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Rotation diamond based attribute extraction and fault description method

An attribute extraction and rhombus technology, which is applied in the field of attribute extraction and fault description based on rotating rhombus, can solve the problem of not being able to describe the direction characteristics of abnormal bodies well

Active Publication Date: 2015-03-04
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology

In this way, the directional characteristics of the abnormal body cannot be well described.

Method used

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  • Rotation diamond based attribute extraction and fault description method
  • Rotation diamond based attribute extraction and fault description method
  • Rotation diamond based attribute extraction and fault description method

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Embodiment Construction

[0031] combine figure 1 and figure 2 , a method for attribute extraction and fault description based on a rotating rhombus, including the following steps:

[0032] a. Use the diamond to determine the range of the data, press figure 1 As shown, let the length values ​​of the long and short semi-axes of the rhombus be a and b respectively, and the angle between the long axis and the horizontal axis be θ, use the following formula to determine the length values ​​of the four sides of the rhombus, and set them as y 1 、y 2 、y 3 、y 4 , where y 1 is the length value of AB, y 2 is the length value of BC, y 3 is the length value of CD, y 4 is the length value of DA, use its intersection to determine the data within the specific panel range: that is, during the counterclockwise rotation of the rhombus around the origin, when point A is greater than or equal to the abscissa of point D, choose to satisfy the value less than or equal to y 1 and y 2 and greater than or equal to y...

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Abstract

The invention discloses a rotation diamond based attribute extraction and fault description method, which comprises the following steps of: a, determining a surface element range; b, inputting seismic data, giving size values of a long shaft and a short shaft of a diamond, selecting a point (sampling point) in data, rotating at 360 degrees, and extracting data in the surface element range during rotation at each angle; c, selecting an attribute metric and calculating an attribute value of the attribute metric in allusion to extracted data; d, taking maximum value or minimum value to serve as the attribute value of the point after calculating the attribute values of all angles of the point; e, continuously selecting other points in the data, and repeating the steps b, c and d until all points are selected; and f, displaying the minimum attribute value by using a slice in allusion to edgewise data of a fracture system, displaying the rotation attribute values of different angles by using a rose diagram in allusion to well points, and displaying a final result by using a histogram in allusion to a fault broken belt. The rotation diamond based attribute extraction and fault description method has good noise immunity and resolution rate, can be used for identifying fault and crack directions, and also can be used for quantitatively judging the fault broken belt.

Description

technical field [0001] The invention belongs to the field of seismic exploration. Seismic exploration includes three technologies: acquisition, processing, and interpretation. Seismic attributes are a very important technical means for seismic interpretation. Currently, there are many methods for extracting seismic attributes, but all of them have limitations in calculation methods. In particular, the present invention relates to a method for extracting attributes and describing faults based on a rhombus of rotation, and focuses on the application in interpretation of faults and fractures. Background technique [0002] There are many ways to extract seismic attributes: whole-trace extraction can study the profile characteristics of attributes; slice attributes are often obtained when extracting along the time window; coherent attributes can also be extracted by simple spatial combinations such as right angles and cross arrangements, all of the above are The main work of dai...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/28
Inventor 张军华刘显太金强王军李军武刚王伟韩双张明张录录
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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