KAOLINITIZATION OF UPPER TRIASSIC-LOWER JURASSIC SANDSTONES OF THE TAMPEN SPUR AREA, NORTH SEA: IMPLICATIONS FOR EARLY DIAGENESIS AND FLUID FLOW

1997 ◽  
pp. 253-268 ◽  
Author(s):  
MOHIT KHANNA ◽  
GIRISH C. SAIGAL ◽  
KNUT BJØRLYKKE
Keyword(s):  
Fluid Flow ◽  
North Sea ◽  
Lower Jurassic ◽  
Early Diagenesis ◽  
Upper Triassic ◽  
Area North

The Beryl Field, Block 9/13, UK North Sea

1991 ◽  
Vol 14 (1) ◽  
pp. 33-42 ◽  
Author(s):  
C. A. Knutson ◽  
I. C. Munro
Keyword(s):  
North Sea ◽  
Middle Jurassic ◽  
Oil And Gas ◽  
Upper Jurassic ◽  
Lower Jurassic ◽  
Gas Production ◽  
Upper Triassic ◽  
Oil Field ◽  
Oil And Gas Production ◽  
The North

AbstractThe Beryl Field, the sixth largest oil field in the UK sector of the North Sea, is located within Block 9/13 in the west-central part of the Viking Graben. The block was awarded in 1971 to a Mobil operated partnership and the 9/13-1 discovery well was drilled in 1972. The Beryl A platform was emplaced in 1975 and the Beryl B platform in 1983. To date, ninety-five wells have been drilled in the field, and drilling activity is anticipated into the mid-1990s.Commercial hydrocarbons occur in sandstone reservoirs ranging in age from Upper Triassic to Upper Jurassic. Structurally, the field consists of a NNE orientated horst in the Beryl A area and westward tilted fault blocks in the Beryl B area. The area is highly faulted and complicated by two major and four minor unconformities. The seal is provided by Upper Jurassic shales and Upper Cretaceous marls.There are three prospective sedimentary sections in the Beryl Field ranked in importance as follows: the Middle Jurassic coastal deltaic sediments, the Upper Triassic to Lower Jurassic continental and marine sediments, and the Upper Jurassic turbidites. The total ultimate recovery of the field is about 800 MMBBL oil and 1.6 TCF gas. As of December 1989, the field has produced nearly 430 MMBBL oil (primarily from the Middle Jurassic Beryl Formation), or about 50% of the ultimate recovery. Gas sales are scheduled to begin in the early 1990s. Oil and gas production is forecast until licence expiration in 2018.The Beryl Fields is located 215 miles northeast of Aberdeen, about 7 miles from the United Kingdom-Norwegian boundary. The field lies within Block 9/13 and covers and area of approximately 12 000 acres in water depths ranging from 350-400 ft. Block 9/13 contains several hydrocarbon-bearing structures, of which the Beryl Fields is the largest (Fig. 1). The field is subdivided into two producing areas: the Beryl Alpha area which includes the initial discovery well, and the Beryl Bravo area located to the north. The estimated of oil originally in place is 1400 MMBBL for Beryl A and 700 MMBBL for Beryl B. The fiel has combined gas in place of 2.8 TCF, consisting primarily of solution gas. Hydrocarbon accumulations occur in six reservoir horizons ranging in age from Upper Triassic to Upper Jurassic. The Middle Jurassic (Bathonian to Callovian) age Beryl Formation is the main reservoir unit and contains 78% of the total ultimate recovery.The field was named after Beryl Solomon, the wife of Charles Solomon, who was president of Mobil Europe in 1972 when the field was discovered. The satellite fields in Block 9/13 (Nevis, Ness and Linnhe) are named after Scottish lochs.

Nutrient early diagenesis in the sandy sediments of the dogger bank area, north sea: Pore water results

1990 ◽  
Vol 26 (1) ◽  
pp. 25-52 ◽  
Author(s):  
Wim Van Raaphorst ◽  
Henderikus T. Kloosterhuis ◽  
Alexandra Cramer ◽  
Karel J.M. Bakker
Keyword(s):  
Pore Water ◽  
North Sea ◽  
Early Diagenesis ◽  
Dogger Bank ◽  
Area North ◽  
Sandy Sediments

scholarly journals UPPER TRIASSIC TO LOWER JURASSIC SHALLOW-WATER CARBONATES NORTH OF LAKE SHKODRA (NW ALBANIA, ALBANIAN ALPS ZONE): PART OF THE ADRIATIC CARBONATE PLATFORM BASEMENT

2019 ◽  
pp. 3-12
Author(s):  
Hans-Jürgen Gawlick ◽  
Felix Schlagintweit
Keyword(s):  
Shallow Water ◽  
Carbonate Platform ◽  
Sedimentary Rocks ◽  
Lower Jurassic ◽  
Upper Triassic ◽  
Larger Benthic Foraminifera ◽  
Area North ◽  
Albanian Alps ◽  
Water Carbonate ◽  
Shallow Water Carbonate

The palaeogeographic reconstruction of the Adriatic Carbonate Platform and its continuation to the south represents a helpful tool to understand the Mesozoic palaeogeography of the Dinarides–Albanides–Hellenides oro-genic system. In the present paper poorly known Upper Triassic to Lower Jurassic (Toarcian) shallow-water car-bonates from the Shkodra area in northwest Albania (external Albanides; Albanian Alps zone) were investigated, dat-ed mainly by larger benthic foraminifera. The microfossil associations as well as litho- and microfacies characteristics are equivalent to contemporaneous shallow-water carbonate successions of the Adriatic Carbonate Platform basement to the NW (in the High Karst zone). As a result of our study we clearly see a continuation of the Adriatic Carbonate Platform from the Dinarides to the Albanides. In the area north of Lake Shkodra no Upper Triassic to Lower Jurassic hemipelagic sedimentary rocks, which could be a possible connection between the Budva Unit to the NW and the Cukali Unit to the SW, were detected.

scholarly journals MESOZOIC RADIOLARIANS FROM RHYTHMICALLY LAYERED SEDIMENTS OF THE RIMSKY-KORSAKOV ISLANDS (PETER THE GREAT BAY, JAPAN SEA) AND THEIR SIGNIFICANCE FOR DETERMINING THE TRIASSIC-JURASSIC BOUNDARY

2021 ◽  
pp. 39-54
Author(s):  
O.L. Smirnova ◽  
◽  
E.A. Bessonova ◽  
T.A. Emelyanova ◽  
◽  
...  
Keyword(s):  
Peter The Great Bay ◽  
Japan Sea ◽  
Research Area ◽  
Lower Jurassic ◽  
Upper Triassic ◽  
Peter The Great ◽  
Great Bay ◽  
The Pacific ◽  
Stratigraphic Division ◽  
First Time

The results of the biostratigraphic study based on the radiolarian analysis of the rhythmically layered terrigenous deposits from the Islands of the Rimsky-Korsakov Archipelago (Peter the Great Bay, Japan Sea) have been presented. These deposits are most similar to the medium-grained turbidites. For the first time the distribution and stratigraphic division of the boundary sediments of the upper Triassic and lower Jurassic separated by a marking layer were substantiated in the research area. On the basis of comparisons with isochronous zonal units of the Pacific and Tethyan areas in the upper Triassic sediments of the studied sections, layers with Globolaxtorum tozeri (upper Rhaetian) were established, and in the lower Jurassic zone Pantanellium tanuense Zone (Hettangian) was traced and layers with Parahsuum simplum (Sinemurian – Pliensbachian) were established.

An ichthyosaur forefin from the Triassic of British Columbia exemplifying Jurassic features

1991 ◽  
Vol 28 (10) ◽  
pp. 1553-1560 ◽  
Author(s):  
C. McGowan
Keyword(s):  
British Columbia ◽  
North America ◽  
Lower Jurassic ◽  
Upper Triassic ◽  
New Material ◽  
Important Site

New ichthyosaur material is reported from an Upper Triassic locality on Williston Lake, northeastern British Columbia. The paucity of ichthyosaurs from the Triassic of North America make this a potentially important site. An isolated forefin is described, which is unlike that of any Triassic species from North America but which compares closely with certain Lower Jurassic species from England and Germany. The new material suggests that the transition in the ichthyosaurian fauna at the close of the Triassic may have been less abrupt than was previously supposed.

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