Detection method of fracture-vug development zone based on iterative three-parameter wavelet transform

A technology of wavelet transform and detection method, which is applied in the field of oil and gas geophysical exploration and detection, can solve the problems of poor matching of seismic data, etc., achieve the effects of improving accuracy, improving the ability to suppress noise, and overcoming poor matching

Active Publication Date: 2016-08-17
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology

The present invention uses three-parameter wavelet transform instead of conventional wavelet transform for calculation, overcomes the defect of poor matching of seismic data in the prior art, and improves the accuracy of edge detection

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  • Detection method of fracture-vug development zone based on iterative three-parameter wavelet transform
  • Detection method of fracture-vug development zone based on iterative three-parameter wavelet transform
  • Detection method of fracture-vug development zone based on iterative three-parameter wavelet transform

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Embodiment Construction

[0049] The present invention is to provide a method for detecting fracture-vug development zones based on iterative three-parameter wavelet transform, which processes two-dimensional seismic slices for identification of fracture-vug development zones and effectively guides reservoir prediction for oil and gas geophysical exploration .

[0050] The present invention can achieve following purpose:

[0051] (1) Using three-parameter wavelet transform instead of conventional wavelet transform for calculation, to overcome the defect of poor matching of seismic data in the prior art;

[0052] (2) Carry out edge detection processing to the horizontal and vertical of 2-dimensional seismic slice simultaneously, adopt the root mean square of the result of horizontal and vertical edge detection as final edge detection result, improve the precision of the edge detection of prior art;

[0053] (3) Further improve the precision of the edge detection of prior art, adopt iterative process, p...

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Abstract

The invention discloses a method for detecting fracture-vug development zones based on iterative three-parameter wavelet transform, which includes: using three-parameter wavelet transform instead of conventional wavelet transform for calculation, performing edge detection processing on the horizontal and vertical sides of 2-dimensional seismic slices at the same time, The root mean square of the horizontal and vertical edge detection results is used as the final edge detection result, and then the wavelet transformation is performed twice, and the edge-preserving and denoising processing is performed on the wavelet transformation result array to obtain the final edge detection result. array, use the resulting array to describe the fracture-vuggy body development zone. The invention adopts the three-parameter wavelet transform instead of the conventional wavelet transform for calculation, overcomes the defect of poor matching of seismic data in the prior art, and improves the precision of edge detection.

Description

technical field [0001] The invention relates to a detection method for oil and gas geophysical exploration, in particular to a detection method for fracture-vug development zones based on iterative three-parameter wavelet transform. Background technique [0002] In the field of oil and gas geophysical exploration, edge detection methods are mainly used to find fracture-cave development zones, which are often favorable oil and gas storage spaces or migration channels. [0003] Pores, cracks (cracks) and dissolved pores are ubiquitous in rocks or rock formations in nature, and their shapes and scales are also very different. For seismic exploration, due to the limitation of resolution, it is impossible to identify individual pores, holes, and fractures, and only fracture development zones with a certain scale can be identified. In fact, individual pores, caves, and fractures play little role in the accumulation of oil and gas, and the real exploration and development value is...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/28G01V1/30
Inventor 徐明华刘俊海欧阳诚吴大奎陈琴
Owner BC P INC CHINA NAT PETROLEUM CORP
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