Method for estimating shear wave reflection data from acquired compressional wave reflection data
This patent describes a method of producing shear wave reflection information estimated from compressional wave reflection information. It comprises the steps of: generating descending acoustic waves; gathering recorded reflection waves into sets of different source-receiver offsets having a common reflection boundary; correcting gathered reflection waves for normal moveout; measuring amplitudes of gathered waves at given points in time; determining velocities of the acoustic wave at the top of and within the earth medium below each of the subsurface interfaces, averaging the velocities and interpolating with time to provide smoothed interval velocity functions for gathered traces over the subsurface interfaces; determining incident angles of gathered traces; and determining from the measured amplitude offset values and incident angles of the gathered trace shear wave reflection information that is equivalent to shear wave reflection information that would be obtained by direct measurement using shear waves.
- Assignee:
- Mobil Oil Corp., New York, NY
- Patent Number(s):
- US 4858201
- Application Number:
- PPN: US 7099446A
- OSTI ID:
- 5394282
- Country of Publication:
- United States
- Language:
- English
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03 NATURAL GAS
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DATA PROCESSING
EQUIPMENT
EXPLORATION
GEOLOGIC DEPOSITS
MINERAL RESOURCES
NATURAL GAS DEPOSITS
PETROLEUM DEPOSITS
PROCESSING
RESOURCES
SONIC LOGGING
SOUND WAVES
WAVE PROPAGATION
WELL LOGGING
WELL LOGGING EQUIPMENT