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Title: Methods for processing converted wave seismic data

Abstract

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.

Inventors:
Publication Date:
OSTI Identifier:
5497567
Patent Number(s):
US 4839869
Assignee:
Shell Oil Co., Houston, TX
Resource Type:
Patent
Resource Relation:
Patent File Date: 6 Oct 1986
Country of Publication:
United States
Language:
English
Subject:
02 PETROLEUM; 03 NATURAL GAS; 58 GEOSCIENCES; SEISMIC DETECTORS; DATA PROCESSING; COMPUTER GRAPHICS; EXPLORATION; GEOLOGIC MODELS; NATURAL GAS DEPOSITS; PETROLEUM DEPOSITS; RESOLUTION; SEISMIC SURVEYS; GEOLOGIC DEPOSITS; GEOPHYSICAL SURVEYS; MEASURING INSTRUMENTS; MINERAL RESOURCES; PROCESSING; RESOURCES; SEISMIC ARRAYS; SURVEYS; 020200* - Petroleum- Reserves, Geology, & Exploration; 030200 - Natural Gas- Reserves, Geology, & Exploration; 580203 - Geophysics- Geophysical Survey Methods- (1980-1989)

Citation Formats

Corcoran, C T. Methods for processing converted wave seismic data. United States: N. p., 1989. Web.
Corcoran, C T. Methods for processing converted wave seismic data. United States.
Corcoran, C T. Tue . "Methods for processing converted wave seismic data". United States.
@article{osti_5497567,
title = {Methods for processing converted wave seismic data},
author = {Corcoran, C T},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1989},
month = {6}
}