Halliburton Energy Services, Inc.

Sensortran, Inc.

Other

Shell Internationale Research Maatschappij, B.v.

Kari-Mikko Jaaskelainen

Kent Kalar

David Andrew Barfoot

Brian Vandellyn Park

Ian Bradford Mitchell

Henry Clifford Bland

Brian Kelly McCoy

Mohammed Fassih-Nia

Benjamin M Banack

Mahesh U Algaonkar

Mahesh U Ajgaonkar

Andre Franzen

Brian Kelly Mccoy

William Birch

Johannis Josephus Den Boer

Crispin Thomas Doyle

Christopher Barry Staveley

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.

Distributed seismic sensing for in-well monitoring

An illustrative distributed sensing system includes a fiberoptic cable, a transmitter module, and a receiver module. The transmitter module is coupled to the fiberoptic cable to communicate light in each of multiple independent paths to each of multiple positions along the cable, The receiver module is coupled to the fiberoptic cable to receive backscattered light from said multiple positions along the cable via the multiple independent paths. The receiver module includes at least one receiver for each of said multiple independent paths to obtain simultaneous measurements for each of said multiple positions. The multiple independent paths may be provided by wave division multiplexing, frequency division multiplexing, spatial mode division multiplexing, multicore fiber, and/or multiple fibers.

Robust optical fiber-based distributed sensing systems and methods

A method of improving sampling resolution in a distributed temperature measurement system using a fiber optic distributed sensor by means of programmed delayed trigger signals to a laser light source in order to improve the spatial resolution of such systems.

High sampling resolution DTS system and method

A system and method using both static and transient modeling of power cables coupled with real time measurements of distributed temperature profiles of both the cable and it's immediate environment to optimize the current loads of the power cable. The optical fibers used for measuring distributed temperature profiles can be integrated directly into the monitored power cables or be deployed alongside the power cables, including using the optical fibers deployed in optical power ground wire systems.

System and method for determining characteristics of power cables using distributed temperature sensing systems

High resolution distributed temperature sensors using fiber optic distributed temperature sensing systems deployed on various carriers to significantly improve spatial resolution and provide high resolution temperature profile and detection of fluid or fluid interface levels.

High spatial resolution fiber optic temperature sensor

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Katy, TX, United States of America

Kari-Mikko Jaaskelainen