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A method and system for constructing a space-varying wavelet body

A construction method and wavelet technology, applied in the field of petroleum exploration, can solve problems such as high correlation, low precision of seismic inversion results, insufficient consideration of spatial development of geological anomalies, etc., and achieve the effect of improving accuracy

Active Publication Date: 2021-10-22
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

The existing space-variant wavelet extraction methods are basically based on spatial interpolation to obtain the space-variant wavelet body, but the limitation of this method is that the local correlation of synthetic record calibration in wells is high, and the spatial development of geological anomalies Insufficient consideration, based on the space-varying wavelet obtained by this method, the accuracy of the final seismic inversion result is low

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  • A method and system for constructing a space-varying wavelet body
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  • A method and system for constructing a space-varying wavelet body

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[0054] The implementation of the present invention will be described in detail below in conjunction with the accompanying drawings and examples, so as to fully understand and implement the implementation process of how to apply technical means to solve technical problems and achieve corresponding technical effects in the present invention. The embodiments of the present application and the various features in the embodiments can be combined with each other under the premise of no conflict, and the formed technical solutions are all within the protection scope of the present invention.

[0055] For reservoirs with strong lateral heterogeneity, it is common practice to extract space-variant wavelets to obtain higher correlations when calibrating synthetic records. However, the existing space-variant wavelet extraction methods are basically based on spatial interpolation to obtain the space-variant wavelet body, but the limitation of this method lies in the high correlation in the...

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Abstract

The invention discloses a method and system for constructing a space-varying wavelet body. The method includes acquiring seismic wavelets at each logging point in a target work area, including the first seismic wavelet at a logging point located where a geological anomaly body develops. wavelet, the second seismic wavelet located at the logging point where no geological anomaly body develops; based on the first and second seismic wavelets, the corresponding first space-varying wavelet body and the second space-varying wavelet body are respectively obtained; Obtain the root mean square amplitude attribute map reflecting the planar distribution of geological anomalies in the target work area and adjust the amplitude values ​​to obtain the first attribute constraint correction parameters corresponding to the first seismic wavelet and the first attribute constraint correction parameters corresponding to the second seismic wavelet. Two attribute constraint correction parameters; calculate based on the first and second space-varying wavelet bodies and the first and second attribute constraint correction parameters, and construct a space-varying wavelet body based on attribute constraints.

Description

technical field [0001] The invention belongs to the field of petroleum exploration, in particular to a method and system for constructing a space-varying wavelet body. Background technique [0002] At present, in petroleum exploration and development, seismic inversion is the main method and means for reservoir lateral prediction. The inversion method used in seismic inversion is usually to calibrate the synthetic records of well logging data and side-hole seismic data to obtain seismic wavelets, and then deconvolute seismic data and seismic wavelets to obtain reflection coefficients, and then obtain wavelets. Impedance data. This inversion method is more suitable for reservoirs with relatively stable lateral development of geological bodies, but for reservoirs with strong lateral heterogeneity, such as carbonate reservoirs, even if more logs are set in the work area , it is difficult to obtain a stable seismic wavelet in the whole region by using this inversion method. ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/48
CPCG01V1/48
Inventor 张克非李呈呈林正良胡华锋
Owner CHINA PETROLEUM & CHEM CORP
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