Sonic borehole caliper and related methods

摘要

A method and apparatus for determining an effective cross-sectional area of a borehole including one or more sources for generating tube or Stoneley waves in the borehole; receivers for measuring amplitudes of the waves; and means to relate said measured amplitudes to said effective cross-sectional area or related parameters.

主权项

1. An apparatus for locating a fracture in a borehole, comprising:
a tool body designed to be lowered into the borehole; one or more sources designed to generate in the borehole tube or Stoneley waves; one or more receivers for measuring amplitudes of said waves; a Stoneley or sonic caliper for a first caliper measurement measured by the one or more recievers; a mechanical or ultrasonic caliper for a second caliper measurement; and processors for determining a presence or absence of a fracture based on a difference between the first caliper measurement and the second caliper measurement.