scholarly journals Taxonomic distinctness as a measure of diversity applied over a large scale: the benthos of the Norwegian continental shelf

2005 ◽  
Vol 74 (6) ◽  
pp. 1069-1079 ◽  
Author(s):  
K. E. ELLINGSEN ◽  
K. R. CLARKE ◽  
P. J. SOMERFIELD ◽  
R. M. WARWICK
Keyword(s):  
Continental Shelf ◽  
Large Scale ◽  
Taxonomic Distinctness ◽  
Norwegian Continental Shelf

Protection of Caprock Integrity for Large-Scale CO2 Storage on the Norwegian Continental Shelf

2019 ◽  
Author(s):  
Sarah Gasda ◽  
Ivar Aavatsmark ◽  
Bahman Bohloli ◽  
Helge Hellevang ◽  
Jan Nordbotten ◽  
...  
Keyword(s):  
Continental Shelf ◽  
Large Scale ◽  
Co2 Storage ◽  
Caprock Integrity ◽  
Norwegian Continental Shelf

Improving Oil Spill Response capability during times of downsizing and budget cuts: A glance at the Norwegian way

2017 ◽  
Vol 2017 (1) ◽  
pp. 2726-2742
Author(s):  
Ståle Jensen
Keyword(s):  
Continental Shelf ◽  
Oil Spill ◽  
Emergency Preparedness ◽  
Large Scale ◽  
Petroleum Industry ◽  
Strategic Choices ◽  
Budget Cuts ◽  
Incident Command ◽  
Oil Spill Response ◽  
Norwegian Continental Shelf

ABSTRACT How can we continuously develop and improve large scale emergency preparedness, such as oil spill response, in times of low oil prices, budget cuts and downsizing? NOFO (Norwegian Clean Seas Association For Operating Companies) has found its path, through modernization and cooperation. When there are spills of crude oil from the petroleum industry at the Norwegian Continental Shelf (NCS) NOFO will perform the oil spill response (OSR) on behalf of the owner of the spill, in practical terms becoming the company’s OSR branch during the incident. NOFO was founded in 1978, as a response to the large blowout at the Bravo field the previous year. Focus on offshore OSR technology and combat strategies has been the main motivation during our almost 40 year’s existence. The last decade has included a significant improvement in our competence and training on near-shore and beach OSR, simultaneously maintaining the unique offshore segment. As part of improving NOFO capacity within large scale, and / or long duration spill situations (e.g. Macondo), NOFO have embraced and implemented ICS (Incident Command System), thus improving our capabilities and capacities through the whole range from offshore to shoreline OSR. Through 2015 and 2016 ICS training and ICS adaptions of previous organizational systems has been prioritized, and new ones have been developed. NOFO personnel have participated in numerous training sessions and exercises with our member companies (operators on the Norwegian continental shelf) nationally and internationally. Through strategic choices of planning and collaboration both internally in NOFO and between NOFO and the Norwegian Coastal Administration (NCA), Global Response Network (GRN), other oil spill Response Organizations (OSROs) and cooperating partners, the number of exercises has increased, the value and output of exercises is improved, and thus the capacity and capability of NOFOs whole range OSR in improved. At the same time, on behalf of our members, NOFO have consumed less money year after year. NOFO is developing and improving our proven OSR capacity and competence, from offshore to shoreline, through increased efficiency, high focus on exercise training, and cooperation with other OSR agencies.

scholarly journals Long-term Behavior of CO2 Stored on a Large Scale in the Utsira Formation, the North Sea, Norwegian Continental Shelf

2013 ◽  
Vol 37 ◽  
pp. 5240-5247
Author(s):  
V.T.H. Pham ◽  
E.K. Halland ◽  
I.M. Tappel ◽  
I.T. Gjeldvik ◽  
F. Riis ◽  
...  
Keyword(s):  
Continental Shelf ◽  
North Sea ◽  
Large Scale ◽  
The North ◽  
The North Sea ◽  
Long Term Behavior ◽  
Norwegian Continental Shelf

Large scale distrlbution of acoustical scattering layers at the Norwegian continental shelf and the Eastern Norwegian Sea

Sarsia ◽  
1997 ◽  
Vol 82 (2) ◽  
pp. 87-96 ◽  
Author(s):  
Thomas Torgersen ◽  
Stein Kaartvedt ◽  
Webjørn Melle ◽  
Tor Knutsen
Keyword(s):  
Continental Shelf ◽  
Large Scale ◽  
Norwegian Sea ◽  
Norwegian Continental Shelf

scholarly journals Offshore wind power intermittency: The effect of connecting production sites along the Norwegian continental shelf

2020 ◽  
Author(s):  
Ida Marie Solbrekke ◽  
Nils Gunnar Kvamstø ◽  
Asgeir Sorteberg
Keyword(s):  
Wind Speed ◽  
Continental Shelf ◽  
Wind Power ◽  
Large Scale ◽  
Power Production ◽  
Offshore Wind ◽  
Pressure System ◽  
Electricity Grid ◽  
Offshore Wind Power ◽  
Norwegian Continental Shelf

Abstract. This study uses a unique set of hourly wind speed data observed over a period of 16 years to quantify the potential of collective offshore wind power production. We address the well-known intermittency problem of wind power for five locations along the Norwegian continental shelf. Mitigation of wind power intermittency is investigated using a hypothetical electricity grid. The degree of mitigation is examined by connecting different configurations of the sites. Along with the wind power smoothing effect, we explore the risk probability of the occurrence and duration of wind power shut-down. Typical large-scale atmospheric situations resulting in long term shut-down periods are identified. We find that both the wind power variability and the risk of not producing any wind power decrease significantly with an increasing array of connected sites. The risk of no wind power production for a given hour is reduced from 10 % for a single site to under 4 % for two sites. Increasing the array-size further reduces the risk, but to a lesser extend. The average atmospheric weather pattern resulting in wind speed that is too low (too high) to produce wind power is associated with a high- (low-) pressure system near the production sites.

Application of LWD Multipole Sonic for Quantitative Cement Evaluation – Well Integrity in the Norwegian Continental Shelf

2021 ◽  
Author(s):  
Subhadeep Sarkar ◽  
Mathias Horstmann ◽  
Tore Oian ◽  
Piotr Byrski ◽  
George Lawrence ◽  
...  
Keyword(s):  
Continental Shelf ◽  
Time Window ◽  
Full Range ◽  
Hybrid Approach ◽  
Bond Quality ◽  
Bond Index ◽  
Early Evaluation ◽  
Well Integrity ◽  
Wide Range ◽  
Norwegian Continental Shelf

Abstract One of the crucial components of well integrity evaluation in offshore drilling is to determine the cement bond quality assuring proper hydraulic sealing. On the Norwegian Continental Shelf (NCS) an industry standard as informative reference imposes verification of cement length and potential barriers using bonding logs. Traditionally, for the last 50 years, wireline (WL) sonic tools have been extensively used for this purpose. However, the applicability of logging-while-drilling (LWD) sonic tools for quantitative cement evaluation was explored in the recent development drilling campaign on the Dvalin Field in the Norwegian Sea, owing to significant advantages on operational efficiency and tool conveyance in any well trajectory. Cement bond evaluation from conventional peak-to-peak amplitude method has shown robust results up to bond indexes of 0.6 for LWD sonic tools. Above this limit, the casing signal is smaller than the collar signal and the amplitude method loses sensitivity to bonding. This practical challenge in the LWD realm was overcome through the inclusion of attenuation rate measurements, which responds accordingly in higher bonding environments. The two methods are used in a hybrid approach providing a full range quantitative bond index (QBI) introduced by Izuhara et al. (2017). In order to conform with local requirements related to well integrity and to ascertain the QBI potential from LWD monopole sonic, a wireline cement bond log (CBL) was acquired in the first well of the campaign for comparison. This enabled the strategic deployment of LWD QBI service in subsequent wells. LWD sonic monopole data was acquired at a controlled speed of 900ft/h. The high-fidelity waveforms were analyzed in a suitable time window and both amplitude- and attenuation-based bond indexes were derived. The combined hybrid bond index showed an excellent match with the wireline reference CBL, both in zones of high as well as lower cement bonding. The presence of formation arrivals was also in good correlation with zones of proper bonding distinguishable on the QBI results. This established the robustness of the LWD cement logging and ensured its applicability in the rest of the campaign which was carried out successfully. While the results from LWD cement evaluation service are omnidirectional, it comes with a wide range of benefits related to rig cost or conveyance in tough borehole trajectories. Early evaluation of cement quality by LWD sonic tools helps to provide adequate time for taking remedial actions if necessary. The LWD sonic as part of the drilling BHA enables this acquisition and service in non-dedicated runs, with the possibility of multiple passes for observing time-lapse effects. Also, the large sizes of LWD tools relative to the wellbore ensures a lower signal attenuation in the annulus and more effective stabilization, thereby providing a reliable bond index.

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