Characteristics of a wing-like sandstone intrusion, Volund Field

Nicholas Satur* (Corresponding Author), Andrew Hurst, Asgeir Bang, Ivar Skjærpe, Sarah Alexandra Muehlboeck

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

Reservoirs in the Volund Field are all sandstone intrusions with wings on three sides forming the main reservoir volumes. The southern wing was the target of exploration and appraisal wells, which led to the field development. Identification of three smaller intrusions prove the southern wing is a composite intrusion, similar to outcrop analogues. Identification from core and borehole logs shows it comprises sandstone, mudstone and mudstone-rich intervals, including mudstone clast breccia. Mudstone clast breccia constitutes a significant missed pay candidate. Breccia is porous and has a sand-supported matrix, which gives it excellent reservoir quality. This may be missed pay using analysis of borehole logs. Well data, largely borehole logs, show consistently uniform sandstone porosity distribution within the intrusions, independent of depth. Significantly, at about 100m from the depth at which the wing emanates from sills, porosity has a broader spread of values. The spread of values is attributable to mudstone clast breccia and thin-bedded sandstone and mudstone. Porosity derived from borehole logs does not differentiate breccia from siltstone, but inference is possible using calibration of logs with core
Original languageEnglish
JournalSpecial Publication - Geological Society of London
Volume493
Early online date10 Apr 2020
DOIs
Publication statusE-pub ahead of print - 10 Apr 2020

Fingerprint Dive into the research topics of 'Characteristics of a wing-like sandstone intrusion, Volund Field'. Together they form a unique fingerprint.

  • Cite this