敏感频率地震属性在薄层砂体预测中的应用——以松辽盆地肇源地区为例

doi:10.11720/wtyht.2020.1311

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Abstract

In this paper,the channel sand body of Fuyu oil reservoir in Y₅ well area of Zhaoyuan area in northern Songliao Basin was chosen as the research object.In view of the phenomena that the sand body thickness is thin,the lateral change is prominent,and the seismic response characteristics of the sand body of the same thickness are inconsistent,the authors adopted the time-frequency analysis technique based on the simulation analysis of the seismic response characteristics of the target sand body.The generalized S transform was used to optimize the sensitive frequency of different thicknesses and combined sand bodies in the frequency domain,and the data were reconstructed based on the sensitive frequency to eliminate the sand.The body and the seismic profile characteristics were inconsistent,and it was better to predict the sand body distribution by seismic attributes.The research results show that using the sensitive frequency to reconstruct the seismic attributes extracted by the data body can effectively improve the prediction accuracy of the thin-layer channel sand body and greatly reduce the risk of oilfield exploration and development.

Key words： channel sand body thin layer tuning time frequency analysis sensitive frequency reconstruction

Received: 10 June 2019 Published: 22 April 2020

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	Articles by authors
	Peng AN
	Zhi-Long YU
	Zhuan LIU
	Yun-Hai MA
	Li LI
	Feng-Xuan LIU

Cite this article:

Peng AN,Zhi-Long YU,Zhuan LIU, et al. The application of sensitive frequency seismic attributes to thin sand body prediction:Exemplified by Zhaoyuan area in Songliao Basin[J]. Geophysical and Geochemical Exploration, 2020, 44(2): 321-328.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2020.1311 OR https://www.wutanyuhuatan.com/EN/Y2020/V44/I2/321

Top strcture map of FII1 formation in Y5 well area

Analysis of drilling effect of FII1 small horizontal well
a—amplitde attribute;b—cross P₁ well-A well connected seismic section

Cross three known well seicmic profiles

Wedge model forword performance map
a—wedge geological model;b—wedge model forward profile;c—relation between amplitude and thickness

Comparison of seismic spectrum profiles by different spectral decomposition algorithms
a—original seismic profile;b—STFT;c—SWT;d—GST

Three well-known wells based on generalized S-transformation time-frequency analysis results
a—well A;b—well B;c—well C

Reconstructed seismic section through three well-known wells

Comparison of sensitive frequency reconstruction volume and original data amplitude attribute
a—original seismic amplitude attribute;b—sensitive frequency reconstruction data amplitude attribute

Cross-P₁ well-A well sensitive frequency reconstruction profile

Comparison of the amplitude properties of the sensitive frequency reconstructed body and the original data in P₂ well area
a—original seismic amplitude attribute;b—sensitive frequency reconstruction data amplitude attribute

Comparison of the amplitude properties of the sensitive frequency reconstructed body and the original data in P₃ well area
a—original seismic amplitude attribute;b—sensitive frequency reconstruction data amplitude attribute

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