Methods for processing converted wave seismic data

Patent · Tue Jun 13 04:00:00 EDT 1989

OSTI ID:5497567

Corcoran, C T

This patent describes a method for improved resolution of reflection seismic data containing at least converted wave information. The method consists of: providing seismic field records employing known multiple source and receiver locations having a known acquisition geometry, selecting an appropriate layered earth model representative of the areas of interest having known parameters, ray tracing through the model to determine reflection points, two-way travel times, and values representative of signal amplitudes for converted waves, for offsets, determining for the plurality of offsets the variance between each fixed fractional sort points and the determined reflection points projected to the surface for at least one depth range of interest wherein the variance includes amplitude versus offset effects from the determined signal amplitudes and includes the effects of the geometry employed to generate the seismic field records, determining a fixed fractional sort point that minimizes the variance for all the seismic field records in the area of interest, and gathering the field records using the determined fixed fractional sort point.

• Assignee: Shell Oil Co., Houston, TX
• Patent Number(s): US 4839869
• OSTI ID: 5497567
• Country of Publication: United States
• Language: English

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)
COMPUTER GRAPHICS
DATA PROCESSING
EXPLORATION
GEOLOGIC DEPOSITS
GEOLOGIC MODELS
GEOPHYSICAL SURVEYS
MEASURING INSTRUMENTS
MINERAL RESOURCES
NATURAL GAS DEPOSITS
PETROLEUM DEPOSITS
PROCESSING
RESOLUTION
RESOURCES
SEISMIC ARRAYS
SEISMIC DETECTORS
SEISMIC SURVEYS
SURVEYS