Patent ID: 9739904
Date: 2017-08-22
CPC Classifications: E21B,G01S,G01V

Claim:
1. An apparatus for estimating a fraction of each component of a fluid of interest flowing in a cased borehole and a property of the fluid, the apparatus comprising: a carrier configured to be conveyed through the cased borehole; an acoustic waveguide sensor disposed on the carrier, the acoustic waveguide sensor comprising a waveguide configured to guide an acoustic signal along a path of the waveguide and an array of acoustic transducers coupled to the waveguide and configured to transmit an acoustic signal and receive a return acoustic signal, the acoustic waveguide sensor being configured to (i) transmit and receive a compression-wave acoustic signal that is reflected off of the casing and (ii) transmit and receive a shear-wave acoustic signal that propagates along the path of the waveguide; and a controller coupled to the acoustic waveguide sensor and configured to perform a compression-wave acoustic measurement on the fluid using the acoustic waveguide sensor in order to estimate the fraction of each component of the fluid and to perform a shear-wave acoustic measurement in order to estimate the property of the fluid.