The Gryphon, Maclure, Tullich and Ballindalloch fields, Blocks 9/18b, 9/18c, 9/19a, 9/23d and 9/24e, UK North Sea

2020 ◽  
Vol 52 (1) ◽  
pp. 837-849 ◽  
Author(s):  
F. Pelletier ◽  
C. Gunn
Keyword(s):  
North Sea ◽  
Seismic Data ◽  
Oil Production ◽  
Production Data ◽  
Final Phase ◽  
Submarine Fan ◽  
Initial Development ◽  
The North ◽  
Early Tertiary ◽  
The North Sea

AbstractThe Gryphon Field was discovered in 1987 in Quadrant 9 in the Beryl Embayment. Oil was encountered in a thick Balder Formation sandstone, and the reservoir was interpreted as lobes of a submarine fan system, such as many of the prolific early Tertiary fields in the North Sea. After an extensive appraisal phase, oil production started in 1993 through the Gryphon floating production, storage and offloading vessel.After a successful initial development phase, the integration of production data, improved and regularly acquired seismic data, and a better geological understanding resulted in the identification of sandstone intrusions. These have since been interpreted to form a volumetrically significant part of the Gryphon reservoir. The drilling of further infill wells, and the development of satellite fields Maclure, Tullich and the future Ballindalloch, ensued from this change to the geological model. To date, the Gryphon, Maclure and Tullich fields have produced more than 200 MMbbl of oil compared to an initial reserve estimate of 151 MMbbl.Although the current and mid-term focus remains on maximizing oil production, the final phase of the wider Gryphon area fields’ development should see the production of the regional gas cap.

Seabirds associated with oil production platforms in the North Sea

1986 ◽  
Vol 7 (1) ◽  
pp. 7-14 ◽  
Author(s):  
Mark L. Tasker ◽  
Peter Hope Jones ◽  
Barry F. Blake ◽  
Tim J. Dixon ◽  
Andrew W. Wallis
Keyword(s):  
North Sea ◽  
Oil Production ◽  
The North ◽  
The North Sea

Quaternary evolution of the northern North Sea

2020 ◽  
Author(s):  
Christine Batchelor ◽  
Dag Ottesen ◽  
Benjamin Bellwald ◽  
Sverre Planke ◽  
Helge Løseth ◽  
...  
Keyword(s):  
North Sea ◽  
Seismic Data ◽  
3D Seismic ◽  
Quaternary Sediments ◽  
The North ◽  
The North Sea ◽  
Data Coverage ◽  
Northern North Sea ◽  
2D And 3D ◽  
3D Seismic Data

<p>The North Sea has arguably the most extensive geophysical data coverage of any glacier-influenced sedimentary regime on Earth, enabling detailed investigation of the thick (up to 1 km) sequence of Quaternary sediments that is preserved within the North Sea Basin. At the start of the Quaternary, the bathymetry of the northern North Sea was dominated by a deep depression that provided accommodation for sediment input from the Norwegian mainland and the East Shetland Platform. Here we use an extensive database of 2D and 3D seismic data to investigate the geological development of the northern North Sea through the Quaternary.</p><p>Three main sedimentary processes were dominant within the northern North Sea during the early Quaternary: 1) the delivery and associated basinward transfer of glacier-derived sediments from an ice mass centred over mainland Norway; 2) the delivery of fluvio-deltaic sediments from the East Shetland Platform; and 3) contourite deposition and the reworking of sediments by contour currents. The infilling of the North Sea Basin during the early Quaternary increased the width and reduced the water depth of the continental shelf, facilitating the initiation of the Norwegian Channel Ice Stream.</p>

High-resolution reservoir characterization by an acoustic impedance inversion of a Tertiary deltaic clinoform system in the North Sea

Geophysics ◽  
2010 ◽  
Vol 75 (6) ◽  
pp. O57-O67 ◽  
Author(s):  
Daria Tetyukhina ◽  
Lucas J. van Vliet ◽  
Stefan M. Luthi ◽  
Kees Wapenaar
Keyword(s):  
North Sea ◽  
Seismic Data ◽  
Reservoir Characterization ◽  
Structural Information ◽  
Sampling Rate ◽  
Seismic Inversion ◽  
Acoustic Properties ◽  
The North ◽  
The North Sea ◽  
Well Data

Fluvio-deltaic sedimentary systems are of great interest for explorationists because they can form prolific hydrocarbon plays. However, they are also among the most complex and heterogeneous ones encountered in the subsurface, and potential reservoir units are often close to or below seismic resolution. For seismic inversion, it is therefore important to integrate the seismic data with higher resolution constraints obtained from well logs, whereby not only the acoustic properties are used but also the detailed layering characteristics. We have applied two inversion approaches for poststack, time-migrated seismic data to a clinoform sequence in the North Sea. Both methods are recursive trace-based techniques that use well data as a priori constraints but differ in the way they incorporate structural information. One method uses a discrete layer model from the well that is propagated laterally along the clinoform layers, which are modeled as sigmoids. The second method uses a constant sampling rate from the well data and uses horizontal and vertical regularization parameters for lateral propagation. The first method has a low level of parameterization embedded in a geologic framework and is computationally fast. The second method has a much higher degree of parameterization but is flexible enough to detect deviations in the geologic settings of the reservoir; however, there is no explicit geologic significance and the method is computationally much less efficient. Forward seismic modeling of the two inversion results indicates a good match of both methods with the actual seismic data.

scholarly journals THE ROLE OF THE NORTH SEA OIL RESOURCES IN NORWAY’S ECONOMY

2015 ◽  
pp. 263-270
Author(s):  
D. A. Talagaeva ◽  
A. A. Trashchenko
Keyword(s):  
North Sea ◽  
Service Sector ◽  
Oil Production ◽  
The Arctic ◽  
The North ◽  
Oil Resources ◽  
The North Sea ◽  
Oil Revenues ◽  
State Revenues

Today Norway is a highly developed country with a predominantly service sector in the economic structure. However, oil continues to play a major role in the life of the state and society as one third of state revenues is based on oil resources, while export of raw materials totals more than a half of the country's overall export. However, it is not quite possible to cover the entire oil sector in Norway within the scope of one piece of work due to the differences in the characteristics of each of the three sources of the country's oil. In this context, the resources of the Norwegian and Barents Seas are associated with the problems of the Arctic and the Arctic law. At the same time, the North Sea is the most regulated area, besides it is the so called "homeland" of the oil production in Norway. Thus, this paper analyzes the role of the North Sea oil in the economy of Norway, which is the basis of its economic prosperity. Due to its oil revenues, Norway was once able to build a welfare state. Also the unique system of accumulation of oil revenues, which is reflected in the functioning of the Government Pension Fund of Norway, is a relevant issue as well. The article deals with the emergence of the oil industry in the country from a historical perspective, and analyzes its current state, including a detailed analysis of the existing fields and pipelines. Furthermore, the authors propose the estimation of state revenues from the oil production in the North Sea.

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