«Geology, geophysics and development of oil and gas fields»

Detection of geological unconformities using DTW-analysis of geophysical well-logging data

UDC: 519.688:550.3:553.9
DOI: -

Authors:

¹ LUKOIL-Engineering LLC, Perm, Russia

Keywords: dynamic time warping algorithm, Dynamic Time Warping (DTW), geological unconformities, well logging, borehole surveys, automation, interwell correlation, stratigraphic disturbances, petroleum geology, stratigraphy

Annotation:

The application of the Dynamic Time Warping (DTW) method for automated detection of geological unconformities using well-logging data is considered. The study describes the mathematical foundation and logic of the DTW algorithm, as well as data preprocessing methods, including median filtering, normalization and moving average smoothing. Special attention is paid to the selection of optimal algorithm parameters and their influence on the analysis results. The importance of multi-variant analysis using different step patterns and smoothing levels to enhance interpretation reliability is highlighted. The results of testing the method on actual gamma-ray logging data from two wells are presented, where four stable zones of geological unconformities were successfully identified. The research demonstrates that combining DTW analysis with comprehensive data interpretation significantly improves the objectivity and reproducibility of results in the interpretation of geological disturbances. The proposed approach can be useful for automating the processing of large volumes of well-logging data in petroleum geology and other fields of geological exploration.

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