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Method and device for calculating discontinuity attribute value of stratum

A continuous and attribute value technology, applied in the field of petroleum seismic exploration data processing, can solve the problems of slow speed, inability to clearly reflect faults and lithology changes, and high computational complexity

Inactive Publication Date: 2014-12-03
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology

However, the methods currently used in fracture prediction have problems such as high computational complexity, slow speed, poor anti-noise performance, and inability to clearly reflect faults and lithological changes.

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  • Method and device for calculating discontinuity attribute value of stratum
  • Method and device for calculating discontinuity attribute value of stratum
  • Method and device for calculating discontinuity attribute value of stratum

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Embodiment Construction

[0050] Exemplary embodiments of the present invention will now be described in detail, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like parts. The embodiments are described below in order to explain the present invention by referring to the figures.

[0051] figure 1 is a flow chart illustrating a method of calculating formation discontinuity attribute values ​​according to an exemplary embodiment of the present invention.

[0052] like figure 1 As shown, in step 101, the seismic data corresponding to each point in the three-dimensional seismic data volume is read. Figure 9 A spatial model of a three-dimensional seismic data volume is shown. In 3D seismic exploration, the spatial model of the obtained 3D seismic data volume is as follows: Figure 9 as shown, Figure 9 The black dots in represent seismic data, which can be expressed as D(x,y,z). Here x represents the line number, y represents the track number, ...

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Abstract

The invention provides a method and device for calculating the discontinuity attribute values of a stratum. The method includes the steps that seismic data corresponding to points in a three-dimensional seismic data body are read; according to the read seismic data, a gradient body structure tensor square matrix is acquired; data of the position corresponding to the position of one point in the three-dimensional seismic data body are extracted from each element of the gradient body structure tensor square matrix, the extracted data are ranked according to the positions of the corresponding elements in the gradient body structure tensor square matrix, and then a structure tensor square matrix of one point is formed; the feature value of the structure tensor square matrix of one point is calculated; based on the feature value, the discontinuity attribute value of one point is calculated. By the adoption of the method, the discontinuity attribute value of the stratum is calculated quickly and accurately, and then the change of a fault and lithology can be clearly reflected.

Description

technical field [0001] The invention belongs to the field of petroleum seismic exploration data processing, and more specifically relates to a method and device for calculating stratum discontinuity attribute values. Background technique [0002] According to statistics, more than half of the global oil and gas production is distributed in fractured reservoirs. In my country, such fractured reservoirs are also widely developed, such as Sichuan, North China, Changqing, Tarim, Karamay, Shengli, Jilin, Liaohe, Qinghai, Yumen and many other places have found fractured oil and gas fields. Therefore, accurately predicting the development of fractures as oil and gas channels is of great significance for understanding the true state of underground geological reservoirs, reducing exploration risks, and improving the success rate of drilling. Formation discontinuity attributes can reflect changes in faults and lithology, and are widely used in fracture prediction. However, the metho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/30G06F19/00
Inventor 张洞君邹文谭荣彪陈浩凡赵尧唐泽凯周晶晶范晓赵振伟
Owner BC P INC CHINA NAT PETROLEUM CORP
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