Sand reservoir prediction method and device based on seismic attributes

A seismic attribute and reservoir prediction technology, applied in the field of geophysical exploration, can solve problems such as unstable attribute prediction results, and achieve the effects of ensuring rationality, improving stability, and improving accuracy

Active Publication Date: 2019-10-29
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for predicting sand body reservoirs based on seismic attributes, to solve the problem of unstable property prediction results caused by scanning channels with fixed time windows in the current sand body reservoir prediction process; the present invention also provides A device for predicting sand reservoirs based on seismic attributes

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  • Sand reservoir prediction method and device based on seismic attributes
  • Sand reservoir prediction method and device based on seismic attributes
  • Sand reservoir prediction method and device based on seismic attributes

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Embodiment Construction

[0063] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0064] The superposition of seismic wavelets where the top-bottom reflection interface does not completely coincide, there is a wavelet time window interval that does not interfere with each other or has little interference. The change of seismic attribute data in the wavelet time window interval on the plane can reflect the thickness less than Three-dimensional seismic vertical resolution corresponds to the shape and boundary of the geological body on the plane. Therefore, based on the above principles, the present invention proposes a method for predicting sand body reservoirs based on seismic attributes. The method first determines the time window interval of the target sand body and as the initial time window; then use the top and bottom time window division method to divide the initial time window to obtain at least two top sub-time wind...

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Abstract

The invention relates to a sand reservoir prediction method and device based on seismic attributes, and belongs to the technical field of geophysical exploration. The method comprises extracting the seismic attributes of respective wavelet time window sections of the top and the bottom of a target sand body through a three-dimensional seismic top and bottom time window dividing method; selecting the seismic attributes with the highest degree of conformity with a drilled sand body based on the top and bottom; separately drawing the sedimentary facies corresponding to the top and bottom seismicattribute maps; comparing the changes of the top and bottom sedimentary facies to achieve the prediction of the sand reservoir. The time window division method of the invention can effectively removethe interference information, and can further analyze the sand change according to the seismic attributes extracted by the divided time windows, thereby improving the accuracy of identifying the sandreservoir.

Description

technical field [0001] The invention relates to a sandbody reservoir prediction method and device based on seismic attributes, belonging to the technical field of geophysical exploration. Background technique [0002] There are many existing 3D seismic reservoir prediction technologies. The method based on geophysical theory is to use the well point acoustic wave time difference curve to synthesize seismic records, reconstruct the sensitivity curve to fit the acoustic wave curve to synthesize seismic records to constrain the seismic data, or constrain the seismic data with geological models, etc. Seismic data, inversion of acoustic impedance body or profile; however, it is difficult to establish an effective geological model for model inversion; it is difficult to determine boundary conditions such as constrained sand body direction in random inversion, and well-controlled acoustic impedance inversion is limited by seismic resolution and cannot effectively reflect A single s...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/30
CPCG01V1/307G01V2210/63
Inventor 陈勇朱彦群胡明卫吕军吕久富吴泽波凡俊王红丽
Owner CHINA PETROLEUM & CHEM CORP
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