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Method of seismic exploration including processing and displaying seismic data to quantitatively distinguish among seismic events

Patent ·
OSTI ID:7097663
; ; ;
A method is described of seismic exploration including processing a seismic signals to quantitatively distinguish among seismic events, comprising the steps of: obtaining an incident angle ordered gather of seismic signals; obtaining a measure of the reflection coefficient as a function of incident angle for selected seismic events within the incident angle ordered gather of seismic signals; and developing sets of attributes descriptive of variations in the amplitude of the seismic signal as a function of incident angle from the reflection coefficient to quantitatively distinguish among seismic events. A method is also described for aligning and obtaining a measure of seismic signal amplitude of seismic signals as a function of incident angle for selected seismic events comprising the steps of: sorting offset seismic signals into gathers of ordered incident angle; forming a reference seismic signal from the incident angle gather of offset signals; cross-correlating a segment of the reference seismic signal containing the selected seismic event with a segment of the corresponding gather of offset seismic signals, the position of maximum cross-correlation on each offset seismic signal being a primary offset event position; averaging the lobe amplitude of each offset seismic signal within a prescribed time window of the offset primary event position; and forming ordered pairs of average lobe amplitudes and corresponding primary offset positions.
Assignee:
Standard Oil Co., Chicago, IL
Patent Number(s):
US 4646239
OSTI ID:
7097663
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
58 GEOSCIENCES
580203 -- Geophysics-- Geophysical Survey Methods-- (1980-1989)
AMPLITUDES
DATA PROCESSING
EXPLORATION
GEOLOGIC DEPOSITS
GEOPHYSICAL SURVEYS
INCIDENCE ANGLE
MINERAL RESOURCES
NATURAL GAS DEPOSITS
PETROLEUM DEPOSITS
PROCESSING
REFLECTION
RESOURCES
SEISMIC SURVEYS
SIGNALS
SURVEYS