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Azimuth seismic wavelet converging method

A technology of seismic wavelet and fusion method, which is applied in the direction of seismic signal processing, etc., and can solve the problem of no seismic wavelet fusion seismic wavelet, etc.

Active Publication Date: 2014-11-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, there is currently no related technology for seismic wavelet fusion or azimuthal seismic wavelet fusion

Method used

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  • Azimuth seismic wavelet converging method
  • Azimuth seismic wavelet converging method
  • Azimuth seismic wavelet converging method

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Embodiment Construction

[0038] Below in conjunction with accompanying drawing, the present invention is described in further detail:

[0039] The method involved in the present invention is applicable to the exploration and development of conventional oil and gas based on lithological traps and the exploration and development of unconventional (coal bed methane and shale gas) oil and gas. The key points of the method of the present invention include combining different azimuth CMP The subwaves extracted from the gather data are fused into a subwave using certain technical means. This wavelet will contain key information (frequency, phase) of each azimuth wavelet. The use of this type of wavelet for seismic pre-stack inversion or seismic post-stack inversion will help to further reflect reservoir characteristics and serve the exploration and development of conventional oil and gas and coalbed methane.

[0040] Such as figure 1 As shown, the fusion method of the azimuth seismic wavelet of the present...

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Abstract

The invention provides an azimuth seismic wavelet converging method, and belongs to the field of seismic prospecting and development of oil gas and coalbed gas. The method comprises the following steps: (1), pretreatment is carried out on azimuth wavelets, and at least two different azimuth wavelets are extracted from the same seismic data or CMP pre-stack data; (2) the main frequency and the main frequency phase of each azimuth wavelet are extracted; and (3) the main frequency and the main frequency phase of each azimuth wavelet obtained in the second step are used for generating a new wavelet. By using the method of the invention, one seismic wavelet can contain characteristics of multiple seismic wavelets.

Description

technical field [0001] The invention belongs to the field of seismic exploration and development of oil and gas and coalbed methane, and in particular relates to a fusion method of azimuth seismic wavelets. Background technique [0002] Seismic wavelet (hereinafter referred to as wavelet) is a component of the convolution model of seismic records, usually referring to seismic pulses composed of 2 to 3 or more phases. A wavelet can be defined by its amplitude spectrum and phase spectrum, and the type of phase spectrum can be zero phase, constant phase, minimum phase, mixed phase, etc. For zero phase and constant phase wavelets, it can be simply viewed as The operation is a collection of sine waves with different amplitudes and frequencies, and all sine waves are of zero phase or constant phase (such as 90°); in the frequency domain, the problem of wavelet extraction consists of two parts: determining the amplitude spectrum and Phase Spectrum, Determining the phase spectrum i...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/28
Inventor 宋志翔刘百红杨强白俊雨岳承琪魏嘉仇正兰苏凌毕进娜
Owner CHINA PETROLEUM & CHEM CORP