Data quality analysis-based signal to noise ratio controllable earthquake frequency-expansion processing method

A quality analysis and processing method technology, applied in the direction of seismic signal processing, etc., can solve the problems of large personal subjective randomness, unconvincing amplitude and fidelity of frequency extension results, and reduced signal-to-noise ratio

Active Publication Date: 2017-02-15
英得赛斯科技(北京)有限公司
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Problems solved by technology

Time-frequency analysis frequency extension technology starts from the perspective of signal processing, adapts to the non-stationary characteristics of seismic signals, and does not require ideal assumptions. Both low-frequency components and high-frequency components can be expanded, with high flexibility, but the spectral re

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  • Data quality analysis-based signal to noise ratio controllable earthquake frequency-expansion processing method
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[0036] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0037] The application principle of the present invention will be further described below in conjunction with the accompanying drawings.

[0038] Such as figure 1 Shown: The seismic frequency extension processing method with controllable signal-to-noise ratio based on data quality analysis provided by the embodiment of the present invention includes the following steps:

[0039] S101: Using the generalized S-transform time-frequency analysis method to perform time-frequency decomposition on the seismic data to obtain a series of seismic time-frequency components of different frequencies; decompose the non-stationary time-d...

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Abstract

The invention discloses a data quality analysis-based signal to noise ratio controllable earthquake frequency-expansion processing method. A generalized S transformation time frequency analysis method is adopted for subjecting earthquake data to time frequency decomposition; amplitude preservation of each time frequency component is analyzed and evaluated via well-to-seismic integration, correction factors are calculated via amplitude preservation difference of different time frequency components, the correction factors of each time frequency component are smoothed in time and space scopes, the smoothed correction factors of each time frequency component are used for correcting a corresponding time frequency component, frequency energy can be compensated, signal to noise ratio constraint conditions are specified, and earthquake data is reconstructed under the specified signal to noise ratio constraint conditions. Via the data quality analysis-based signal to noise ratio controllable earthquake frequency-expansion processing method, amplitude preservation of an original earthquake cannot be lowered via frequency expansion operation, and an earthquake frequency band can be widened to a maximum degree under the specified signal to noise ratio conditions.

Description

technical field [0001] The invention belongs to the field of petroleum and natural gas exploration and development, and in particular relates to a seismic frequency extension processing method with controllable signal-to-noise ratio based on data quality analysis. Background technique [0002] Seismic frequency extension technology is to broaden the seismic effective frequency band by performing mathematical operations on seismic data, and restore the reflected energy of the low frequency band and high frequency band of the earthquake. At present, the commonly used seismic frequency extension processing techniques include frequency extension technology based on deconvolution, frequency extension technology based on absorption attenuation compensation and inverse Q filter frequency extension technology, and frequency extension technology based on time-frequency analysis and time-spectrum compensation. The deconvolution technique improves the seismic bandwidth by compressing t...

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Application Information

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IPC IPC(8): G01V1/30
CPCG01V1/30
Inventor 林桂康王辉李城堡赵裕辉王秀闽
Owner 英得赛斯科技(北京)有限公司
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