US 6,662,112 B2Granted

Method for classifying AVO data using an interpreter-trained neural network

AssigneeExxonMobil Upstream Research Company

InventorsJohn E. Eastwood, Brian P. West, Michael D. Gross, Dwight C. Dawson, David H. Johnston

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Abstract

AVO anomalies are classified in near-offset and far-offset seismic data volumes, by first calculating a plurality of initial AVO seismic attributes representative of the offset seismic data volumes. A probabilistic neural network is constructed from the calculated initial AVO seismic attributes. AVO anomaly classifications are calculated in a portion of the offset seismic data volumes. The preceding steps are repeated until the calculated AVO anomaly classifications in the portion of the offset seismic data volumes are satisfactory. AVO anomaly classifications are calculated throughout the offset seismic data volumes using the constructed probabilistic neural network.

Claims8

Dependent claims

A method for classifying AVO anomalies in near-offset and far-offset seismic data volumes, comprising the steps of:

(a) calculating a plurality of initial AVO seismic attributes in the near-offset and far-offset seismic data volumes;
(b) constructing a probabilistic neural network from the calculated initial AVO seismic attributes;
(c) calculating AVO anomaly classifications in a portion of the near-offset and far-offset seismic data volumes, using the constructed probabilistic neural network;
(d) repeating steps (a) through (c) until the calculated AVO anomaly classifications in the portion of the near-offset and far-offset seismic data volumes are satisfactory;
and
(e) calculating AVO anomaly classifications throughout the near-offset and far-offset seismic data volumes, using the constructed probabilistic neural network.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 10/231,902Filed 29 Aug 2002 · us provisional application
Priority: 31 Aug 2001
Published: US 2003/0046006 A16 Mar 2003
Granted: 9 Dec 2003
Term ends: Not estimatedThe source records don’t support an estimate.

Classification3 codes

G01V 1/32
Processing seismic data, e.g. for interpretation or for event detection: transforming one recording into another or one representation into another
G01V 1/34
Processing seismic data, e.g. for interpretation or for event detection: displaying seismic recordings or visualisation of seismic data or attributes
G01V
Geophysics