16
WEDNESDAY 14TH MARCH For full conference programme and abstracts, visit the Oceanology website.
OILANDGAS
CHAIRED BY: COLIN GRANT, ADVISOR & SETA – METOCEAN, BP – SUBSEA & FLOATING SYSTEMS UPSTREAM ENGINEERING CENTRE LOCATION: SOUTH GALLERY, ROOMS 3/4
AM SESSION
09:30– 10:00
10:00– 10:30
Keynote Address: The U.S. IOOS Response to the Gulf of Mexico Oil Spill: The Critical Role of Modern Ocean Observing Networks Dr Scott Glenn, Rutgers University
Gulf Of Mexico Deepwater Current Structure Observations
Andy Brown, CSA International Two Acoustic Doppler Current Profilers (ADCP’s) enable the collection of full water column, current profile data in approximately 1300 meters of water at Green Canyon Block 645 in the Gulf of Mexico. The seabed mounted 75kHz ADCP has recorded and displayed profiles in near real-time at 20 minutes intervals continuously (100% data return) from June 2005 to the present day. The data provides evidence on how deep water currents are affected by natural events such as hurricanes (Gustav, Ike, Katrina, Rita and Wilma) and various Loop Current eddies. These data also indicate the existence of a complex structure in the near-seabed region, and show energetic current pulses exceeding 25 cm/s with periodicities of approximately 20-day intervals. The possible mechanisms for these phenomena are discussed in this presentation.
10:30– 11:00
Survey of Experience with Integrated Metocean and Structural Integrity Monitoring on 25 Deepwater Floating Production Platforms
Tom Johnson, BMT SMS A technical description of environment, response and integrity monitoring systems that are currently deployed on floating production platforms offshore Brazil, West Africa, Malaysia and in the Gulf of Mexico is presented. The rationale for making each of the measurements and the measurement approach is described. The presentation summarizes the system capabilities, describes the measurements and sensors, as well as discussing the presentation of the real-time information to the production operators and the analysis options for the stored data collected by the systems. Selected, noteworthy, measurement technologies are discussed including: very high accuracy motion measurement systems for low motion platforms, high resolution/band width riser tension and bending moment sensing systems, tendon tension monitoring, Steel Catenary Riser (SCR) top static and dynamic response measurement, wave measurement from platforms and current profiling from the platforms. Shore-side networking with the offshore monitoring systems is also described, and automated daily reports and monthly reports from these platforms are presented.
Break & Exhibition
11:30– 12:00
Worldwide Internal Soliton Criteria
Gus Jeans, Director & Independent Metocean Consultant, Oceanalysis Ltd This paper describes a project to improve characterisation of internal soliton activity in regions of oil and gas activity worldwide. Solitons are the name commonly used to describe particularly large internal waves, associated with strong and rapidly varying currents. Soliton impact remains a potential hazard that needs to be identified in a number of frontier regions. Increasing levels of prediction and quantification are required to support later phases of field development. Solitons remain an operational hazard during the life of an offshore asset that would benefit from improved prediction in several regions.
12:00– 12:30
Surveys on sea ice - from an HSE perspective, the new OGP 447 guidelines
Rune Nilsen, Shell OGP have recently issued a new report No. 447 ‘HSE Guidelines for Metocean & Arctic Surveys’, building on OGP Report No. 348, and aimed at including guidance for survey work in cold climates, as more and more survey activities are taking place in Arctic and sub-Arctic regions. Some of this survey work may require placing personnel on the sea ice, introducing new aspects to the HSE requirements. The talk will provide an overview of the major additions in the new report relevant to conducting on-ice surveys, supported by examples on how these new elements of the guideline have evolved based on experiences from conducting fieldwork in the Arctic.
12:30– 14:00
Lunch & Exhibition PM SESSION
14:00– 14:30
The development of standards and guidelines for the use of satellite based ice information in the oil and gas sector
Kim Partington, Polar Imaging Ltd The development of standards and guidelines for the use of satellite based ice information in the oil and gas sector. The oil and gas industry are increasingly focusing their interests and activities on areas that are prone to ice cover, in the form of sea ice and icebergs. At present, the approach being taken by companies who require ice information is to develop their own internal practices based on different experiences.
No industry-wide standards exist. In this presentation, we provide a brief overview of existing requirements and practices for ice information within the industry and provide an introduction to a new project which aims to define minimum standards and best practices for the provision of ice information derived from satellites for companies operating in the polar and sub-polar regions.
14:30– 15:00
Coupled Modelling of the Caspian Sea
James Farley Nicholls, Imperial College We discuss the physical aspects of coupled ocean-wave-atmosphere modelling and present the COAWST model composed of the ROMS ocean, SWAN wave and WRF atmosphere models. The setup of our model on the Caspian Sea – the world’s largest enclosed body of water – is discussed and model results are used for validation. Model results with and without coupling of the component models are compared, allowing some conclusions on the importance of this integrated coupling to be made and elements which need further investigation are highlighted.
Break & Exhibition
15:30– 16:00
Ocean radar to monitor sea currents for offshore structures – West Africa Project
Laurent Vigier, Actimar The HF ocean radars are remote sensing systems using the over the horizon radar technology to monitor ocean surface currents, wave height and wind direction. This monitoring system can acquire data over areas of several hundreds of square kilometres. Depending on operating frequency, data resolution can vary from 300m to 3 km and ranges from 60 to 200 km. The provided ocean current data can be used to calibrate and validate the hydrodynamic numerical models, or to improve the forecast positions of drifting objects, including oil spills. In order to improve the knowledge of the sea surface current regime in the offshore domain between Congo and North Angola, it is proposed to install HF radars at selected locations along the coast. The installation will then allow to monitor currents over existing production fields and to better understand the influence of the Congo River.
16:00– 16:30
Satellite Monitoring During Drilling of the Zaedeus Exploration Well Offshore French Guana
Martin Insley, Tullow Oil This paper provides a summary of a nine month satellite monitoring programme provided by Kongsberg Satellite Services (KSAT) of Tullow Oil’s exploration drilling of the Zaedeus well in the Guiane Maritime License offshore French Guiana. The monitoring programme involved the acquisition of radar images every 1-3 days and Quickbird optical imagery every 7 days depending on cloud-cover. The performance of the individual satellites and respective data providers, as well as contrasting image characteristics depending on data type i.e. wavelength, incidence angle, beam mode and spatial resolution are reviewed. The project included acquisition of 117 radar images and 16 optical images and provides an important baseline from which to evaluate the application of the service.
16:30– 17:00
Satellite ocean front maps reveal dynamic surface currents: improved metocean for offshore oil and gas
Peter Miller, Remote Sensing Group, Plymouth Marine Laboratory We have developed novel Earth observation (EO) methods for visualising and inferring the spatio-temporal distribution of dynamic oceanic fronts, in order to provide additional information on physical oceanography pertinent to the offshore oil and gas industry. For instance, this analysis may reveal if there is more eddy activity at particular locations or times of year, or predictable seasonal changes in the width of the slope current. EO front maps from a 30-year time-series can be integrated with other metocean information, for instance current meters or ADCP that reveal physical processes at depth but are restricted to small regions and limited time span. Examples will be shown for regions of interest to oil and gas industry, such as the Faroe-Shetland Channel and the Gulf of Mexico.
17:00 Programmes may be subject to change. Close
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