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GEOREF RECORD

Controls on the reservoir quality of Late Cretaceous Springar Formation deep-water fan systems in the Voring Basin

Alana Finlayson, Angela Melvin, Alex Guise and James M. Churchill
Controls on the reservoir quality of Late Cretaceous Springar Formation deep-water fan systems in the Voring Basin (in Petroleum geology of NW Europe; 50 years of learning; proceedings of the 8th petroleum geology conference, M. Bowman (editor) and B. Levell (editor))
Petroleum Geology Conference Series (2018) 8: 247-257

Abstract

A new reservoir quality model is proposed for the Late Cretaceous Springar Formation sandstones of the Voring Basin. Instead of a depth-related compactional control on reservoir quality, distinct high- and low-permeability trends are observed. Fan sequences which sit on the high-permeability trend are characterized by coarse-grained facies with a low matrix clay content. These facies represent the highest energy sandy turbidite facies within the depositional system, and were deposited in channelized or proximal lobe settings. Fan sequences on the low-permeability trend are characterized by their finer grain size and the presence of detrital clay, which has been diagenetically altered to a highly microporous, illitic, pore-filling clay. These fan sequences are interpreted to have been deposited in proximal-distal lobe environments. Original depositional facies determines the sorting, grain size and detrital clay content, and is the fundamental control on reservoir quality, as the illitization of detrital clay is the main mechanism for reductions in permeability. Core-scale depositional facies were linked to seismic-scale fan elements in order to better predict porosity and permeability within each fan system, allowing calibrated risking and ranking of prospects within the Springar Formation play.


ISSN: 2047-9921
Serial Title: Petroleum Geology Conference Series
Serial Volume: 8
Title: Controls on the reservoir quality of Late Cretaceous Springar Formation deep-water fan systems in the Voring Basin
Title: Petroleum geology of NW Europe; 50 years of learning; proceedings of the 8th petroleum geology conference
Author(s): Finlayson, AlanaMelvin, AngelaGuise, AlexChurchill, James M.
Author(s): Bowman, M.editor
Author(s): Levell, B.editor
Affiliation: BG Group, Reading, United Kingdom
Affiliation: University of Manchester, Manchester, United Kingdom
Pages: 247-257
Published: 2018
Text Language: English
Publisher: Geological Society of London, London, United Kingdom
Meeting name: 8th petroleum geology conference
Meeting location: London, GBR, United Kingdom
Meeting date: 20150928Sept. 28-30, 2015
References: 12
Accession Number: 2018-037064
Categories: Economic geology, geology of energy sourcesSedimentary petrology
Document Type: Serial Conference document
Bibliographic Level: Analytic
Illustration Description: illus. incl. chart, 1 table, geol. sketch maps
N66°10'00" - N67°10'00", E03°19'60" - E08°00'00"
Secondary Affiliation: AM Geos, GBR, United Kingdom
Country of Publication: United Kingdom
Secondary Affiliation: GeoRef, Copyright 2018, American Geosciences Institute. Reference includes data from The Geological Society, London, London, United Kingdom
Update Code: 201809
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