Method and device for obtaining body curvature

A technology of curvature and equipment, applied in the field of geophysical exploration, can solve problems such as poor effect and slow calculation speed, and achieve the effect of strong anti-noise ability and high calculation performance

Active Publication Date: 2017-01-18
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The complex trace analysis algorithm only uses the dip angle information of a single point and does not smooth out the background noise, so the effect is poor; while the discrete dip angle scanning algorithm has a good effect, but the calculation speed is too slow

Method used

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  • Method and device for obtaining body curvature
  • Method and device for obtaining body curvature
  • Method and device for obtaining body curvature

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Embodiment Construction

[0034] Example embodiments shown in detail are disclosed herein. However, specific structural and functional details disclosed herein are merely representative for purposes of describing example embodiments. This invention may, however, be embodied in many modifications and should not be construed as limited to only the example embodiments set forth herein.

[0035] figure 1 A flowchart of a method of obtaining volumetric curvature is shown.

[0036] refer to figure 1 , in step S101, the gradient vectors in the line direction, trace direction and time / depth direction of each seismic data sampling point of the 3D seismic data are acquired.

[0037] The three-dimensional seismic data is post-stack seismic data. For example, the field exploration acquisition is carried out by methods known in the art, and the original acquisition data can be obtained, and then, after seismic data processing (including spherical divergence correction, formation absorption Q Compensation, ampli...

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Abstract

The invention provides a method and equipment for obtaining body curvature, wherein the method comprises the following steps of acquiring the gradient vectors of the linear direction, the path direction and the time / depth direction of each earthquake data sampling point of three-dimentional earthquake data; establishing the gradient structure tensor of each earthquake data sampling point based on the acquired gradient vectors; smoothing the elements of the gradient structure tensors; acquiring a P wave attribute and a Q wave attribute based on the smoothed gradient structure tensors, wherein the P wave attribute is an attribute showing the change rate of an underground rock layer along the linear direction, and the Q wave attribute is an attribute showing the change rate of the underground rock layer along the path direction; obtaining the body curvature based on the P wave attribute and the Q wave attribute. By the method, better calculating performance and more accurate prediction on cracks can be obtained.

Description

technical field [0001] The present invention relates to geophysical prospecting technology, and more specifically, relates to a method and equipment for obtaining body curvature based on P-wave and Q-wave attributes, and ultimately predicting fracture development. Background technique [0002] According to statistics, more than half of the global oil and gas production is distributed in fractured reservoirs. In my country, fractured reservoirs are also widely developed, such as Sichuan, North China, Changqing, Tarim, Karamay, Shengli, Jilin, Liaohe, Qinghai, Yumen and many other oil fields have found fractured oil and gas fields. Fractured reservoirs are dominated by carbonates. However, due to the unique low porosity, heterogeneity and anisotropy of carbonate reservoirs, the difficulty of oil and gas exploration is greatly increased. Fractures are the main pathways for oil and gas accumulation and migration in such reservoirs. Therefore, accurately predicting fractures in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/28
Inventor 张洞君邹文陶正喜钱枫刘璞洪余刚周晶晶张越
Owner BC P INC CHINA NAT PETROLEUM CORP
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