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Applications and Possibilities in Real-time Overburden Surveillance Using Permanent Seismic Sensors
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, EAGE/SEG Research Workshop 2017, Aug 2017, cp-522-00023
- ISBN: 978-94-6282-222-1
Abstract
There is an undeniable need in monitoring of oil and gas operating fields for HSE purposes and optimization of recovery. Currently, only seismic methods provide high resolution images to properly locate subsurface changes. Passive seismic data acquired with permanent seismic receivers could enable us to monitor the subsurface and detect changes in real-time. Hence, by maturing methods to analyse and use passive seismic data in real-time, we aim to improve our understanding of the subsurface, detect problems early, and therefore support mitigating measures to reduce the possible imposed risk. PRM systems can provide real-time seismic data A workflow is presented to continuously analysis passive seismic data for an overburden surveillance, ensuring that only analysed data get deleted. This approach should allow handling more PRM data in the future. The initial experiences gained from the small caprock monitoring system at Oseberg (Bussat et al. 2016), are being transferred to a full-field PRM system with thousands of nodes. New mini-PRM installations for different purposes at various fields are being evaluated and one possible sparse receiver-layout is presented to mitigate problems with strong (platform) noise in the vicinity. Ongoing efforts will investigate the full potential of passive seismic methods in the near future.