Successful Real Time Instrumentation Of The Conductor And Surface Casing Of An Exploration Subsea Well In The North Sea To Measure The Actual Loads Experienced During Drilling Operations

2015 ◽  
Author(s):  
Erling Myhre ◽  
Lasse Eskil Eilertsen ◽  
Massimiliano Russo ◽  
Frank Johansen ◽  
Chris Hart ◽  
...  
Keyword(s):  
Real Time ◽  
North Sea ◽  
The North ◽  
Drilling Operations ◽  
The North Sea

scholarly journals Depth-averaged instantaneous currents in a tidally dominated shelf sea from glider observations

2016 ◽  
Author(s):  
Lucas Merckelbach
Keyword(s):  
Real Time ◽  
North Sea ◽  
Current Data ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Real Time Mode ◽  
The North ◽  
Shelf Sea ◽  
The North Sea ◽  
Better Than

Abstract. Ocean gliders have become ubiquitous observation platforms in the ocean in recent years. They are also increasingly used in coastal environments. The coastal observatory system COSYNA has pioneered the use of gliders in the North Sea, a shallow tidally energetic shelf sea. For operational reasons, the gliders operated in the North Sea are programmed to resurface every 3–5 hours. The glider's deadreckoning algorithm yields depth averaged currents, averaged in time over each subsurface interval. Under operational conditions these averaged currents are a poor approximation of the instantaneous tidal current. In this work an algorithm is developed that estimates the instantaneous current (tidal and residual) from glider observations only. The algorithm uses a second-order Butterworth low-pass filter to estimate the residual current component, and a Kalman filter based on the linear shallow water equations for the tidal component. A comparison of data from a glider experiment with current data from an ADCP deployed nearby shows that the standard deviations for the east and north current components are better than 7 cm s−1 in near-real time mode, and improve to better than 5 cm s−1 in delayed mode, where the filters can be run forward and backward. In the near-real time mode the algorithm provides estimates of the currents that the glider is expected to encounter during its next few dives. Combined with a behavioural and dynamic model of the glider, this yields predicted trajectories, the information of which is incorporated in warning messages issued to ships by the (German) authorities. In delayed mode the algorithm produces useful estimates of the depth averaged currents, which can be used in (process-based) analyses in case no other source of measured current information is available.

scholarly journals Depth-averaged instantaneous currents in a tidally dominated shelf sea from glider observations

2016 ◽  
Vol 13 (24) ◽  
pp. 6637-6649 ◽  
Author(s):  
Lucas Merckelbach
Keyword(s):  
Real Time ◽  
North Sea ◽  
Current Data ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Real Time Mode ◽  
The North ◽  
Shelf Sea ◽  
The North Sea ◽  
Better Than

Abstract. Ocean gliders have become ubiquitous observation platforms in the ocean in recent years. They are also increasingly used in coastal environments. The coastal observatory system COSYNA has pioneered the use of gliders in the North Sea, a shallow tidally energetic shelf sea. For operational reasons, the gliders operated in the North Sea are programmed to resurface every 3–5 h. The glider's dead-reckoning algorithm yields depth-averaged currents, averaged in time over each subsurface interval. Under operational conditions these averaged currents are a poor approximation of the instantaneous tidal current. In this work an algorithm is developed that estimates the instantaneous current (tidal and residual) from glider observations only. The algorithm uses a first-order Butterworth low pass filter to estimate the residual current component, and a Kalman filter based on the linear shallow water equations for the tidal component. A comparison of data from a glider experiment with current data from an acoustic Doppler current profilers deployed nearby shows that the standard deviations for the east and north current components are better than 7 cm s−1 in near-real-time mode and improve to better than 6 cm s−1 in delayed mode, where the filters can be run forward and backward. In the near-real-time mode the algorithm provides estimates of the currents that the glider is expected to encounter during its next few dives. Combined with a behavioural and dynamic model of the glider, this yields predicted trajectories, the information of which is incorporated in warning messages issued to ships by the (German) authorities. In delayed mode the algorithm produces useful estimates of the depth-averaged currents, which can be used in (process-based) analyses in case no other source of measured current information is available.

Automation of Mud-Pump Management: Application to Drilling Operations in the North Sea

2011 ◽  
Vol 26 (01) ◽  
pp. 41-51 ◽  
Author(s):  
Eric Cayeux ◽  
Benoît Daireaux ◽  
Erik Dvergsnes
Keyword(s):  
North Sea ◽  
The North ◽  
Management Application ◽  
Drilling Operations ◽  
The North Sea

Real-time microseismic monitoring in the North Sea with advanced noise removal methods

2016 ◽  
Author(s):  
Ben Dando ◽  
Kamran Iranpour ◽  
Volker Oye ◽  
Sascha Bussat ◽  
Louise Bjerrum
Keyword(s):  
Real Time ◽  
North Sea ◽  
Noise Removal ◽  
Microseismic Monitoring ◽  
The North ◽  
The North Sea

Real-Time Geological Positioning of a Well in the North Sea

2001 ◽  
Author(s):  
Tom Schroeder ◽  
Paul Boonen ◽  
Herb Illfelder ◽  
Graham McElhinney ◽  
Gerhard Templeton
Keyword(s):  
Real Time ◽  
North Sea ◽  
The North ◽  
The North Sea

scholarly journals WATeRS: an open Web Map Service with near‐real time MODIS Level‐2 standard chlorophyll products of the North Sea

2007 ◽  
Vol 28 (16) ◽  
pp. 3693-3699
Author(s):  
M. A. Eleveld ◽  
A. J. Wagtendonk ◽  
R. Pasterkamp ◽  
N. O. de Reus
Keyword(s):  
Real Time ◽  
North Sea ◽  
Web Map ◽  
The North ◽  
The North Sea ◽  
Map Service ◽  
Level 2

Real-Time Quality Control of Wave Observations in the North Sea

1994 ◽  
Vol 11 (6) ◽  
pp. 1611-1624
Author(s):  
María Paula Etala ◽  
Gerrit Burgers
Keyword(s):  
Quality Control ◽  
Real Time ◽  
North Sea ◽  
The North ◽  
The North Sea
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