Shallow stratigraphic drilling applied in hydrocarbon exploration of the Nordkapp Basin, Barents Sea

Bugge, Tom; Elvebakk, G.; Fanavoll, S.; Mangerud, Gunn; Smelror, Morten; Weiss, Hermann M.; Gjelberg, J.; Kristensen, S.E.; Nilsen, Kåre Tormod

doi:10.1016/s0264-8172(01)00051-4

Cited by 84 publications

(116 citation statements)

References 15 publications

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“…9E-9F), interpreted as the deposits of tide-influenced distributary channels. Along with widespread shelf deposits, this is similar to the depositional environments described in the remainder of the Uralian-derived Triassic succession in the Barents Sea (e.g., Bugge et al, 2002;Klausen and Mørk, 2014).…”

Section: Fa4supporting

confidence: 71%

Linking an Early Triassic delta to antecedent topography: Source-to-sink study of the southwestern Barents Sea margin

et al. 2017

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Present-day catchments adjacent to sedimentary basins may preserve geomorphic elements that have been active through long intervals of time. Relicts of ancient catchments in present-day landscapes may be investigated using mass-balance models and can give important information about upland landscape evolution and reservoir distribution in adjacent basins. However, such methods are in their infancy and are often difficult to apply in deep-time settings due to later landscape modification.The southern Barents Sea margin of N Norway and NW Russia is ideal for investigating source-to-sink models, because it has been subject to minor tectonic activity since the Carboniferous, and large parts have eluded significant Quaternary glacial erosion. A zone close to the present-day coast has likely acted as the boundary between basin and catchments since the Carboniferous. Around the Permian-Triassic transition, a large delta system started to prograde from the same area as the present-day largest river in the area, the Tana River, which has long been interpreted to show features indicating that it was developed prior to present-day topography. We performed a source-to-sink study of this ancient system in order to investigate potential linkages between present-day geomorphology and ancient deposits.We investigated the sediment load of the ancient delta using well, core, twodimensional and three-dimensional seismic data, and digital elevation models to investigate the geomorphology of the onshore catchment and surrounding areas. Our results imply that the present-day GSA Bulletin; January/February 2018; v. 130 Tana catchment was formed close to the Permian-Triassic transition, and that the Triassic delta system has much better reservoir properties compared to the rest of Triassic basin infill. This implies that landscapes may indeed preserve catchment geometries for extended periods of time, and it demonstrates that source-to-sink techniques can be instrumental in predicting the extent and quality of subsurface reservoirs.

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Section: Fa4supporting

confidence: 71%

Linking an Early Triassic delta to antecedent topography: Source-to-sink study of the southwestern Barents Sea margin

et al. 2017

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“…Hence, episodic (or even seasonal) IRD input can not be excluded for the late Volgian Barents Sea, which reveals a paleolatitude of almost 55°N. According to previous paleogeographic estimates, the location of core 7430/10-U-01 was at least 300 km away from any coastline during the late Jurassic to early Cretaceous (e.g., Ziegler 1988;Bugge et al 1989;Dypvik et al 1996;Smelror et al 1998). However, our results suggest a much more proximal position below wave base, which is indicated by the origin, the preservation, and the grain size of the organic material.…”

Section: Paleogeographic Positionmentioning

confidence: 94%

“…This increased the prominence of shallow marine basins along the continental shelf, thereby promoting the development of restricted depositional environments, and favored the accumulation and preservation of organic matter (e.g., Demaison and Moore 1980). As a result, dark-colored, organic carbon-rich sediments, so-called black shales, occurred widely during this period, for example, in the marginal seas of the North Atlantic (e.g., Schlanger and Jenkyns 1976;Stein et al 1986;De Graciansky et al 1987), along the Norwegian-Greenland Seaway (e.g., Dore´1991; Smelror et al 2001;Mutterlose et al 2003), and in the adjacent Barents Sea (e.g., Bugge et al 1989Bugge et al , 2002. The formation of black shales is often attributed to ''oceanic anoxic events'' (OEAs) on a global scale, for example, during the Cenomanian/Turonian which is characterized by a relatively high sea-level stand (e.g., Arthur et al 1987;Erbacher et al 2001).…”

Section: Introductionmentioning

confidence: 99%

“…Much of the scientific interest in these sequences was also raised by the Mjølnir meteorite (e.g., Gudlaugsson 1993;Dypvik et al 1996), which impacted the paleo-Barents Sea close to the Volgian-Ryazanian (early/late Berriasian) boundary 142±2.6 Ma ago (e.g., Smelror et al 2001). Core 7430/10-U-01 is located only 30 km off the outer rim of the impact crater, and comprises the late Kimmeridgian to early Ryazanian Hekkingen Formation (e.g., Worsley et al 1988;Bugge et al 1989;Å rhus et al 1990), of which the late Volgian sequence (cf. below for age control) shows an exceptional suite of organic carbon-rich, laminated black shales which are actually marine sapropels.…”

Section: Introductionmentioning

confidence: 99%

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Paleoenvironment and sea-level change in the early Cretaceous Barents Sea?implications from near-shore marine sapropels

et al. 2003

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The late Volgian (early ''Boreal'' Berriasian) sapropels of the Hekkingen Formation of the central Barents Sea show total organic carbon (TOC) contents from 3 to 36 wt%. The relationship between TOC content and sedimentation rate (SR), and the high Mo/Al ratios indicate deposition under oxygen-free bottomwater conditions, and suggest that preservation under anoxic conditions has largely contributed to the high accumulation of organic carbon. Hydrogen index values obtained from Rock-Eval pyrolysis are exceptionally high, and the organic matter is characterized by wellpreserved type II kerogen. However, the occurrence of spores, freshwater algae, coal fragments, and charred land-plant remains strongly suggests proximity to land. Short-term oscillations, probably reflecting Milankovitch-type cyclicity, are superimposed on the long-term trend of constantly changing depositional conditions during most of the late Volgian. Progressively smaller amounts of terrestrial organic matter and larger amounts of marine organic matter upwards in the core section may have been caused by a continuous sea-level rise.

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“…For paper 1, a total of 144 samples covering the Triassic to the Early Cretaceous age were (Bugge et al, 2002;Mørk and Elvebakk, 1999), mainly from the Svalis Dome and the Nordkapp Basin. In paper 1, such samples are referred to as ''shallow core samples'' and have sample depth between 27 m and 120 m below the seabed (see Table 2 In terms of lithology, most samples studied in paper 1 represent shale or mudstone or claystone.…”

Section: Source Rocks (Papers 1 and 2)mentioning

confidence: 99%

Thermal maturity, hydrocarbon potential and kerogen type of some Triassic–Lower Cretaceous sediments from the SW Barents Sea and Svalbard

Abay

Karlsen

Pedersen

et al. 2017

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Rock-Eval and total organic carbon (TOC) analyses of 144 samples representing Triassic–Lower Cretaceous intervals from the SW Barents Sea (the Svalis Dome, the Nordkapp and Hammerfest basins, and the Bjarmeland Platform) and Svalbard demonstrate lateral variations in source rock properties. Good to excellent source rocks are present in the Lower–Middle Triassic Botneheia and Steinkobbe, and Upper Jurassic Hekkingen formations, 1 – 7 wt% and 6 – 19 wt% TOC, respectively. Hydrogen indices of 298 – 609 mg HC/g TOC in the Botneheia Formation from Svalbard, and 197 – 540 mg HC/g TOC in the Steinkobbe Formation of Svalis Dome suggest Type II (oil-prone) and Type II/III (oil/gas-prone) kerogens, respectively. The Kobbe Formation (Botneheia/Steinkobbe-equivalent) is organic-lean and generally gas-prone (Type III kerogen) on the Bjarmeland Platform and in the Nordkapp Basin, and is a good source rock with Type III/II kerogen in the Hammerfest Basin. In the investigated wells, the Hekkingen Formation is more oil-prone on the Bjarmeland Platform than in the Nordkapp Basin, while Lower Cretaceous samples have poor potential for oil. Upper Triassic samples show potential mainly for gas; however, coal/coaly-shale samples in well 7430/07-U-01 (Bjarmeland Platform) are oil/gas-prone. Most samples analysed are immature to early mature; thus, the variation in petroleum potential and kerogen type is a function of organic facies rather than maturity levels.

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Shallow stratigraphic drilling applied in hydrocarbon exploration of the Nordkapp Basin, Barents Sea

Cited by 84 publications

References 15 publications

Linking an Early Triassic delta to antecedent topography: Source-to-sink study of the southwestern Barents Sea margin

Linking an Early Triassic delta to antecedent topography: Source-to-sink study of the southwestern Barents Sea margin

Paleoenvironment and sea-level change in the early Cretaceous Barents Sea?implications from near-shore marine sapropels

Thermal maturity, hydrocarbon potential and kerogen type of some Triassic–Lower Cretaceous sediments from the SW Barents Sea and Svalbard

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