压缩感知提频技术在莺琼盆地W1井区地震资料处理中的应用
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1.中海石油中国有限公司海南分公司研究院;2.中国地质大学北京 地球物理与信息技术学院

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Application of Compressed Sensing frequency lifting method in seismic data processing of well W1 in the Yingqiong Basin
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1.Research Institute of Hainan Branch,CNOOC,Haikou;2.School of Geophysics and Information Method,China University of Geosciences Beijing,Beijing

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    摘要:

    针对莺琼盆地地震资料分辨率低、砂体展布及叠置关系复杂的问题,综合莺琼盆地W1井区三个年份的原始资料,设计了一套包括预处理,去噪处理,偏移以及偏后处理的整套资料处理流程。在偏后处理中将压缩感知提频技术应用于叠前深度偏移剖面上,并且与蓝色滤波提频技术,零相位反褶积提频技术进行了对比,体现了压缩感知提频技术的优势,并运用压缩感知提频技术解决了目前存在的地质问题,证明了它在莺琼盆地后续开发实施上的合理性。结果表明:相较于其他两种提频技术,采用压缩感知提频技术可以保护主频以下可靠的低频信息,拓展高频,提高了资料的分辨率。通过压缩感知提频后的地震数据,砂体的叠置特征得以揭示,验证了其对后续反演工作也有一定帮助。压缩感知提频技术作为一种新的地震资料处理技术,能够较好地解决地震资料分辨率低、砂体展布及叠置关系复杂等问题,值得在实际地震资料处理中推广应用。

    Abstract:

    In order to solve the problems of low resolution seismic data and complex sand body distribution and overlapping relationship in Yingqiong Basin, a complete data processing process including preprocessing, denoising, migration and bias post-processing is designed based on the original data of three years. In post processing, compressed sensing frequency lifting method was applied to pre-stack depth migration profile, and compared with blue filtering frequency lifting method and zero phase deconvolution frequency lifting method. The advantages of compressed sensing frequency lifting method were demonstrated, and the application of compressed sensing frequency lifting method to solve current geological problems proved its rationality in the subsequent development and implementation of the Yingqiong Basin. The results show that compared with the other two frequency lifting methods, compressed sensing frequency lifting method can protect the reliable low frequency information below the main frequency, expand the high frequency, and improve the data resolution. By comparing the waveform inversion results before and after compressed sensing frequency lifting, the superimposed characteristics of sand bodies can be revealed, and it is also helpful for the subsequent inversion work. As a new seismic data processing method, compressed sensing frequency lifting method can better solve the problems of low seismic data resolution, sand body distribution and complex overlapping relationship, and it is worth popularizing and applying in practical seismic data processing.

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历史
  • 收稿日期:2023-08-08
  • 最后修改日期:2023-09-27
  • 录用日期:2023-10-07
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