Method and apparatus for sonic dip measurement

Patent · Tue Apr 17 00:00:00 EDT 1990

OSTI ID:6755478

Chemali, R E; Maki, Jr, V E

This patent describes a method for determining the dip in each formations traversed by a borehole. It comprises: transmitting acoustic energy in the frequency range of 100 to 200 kilohertz through a formation radially with respect to the axis of a borehole from at least three angularly spaced points relative to the borehole axis; generating first and second electrical receiver signals, representative of and in response to the arrival of acoustic energy at first and second longitudinally spaced locations from each respective transmission point. At each of the three angularly spaced points wherein the first and second locations are spaced vertically by a spacing distance of one inch or less, the spacing distance being chosen to be about one wavelength or less of acoustic energy at the highest operating frequency of 200 kHz in the slowest expected formation to be encountered; and measuring the difference in elapsed time between the arrival of the first and second acoustic signals at each of the three angularly space points.

• Assignee: Halliburton Logging Services, Inc., Houston, TX (USA)
• Patent Number(s): US 4918669; A
• Application Number: PPN: US 7-385045A
• OSTI ID: 6755478
• Resource Relation: Patent File Date: 26 Jul 1989
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
03 NATURAL GAS
47 OTHER INSTRUMENTATION
NATURAL GAS DEPOSITS
SONIC LOGGING
PETROLEUM DEPOSITS
WELL LOGGING EQUIPMENT
SIGNAL CONDITIONING
EXPLORATION
SOUND WAVES
EQUIPMENT
GEOLOGIC DEPOSITS
MINERAL RESOURCES
RESOURCES
WELL LOGGING
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030200 - Natural Gas- Reserves
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440700 - Geophysical & Meteorological Instrumentation- (1990-)