Unlock instant, AI-driven research and patent intelligence for your innovation.

A Method to Get Gradient Parameters Based on Post-stack Parameters

A gradient parameter and parameter technology, applied in seismic signal processing and other directions, can solve problems such as affecting calculation accuracy, reducing data quality, and low signal-to-noise ratio, and achieving the effect of improving calculation efficiency

Active Publication Date: 2019-03-12
CHINA PETROLEUM & CHEM CORP +1
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the gradient parameters are mainly calculated based on pre-stack data, and its calculation effect is affected by the quality of pre-stack data.
Due to the low signal-to-noise ratio of the pre-stack data itself, especially after the sub-azimuth processing, the data quality will be further reduced, so the calculation of anisotropic parameters using pre-stack data will affect the calculation accuracy, and extreme values ​​​​are prone to occur
In addition, at present, when using pre-stack data to calculate gradient parameters, it often needs to go through a complex data fitting process, which requires high computational complexity and long calculation time

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A Method to Get Gradient Parameters Based on Post-stack Parameters
  • A Method to Get Gradient Parameters Based on Post-stack Parameters
  • A Method to Get Gradient Parameters Based on Post-stack Parameters

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] figure 2 The anisotropy gradient of the medium is obtained based on post-stack parameters according to an embodiment of the present disclosure. In this embodiment, the method may include the following steps:

[0049] Step 201, determine post-stack equations based on multiple incident angles:

[0050]

[0051] Among them, K represents the sum of the AVO intercepts corresponding to each of the multiple incident angles, and F represents the sum of the squares of the sine values ​​of each of the multiple incident angles, Indicates the azimuth The corresponding post-stack reflectance.

[0052] Predetermined incidence angle range [θ 1 , θ 2 ], and establish a pre-stack equation as shown in formula (4) for each selected incidence angle, and then superpose the established pre-stack equations to obtain a post-stack equation. Correspondingly, in formula (9), It should be noted that the method described in this disclosure mainly involves the difference operation betw...

Embodiment 2

[0101] Figure 5 is a schematic block diagram of obtaining an anisotropy gradient of a medium based on post-stack parameters according to an embodiment of the present disclosure. The device includes a post-stack equation building component 501 and a post-stack equation solving component 502 .

[0102] The post-stack equation construction component 501 can determine the post-stack equation based on multiple incidence angles:

[0103]

[0104] Wherein, K represents the sum of the AVO intercepts corresponding to each of the multiple incident angles, and F represents the sum of the squares of the sine values ​​of each of the multiple incident angles, Indicates the azimuth The corresponding post-stack reflectance.

[0105] Determining the post-stack equation based on multiple incidence angles may include: optionally a predetermined range of incidence angles [θ 1 , θ 2 ] within the plurality of angles of incidence, and a prestack equation may be established for each of the...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to the field of physical geography and discloses a post-stack parameter-based method for obtaining gradient parameters. The method comprises the steps of determining a post-stack equation based on a plurality of incidence angles, wherein K represents the sum of AVOs corresponding to all the incidence angles, F represents the sum of the squares of the sinusoidal values of all the incidence angles and the above figure shown in the specification represents after-stack reflection coefficients corresponding to azimuthal angles; based on the after-stack reflection coefficients corresponding to the plurality of azimuthal angles, calculating to obtain w12 and w11-w22; and obtaining an anisotropic gradient parameter B1 based on the following equation. According to the invention, the gradient parameter can be calculated based on post-stack data. Therefore, the method is high in calculation accuracy and small in calculation amount.

Description

technical field [0001] The present disclosure relates to the field of geophysics, and more particularly, to a method for obtaining gradient parameters based on post-stack parameters. Background technique [0002] Gradient parameters play a very important role in geophysical exploration. For example, anisotropy parameters, which can be measured by isotropic gradient and anisotropic gradient, are important parameters for understanding the structure and structure of fractured media. At present, gradient parameters are mainly calculated based on pre-stack data, and the calculation effect is affected by the quality of pre-stack data. Due to the low signal-to-noise ratio of the pre-stack data itself, especially after sub-azimuth processing, the data quality will be further reduced, so the calculation of anisotropic parameters using pre-stack data will affect the calculation accuracy, and extreme values ​​are prone to appear. In addition, at present, when using pre-stack data to c...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/28
Inventor 张克非李呈呈林正良朱童胡华锋
Owner CHINA PETROLEUM & CHEM CORP