69735

Simultaneous Multiwell VSP using Distributed Acoustic Sensing

Authors: K. N. Madsen, S. Dümmong, A. Kritski, D. Finfer, A. Gillies and P. Travis

Event name: Second EAGE Workshop on Permanent Reservoir Monitoring 2013 – Current and Future Trends

Session: Distributed Acoustics: More than “Unplugged

Publication date: 03 July 2013

DOI: 10.3997/2214-4609.20131304

Copyright: EAGE

Summary

In a collaborative project between Silixa, Weatherford and Statoil, simultaneous multiwell VSP data were successfully acquired using intelligent Distributed Acoustic Sensing (iDAS). The iDAS enables the use of an optic fibre as a massive seismic sensor array. In this field trial the iDAS was retrofitted to existing fibres installed for other purposes.

Simultaneous measurements were carried out using 4 iDAS units retrofitted to fibres in three different wells coming up to the same platform. Several seismic lines were shot, e.g. one above each of the well tracks, while listening in the well directly below the shots and also in neighbouring wells at an angle to the shot line.

All three wells were producing during the trial and the downhole seismic data were acquired without disturbing the well operations. Consequently data hold information about the flow in the well in addition to the seismic information.

Click here to access full paper via the EAGE library