Processing of seismic data using the S-transform
First Claim
1. A method for processing seismic data comprising:
- a processor in communication with the input port for sensing seismic data;
a) receiving the seismic data, the seismic data being indicative of at least a time-dependent seismic trace;
b) determining second seismic data by transforming the seismic data into time-frequency domain using a time-frequency transform;
c) processing the second seismic data for determining at predetermined time instances an instantaneous amplitude and a dominant instantaneous frequency;
d) determining at the predetermined time instances third seismic data indicative of a likelihood of a presence of hydrocarbons based on a quotient of the instantaneous amplitude to the dominant instantaneous frequency; and
,e) providing the third seismic data.
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Accused Products
Abstract
The present invention relates to a method and system for processing seismic data. Seismic data indicative of at least a time-dependent seismic trace are transformed into time-frequency domain using the S-transform. The transformed seismic data are processed for determining at predetermined time instances an instantaneous amplitude and a dominant instantaneous frequency. Based on a quotient of the instantaneous amplitude to the dominant instantaneous frequency seismic data indicative of a likelihood of a presence of hydrocarbons are then determined which are then graphically displayed. The method and system for processing seismic data provides a powerful tool for determining the likelihood of a presence of hydrocarbons based on a double peak hydrocarbon signature in the quotient of the instantaneous amplitude to the dominant instantaneous frequency.
7 Citations
26 Claims
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1. A method for processing seismic data comprising:
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a processor in communication with the input port for sensing seismic data; a) receiving the seismic data, the seismic data being indicative of at least a time-dependent seismic trace; b) determining second seismic data by transforming the seismic data into time-frequency domain using a time-frequency transform; c) processing the second seismic data for determining at predetermined time instances an instantaneous amplitude and a dominant instantaneous frequency; d) determining at the predetermined time instances third seismic data indicative of a likelihood of a presence of hydrocarbons based on a quotient of the instantaneous amplitude to the dominant instantaneous frequency; and
,e) providing the third seismic data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method for processing seismic data comprising:
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a processor in communication with the input port for sensing seismic data; receiving the seismic data, the seismic data being indicative of a plurality of time-dependent seismic traces of one of a two-dimensional migrated section and a three-dimensional migrated section; determining second seismic data by transforming each of the plurality of seismic traces into time-frequency domain using a Stockwell transform; processing the second seismic data for averaging a modulus of the S-transform of seismic traces corresponding to at least a predetermined portion of the one of a two-dimensional migrated section and a three-dimensional migrated section; determining at each of a plurality of predetermined time instances a maximum amplitude of the averaged modulus of the Stockwell transform and associating the instantaneous amplitude therewith; determining at each of the plurality of predetermined time instances the dominant instantaneous frequency as the frequency where the maximum amplitude of the averaged modulus of the Stockwell transform occurs; determining at each of the plurality of predetermined time instances third seismic data indicative of a likelihood of a presence of hydrocarbons based on a quotient of the instantaneous amplitude to the dominant instantaneous frequency; and
,providing the third seismic data.
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16. A storage medium having stored therein executable commands for execution on a processor, the processor when executing the commands performing:
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a) receiving the seismic data, the seismic data being indicative of at least a time-dependent seismic trace; b) determining second seismic data by transforming the seismic data into time-frequency domain using a time-frequency transform; c) processing the second seismic data for determining at predetermined time instances an instantaneous amplitude and a dominant instantaneous frequency; d) determining at the predetermined time instances third seismic data indicative of a likelihood of a presence of hydrocarbons based on a quotient of the instantaneous amplitude to the dominant instantaneous frequency; and
,e) providing the third seismic data. - View Dependent Claims (17, 18, 19)
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20. A storage medium having stored therein executable commands for execution on a processor, the processor when executing the commands performing:
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receiving the seismic data, the seismic data being indicative of a plurality of time-dependent seismic traces of one of a two-dimensional migrated section and a three-dimensional migrated section; determining second seismic data by transforming each of the plurality of seismic traces into time-frequency domain using a Stockwell transform; processing the second seismic data for averaging a modulus of the Stockwell transform of seismic traces corresponding to at least a predetermined portion of the one of a two-dimensional migrated section and a three-dimensional migrated section; determining at each of a plurality of predetermined time instances a maximum amplitude of the averaged modulus of the Stockwell transform and associating the instantaneous amplitude therewith; determining at each of the plurality of predetermined time instances the dominant instantaneous frequency as the frequency where the maximum amplitude of the averaged modulus of the Stockwell transform occurs; determining at each of the plurality of predetermined time instances third seismic data indicative of a likelihood of a presence of hydrocarbons based on a quotient of the instantaneous amplitude to the dominant instantaneous frequency; and
,providing the third seismic data.
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21. A system for processing seismic data comprising:
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an input port for receiving the seismic data, the seismic data being indicative of at least a time-dependent seismic trace; a processor in communication with the input port for; a) determining second seismic data by transforming the seismic data into time-frequency domain using a time-frequency transform; b) processing the second seismic data for determining at predetermined time instances an instantaneous amplitude and a dominant instantaneous frequency; c) determining at the predetermined time instances third seismic data indicative of a likelihood of a presence of hydrocarbons based on a quotient of the instantaneous amplitude to the dominant instantaneous frequency; and
,a storage medium in communication with the processor having stored therein executable commands for execution on the processor, the processor when executing the commands performing at least a portion of a) to c); and
,an output port in communication with the processor for providing the third seismic data. - View Dependent Claims (22, 23, 24, 25)
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26. A system for processing seismic data comprising:
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an input port for receiving the seismic data, the seismic data being indicative of a plurality of time-dependent seismic traces of one of a two-dimensional migrated section and a three-dimensional migrated section; a processor in communication with the input port for; a) determining second seismic data by transforming each of the plurality of seismic traces into time-frequency domain using a stockwell-transform; b) processing the second seismic data for averaging a modulus of the S-transform of seismic traces corresponding to at least a predetermined portion of the one of a two-dimensional migrated section and a three-dimensional migrated section; c) determining at each of a plurality of predetermined time instances a maximum amplitude of the averaged modulus of the stockwell-transform and associating the instantaneous amplitude therewith; d) determining at each of the plurality of predetermined time instances the dominant instantaneous frequency as the frequency where the maximum amplitude of the averaged modulus of the stockwell-transform occurs; e) determining at each of the plurality of predetermined time instances third seismic data indicative of a likelihood of a presence of hydrocarbons based on a quotient of the instantaneous amplitude to the dominant instantaneous frequency; and
,a storage medium in communication with the processor having stored therein executable commands for execution on the processor, the processor when executing the commands performing at least a portion of a) to e); and
,an output port in communication with the processor for providing the third seismic data.
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Specification