Shear wave logging using guided waves

Patent · Tue Sep 27 04:00:00 EDT 1988

OSTI ID:6683580

Winbow, G A; Chen, S T; Rice, J A

This patent describes a method for acoustically logging an earth formation surrounding a borehole which contains a liquid where the approximate shear wave velocity v of the formation is known. The method consists of: vibrating a dipole source in the liquid to generate in the liquid a guided wave the frequencies of which include a critical frequency f given by zeta = ..nu..12a where a is the borehole radius, so that the fastest component of the guided wave has velocity substantially equal to ..nu..; and detecting the arrival of the fastest component of the guided wave at least one location in the liquid spaced longitudinally along the borehole from the dipole source.

• Assignee: Exxon Production Research Co., Houston, TX
• Patent Number(s): US 4774693
• OSTI ID: 6683580
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020200* -- Petroleum-- Reserves
Geology
& Exploration
03 NATURAL GAS
030200 -- Natural Gas-- Reserves
Geology
& Exploration
DESIGN
EQUIPMENT
NATURAL GAS WELLS
OIL WELLS
PROBES
SHEAR
SONIC LOGGING
SONIC PROBES
SOUND WAVES
WAVE PROPAGATION
WAVEGUIDES
WELL LOGGING
WELL LOGGING EQUIPMENT
WELLS