Kristian Backer-Owe

• Matapour, Zagros; Karlsen, Dag Arild; Lerch, Benedikt & Backer-Owe, Kristian (2019). Petroleum occurrences in the carbonate lithologies of the gohta and alta discoveries in the barents sea, arctic Norway. Petroleum Geoscience. ISSN 1354-0793. 25(1), p. 50–70. doi: 10.1144/petgeo2017-085.
• Lerch, Benedikt; Karlsen, Dag Arild; Thießen, Olaf; Abay, Tesfamariam Berhane; van Soelen, Elsbeth Ester & Kürschner, Wolfram Michael [Show all 8 contributors for this article] (2018). Investigations on the use of triaromatic dimethylcholesteroids as age-specific biomarkers in bitumens and oils from Arctic Norway. Organic Geochemistry. ISSN 0146-6380. 122, p. 1–16. doi: 10.1016/j.orggeochem.2018.04.011.
• Abay, Tesfamariam Berhane; Karlsen, Dag Arild; Pedersen, Jon Halvard; Olaussen, Snorre & Backer-Owe, Kristian (2018). Thermal maturity, hydrocarbon potential and kerogen type of some Triassic-Lower Cretaceous sediments from the SW Barents Sea and Svalbard. Petroleum Geoscience. ISSN 1354-0793. 24(3), p. 349–373. doi: 10.1144/petgeo2017-035.
• Abay, Tesfamariam Berhane; Karlsen, Dag Arild; Lerch, Benedikt; Olaussen, Snorre; Pedersen, Jon Halvard & Backer-Owe, Kristian (2017). Migrated petroleum in outcropping Mesozoic sedimentary rocks in Spitsbergen: organic geochemical characterization and implications for regional exploration. Journal of Petroleum Geology. ISSN 0141-6421. 40(1), p. 5–36. doi: 10.1111/jpg.12662.
• Lerch, Benedikt; Karlsen, Dag Arild; Seland, Reinert & Backer-Owe, Kristian (2017). Depositional environment and age determination of oils and condensates from the Barents Sea. Petroleum Geoscience. ISSN 1354-0793. 23(2), p. 190–209. doi: 10.1144/petgeo2016-039.
• Lerch, Benedikt; Karlsen, Dag Arild; Matapour, Zagros; Seland, Reinert & Backer-Owe, Kristian (2016). Organic geochemistry of barents sea petroleum: Thermal maturity and alteration and mixing processes in oils and condensates. Journal of Petroleum Geology. ISSN 0141-6421. 39(2), p. 125–148. doi: 10.1111/jpg.12637.
• Lerch, Benedikt; Karlsen, Dag Arild; Abay, Tesfamariam Berhane; Duggan, Deirdre; Seland, Reinert & Backer-Owe, Kristian (2016). Regional petroleum alteration trends in Barents Sea oils and condensates as a clue to migration regimes and processes. American Association of Petroleum Geologists Bulletin. ISSN 0149-1423. 100(2), p. 165–190. doi: 10.1306/08101514152.
• van Koeverden, Jan Hendrik; Karlsen, Dag Arild & Backer-Owe, Kristian (2011). CARBONIFEROUS NON-MARINE SOURCE ROCKS FROM SPITSBERGEN AND BJORNOYA: COMPARISON WITH THE WESTERN ARCTIC. Journal of Petroleum Geology. ISSN 0141-6421. 34(1), p. 53–66. doi: 10.1111/j.1747-5457.2011.00493.x.
• van Koeverden, Jan Hendrik; Karlsen, Dag Arild; Schwark, L; Chpitsglouz, A & Backer-Owe, Kristian (2010). OIL-PRONE LOWER CARBONIFEROUS COALS IN THE NORWEGIAN BARENTS SEA: IMPLICATIONS FOR A PALAEOZOIC PETROLEUM SYSTEM. Journal of Petroleum Geology. ISSN 0141-6421. 33(2), p. 155–181. doi: 10.1111/j.1747-5457.2010.00471.x.
• Alve, Elisabeth; Lepland, Aivo; Magnusson, Jan & Backer-Owe, Kristian (2009). Monitoring strategies for re-establishment of ecological reference conditions: Possibilities and limitations. Marine Pollution Bulletin. ISSN 0025-326X. 59(8-12), p. 297–310. doi: 10.1016/j.marpolbul.2009.08.011.
• Svensen, Henrik; Karlsen, Dag Arild; Sturz, Anne; Backer-Owe, Kristian; Banks, David A. & Planke, Sverre (2007). Processes controlling water and hydrocarbon composition in seeps from the Salton Sea geothermal system, California, USA. Geology. ISSN 0091-7613. 35(1), p. 85–88. doi: 10.1130/G23101A.1.
• Pedersen, Jon Halvard; Karlsen, Dag Arild; Spjeldnæs, Nils; Backer-Owe, Kristian; Lie, JE & Brunstad, H (2007). Lower Paleozoic petroleum from southern Scandinavia: Implications to a Pleozoic petroleum system offshore southern Norway. American Association of Petroleum Geologists Bulletin. ISSN 0149-1423. 91, p. 1189–1212. doi: 10.1306/03080706020.
• Ohm, Sverre Ekrene; Karlsen, Dag Arild; Backer-Owe, Kristian; Pedersen, Jon Halvard & Beeley, H. S. (2007). A drilling mud additive influencing the geochemical interpretations of hydrocarbon shows. Petroleum Geoscience. ISSN 1354-0793. 13, p. 369–376.
• Pedersen, Jon Halvard; Karlsen, Dag Arild; Backer-Owe, Kristian; Lie, Jan Erik & Brunstad, Harald (2006). The geochemistry of two unusual oils from the Norwegian North Sea: implications for new source rock and play scenario. Petroleum Geoscience. ISSN 1354-0793. 12, p. 85–96. Show summary

  ABSTRACT: Two oils from the Norwegian North Sea and a source-rock extract from the Danish North Sea are seen to have chemical properties deviating from any previously known North Sea oils. An organic geochemical investigation concludes that the two oils are of low to medium maturity, and that these oils represent alternative organic facies of Upper Jurassic age. The organic facies that sourced the investigated oils are believed to be hypersaline and carbonate-type source rocks, which were most likely deposited in locally developed, secluded lagoonal settings with elevated salinity and low clastic influx. The alternative source rocks inferred by the two atypical oils may add new concepts to petroleum exploration on the margins of the Mesozoic Central Graben and Viking Graben in the North Sea.

• Karlsen, Dag Arild; Skeie, Jon Erik; Backer-Owe, Kristian & Bjørlykke, Knut (2004). PETROLEUM MIGRATION, FAULTS AND OVERPRESSURE-Part II--CASE HISTORY-THE HALTENBANKEN PETROLEUM PROVINCE, OFFSHORE NORWAY. Geological Society Special Publication. ISSN 0305-8719. 237, p. 305–372. Show summary

  Petroleum inclusion and geochemical data from core extracts were applied to deduce model for oil migration, over-pressure development and paleo-leakage of oil from currently dry structures in the Haltenbanken Vest area. The existence of fluorescent oil type inclusions in quartz in the Smørbukk (Åsgard-2) field suggest that oil migrated into this structure 70-50 million years before present (M.Y.b.p.). This is also the case for the dry structures 6506/12-4, 6506/11-3 and 6506/11-1, west of the main Smørbukk Fault Zone. Black oil inclusions with medium gas to oil ratio (GOR) occur in these fields together with condensate type petroleum inclusions. This suggests that the dry structures transformed from containing oil to condensate before leakage. Petroleum extracted from inclusions in these structures and in nearby fields have identical marine type II kerogen signatures. Source rocks at the Spekk Fm. level in the current drainage area of Smørbukk and these dry structures, were immature 70-50 M.Y.b.p. and the Smørbukk Sør (Åsgard-3) field did not fill at this early time. Thus, oil must initially have entered into Smørbukk from areas to the west-south west, through the currently pressure sealing Smørbukk Fault Zone which today marks the westward limit of the Smørbukk field. Diagenesis in this fault zone caused the much later overpressure development and petroleum was lost from the 6506/12-4, 6506/11-3 and 6506/11-1 structures as overpressure built up regionally. Petroleum loss from these structures with their often thick seals must have occurred via self-propagating open-fracture induced mechanisms. Lack of petroleum in the Cretaceous strata above these structures suggests that leakage occurred to even shallower strata. This could imply that the Cretaceous strata in Halten Vest were over-pressured at the time of leakage. In contrast, the oil in the Cretaceous Lysing and Lange Fm. (above the Jurassic reservoirs in Smørbukk and Smørbukk Sør) most likely originated (based on geochemistry and gas to oil ratios) from the Jurassic reservoirs below and not from Cretaceous strata. This migration event would have been facilitated if it occurred before these sands became over-pressured as they are today. Modelling suggests that the Spekk Fm. became mature in the Smørbukk Sør region < 10 M.Y.b.p. and microthermometry of oil inclusions from Smørbukk Sør supports filling during the last 10 M.Y. This implies that cap-rock failure in the Halten Vest structures 6506/12-4, 6506/11-1 and 6506/11-3 most likely occurred after filling of the Smørbukk Sør and 6406/3-1 structures. Rapid regional burial during the last 10 M.Y. caused local migration of oil into Smørbukk Sør, Smørbukk and 6406/3-1 structures, and generation of high gas to oil ratio oils (GOR) in the deeper Halten Vest region. High GOR petroleum inclusions in the Halten Vest structures signifies this event and suggests that cap rock fracturing occurred after a gas/condensate had replaced oil in these traps. Rapid burial during the last 3 M.Y. is likely to have caused the current overpressure and associated leakage in Halten Vest. The fact that these traps did not later refill in this progressively subsiding and maturing basin must be related to trap pressures remaining too close to the actual fracture pressures.

• Karlsen, Dag Arild; Backer-Owe, Kristian; Bjørlykke, Knut; Schaefer, Rainer G.; Bhullar, Abid Ghafoor & Angard, Kristian [Show all 11 contributors for this article] (2003). Faults and Oil Migration in the Halten Vest High Pressure and Haltenbanken Normal Pressure Regimes, Offshore Norway. AAPG Datapages Discovery Series. p. 343–346. Show summary

  The occurrence and geochemistry of fluid inclusions in authigenic mineral cements in addition to chemical characterization of bitumen and oil was used to provide a model for hydrocarbon sourcing and migration in the Smørbukk and Halten Vest region. We have found evidences to suggest that the main fault zone west of Smeørbukk, which today forms a pressure seal, was open for petroleum migraton from the west at least as early as 50 m.y.b.p. The presently dry structures in the Halten Vest region experienced cap-rock leakage upon receiving petroleum from the Spekk Formation and the subsequent genetically associated development of too high petroleum columns was evidently the cause of leakage as the region experienced a build up in pressure. The pressure build up must have occured at a time when the fault zone west of Smerbukk transformed from open to sealing. The same abundance of fluorescent petroleum inclusions in the Halten Vest dry wells as in Smørbukk implies according to our model that the time during which the presently dry Halten Vest structures actually held oil is roughly similar to the time petroleum has been present in Smerbukk. This implies that cap rock leakage in Halten Vest must have occurred, in geological terms, very recent. Petroleum migration from the vest through the presently sealing Smørbukk main fault zone should according to the homogenisation temperatures measured on the inclusions have occurred as early as 70-50 m.y.b.p. Subsequent fault movement and diagenesis on the fault plane lead to a situation in which the Halten Vest region was effectively sealed off from pressure let-off in a proximal direction towards the,East. This lead to seal failure in the Halten Vest region whilst in the normally pressured Halten region, pressure bleed-off towards the east continued, preserving oil m the structures. We exclude, in contrast to earlier published models by other workers, any quantitatively important contributions of light hydrocarbons (C2-C8) and heavier hydrocarbons (C15+) from the coal bearing Are Fm. to the presently reservoired hydrocarbon charges in these fields. This suggest the oil generative capability of the Spekk Fm. in deep basin depressions to be higher than often indicated from published models and we propose most condensates in the Haltenbanken region, apart from the 6406/7-1 condensate, to be evaporative condensates owing their existence to phase separation rather than to high maturity or an inferior kerogen quality.

• Bhullar, Abid Ghafoor; Karlsen, Dag Arild; Backer-Owe, Kristian; Tran, Ken Le & Skålnes, Eli (2000). Reservoir Characterization by a combined micro-extraction-micro thin-layer chromatography (Iatroscan) method: A calibration study with examples from the Norwegian North Sea. Journal of Petroleum Geology. ISSN 0141-6421. 23(2), p. 221–244. Show summary

  well logging is used routinely to deliniate variations in physical properties of water, gas and oil zones in petroleum reservoirs. We demonstrate how added information about the hydrocarbon distribution, the filling history of the structure and identification of prime production zones for hydrocarbons can be obtained by rapid and cost effective methods.

• Bhullar, Abid Ghafoor; Karlsen, Dag Arild; Backer-Owe, Kristian; Seland, R.T. & Tran, Ken Le (1999). Dating reservoir filling - a case history from the North Sea. Marine and Petroleum Geology. ISSN 0264-8172. 16, p. 581–603.
• Bhullar, Abid Ghafoor; Karlsen, Dag Arild; Backer-Owe, Kristian; Seland, R.T. & LeTran, K. (1999). Dating reservoir filling - a case history from the North Sea. Marine and Petroleum Geology. ISSN 0264-8172. 16, p. 581–603. Show summary

  The Frøy oil field and the Rind discovery in the North Sea were investigated geochemically for the identification of oil families and their relation to the generative basins in region. The filling histories of the field - which differ dramatically - despite the close proximity of the structures - were discussed.

• Karlsen, Dag Arild; Nyland, Bente; Flood, B.; Ohm, Sverre; Brekke, T. & Olsen, S. [Show all 7 contributors for this article] (1995). Petroleum Geochemistry af the Haltenbanken, Norwegian Continental Shelf. Geochemistry of Reservoirs. p. 203–256. Show summary

  All petroleum accumulations in Haltenbanken have been investigated geochemically. Clear-cut systematic relationships between oil facies ang geographic locations are detected. The oils and condensates ahve all origin from the marine type II Spekk Fm. and condenstes are generated, not by high maturity, rather by phase fractionation during secondary migration.

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• Abay, Tesfamariam Berhane; Karlsen, Dag Arild; Pedersen, Jon Halvard; Lerch, Benedikt & Backer-Owe, Kristian (2014). Regional Variation in the Triassic Organo-Facies signatures of the Barents Sea.
• Abay, Tesfamariam Berhane; Karlsen, Dag Arild; Backer-Owe, Kristian & Ohm, Sverre Ekrene (2013). Geochemical comparison of oils from the Central Graben: with special emphasis on correlation and transformation of oils from the Embla Field.
• Skeie, Jon Erik; Karlsen, Dag Arild; di-Primio, Rolando; Backer-Owe, Kristian; Lie, Jan Erik & Brunstad , Harald [Show all 8 contributors for this article] (2003). How an integrated study combining basin modelling, geochemical data and petroleum properties can constrain the timing of petroleum migration and evolution of overpressures in sedimentary basins. An example utilizing the distribution of petroleum in Mesozoic sediments in the Haltenbanken area, offshore Norway.
• Karlsen, Dag Arild; Backer-Owe, Kristian & Helland, Reidar (2000). Defining dynamics of hydrocarbon zones in reservoir strata using petroleum inclusions distribution and geochemistry. Show summary

  Oil reservoir compartmentalisation is deliniated using geochemical tools and examples from 5 wells in the Gullfaks Sør and the nearby Gullfaks Gamma structure illustrate this approach. The results obtaine does not only help in optimizing field production but do also provide data relevant for understanding better basin scale hydocarbon migration patters. Thus, the methods we illustrate have a clear impact for reservoir production and exploration for hydrocarbon resources.

• Karlsen, Dag Arild; Backer-Owe, Kristian; Bjørlykke, Knut; Berge, Kari & Schaefer, Rainer G. (2000). Faults, Oil Migration Overpressure and Dismigration - Dating Events. A case History from the Halten Vest High Pressure Region, Offshore Norway. Show summary

  Geochemical evidences from core extracts and fluid inclusions in diagenetic mineral is used to shed light on the overpressure development and palaeo-leakage from currently dry structures in the Haltenbanken area. A new model is presented for the role of faults during hydrocarbon migration and for determining the time for overpressure development

• Khoshbakht, Payam; Karlsen, Dag Arild; Backer-Owe, Kristian & Ohm, Sverre (2000). Variations in source facies and matuirty in Central Garaben Oils, Norwegian continental Shelf. Show summary

  The poster describes detailed geochemical characteristics of oils in the Central Graben Area. Clear trends in terms of increasing terrestrial contributions to oils from more proximal positions in the basin is demonstrated and oils are grouped into families.

• Karlsen, Dag Arild; Backer-Owe, Kristian & Helland, Reidar (2000). Defining Dynamics of Hydrocarbon Zones in reservoir Strata Using petroleum Inclusion - distributions and Geochemistry - Elucidating petroleum migration into the Gullfaks Sør Field and the nearby Gullfaks Gamma Structure, Norwegian Continental Shelf. Show summary

  Examination of core extracts, drill stem tests and fluorescent petroleum inclusions in 5 wells from the Gullfaks Sør and the Gullfaks Gamma structure has showed that these structures have experienced dramatic shift in their gas/oil zones during filling. The structures closest to the filling direction have experienced larger shifts in the contacts as the field filled. The presently gas filled Gamma structure is proved to ahve ealier contained oil. We illustrate how geochemical data are used to construct a filling direction model for the Gullfaks Sør and the Gullfaks Gamma structure.

• Karlsen, Dag Arild; Backer-Owe, Kristian; Bjørlykke, Knut; Scjaefer., R.G.; Bhullar, Abid Ghafoor & Angard, K. [Show all 11 contributors for this article] (1999). Faults and Oil Migration in the Halten Vest High Pressure and Haltenbanken Normal Pressure Regimes, Offshore Norway.
• Karlsen, Dag Arild; Backer-Owe, Kristian; Bjørlykke, Knut; Angard, K.; Steinhoff, Inga & Olstad, Richard [Show all 9 contributors for this article] (1999). Differential pressure across a fault zone and oil migration - an ezample from Haltenbanken offshore, Norway.
• Bhullar, Abid Ghafoor; Karlsen, Dag Arild; Johansen, H.; Backer-Owe, Kristian; Holm, Kristine & Primio, R. de (1999). "The filling history of the Rind and Froy petroleum accumulations, North Sea, using petroleum geochemical, fluid inclusion and PVT data to geological dating".

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