Patent ID: 8321133
Filing Date: 2012-11-27
Classification: E21B,G01N,G01V

Abstract:
1. A borehole logging tool for facilitating analysis of fluids in subterranean formations, the tool comprising: a tube having a cavity configured to be filled with a fluid; at least one acoustic source disposed at a first axial position of the tube and operable to generate at least one acoustic signal comprising a tube wave, which is propagated in an axial direction through the fluid in the cavity of the tube; at least one acoustic receiver disposed at a second axial position of the tube different from the first axial position and operable to receive a first received acoustic signal in response to the at least one acoustic signal generated by the at least one acoustic source; circuitry operative to (1) compare a characteristic of the first received acoustic signal and a second signal to calculate tube wave data based on the comparison and (2) calculate a free field sound speed of the fluid based on the tube wave data.