Patent ID: 11874145
Assignee: BAKER HUGHES OILFIELD OPERATIONS LLC
Field: Measurement (Instruments)
Classification: CPC G  E | IPC E  G

Claim 8:
9. A method for obtaining an acoustic measurement in a wellbore, comprising:
transmitting a pulse of light from a light source at a central wavelength into a first end of an optical fiber, the optical fiber having a plurality of enhancement scatterers spaced along a length of the optical fiber, each of the plurality of enhancement scatterers reflecting the light signal at the central wavelength, wherein a longitudinal density of the enhancement scatterers decreases with a distance from the first end to increase a signal enhancement generated by enhancement scatterers distal from the first end; and
receiving a reflection of the light pulse from the enhancement scatterers at a detector at the first end to determine the acoustic signal.