Semi-automated Correlation of Silurian Well-Logs Across Gotland, Sweden, Using Dynamic Time Warping With Barycenter Averaging

Michiel Arts; Daniel Sopher; Mikael Calner; Mikael Erlström; Rohit Samant; Bradley D. Cramer; Anne-Christine Da Silva

doi:10.2110/001c.147894

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Semi-automated Correlation of Silurian Well-Logs Across Gotland, Sweden, Using Dynamic Time Warping With Barycenter Averaging

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Semi-automated Correlation of Silurian Well-Logs Across Gotland, Sweden, Using Dynamic Time Warping With Barycenter Averaging

Michiel Arts, Daniel Sopher, Mikael Calner, Mikael Erlström, Rohit Samant, Bradley D. Cramer and Anne-Christine Da Silva

The Sedimentary record, Vol.23(1), pp.1-16

01/05/2026

DOI: 10.2110/001c.147894

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Abstract

Studies of the Silurian sequence on Gotland have significantly advanced our understanding of Silurian climate dynamics, with much of the research focusing on small outcrops and short cores. Gotland has an extensive network of abandoned oil and gas wells. Most of these include gamma-ray well logs, which have not yet been fully utilised for their stratigraphic value. While the Ordovician succession has been successfully correlated using these well logs, the correlation for the Silurian succession has yet to be fully realised. The present study addresses some of the limitations of correlations performed using Dynamical Time Warping (DTW) by combining DTW with Barycenter Averaging (DBA). This enables a semi-automated correlation of the Silurian well-logs over a ~60 km-long transect and the subdivision of gamma-ray log logs into parts that can be linked with their lithostratigraphic surface counterparts. Additionally, we tracked changes in gamma-ray logs associated with these subsurface units, providing new insights into biogeochemical events (e.g., δ¹³C excursions) previously mapped only at the surface of Gotland. Our results demonstrate the application of a DTW/DBA-based workflow for stratigraphic correlation and highlight the potential to integrate subsurface well-log data to refine Silurian stratigraphy on Gotland.

Details

Title: Subtitle: Semi-automated Correlation of Silurian Well-Logs Across Gotland, Sweden, Using Dynamic Time Warping With Barycenter Averaging
Creators: Michiel Arts - University of Liège
Daniel Sopher - Geological Survey of Sweden
Mikael Calner - Lund University
Mikael Erlström - Lund University
Rohit Samant - University of Münster
Bradley D. Cramer - University of Iowa
Anne-Christine Da Silva - University of Liège
Resource Type: Journal article
Publication Details: The Sedimentary record, Vol.23(1), pp.1-16
DOI: 10.2110/001c.147894
ISSN: 1543-8740
eISSN: 1543-8740
Language: English
Date published: 01/05/2026
Academic Unit: International Programs; School of Earth, Environment, and Sustainability
Record Identifier: 9985116067102771

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