Conductive faults and sealing fractures in the West Sole gas fields, southern North Sea

2007 ◽  
Vol 292 (1) ◽  
pp. 431-451 ◽  
Author(s):  
D. Barr
Keyword(s):  
North Sea ◽  
The West ◽  
Southern North Sea ◽  
Gas Fields

The Sean North and Sean South Fields, Block 49/25a, UK North Sea

1991 ◽  
Vol 14 (1) ◽  
pp. 485-490 ◽  
Keyword(s):  
North Sea ◽  
Material Balance ◽  
The Other ◽  
Peak Shaving ◽  
Southern North Sea ◽  
Recoverable Reserves ◽  
Cap Rock ◽  
Sandstone Reservoir ◽  
Gas Fields

AbstractSean North and Sean South are two small prolific gas fields located on the Indefatigable Shelf in the Southern North Sea. They, like most of the other fields in the area, have a Carboniferous source, a Rotliegend aeolian sandstone reservoir and a Zechstein evaporite cap rock. They have been developed to fullfil a peak-shaving role, being produced for only a few days per year in times of high gas demand when they produce at a rate of 600 MMSCFD. Initially thought to be two equally sized accumulations, there is now some evidence from material balance calculations that the Sean South is bigger than North Sean. The contractual recoverable reserves for the two fields are 425 BCF.

Benthic regions within the North Sea

1983 ◽  
Vol 63 (3) ◽  
pp. 683-693 ◽  
Author(s):  
M. F. Dyer ◽  
W. G. Fry ◽  
P. D. Fry ◽  
G. J. Cranmer
Keyword(s):  
North Sea ◽  
Benthic Invertebrates ◽  
The West ◽  
Classification Analysis ◽  
Faunal Assemblages ◽  
Southern North Sea ◽  
The North ◽  
Factors Influencing ◽  
The North Sea ◽  
Northern North Sea

During five annual ground fish surveys of the North Sea, all the benthic invertebrates trawled at 48 primary stations were recorded. The data were subjected to classification analysis, which showed a basic division between northern and southern North Sea benthos. The southern North Sea was further divided into three benthic regions, and the northern North Sea into four benthic regions (including one to the west of Shetland). The factors influencing the faunal assemblages in the various regions were discussed.

Flavour and hydrocarbon assessment of fish from gas fields in the Southern North Sea

1990 ◽  
Vol 6 (4) ◽  
pp. 263-277 ◽  
Author(s):  
J.G. Parker ◽  
P. Howgate ◽  
P.R. Mackie ◽  
A.S. McGill
Keyword(s):  
North Sea ◽  
Southern North Sea ◽  
Gas Fields

Crustal structure of the London–Brabant Massif, southern North Sea

1993 ◽  
Vol 130 (5) ◽  
pp. 569-574 ◽  
Author(s):  
Richard Rijkers ◽  
Ed Duin ◽  
Michiel Dusar ◽  
Vital Langenaeker
Keyword(s):  
North Sea ◽  
The West ◽  
Seismic Line ◽  
Southern Limit ◽  
Northern Margin ◽  
Southern North Sea ◽  
The North ◽  
Seismic Sections ◽  
Fault Belt ◽  
Lower Crustal

AbstractIn 1991 a deep seismic line, MPNI-9101, was acquired in the southern North Sea. The line runs from the Mesozoic Broad Fourteens Basin in the north, across the West Netherlands Basin, onto the London–Brabant Massif in the south. The London–Brabant Massif is a WNW–ESE trending stable structure located beneath southeastern England, the southern North Sea and Belgium. The London–Brabant Massif represents the most easterly part of the Anglo-Brabant Massif. At the northern margin of the London-Brabant Massif, Devonian and Carboniferous siliciclastic and carbonate rocks onlap the massif. Farther south, shallow parts of the seismic line in the vicinity of the axial zone of the London–Brabant Massif are almost completely devoid of primary reflections. This zone is composed of strongly folded Lower Palaeozoic sedimentary units which have been mapped in the onshore part of Belgium. Numerous seismic reflection multiples from the base of the Cretaceous are observed on this part of the section. The southern limit of the zone is very abrupt and may correspond to a fault belt delimiting an area of magmatic rocks known in the onshore part of Belgium. Unusually the deeper parts of the seismic line show a strongly reflective lower crust beneath the London-Brabant, a phenomenon which has not been observed on other deep seismic sections across the massif. Two-way travel times to the base of the lower crustal reflective zone (corresponding to the Moho), increase from 10 seconds beneath the West Netherlands Basin in the north to 12 seconds beneath the London–Brabant Massif, suggesting a thickening of the crust.

scholarly journals On the Value of Certain Plankton Animals as Indicators of Water Movements in the English Channel and North Sea

1935 ◽  
Vol 20 (2) ◽  
pp. 309-332 ◽  
Author(s):  
F. S. Russell
Keyword(s):  
North Sea ◽  
Atlantic Water ◽  
English Channel ◽  
The West ◽  
Southern North Sea ◽  
The North ◽  
Channel Water ◽  
The North Sea ◽  
Apparent Influence ◽  
Neritic Species

The possibility that certain plankton organisms retained by a stramin net may prove of value as indicators in elucidating the water movements at the mouth of the English Channel is shown.The water populated by Sagitta setosa is shown to be clearly demarked from that in which S. elegans lives, the latter living to the west of the Channel mouth south of Ireland. The water in which S. elegans lives has here been called “western” water.It is shown that the planktonic indicators for “western” water are Sagitta elegans, Sagitta serratodentata, Aglantha rosea, Stephanomia bijuga, Clione limacina, Meganyctiphanes norvegica, Thysanoessa inermis, and Cosmetira pilosella (in spring and summer only). Sagitta setosa is regarded as an indicator of “Channel” water. Muggiæa, Salps, Doliolids, Liriope exigua and Euchœa hebes are regarded as indicators of “south-western” water.The geographical distribution of S. setosa is discussed. It is shown that it is probably a neritic species mainly confined to the English Channel and North Sea.S. setosa predominates off Plymouth when the easterly element in the Dover Straits current is suppressed and the flow of Atlantic water into the North Sea from the north is strong (Carruthers' Theory). The two Sagitta populations swing to and fro off Plymouth so that, with a strong flow of Atlantic water into the North Sea from the north, the S. elegans population is pushed westward to the mouth of the Channel and S. setosa occurs off Plymouth.During the course of the five years, 1930 to 1934, an agreement has been found between the occurrence or absence of concentrations of the diatom Rhizosolenia styliformis in the southern North Sea and the variations in the composition of the Sagitta population off Plymouth In the years in which Ehizosolenia, an indicator of Atlantic water, was abundant in the southern North Sea S. setosa predominated off Plymouth; when Rhizosolenia was absent S. elegans predominated.These diatom concentrations have been shown by Savage and Hardy t o have an apparent influence on the movements of the Herring which is reflected in the landings at Yarmouth and Lowestoft.

The Sean North, Sean South and Sean East Fields, Block 49/25a, UK North Sea

2003 ◽  
Vol 20 (1) ◽  
pp. 825-833 ◽  
Author(s):  
A. P. Hillier
Keyword(s):  
North Sea ◽  
The Other ◽  
Peak Shaving ◽  
Southern North Sea ◽  
Cap Rock ◽  
Sandstone Reservoir ◽  
Gas Fields ◽  
North And South ◽  
Direct Market

AbstractSean North, Sean South and Sean East are small prolific gas fields located on the Indefatigable Shelf in the Southern North Sea. They, like most of the other fields in the area, have a Carboniferous source, a Rotliegend aeolian sandstone reservoir and a Zechstein evaporite cap rock. Sean North and South have been developed to fulfil a peak-shaving role, being produced for only a few days per year in times of high gas demand when they can produce at rates of up to 600 MMSCF/D. East Sean is sold to the direct market. Reserves for the fields are 234 BCF (North), 488 BCF (South) and 127 BCF (East).

scholarly journals Clione limacina in Plymouth Waters

1931 ◽  
Vol 17 (3) ◽  
pp. 785-795 ◽  
Author(s):  
Marie V. Lebour
Keyword(s):  
North Sea ◽  
Bay Of Biscay ◽  
The West ◽  
Boreal Species ◽  
Southern North Sea ◽  
The North ◽  
South West ◽  
The North Sea ◽  
Clione Limacina ◽  
Eggs And Larvae

The pteropod Clione limacina (Phipps), now regarded as one of the tectibranchs, occurs at times in the neighbourhood of Plymouth. In 1930, however, it was extraordinarily abundant, especially in the summer, and was breeding freely. Although not specially recorded it has been seen singly or in small numbers in almost any month of the year, and for some years the eggs and larvæ (not recognised at the time as belonging to Clione) have been seen in summer. So far it is known from the British coasts in the North Sea and the west and extreme south-west of England. Its distribution, as known up to 1908, is given fully for the area of International Fisheries Investigations by Paulsen (1910). There it is shown that it is an Arctic-boreal species, spreading southwards nearly to the Bay of Biscay, which is about its southerly limit. It is known to occur in the northern and mid North Sea, but not in the southern North Sea, and at that time was only recorded from the Channel in the extreme west. It is also common in the Atlantic. Paulsen was led to infer that Clione limacina did not enter the North Sea from the Channel, but its prevalence sometimes at Plymouth shows that it can come a long way up the Channel and, as few samples are taken to the east and in the southern North Sea, this view should be carefully reconsidered.

The Mercury and Neptune Fields, Blocks 47/9b, 47/4b, 47/5a, 42/29, UK North Sea

2003 ◽  
Vol 20 (1) ◽  
pp. 777-787
Author(s):  
B. Smith ◽  
V. Starcher
Keyword(s):  
North Sea ◽  
Reservoir Level ◽  
Southern North Sea ◽  
Export Rate ◽  
Recoverable Reserves ◽  
Closed Structure ◽  
Sandstone Formation ◽  
Gas Fields

AbstractThe Mercury and Neptune Gas Fields, discovered in 1983 and 1985 respectively, are located on the NW margin of the southern North Sea. Both fields have reservoirs in the Permian Lower Leman Sandstone Formation of the Rotliegend Group. The Mercury Field, at Rotliegend level, is an elongate, southerly tilting horst block. It trends NW-SE and is bounded by reverse faults. The Neptune Field, at top reservoir level is a faulted, four-way dip closed structure that is elongated in a NW-SE direction. The combined gas-in-place for the two fields is estimated at 465 BCF with recoverable reserves of 368 BCF. Development drilling on Mercury commenced in early 1999 and on Neptune it is scheduled to start in Q3 1999. The maximum gas export rate will be 250 MMSCFD with first gas anticipated in November 1999.

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