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Data processing

Patent ·
OSTI ID:6909600

A method is described for determining the phase misalignment between at least a first part of a first sinusoidal waveform and at least a first part of a second sinusoidal waveform. The first sinusoidal waveform and the second sinusoidal waveform are produced in response to the reception of seismic energy from a seismic source by an array of seismic detectors. The method comprises: (a) selecting data points in the first part of the first sinusoidal waveform and the first part of the second sinusoidal waveform, wherein the plurality of data points are equally spaced apart; (b) assigning a quadrant value to each data point selected in step (a) for the first sinusoidal waveform and the second sinusoidal waveform. A first quadrant value is assigned to a data point if the data point has a positive amplitude and a positive slope. A second quadrant value is assigned to a data point if the data point has a positive amplitude and a negative slope. A third quadrant value is assigned to a data point if the data point has a negative amplitude and a negative slope and wherein a fourth quadrant value is assigned to a data point if the data point has a negative amplitude and a positive slope; and (c) selecting a first window for the first part of the first sinusoidal waveform and the first part of the second sinusoidal waveform.

Assignee:
Phillips Petroleum Co., Bartlesville, OK
Patent Number(s):
US 4635239
OSTI ID:
6909600
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)
ALIGNMENT
AMPLITUDES
CORRECTIONS
CORRELATIONS
DATA PROCESSING
GEOLOGIC DEPOSITS
GEOPHYSICAL SURVEYS
MEASURING INSTRUMENTS
MINERAL RESOURCES
NATURAL GAS DEPOSITS
OPENINGS
PETROLEUM DEPOSITS
PROCESSING
RESOURCES
SEISMIC ARRAYS
SEISMIC DETECTORS
SEISMIC SURVEYS
SEISMIC WAVES
SPACE DEPENDENCE
SURVEYS
WAVE FORMS
WINDOWS