Shear wave logging using guided waves

Patent · Tue Sep 27 00:00:00 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
• Resource Relation: Patent File Date: Filed date 3 Jan 1983
• Country of Publication: United States
• Language: English

Related Subjects

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