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

Arts, Michiel ; Sopher, Daniel ; Calner, Mikael LU orcid ; Erlström, Mikael LU ; Samant, Rohit ; Cramer, Bradley D. and Da Silva, Anne Christine (2025) In Sedimentary Record 23(1).
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... (More)

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.

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author
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organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Barycenter Averaging, Dynamic Time Warping, gamma-ray well logs, Silurian, subsurface correlation
in
Sedimentary Record
volume
23
issue
1
external identifiers
  • scopus:105027754465
DOI
10.2110/001c.147894
language
English
LU publication?
yes
id
7d21a059-722a-4b69-a207-9e73f08260ad
date added to LUP
2026-02-27 10:28:21
date last changed
2026-02-27 11:33:58
@article{7d21a059-722a-4b69-a207-9e73f08260ad,
  abstract     = {{<p>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., δ<sup>13C</sup> 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.</p>}},
  author       = {{Arts, Michiel and Sopher, Daniel and Calner, Mikael and Erlström, Mikael and Samant, Rohit and Cramer, Bradley D. and Da Silva, Anne Christine}},
  keywords     = {{Barycenter Averaging; Dynamic Time Warping; gamma-ray well logs; Silurian; subsurface correlation}},
  language     = {{eng}},
  number       = {{1}},
  series       = {{Sedimentary Record}},
  title        = {{Semi-automated Correlation of Silurian Well-Logs Across Gotland, Sweden, Using Dynamic Time Warping With Barycenter Averaging}},
  url          = {{http://dx.doi.org/10.2110/001c.147894}},
  doi          = {{10.2110/001c.147894}},
  volume       = {{23}},
  year         = {{2025}},
}