Dynamic detection of anomalous regions within distributed acoustic sensing data streams using locally stationary wavelet time series

Rebecca Wilson, Idris A. Eckley, Matthew Nunes, Timothy Park

Research output: Contribution to journalArticle

Abstract

Distributed acoustic sensing technology is increasingly being used to support production and well management within the oil and gas sector, for example to improve flow monitoring and production profiling. This sensing technology is capable of recording substantial data volumes at multiple depths within an oil well, giving unprecedented insights into production behaviour. However the technology is also prone to recording periods of anomalous behaviour, where the same physical features are concurrently observed at multiple depths. Such features are called `stripes' and are undesirable, detrimentally affecting well performance modelling. This paper focuses on the important challenge of developing a principled approach to identifying such anomalous periods within distributed acoustic signals. We extend recent work on classifying locally stationary wavelet time series to an online setting and, in so doing, introduce a computationally-efficient online procedure capable of accurately identifying anomalous regions within multivariate time series.
Original languageEnglish
Pages (from-to)748-772
Number of pages25
JournalData Mining and Knowledge Discovery
Volume33
Issue number3
Early online date20 Feb 2019
DOIs
Publication statusPublished - 15 May 2019

Keywords

  • Coherence
  • Distributed acoustic sensing
  • Dynamic classification
  • Locally stationary time series
  • Stripe detection
  • Wavelets

ASJC Scopus subject areas

  • Information Systems
  • Computer Science Applications
  • Computer Networks and Communications

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