Resources Contact Us Home
Sonic well logging for radial profiling

Image Number 16 for United States Patent #6611761.

A method for determining a radial profile of sonic shear velocity of formations surrounding a fluid-containing borehole, including: suspending a logging device in the borehole; transmitting sonic energy from the logging device to establish flexural waves in the formation; receiving sonic energy from the flexural waves and producing, from the received sonic energy, measurement signals at a number of frequencies; determining, at each frequency, the flexural wave velocity in the formation; deriving sonic compressional and shear velocities of the substantially undisturbed formation; deriving sonic compressional velocity of the borehole fluid; and determining the radial profile of sonic shear velocity from the derived compressional and shear velocities of the substantially undisturbed formation, the derived compressional velocity of the borehole fluid, and the flexural wave velocities.

  Recently Added Patents
Resonant oscillator with start up and shut down circuitry
System and method for oscillator frequency control
Method and apparatus for disease diagnosis and screening using extremely low frequency electromagnetic fields
Method of sending CTI messages in a communication system
Cell surface display, screening and production of proteins of interest
Integrated testing circuitry for high-frequency receiver integrated circuits
  Randomly Featured Patents
Cutter head for an excavator machine
Method of manufacturing semiconductor device with an improved wiring layer structure
Reproducing device for frequency modulated signals
Golf ball
Electrically controlled throttle apparatus
Wireless device method and apparatus with drawing command throttling control
One-piece strain relief bushing with independent holding means
Ruler safety lighter
Apparatus for transporting freight