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A method and device for predicting sand body reservoirs 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 effect of improving accuracy and removing interference information.

Active Publication Date: 2021-04-30
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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  • A method and device for predicting sand body reservoirs based on seismic attributes
  • A method and device for predicting sand body reservoirs based on seismic attributes
  • A method and device for predicting sand body reservoirs 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 sandbody reservoir prediction method and device based on seismic attributes, belonging to the technical field of geophysical exploration. The present invention extracts the seismic attributes of the time window intervals of the top and bottom subwaves of the target sand body through the division method of the three-dimensional seismic top and bottom time windows, selects the seismic attributes with the highest degree of conformity with the drilled sand body by dividing the top and bottom, and draws the top and bottom respectively. The sedimentary facies corresponding to the bottom seismic attribute map, and the changes of the top and bottom sedimentary facies are compared to realize the prediction of sand body reservoirs. The time window division method of the present invention can effectively remove interference information, further analyze sand body changes according to the seismic attributes extracted by the divided time windows, and improve the accuracy of identifying sand body reservoirs.

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 Patents(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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