Distributed Acoustic Sensing (DAS) is a relatively novel technology, which uses a fibre-optic cable as sensor. Advantages are that the cable is passive, it does not have separate detectors and the channel spacing can be set by the instrument. DAS has already found applications in monitoring of hydraulic fracturing and VSPs. A downside is that a straight fibre has no broadside sensitivity and can therefore not be used for reflection seismic with horizontal cables. A helically wound cable (HWC) solves that problem; the video describes a field trial, which confirms the theoretically expected isotropic sensitivity of the HWC for P-waves.
This video is part of EAGE Online Education Programme.
The European Association of Geoscientists and Engineers (EAGE) is a global professional, non-profit association for geoscientists and engineers. EAGE strives to promote innovation and technical progress and aims to foster communication and cooperation between those working in, studying or interested in these fields. To learn more about EAGE Education visit www.LearningGeoscience.org
22 авг 2024
