Multi-phase flow-monitoring with an optical fiber distributed acoustic sensor

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United States of America Patent

PATENT NO 11768179
APP PUB NO 20210072190A1
SERIAL NO

17102221

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Abstract

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Embodiments of the invention provide a “tool-kit” of processing techniques which can be employed in different combinations depending on the circumstances. For example, flow speed can be found using eddy tracking techniques, or by using speed of sound measurements. Moreover, composition can be found by using speed of sound measurements and also by looking for turning points in the k-w curves, particularly in stratified multi-phase flows. Different combinations of the embodiments can therefore be put together to provide further embodiments, to meet particular flow sensing requirements, both on the surface and downhole. Once the flow speed is known, then at least in the case of a single phase flow, the flow speed can be multiplied by the interior cross-sectional area of the pipe to obtain the flow rate. The mass flow rate can then be obtained if the density of the fluid is known, once the composition has been determined.

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Patent Owner(s)

Patent OwnerAddress
CHEVRON U S A INC6001 BOLLINGER CANYON ROAD SAN RAMON CA 94583
SILIXA LIMITEDELSTREE HERTFORDSHIRE WD6 3SN

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Amir, Mohammad Elstree, GB 4 8
Farhadiroushan, Mahmoud Elstree, GB 52 901
Finfer, Daniel Elstree, GB 17 322
Mahue, Veronique Elstree, GB 9 67
Parker, Tom Elstree, GB 33 971

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