-Middle Miocene. © 2013. American Geophysical Union. All Rights Reserved. Source

Ram J.,Oil and Natural Gas Corporation
Geological Society Special Publication

The burgeoning oil and gas consumption in India in recent years has necessitated looking into the Proterozoic basins of India, which are sparsely explored and have a scanty knowledge base. The rationale for hydrocarbon exploration in Indian Proterozoic basins is derived from the fact that they have large basinal areas, wide geographical distribution, varied geotectonic setting and sedimentary fill. The favourable tectonic settings of these basins, pronounced biological activity, known hydrocarbon gas seepages, and subsurface commercially viable oil and gas shows in the Bikaner-Nagaur and Vindhyan basins and analogous basins throughout the world necessitate proactive exploration strategies in these basins. The basins of Bikaner-Nagaur, Vindhyan, Cuddapah and Chhatishgarh include thick Neoproterozoic/basal Lower Palaeozoic (Cambrian) successions, in addition to Palaeoproterozoic and Mesoproterozoic sequences. The Neoproterozic sediments in these basins incorporate thick successions of shale, limestone and sandstone. These successions have rich organic matter of high-quality cyanophycean (stromatolites, acritarchs and filamentous algae) affinity that is proven to be high-quality (type one) source material for hydrocarbon generation and also involved in later structurization. However, the Neoproterozoic sedimentary pack in the Bhima-Kaladgi basins is comparatively less thick, and appears to have less prospectivity. The available geological and source-rock data are reassessed for their hydrocarbon prospectivity in order to help in planning a strategy for exploration in these basins. © The Geological Society of London 2012. Source

Dakwala M.,Oil and Natural Gas Corporation | Mohanty B.,Indian Institute of Technology Roorkee | Bhargava R.,Indian Institute of Technology Roorkee
Journal of Cleaner Production

This paper represents a systematic approach for the synthesis of re-circulating cooling water systems consisting of a cooler network and a cooling tower network of a float glass process industry. A unique combination of graphical and mathematical programming technique of water pinch was used to revamp the existing water and energy network. Total nine different types of methods including Aspen Water used to develop nine different integrated water and energy networks with a payback period of around 8-11 months which clearly reflects that all the WENs are techno-commercially viable. There will be a reduction in consumption of makeup water in tune of 15-65% and savings in energy will be around 34-52%. There will be an overall reduction of 13-35% in terms of cost. © 2014 Elsevier Ltd. All rights reserved. Source

Das S.,Indian Institute of Science | Narayanan G.,Indian Institute of Science | Pandey M.,Oil and Natural Gas Corporation
IEEE Transactions on Power Electronics

Novel switching sequences have been proposed recently for a neutral-point-clamped three-level inverter, controlled effectively as an equivalent two-level inverter. It is shown that the four novel sequences can be grouped into two pairs of sequences. Using each pair of sequences, a hybrid pulsewidth modulation (PWM) technique is proposed, which deploys the two sequences in appropriate spatial regions to reduce the current ripple. Further, a third hybrid PWM technique is proposed which uses all the five sequences (including the conventional sequence) in appropriate spatial regions. Each proposed hybrid PWM is shown, both analytically and experimentally, to outperform its constituent PWM methods in terms of harmonic distortion. In particular, the third proposed hybrid PWM reduces the total harmonic distortion considerably at low- and high-speed ranges of a constant volts-per-hertz induction motor drive, compared to centered space vector PWM. © 2013 IEEE. Source

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