Method and apparatus for combined cement bond and acoustic well logging

Patent · Mon Jan 21 23:00:00 EST 1985

OSTI ID:5721138

Smith, J R. E.

Method and apparatus are provided for measuring acoustic signals having amplitudes of widely varying magnitude during one traversal of the borehole corresponding to indications of cement bonding along a casing as well as acoustic travel time through an increment of the formation. Variable attenuators are provided associated with acoustic receivers disposed within the logging sonde wherein attenuation may be automatically adjusted as a function of acoustic transmitter-receiver trigger pulses transmitted downhole, depending upon whether a cement bond or other log of acoustic signal information having a substantially different magnitude is desired.

• Assignee: Dresser Industries Inc.
• Patent Number(s): US 4495606
• OSTI ID: 5721138
• 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
ACOUSTIC MEASUREMENTS
AMPLITUDES
BUILDING MATERIALS
CEMENTING
CEMENTS
EQUIPMENT
MATERIALS
MEASURING METHODS
NATURAL GAS WELLS
OIL WELLS
PROBES
SONIC LOGGING
SONIC PROBES
WELL COMPLETION
WELL LOGGING
WELL LOGGING EQUIPMENT
WELLS