An interpretative high-resolution seismic data processing method based on multi-level fractional calculus
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GAO Lijun,male,born in 1988,senior engineer,PhD’s candidate,focusing on seismic imaging process. E-mail:gaolij.xbsj@sinopec.com |
Received date: 2025-05-26
Revised date: 2025-05-31
Online published: 2025-11-06
Supported by
Study on identification,description and evaluation technology of ultra-deep and super-deep carbonate rock traps(P24136)
Integrated research and application of ultra-deep and super-deep drilling geological engineering(P24009)
In seismic exploration,high-resolution seismic reflection imaging data volumes are critical tools for achieving fine identification of thin sandstone bodies and fault structures in sedimentary basins. However,actual seismic imaging profiles often face the loss of low- and high-frequency signals,leading to low seismic imaging resolution and ineffective identification of oil,gas,uranium,coal,and other mineral resources. In signal processing,integral and differential algorithms of effective signals respectively reflect their low- and high-frequency components. Based on this principle,this paper proposes an interpretative high-resolution processing method using multi-level fractional calculus. By separately calculating different fractional-order components of effective signals,the missing low- and high-frequency components in seismic imaging profiles are obtained. Through the introduction of multivariate Gaussian theory,Bayesian theory,and statistical inversion to improve the solving process of weighting coefficients,a broadband high-resolution seismic imaging profile is established. Compared with traditional calculus-based high-resolution processing methods,this method effectively enhances the accuracy of weighting coefficient determination and avoids the impact of calculation errors on precision. Processing results from both onshore and offshore actual data demonstrate that the proposed method significantly improves the resolution and frequency bandwidth of seismic data,thereby enhancing high-resolution identification of sand bodies and related structures.
GAO Lijun , LI Haiying , YANG Wei , GONG Wei , LI Qingqing . An interpretative high-resolution seismic data processing method based on multi-level fractional calculus[J]. World Nuclear Geoscience, 2025 , 42(3) : 552 -564 . DOI: 10.3969/j.issn.1672-0636.2025.03.007
图6 提频前后频谱对比a—原始数据频谱;b—常规提频方法数据频谱;c—多级分数阶提频方法数据频谱。 Fig. 6 Spectrum comparison before and after frequency enhancement a-Frequency spectrum of the original seismic data;b-Frequency spectrum of seismic data using conventional method;c-Frequency spectrum of seismic data after multi-level fractional calculus. |
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