Method and apparatus for acoustic well logging

Details Method and apparatus for acoustic well logging Method and apparatus for acoustic well logging

G - Physics

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G01V 1/40 (2006.01) G01V 1/28 (2006.01) G01V 1/50 (2006.01) G01V 11/00 (2006.01)

Patent

CA 1159944

METHOD AND APPARATUS FOR ACOUSTIC WELL LOGGING Abstract An improved well logging technique is provided for more accurately deriving acoustic measurements of sub- surface earth formations. Method and apparatus are des- cribed for converting an acoustic signature which can be generated on a depth dependent or time dependent basis, into digital format and subsequently employing special processing techniques to yield parameters such as velocity of the transmitted acoustic energy through earth formations and the amplitude of the received acoustic energy. Pro- cessing further allows for the generation of noise immunity signals functionally related to a measured signature para- meter and for the generation of amplitude control signals. Additionally, a control signal is generated to optimize transmitter firing rate.

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