Category: Technical Papers

23 Sep 2011

Field Trials of DAS For Geophysical Monitoring

Summary

Distributed Acoustic Sensing (DAS), a rapidly evolving fiber-optic based technology for permanent in-well and geophysical monitoring, was used to record VSP data in two field trials in Shell assets onshore Canada and USA. Useful in-well velocity data were gathered from the entire length of the well from wellhead to TD (up to 4 km), which compared well with geophone recording and sonic log data. Walk-away VSP data yield images that are nearly equivalent to images from conventional borehole geophones in terms of signal to noise ratio and resolution. Permanently installed fiber-optic infrastructure will enable low-cost non-intrusive geophysical monitoring.

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05 Jan 2011

Completions : First Downhole Application of Distributed Acoustic Sensing (DAS) for Hydraulic Fracturing Monitoring and Diagnostics

Oil Field Services

Molenaar, M.M., Hill, D.J., Webster, P., Fidan, E., Birch, B., ‘First Downhole Application of Distributed Acoustic Sensing (DAS) for Hydraulic Fracturing Monitoring and Diagnostics’. Paper SPE 140561,  Presented at the SPE Hydraulic Fracturing Technology Conference, The Woodlands, Texas, January  2011

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