1887

Abstract

Summary

Distributed Acoustic Sensing (DAS) technology enables advanced geophysical measurement methods, where the fibre optic cable is deployed as a dense, wide-aperture phase-array sensor in novel configurations. A sensing system has recently been developed that combines an engineered fiber, incorporating bright scatter centers, with a low-noise, wide dynamic-range optoelectronics DAS interrogator. This new DAS sensing system with engineered fiber offers a 20dB (100x) improvement in sensitivity and a wider dynamic range compared to that achieved with standard fiber. The step-change in the performance seeks to disrupt conventional geophysical surveying methods by combing seismic, microseismic and low frequency strain measurements, and so enabling a practical method for reservoir monitoring. In offshore applications, the permanent installation of the fiber optic along production and injection wells is enabling more frequent and cost-effective seismic data to be acquired. The next challenge is stepping out to subsea wells. We present some initial lab results demonstrating the benefits of the engineered fiber for advanced seismic acquisition in long-tie back subsea wells using only surface optoelectronics.

Loading

Article metrics loading...

/content/papers/10.3997/2214-4609.201900006
2019-05-19
2019-12-15
Loading full text...

Full text loading...

References

  1. Collette, C., ArtoosK., GuinchardM., JanssensS., FernandezP. C. and C.Hauviller
    [2011] Review of sensors for low frequency seismic vibration measurement. No. CERN-ATS-Note-2011-001 TECH.
    [Google Scholar]
  2. LeeC., YangJ. , ChrismanR., Van GestelJ., BensonM.
    , [2018] 3D VSP imaging under a complex salt finger at Atlantis, Gulf of Mexico, SEG International Exposition and 88th Annual Meeting.
    [Google Scholar]
  3. LopezJ. L., MateevaA., ChalenskiD. and Przybysz-JarnutJ.
    , [2017] Valuation of DAS VSP for Frequent Monitoring in Deepwater, SEG International Exposition and 87th Annual Meeting, pp.6044–6048.
    [Google Scholar]
  4. Madsen, K. N., DümmongS., ParkerT., FinferD. P. N. TravisP.N., BostickT., and M.Thompson M.
    , [2013] Simultaneous multiwell VSP using distributed acoustic sensing: Presented at Second EAGE Workshop on Borehole Geophysics, 3D VSP.
    [Google Scholar]
  5. ParkerT., ShatalinS. and FarhadiroushanM.
    [2014] Distributed Acoustic Sensing – a new tool for seismic applications, EAGE First Break volume 32, pp. 61–69.
    [Google Scholar]
http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.201900006
Loading
/content/papers/10.3997/2214-4609.201900006
Loading

Data & Media loading...

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error