Method and device for the generation and application of anisotropic elastic parameters
First Claim
1. A method for anisotropic processing of earth elastic parameter data and application of the processed data, comprising the steps of:
- obtaining earth elastic parameter data of an object of interest;
obtaining earth anisotropy parameter data of the object of interest;
transforming the earth elastic parameter data based on input earth anisotropy parameter data to obtain anisotropic elastic parameter data; and
applying the anisotropic elastic parameter data in at least one method selected from the group consisting of i) an isotropic seismic modeling method, ii) an isotropic seismic analysis and interpretation method, iii) an isotropic seismic wavelet estimation method, iv) an isotropic seismic inversion method, and v) an isotropic method for analysis and interpretation of inversion results to produce processed anisotropic elastic parameter data.
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Abstract
A method is disclosed for the generation and application of anisotropic elastic parameters. Anisotropic elastic parameters are generated such that, for selected seismic wave and anisotropy types, an approximation to the anisotropic modeling of seismic amplitudes is obtained by the equivalent isotropic modeling with the anisotropic elastic parameters. In seismic modeling, wavelet estimation, seismic interpretation, inversion and the interpretation and analysis of inversion results anisotropy are handled with isotropic methods, when earth elastic parameters utilized in these methods are replaced by the anisotropic elastic parameters.
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Citations
45 Claims
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1. A method for anisotropic processing of earth elastic parameter data and application of the processed data, comprising the steps of:
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obtaining earth elastic parameter data of an object of interest;
obtaining earth anisotropy parameter data of the object of interest;
transforming the earth elastic parameter data based on input earth anisotropy parameter data to obtain anisotropic elastic parameter data; and
applying the anisotropic elastic parameter data in at least one method selected from the group consisting of i) an isotropic seismic modeling method, ii) an isotropic seismic analysis and interpretation method, iii) an isotropic seismic wavelet estimation method, iv) an isotropic seismic inversion method, and v) an isotropic method for analysis and interpretation of inversion results to produce processed anisotropic elastic parameter data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 40, 43)
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19. A method for approximating anisotropic seismic modeling by applying isotropic seismic modeling, comprising steps of:
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obtaining earth elastic parameter data of an object of interest;
obtaining earth anisotropy parameter data of the object of interest;
transforming the earth elastic parameter data to obtain anisotropic elastic parameter data based on the earth anisotropy parameter data; and
applying isotropic seismic modeling on the transformed anisotropic elastic parameter data to produce anisotropic seismic data, the produced anisotropic seismic data being an approximation of seismic data obtained by anisotropic seismic molding. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 41, 44)
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33. An iterative method for deriving transform functions to generate anisotropic elastic parameter data, comprising the steps of:
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(a) obtaining earth elastic parameter data of an object of interest;
(b) obtaining earth anisotropy parameter data of the object of interest;
(c) generating synthetic anisotropic seismic amplitude reference data using an anisotropic forward modeling method, wherein the modeling method is selected by criteria including type(s) of anisotropy, wave type(s), model complexity and/or modeling accuracy;
(d) generating anisotropic elastic parameter data by applying transforms using an initial set of transform parameters;
(e) applying isotropic forward modeling with the anisotropic elastic parameter data using an isotropic equivalent of the anisotropic forward modeling method used in step (c);
(f) comparing the anisotropic seismic amplitude data synthesized with the isotropic modeling of step (e) with the reference anisotropic seismic amplitude data of step (c);
(g) repeating steps (e) and (f) with at least one modified transform parameter until a satisfactory match is obtained; and
(h) producing the transform functions from the modified transform parameter of step (g). - View Dependent Claims (34, 35, 36, 37, 42, 45)
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38. A device for anisotropic processing of earth elastic parameter data and application of processed data, comprising:
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a first input means for inputting earth elastic parameter data of an object of interest;
a second input means for inputting earth anisotropy parameter data of the object of interest;
a transform means for transforming, based on the input earth anisotropy parameter data, the input earth elastic parameter data to obtain anisotropic elastic parameter data;
a processor for applying the anisotropic elastic parameter data in at least one method selected from the group consisting of i) an isotropic seismic modeling method, ii) an isotropic seismic analysis and interpretation method, iii) an isotropic seismic wavelet estimation method, iv) an isotropic seismic inversion method and v) an isotropic method for the analysis and interpretation of inversion results; and
an output means for outputting the processed anisotropic elastic parameter data.
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39. A device for approximating anisotropic seismic modeling by applying isotropic seismic modeling, comprising:
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a first input means for inputting earth elastic parameter data of an object of interest;
a second input means for inputting earth anisotropy parameter data of the object of interest;
a transform means for transforming, based on the input earth anisotropy parameter data, the input earth elastic parameter data to obtain anisotropic elastic parameter data;
a processor for applying the isotropic seismic modeling on the transformed anisotropic elastic parameter data, the resulting modeled anisotropic seismic data being an approximation of the data obtained by a corresponding anisotropic seismic modeling; and
an output means for outputting the processed anisotropic seismic data.
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Specification