Acoustic dipole shear wave logging device

Patent · Tue Aug 12 04:00:00 EDT 1986

OSTI ID:5248271

Winbow, G A; Chen, S T

A method is described of logging the earth surrounding a wall wherein an elongated member having two ends with at least one end attached to a housing which is lowered into a fluid contained by the well. The method consists of the sequential step of: determining the approximate range of shear wave velocities of the earth surrounding the fluid; vibrating the unattached portion of the elongated member to create in the fluid a positive compressional wave in one direction and simultaneously a negative compressional wave in the opposite direction. The two compressional waves interfere to produce a dipole shear wave in the earth surrounding the well wherein the frequencies of the dipole shear wave are in the preferred frequency range corresponding to the approximate range of shear wave velocities of the earth surrounding the fluid; detecting at least one selected location spaced longitudinally along the borehole from the member the refracted compressional wave in the fluid caused by refraction of the dipole shear wave.

• Assignee: Exxon Production Research Co., Houston, TX
• Patent Number(s): US 4606014
• OSTI ID: 5248271
• 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
440400 -- Well Logging Instrumentation
47 OTHER INSTRUMENTATION
COMPRESSION
DIPOLES
ELONGATION
EQUIPMENT
FREQUENCY DEPENDENCE
GEOLOGIC DEPOSITS
HOISTING
MATERIALS HANDLING
MECHANICAL VIBRATIONS
MINERAL RESOURCES
MULTIPOLES
NATURAL GAS DEPOSITS
PETROLEUM DEPOSITS
PHASE VELOCITY
REFRACTION
RESOURCES
SEISMIC S WAVES
SEISMIC WAVES
SONIC LOGGING
VELOCITY
WALLS
WAVE PROPAGATION
WELL LOGGING
WELL LOGGING EQUIPMENT