Stratigraphic signatures of punctuated rise in relative sea-level in an estuary-dominated heterolithic succession: Incised valley fills of the Toarcian Ostreaelv Formation, Neill Klinter Group (Jameson Land, East Greenland)
Ahokas J.M.,University of Oslo |
Ahokas J.M.,Det norske oljeselskap ASA |
Nystuen J.P.,University of Oslo |
Marine and Petroleum Geology | Year: 2014
The Ostreaelv Formation (latest Pliensbachian-Toarcian) of the Neill Klinter Group is exposed along a>105km wide, ENE-trending section in Jameson Land, East Greenland. Deposition took place in a large embayment (Jameson Land Basin) that was connected to the proto-Norwegian-Greenland Sea. Lithofacies in the Ostreaelv Formation range from clean sandstone to muddy heterolithic facies typified by strong grain-size contrasts.The Ostreaelv Formation is divided into four distinct and overall retrograding allostratigraphic units each composed of a characteristic set of tide-influenced, tide-dominated and wave-influenced facies associations. The allostratigraphic units are bounded by subaerial unconformities, interpreted as sequence boundaries, and are up to 75m thick and 16 to >20km in width. The allostratigraphic units include a sandy heterolithic estuary bay-head delta succession overlain by two sandy tide-dominated estuary fill successions, interbedded with a muddy heterolithic offshore marine succession. Each of the three estuarine allostratigraphic units was accumulated in an incised valley formed during fall in relative sea level and filled during successive transgressions with sediment supplied from marine and reworked fluvial deposits.In the three incised valleys fluvial sediments were deposited on top of an initial subaerial unconformity surface (SU) and were later reworked by succeeding transgressive ravinement along a transgressive surface (TS), thus creating combined SU/TS sequence boundaries. The data from the Ostreaelv Formation also provides knowledge and conceptual understanding of valley infill processes (tidal current, wave and fluvial energy), and both lateral and vertical variations in lithofacies architecture within incised valleys.Moreover, the study provides quantitative input data, such as incised valley dimensions, sand-containing capacity, and geometry to subsurface reservoir characterisation and modelling efforts of estuary fill successions. © 2013 Elsevier Ltd.
News Article | November 16, 2016
PHILADELPHIA--(BUSINESS WIRE)--As part of President Obama’s declaration of National Apprenticeship week, Philly Shipyard, Inc. (PSI), today hosted an event to showcase its widely respected Registered Apprenticeship program. In coordination with the Philadelphia School District, the shipyard invited 30 students from four area schools to its newly developed Training Academy, where current Philly Shipyard apprentices receive welding training. In May 2016, the company opened the academy to provide a dedicated facility offering customized training for all production personnel. The visiting students shadowed current apprentices in the new academy, met with former apprentices, and then participated in a tour of the larger shipyard facility. Jim Clark, PSI Training Manager, organized the second annual event and commented, “Philly Shipyard’s apprentice program is a necessity for our business to build and sustain a long-term workforce. Since its inception, the company has graduated 106 apprentices who have developed into the next generation of skilled shipbuilders. There are another 75 active apprentices. The students visiting today have an opportunity to witness first-hand the value of joining an apprenticeship program to learn the skills and academics necessary for a successful career in manufacturing. It is an opportunity like no other.” Initiated in 2004, the three-year apprenticeship program develops the next generation of Philly Shipyard employees. As of today, shipyard apprentice graduates and current apprentices make up 23% of its current workforce. Since its founding, 21 graduates have moved into management positions and many have obtained additional manufacturing qualifications. The shipyard hired 50 apprentices in 2016 and intends to hire more in 2017. Philly Shipyard has a construction backlog through 2019. It is currently building four 50,000 dwt tankers for a subsidiary of Kinder Morgan, Inc. and two 3,600 TEU containerships for Matson Navigation Company, Inc. For more information on Philly Shipyard projects, please visit www.phillyshipyard.com. Philly Shipyard is a leading U.S. commercial shipyard constructing vessels for operation in the Jones Act market. It possesses a state-of-the-art shipbuilding facility and has earned a reputation as the preferred provider of oceangoing merchant vessels with a track record of delivering quality ships. Philly Shipyard is listed on the Oslo Stock Exchange (Oslo: PHLY) and is majority-owned by Aker Capital II, which in turn is majority-owned by Aker ASA. Aker is a Norwegian industrial investment company that creates value through active ownership. Aker's investment portfolio is concentrated on key Norwegian industries that are international in scope: oil and gas, fisheries and biotechnology, and marine assets. Aker's industrial holdings comprise ownership interests in Aker Solutions, Kvaerner, Det norske oljeselskap, Aker BioMarine, Ocean Yield, Havfisk and Akastor. National Apprenticeship Week is an opportunity for the Apprenticeship community to tell the story of apprenticeships and is an invitation to business and industry, education, career seekers, community based organizations, students, and workers to learn about the real world advantages of developing careers through adoption of the apprenticeship model. Apprenticeship is for those who aspire to be great, lead in innovation and creativity, strive to innovate in business and industry, and recognize the value of combining paid on the job learning coupled with a substantial educational component to build generational greatness in careers and commerce.
News Article | November 30, 2016
Philly Shipyard, Inc. (PSI), the sole operating subsidiary of Philly Shipyard ASA (Oslo: PHLY), today delivered the American Endurance, the first of four next generation 50,000 dwt product tankers that it is building for American Petroleum Tankers (APT), a subsidiary of Kinder Morgan, Inc. This delivery is the 25th vessel built by PSI (formerly known as Aker Philadelphia Shipyard, Inc.). The next generation 50,000 dwt product tanker is based on a proven Hyundai Mipo Dockyards (HMD) design that also incorporates numerous fuel efficiency features, flexible cargo capability, and the latest regulatory requirements. The vessel has also received LNG Ready Level 1 approval from the American Bureau of Shipping (ABS). The 600-foot tanker has a carrying capacity of 14.5 million gallons of crude oil or refined products. "Today's delivery of our 25th vessel, aptly named the American Endurance, is a profound symbol of the shipbuilding legacy we have continued since re-opening in 1997. In collaboration with American Petroleum Tankers, we are proud of our contributions to renew the current tanker fleet with a more modern and environmentally friendly design. This vessel, like all others, was built from the hands and hearts of 1,200 shipbuilders for future crew to operate safely and with the quality expected." The shipyard has commenced construction of three other 50,000 dwt tankers for APT and two 3,600 TEU containerships for Matson Navigation Company, Inc. For more information on Philly Shipyard transactions and projects, please visit www.phillyshipyard.com. Philly Shipyard is a leading U.S. commercial shipyard constructing vessels for operation in the Jones Act market. It possesses a state-of-the-art shipbuilding facility and has earned a reputation as the preferred provider of oceangoing merchant vessels with a track record of delivering quality ships. Philly Shipyard is listed on the Oslo Stock Exchange and is majority-owned by Aker Capital II, which in turn is majority-owned by Aker ASA. Aker is a Norwegian industrial investment company that creates value through active ownership. Aker's investment portfolio is concentrated on key Norwegian industries that are international in scope: oil and gas, fisheries and biotechnology, and marine assets. Aker's industrial holdings comprise ownership interests in Aker Solutions, Kvaerner, Det norske oljeselskap, Aker BioMarine, Ocean Yield, Havfisk and Akastor. This information is subject to the disclosure requirements pursuant to section 5-12 of the Norwegian Securities Trading Act.
Saasen A.,Det Norske Oljeselskap ASA |
Hodne H.,University of Stavanger
Proceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE | Year: 2015
Throughout the last decades, the design and performance of the primary solid control devices have changed significantly. Some five decades ago, the circular motion shakers dominated the marked. These shakers operated by sending the drilling fluid downhill a vibrating screen. Thereafter appeared the elliptical motion or linear motion shakers where the cuttings particles were vibrated upwards a tilted screen. Onto these shakers, the use of double screen decks and finally triple screen decks became common. Within the last years also the vacuum devices appeared. Throughout the last two decades, there has been an effort to increase the g-forces on these shakers and the industry seems to have preferred the high g-force devices recently. Laboratory studies, however, has indicated that the very high g-forces are not necessary to perform proper solids control. Instead, different vibration modes interacts with the gel structure of the drilling fluid and remove yield stresses. Hence, the fluid becomes mobile for flow through the screen. Flow through screens is strongly dependent on the extensional properties within the drilling fluid rheology. Drilling fluids with high extensional viscosity seldom has a very strong gel structure, and are generally not affected equally much by vibrations. This explains why solids control is more difficult using a KCl/polymer water based drilling fluid than if using an oil based drilling fluid. This article focuses on describing how the drilling fluid rheological properties alter during primary solids control. It is based on theoretical analysis, rheological studies in the laboratory and finally on practical applications in two recent exploration drilling operations. The solids control efficiency resulting from using different screen configurations is outside the scope of this article, as this topic requires a higher focus on separation technology. © 2015 by ASME.
Fjaer E.,Sintef |
Fjaer E.,Norwegian University of Science and Technology |
Nes O.-M.,Det Norske Oljeselskap ASA
Rock Mechanics and Rock Engineering | Year: 2014
Properly accounting for the mechanical anisotropy of shales can be critical for successful drilling of high inclination wells, because shales are known to be weak along bedding planes. To optimize the drilling parameters in such cases, a sufficiently representative, anisotropic rock mechanical model is therefore required. This paper presents such a model developed to better match results from a dedicated, extensive set of uniaxial and triaxial compression tests performed on plugs of Mancos outcrop shale with different orientations relative to the bedding plane. Post failure inspection of the plugs shows that the failure planes are to some extent affected by the orientation of the applied stress relative to the bedding planes, indicating that the bedding planes may represent weak planes which tend to fail before intrinsic failure occurs, whenever the orientation of these planes is suitable. The simple "plane of weakness" model is commonly used to predict strength as function of orientation for such a rock. A comparison of this model to the experimental data shows, however, that the weak planes seem to have an impact on strength even outside the range of orientations where the model predicts such impact. An extension of this model allowing the weak planes to be heterogeneous in terms of patchy weakness was therefore developed. In this model, local shear sliding may occur prior to macroscopic failure, leading to enhanced local stresses and corresponding reduction in strength. The model is found to give better match with strength data at intermediate orientations. The model is also able to partly predict the qualitatively different variation of Young's modulus with orientation for this data set. © 2014 Springer-Verlag Wien.
Ottesen D.,Exploro AS |
Dowdeswell J.A.,University of Cambridge |
Bugge T.,Det norske oljeselskap ASA
Marine and Petroleum Geology | Year: 2014
The North Sea Basin has been subsiding during the Quaternary and contains hundreds of metres of fill. Seismic surveys (170000km2) provide new evidence on Early Quaternary sedimentation, from about 2.75 Ma to around the Brunhes-Matuyama boundary (0.78 Ma). We present an informal seismic stratigraphy for the Early Quaternary of the North Sea, and calculate sediment volumes for major units. Early Quaternary sediment thickness is>1000m in the northern basin and >700m in the central basin (total about 40000km3). Northern North Sea basin-fill comprises several clinoform units, prograding westward over 60000km2. Architecture of the central basin also comprises clinoforms, building from the southeast. To the west, an acoustically layered and mounded unit (Unit Z) was deposited. Remaining accommodation space was filled with fine-grained sediments of two Central Basin units. Above these units, an Upper Regional Unconformity-equivalent (URU) records a conformable surface with flat-lying units that indicate stronger direct glacial influence than on the sediments below. On the North Sea Plateau north of 59°N, the Upper Regional Unconformity (URU) is defined by a shift from westward to eastward dipping seismic reflectors, recording a major change in sedimentation, with the Shetland Platform becoming a significant source. A model of Early Quaternary sediment delivery to the North Sea shows sources from the Scandinavian ice sheet and major European rivers. Clinoforms prograding west in the northern North Sea Basin, representing glacigenic debris flows, indicate an ice sheet on the western Scandinavian margin. In the central basin, sediments are generally fine-grained, suggesting a distal fluvial or glacifluvial origin from European rivers. Ploughmarks also demonstrate that icebergs, derived from an ice sheet to the north, drifted into the central North Sea Basin. By contrast, sediments and glacial landforms above the URU provide evidence for the later presence of a grounded ice sheet. © 2014 The Authors.
News Article | November 16, 2015
Det norske oljeselskap ASA has agreed to buy Premier Oil Norge AS from Premier Oil PLC, London, for $120 million cash.
News Article | March 4, 2016
Det norske oljeselskap ASA has agreed to acquire Noreco Norway AS’s Norwegian license portfolio, including a $5-million cash balance. The deal is effective Jan. 1.
News Article | December 16, 2016
Aker BP ASA (formerly Det norske oljeselskap ASA) has extended the charter of the Safe Zephyrus semi-submersible accommodation vessel at the Ivar Aasen Project in the Norwegian sector of the North Sea. The 10 day option extends on site operations through January 2017 and has a total value of approximately USD 1.7 million. Prosafe is a leading owner and operator of semi-submersible accommodation vessels. The company is headquartered in Larnaca, Cyprus and listed on the Oslo Stock Exchange with ticker code PRS. For more information, please refer to www.prosafe.com For further information, please contact: This information is subject to the disclosure requirements pursuant to section 5-12 of the Norwegian Securities Trading Act.
News Article | March 10, 2016
The Norwegian Petroleum Directorate has granted Det norske oljeselskap AS a drilling permit for well 16/1-26 S in production license 001 B offshore Norway. The well will be drilled by the Maersk Interceptor drilling facility.