Intelligent monitoring system for real-time geologic storage, optimization, and reservoir management

Technical Report DOE-USGS-FE0026517-1
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Abstract

The objective of the subtask was to develop a near-real-time monitoring system for seismic data at the Decatur, IL, geologic carbon sequestration (GCS) site and specifically include fiber-optic cable derived distributed acoustic signal (DAS) data in the process. Owing to the large volumes of data, we opted to utilize existing deep borehole conventional seismic sensors for detection and pull DAS and shallow borehole seismic data once a detection has been made. Unfortunately, the horizontal fiber-optic cables did not yield microseismic signals for use in locating events near the GCS site. Various stacking and filtering approaches were tested without any coherent detection becoming apparent. We attribute the insensitivity to local microseismic events to a lack of coupling in downhole, vertical cable and the non-ideal alignment of the horizontal fiber-optic cable to the vertically polarized seismic energy. Despite the inability to detect and utilize the DAS data from the fiber-optic cables, we developed a general processing framework that enables easy adaptation for future deployment of fiber-optic cables with better suited alignment at Decatur or elsewhere.

Publication type Report
Publication Subtype Federal Government Series
Title Intelligent monitoring system for real-time geologic storage, optimization, and reservoir management
Series title Technical Report
Series number DOE-USGS-FE0026517-1
DOI 10.2172/1834620
Year Published 2021
Language English
Publisher Department of Energy
Contributing office(s) Earthquake Science Center
Description 24 p.
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