Seismic data time frequency analysis method based on synchronization extraction S transformation

A technology of seismic data and synchronous extraction, applied in the field of seismic exploration, can solve problems such as difficulty in interpretation work, and achieve the effect of being beneficial to interpretation

Inactive Publication Date: 2018-01-26
XI AN JIAOTONG UNIV +1
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Problems solved by technology

When the signal to be analyzed contains random noise, the wavelet coefficients generated by the noise will spread on the entire time-frequency plane. In this case, the synchronous squeezing operation is performed, and the coefficients generated by the noise may be squeezed to a certain frequency. components, which brings difficulties to the next step of interpretation

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  • Seismic data time frequency analysis method based on synchronization extraction S transformation
  • Seismic data time frequency analysis method based on synchronization extraction S transformation
  • Seismic data time frequency analysis method based on synchronization extraction S transformation

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Embodiment Construction

[0052] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. The embodiments described herein are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0053] The time-frequency analysis method of seismic signals based on the synchronous extraction of S-transform, the synchronous extraction of S-transform specifically includes the following steps:

[0054] Step 1: S-transform the signal

[0055] Signal x(τ)∈L 2 The time domain and frequency domain expressions of the S transform of (R) are respectively

[0056]

[0057] Where t and f represent the time position and frequency of the S-transform, respectiv...

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Abstract

The invention discloses a seismic data time frequency analysis method based on synchronization extraction S transformation. On the basis of S transformation, a synchronization extraction operator is introduced, coefficients of the S transformation result in tightest correlation with signal time-variant characteristics are extracted through the operator, so energy diffusion is compacted. The methodis advantaged in that the analysis result having the higher time frequency resolution can be acquired, the analysis result having the higher time frequency resolution is further applied to time frequency analysis of actual seismic data, not only can the position of underground reservoirs be accurately defined, the river and fault geological information can be more accurately described, but also further seismic data interpretation and well location determination are facilitated.

Description

【Technical field】 [0001] The invention belongs to the technical field of seismic exploration, and relates to a method for time-frequency analysis of seismic data based on synchronously extracted S-transform. 【Background technique】 [0002] Seismic signals are typical non-stationary signals, because the traditional Fourier transform can only describe the frequency components contained in the signal from the overall length, and cannot reflect the relationship between the frequency of the signal and the time-varying relationship. Time-frequency analysis technology maps the one-dimensional signal to the two-dimensional time-frequency plane, and uses the different characteristics of geological bodies of different scales at different frequencies to understand geological bodies, which can provide useful information for the processing and interpretation of seismic data, especially Especially in complex subtle oil and gas exploration, the time-frequency representation with high time-...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/32
Inventor 高静怀王前陈树民
Owner XI AN JIAOTONG UNIV
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