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首页» 过刊浏览» 2023» Vol.8» Issue(3) 290-302     DOI : 10.3969/ j.issn.2096-1693.2023.03.021
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基于层序统计结构和空间地质结构的深度学习高分辨率处理方法
高洋, 孙郧松, 王文闯, 李国发
1 中国石油大学(北京)油气资源与探测国家重点实验室,北京 102249 2 东方地球物理勘探有限责任公司物探技术研究中心,涿州 072751
A deep learning method for high-resolution seismic processing based on a layered statistical structure and a spatial geological structure
GAO Yang, SUN Yunsong, WANG Wenchuang, LI Guofa
1 State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum-Beijing, Beijing 102249, China 2 Research & Development Center of BGP, CNPC, Zhuozhou 072751, China

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摘要  高分辨率地震数据在地震数据处理中扮演着关键角色, 它可以提供更 准确的储层识别和描绘。本文提出了一种基于深度学习的高分辨率 处理技术,从原始的低频地震数据中直接生成地质有效且结构兼容 的高分辨率地震数据。使用具有真实特征的自动生成的合成数据进 行训练,本文的网络对噪声具有更好的鲁棒性,可以产生更精确且 横向连续性更好的高分辨率结果。
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关键词 : 深度学习,高分辨率处理,残差模块,薄层恢复,人工智能
Abstract

High-resolution seismic data processing plays a crucial role in the depiction and characterization of reservoir structures, especially when exploration targets become increasingly complex. In recent years, with the rapid development of deep learning technology, it has been increasingly introduced  into high-resolution seismic data processing. Based on a large amount of labeled data, complex nonlinear relationships between low-resolution seismic data and high-resolution seismic data are established. However, the accuracy and stability of the results generated by deep learning in high-resolution data processing highly depend on the accuracy and diversity of training sets. One of the main challenges of practical application of deep learning-based high-resolution reconstruction in production is the sparse well data, which often leads to limited training sets. To address this issue, this paper proposes a deep learning-based high-resolution processing method that integrates the layered structure represented by well data and the spatial geological structure represented by seismic data in the working area by using numerous and realistic training sets. The establishment of the training sets includes three steps. (1) Calculate the impedance sequence using well data, fit the amplitude distribution of the high-frequency part of the impedance using a Gaussian matching function to obtain a probability density function (PDF), and generate a series of impedance sequences that conform to the statistical distribution of the well data. (2) On the basis of the impedance sequences, establish a two-dimensional horizontal impedance model, and gradually add folding deformation, dip deformation, and fault deformation to generate a two-dimensional impedance model containing various geological patterns. (3) Calculate the reflection coefficient using the impedance model, and then convolute the low-frequency and high-frequency wavelets with the reflection coefficient model to obtain the training sets. By automatically generating a large number of training sets with underground geological knowledge, the trained network can estimate stable and accurate high-resolution results. The framework of deep learning is composed of two parts: an encoding part that extracts features from the input data and a decoding part that reconstructs the output from the extracted features. In addition, residual modules are incorporated into the framework to enhance performance by enabling the network to learn more effectively from the training sets, resulting in a better balance between computational accuracy and efficiency. Synthetic data and field data tests show that the proposed method has better robustness to noise and can yield more accurate and laterally more consistent high-resolution results compared to traditional deep learning methods.

Key words: deep learning; high-resolution processing; residual module; thin layer reconstruction; artificial intelligence
收稿日期: 2023-06-29     
PACS:    
基金资助:中国石油天然气集团有限公司科学研究与技术开发项目(2021ZG03、 2021DJ1206) 联合资助
通讯作者: lgfseismic@126.com
引用本文:   
高洋, 孙郧松, 王文闯, 李国发. 基于层序统计结构和空间地质结构的深度学习高分辨率处理方法. 石油科学通报, 2023, 03: 290-302 GAO Yang, SUN Yunsong, WANG Wenchuang, LI Guofa. A deep learning method for high-resolution seismic processing based on a layered statistical structure and a spatial geological structure. Petroleum Science Bulletin, 2023, 03: 290-302.
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