Distributed seismic sensing for in-well monitoring

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United States of America Patent

PATENT NO 10295690
APP PUB NO 20160202368A1
SERIAL NO

14912088

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Abstract

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A method and apparatus for seismic sensing is described. The apparatus includes an outer cable coupled to a formation and an outer fiber component proximate to the outer cable. When seismic P- and S-waves propagate from the formation to the outer cable, strain is placed on the outer fiber cable, which may be measured by a distributed acoustic sensing system coupled to the outer fiber cable. An inner cable positioned within the outer cable includes a corresponding inner fiber component. The innerduct between the outer and inner cables is filled with a gas or fluid which allows only P-waves to propagate to the inner cable. Those P-waves induce strain on the inner fiber component, which may be measured by the distributed acoustic sensing system. By measuring the seismic P- and S-waves at the outer fiber component, and the isolated seismic P-wave at the inner fiber component, it is possible to calculate an isolated seismic S-wave measurement. Methods for deploying the seismic sensing apparatus are also described.

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Patent Owner(s)

  • HALLIBURTON ENERGY SERVICES, INC.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Jaaskelainen, Kari-Mikko Katy, US 8 72
Mitchell, Ian B Radford, US 5 13

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