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Method of interpreting seismic data

Patent ·
OSTI ID:6470122
; ;

This patent describes seismic exploration of a subsurface formation wherein seismic source are activated at spaced locations along a line of exploration and the amplitude of reflections are recorded as a function of time along the lines to produce a series of seismic traces, a method of compensating the amplitude spectrum of a selected one of the seismic traces for the effects of non-white reflectivity of the subsurface formation comprising: whitening effective reflectivity of the amplitude spectrum of the selected seismic trace; reducing the effects of reflectivity leakage on the amplitude spectrum of the selected seismic trace, the step of reducing the effects of reflectivity leakage further including the steps of transforming the amplitude spectrum from the frequency domain into the frequency domain, selecting a first cepstral window length, applying first cepstral window to the frequency domain amplitude spectrum, and transforming the amplitude spectrum from the frequency domain to the frequency domain; compensating the amplitude spectrum of the selected seismic trace to approximate that of an analog seismic wavelet; and smoothing the compensated amplitude spectrum to eliminate rapidly varying components. The step of smoothing the compensated amplitude spectrum further including the steps of transforming the amplitude from the frequency domain into the frequency domain, selecting a second cepstral window length, applying the second cepstral window to the frequency domain amplitude spectrum, and transforming the amplitude spectrum from the frequency domain to the time domain.

Assignee:
Mobil Oil Corp., New York, NY
Patent Number(s):
US 4780859
OSTI ID:
6470122
Country of Publication:
United States
Language:
English

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Related Subjects

02 PETROLEUM
020200* -- Petroleum-- Reserves
Geology
& Exploration
03 NATURAL GAS
030200 -- Natural Gas-- Reserves
Geology
& Exploration
99 GENERAL AND MISCELLANEOUS
990220 -- Computers
Computerized Models
& Computer Programs-- (1987-1989)
COMPUTER CALCULATIONS
DATA PROCESSING
EXPLORATION
GEOLOGIC DEPOSITS
GEOPHYSICAL SURVEYS
MEASURING INSTRUMENTS
MINERAL RESOURCES
NATURAL GAS DEPOSITS
OPTICAL PROPERTIES
PETROLEUM DEPOSITS
PHYSICAL PROPERTIES
PROCESSING
REFLECTIVITY
RESOURCES
SEISMIC ARRAYS
SEISMIC DETECTORS
SEISMIC SOURCES
SEISMIC SURVEYS
SEISMIC WAVES
SURFACE PROPERTIES
SURVEYS