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Title: Seismic raytracing method and apparatus

Abstract

This patent describes a seismic signal analysis method for evaluating a property of a subterranean layer within a zone of interest containing outer layers. It includes impressing a pressure wave on the zone of interest from a source located displaced from the zone of interest; placing a plurality of detectors each capable of sensing a pressure wave affected by at least a portion of the layer and producing a data signal, wherein at least one of the detectors is spaced apart from the source; detecting a plurality of the data signals from the sensors to form an actual sensed data set, wherein the data signals are above a first threshold amplitude; constructing an initial numerical model of the zone of interest; calculating synthetic pressure waves and a synthetic data set from the model, wherein the calculations are limited to synthetic waves having greater than a second threshold amplitude, wherein the second threshold amplitude is based upon the first threshold amplitude over a range of frequencies and the calculating also comprises paired ray-tracing and interpolation between the paired ray-tracing.

Inventors:
; ;
Publication Date:
OSTI Identifier:
5539560
Patent Number(s):
US 5079749; A
Application Number:
PPN: US 7-534464
Assignee:
Union Oil Co. of California, Los Angeles, CA (United States)
Resource Type:
Patent
Resource Relation:
Patent File Date: 6 Jun 1990
Country of Publication:
United States
Language:
English
Subject:
04 OIL SHALES AND TAR SANDS; 02 PETROLEUM; RESERVES; SEISMIC DETECTION; EQUIPMENT; AMPLITUDES; INTERPOLATION; LAYERS; MATHEMATICAL MODELS; NUMERICAL SOLUTION; SIGNALS; THRESHOLD ENERGY; DETECTION; ENERGY; RESOURCES; 040200* - Oil Shales & Tar Sands- Reserves, Geology, & Exploration; 020200 - Petroleum- Reserves, Geology, & Exploration

Citation Formats

Amionzadeh, F, Von Kahrs, C K, and Wrolstad, K H. Seismic raytracing method and apparatus. United States: N. p., 1992. Web.
Amionzadeh, F, Von Kahrs, C K, & Wrolstad, K H. Seismic raytracing method and apparatus. United States.
Amionzadeh, F, Von Kahrs, C K, and Wrolstad, K H. Tue . "Seismic raytracing method and apparatus". United States.
@article{osti_5539560,
title = {Seismic raytracing method and apparatus},
author = {Amionzadeh, F and Von Kahrs, C K and Wrolstad, K H},
abstractNote = {This patent describes a seismic signal analysis method for evaluating a property of a subterranean layer within a zone of interest containing outer layers. It includes impressing a pressure wave on the zone of interest from a source located displaced from the zone of interest; placing a plurality of detectors each capable of sensing a pressure wave affected by at least a portion of the layer and producing a data signal, wherein at least one of the detectors is spaced apart from the source; detecting a plurality of the data signals from the sensors to form an actual sensed data set, wherein the data signals are above a first threshold amplitude; constructing an initial numerical model of the zone of interest; calculating synthetic pressure waves and a synthetic data set from the model, wherein the calculations are limited to synthetic waves having greater than a second threshold amplitude, wherein the second threshold amplitude is based upon the first threshold amplitude over a range of frequencies and the calculating also comprises paired ray-tracing and interpolation between the paired ray-tracing.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1992},
month = {1}
}