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Method and device for detecting singularity of seismic data spectrum

A seismic data and detection method technology, applied in the field of petroleum exploration, can solve problems such as difficult spectrum shape description

Inactive Publication Date: 2017-04-05
BGP OF CHINA NAT GASOLINEEUM CORP
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Problems solved by technology

[0006] The embodiment of the present invention provides a method and device for detecting the singularity of the seismic data spectrum, which is used to solve the problem that it is difficult to describe the shape of the spectrum in detail in the prior art

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  • Method and device for detecting singularity of seismic data spectrum
  • Method and device for detecting singularity of seismic data spectrum

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Embodiment Construction

[0048] In order to make the object, technical solution and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.

[0049] In the embodiment of the present invention, a method for detecting the singularity of the seismic data spectrum is provided, such as figure 2 As shown, the method includes:

[0050] Step 201, select the time window data around the target layer; preferably, the time window data can be selected above the target layer, the target layer section or below the target layer, all of which can reflect the quality of the data, the reservoir rock, etc. to a certain extent. properties and fluid-containing properties; in target processing or interpretive processing, it focuses on analyzing change...

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Abstract

The invention belongs to the petroleum exploration field and especially relates to an earthquake data frequency spectrum singularity detection method and apparatus. The method comprises: selecting time window data on the periphery of a target stratum; edging the time window data to obtain a frequency spectrum through Fourier transform; performing Hilbert transformation on the amplitude spectrum in the frequency spectrum to obtain a real part and an imaginary part; obtaining the metric of the magnitude frequency spectrum singular point in dependence on the real part and the imaginary part; determining and outputting the position of the singular point and the singularity metric in dependence on the metric of the singular point. According to the invention, the singularity of the frequency spectrum is obtained; the shape of the frequency spectrum in the reservoir segment is analyzed to obtain the singular point and position and provide a novel property, i.e., singularity for explanation personal, which not only can provide preference basis for surface consistency processing, denoising and deconvolution, etc, but also can measure data resolution ratios, especially the shape of the frequency spectrum and reservoir segment oil-gas possibility correlation.

Description

technical field [0001] The invention belongs to the field of petroleum exploration, in particular to a singularity detection method and device for seismic data frequency spectrum. Background technique [0002] In the field of petroleum exploration, it can be known from the theory of seismic wave propagation that when the fluid properties of the reservoir change, the change of wave velocity will cause the change of the arrival time of the seismic wave, and the phenomenon of event pull-down will appear. This phenomenon can be used for oil and gas detection and identify. However, practice has proved that using the kinematic characteristics of seismic waves for oil and gas detection has strong multiple solutions; in wave theory, seismic wave fields can be described by dynamic parameters such as amplitude, frequency, phase, and attenuation. When the wave field propagates in the reservoir containing oil and gas, it will inevitably cause changes in the dynamic characteristics, and...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/28G01V1/30
Inventor 蔡希玲李虹刘玉莲
Owner BGP OF CHINA NAT GASOLINEEUM CORP
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