Automated Processing of a Large-Scale Airborne Electromagnetic Survey by Deep Learning

Research output: Contribution to conferencePaperResearchpeer-review

Abstract

Modern airborne electromagnetic (AEM) surveys generate large data sets spanning over thousands of line kilometres. Some portions of these data sets are often unusable due to couplings with infrastructure, such as power lines and fences. The inversion of coupled data results in spurious subsurface features, which may give erroneous geological interpretations and, in turn, biased decisionmaking. To mitigate this, the corrupted data are often culled manually before inversion, which is a labour-intensive and time-consuming task, and requires specialized expertise. To address this challenge, we have developed a deep learning expert system that automates the AEM data processing workflows. Our method employs a deep convolutional auto-encoder to identify corrupted data and is designed to generalize across diverse geological conditions and survey areas. In this study, we evaluate the generalization performance of our method on a large AEM survey conducted in Northland, New Zealand. Our approach processes 6471 line kilometres of data in 15 minutes and identifies corrupted data, showing strong spatial correlation. The inversion results reveal very few potential anomalies, which are undergoing manual inspection. Overall, our proposed approach demonstrates high-quality data processing with minimal quality inspection required, making it a promising solution to automate AEM data processing workflows.

Original languageEnglish
Publication date2023
Number of pages5
DOIs
Publication statusPublished - 2023
EventNSG2023 29th European Meeting of Environmental and Engineering Geophysics - Edinburgh , United Kingdom
Duration: 3 Sept 20237 Sept 2023
Conference number: 29

Conference

ConferenceNSG2023 29th European Meeting of Environmental and Engineering Geophysics
Number29
Country/TerritoryUnited Kingdom
CityEdinburgh
Period03/09/202307/09/2023

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