Skip to Main Content
GEOREF RECORD

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

Tesfamariam Berhane Abay, Dag Arild Karlsen, Jon Halvard Pedersen, Snorre Olaussen and Kristian Backer-Owe
Thermal maturity, hydrocarbon potential and kerogen type of some Triassic-Lower Cretaceous sediments from the SW Barents Sea and Svalbard
Petroleum Geoscience (October 2017) 24 (3): 349-373

Abstract

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.


ISSN: 1354-0793
EISSN: 2041-496X
Serial Title: Petroleum Geoscience
Serial Volume: 24
Serial Issue: 3
Title: Thermal maturity, hydrocarbon potential and kerogen type of some Triassic-Lower Cretaceous sediments from the SW Barents Sea and Svalbard
Affiliation: University of Oslo, Department of Geosciences, Oslo, Norway
Pages: 349-373
Published: 20171024
Text Language: English
Publisher: Geological Society Publishing House for EAGE (European Association of Geoscientists & Engineers), London, United Kingdom
References: 62
Accession Number: 2018-002151
Categories: Economic geology, geology of energy sources
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. strat. cols., 3 tables, geol. sketch maps
N71°00'00" - N75°00'00", E20°00'00" - E34°00'00"
Secondary Affiliation: Lundin Norway, NOR, NorwayUniversity Centre in Svalbard, NOR, Norway
Country of Publication: United Kingdom
Secondary Affiliation: GeoRef, Copyright 2018, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States. Reference includes data from The Geological Society, London, London, United Kingdom
Update Code: 201801
Close Modal

or Create an Account

Close Modal
Close Modal