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In-Situ Laboratory: A research site facility for integrated and permanent fibre optic sensing monitoring
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, EAGE GeoTech 2021 Second EAGE Workshop on Distributed Fibre Optic Sensing, Mar 2021, Volume 2021, p.1 - 5
Abstract
Distributed temperature (DTS) and distributed acoustic (DAS) fibre optic sensing have been permanently deployed for downhole monitoring at the In-Situ Laboratory (ISL) in Western Australia. This site, primarily developed for field-scale CO2 controlled-release experiments, was designed as a research facility for remote and 24/7 monitoring using fibre optic sensing technology with a minimum footprint and low maintenance requirements. DTS, DAS combined with pressure gauges are instrumenting an injection well, a monitoring well and a shallow groundwater well. The benefit of integrating discrete pressure measurements with distributed temperature and acoustic sensing was demonstrated over the lifetime of the site. This paper presents such benefits through examples and case studies. DTS enabled continuous recording from the well completion (monitoring of mud circulation and cement hydration) to CO2 injection operations (detection of underground CO2 motion), while DAS allowed for an accurate spatial-temporal location of expected or unexpected events, such as air-lift operations