Flexural wave measurement for thick casings

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United States of America Patent

PATENT NO 11473419
APP PUB NO 20180328163A1
SERIAL NO

15973839

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Abstract

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Systems and methods are provided for obtaining a flexural-attenuation measurement for cement evaluation that may be effective even for wells with relatively thick casings. A method includes emitting an acoustic signal at a casing in a well that excites the casing into generating an acoustic response signal containing acoustic waves, such as Lamb waves. The Lamb waves include flexural waves and extensional waves. The casing may be relatively large, having a thickness of at least 16 mm. The acoustic response signal may be detected and filtered to reduce a relative contribution of the extensional waves. This may correspondingly increase a relative contribution of the flexural waves. The filtered acoustic response signal may be used as a flexural-attenuation measurement for cement evaluation.

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Patent Owner(s)

Patent OwnerAddress
SCHLUMBERGER TECHNOLOGY CORPORATION300 SCHLUMBERGER DRIVE SUGAR LAND TX 77478

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Brill, Thilo Clamart, FR 4 151
Hayman, Andrew Voisins-le-Bretonneux, FR 15 181
Klieber, Christoph Paris, FR 10 28
Le, Calvez Jean-Luc Clamart, FR 13 83

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