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Fast Streaming Local Time-Frequency Transform for Nonstationary seismic data processing

IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING 2025年 63卷

作者： Chen, Jiawei Liu, Yang Tian, You Xie, Peihong Jilin Univ Coll Geoexplorat Sci & Technol Changchun 130026 Peoples R China

The time-frequency analysis serves as a useful approach to solve different complex problems in seismic data processing. From a practical standpoint, the majority of time-frequency transform techniques frequently grapple with the tradeoff between time and frequency localization adaptability, flexibility in sampling time and frequency, and the pursuit of computational efficiency. To address this, we tailor the streaming computation to implement a fast time-frequency transform, namely, the streaming local time-frequency transform (SLTFT), which can significantly decrease the computational cost of adaptive time-frequency analysis. We add a localization scalar to the proceeding streaming algorithm to circumvent the need for taper functions, which provides rapid forward and inverse transforms and applicability in various scenarios. We demonstrate the adaptive time-frequency characteristics of the proposed method, which offers a nonstationary time-frequency representation with variable time-frequency localization. Numerical tests indicate that the proposed SLTFT is a more balanced method compared with previous time-frequency adaptive transforms. It proves suitable for a range of practical applications in nonstationary seismic data processing, including ground-roll attenuation, inverse-Q filtering, and multicomponent data registration.

关键词： Time-frequency analysis Transforms Location awareness Computational efficiency Mathematical models Continuous wavelet transforms Complexity theory Smoothing methods Minimization Indexes Ground-roll attenuation nonstationary representation seismic data processing streaming computation time-frequency transform

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seismic data processing method based on wavelet transform for de-noising

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CLUSTER COMPUTING-THE JOURNAL OF NETWORKS SOFTWARE TOOLS AND APPLICATIONS 2019年第3-Sup期22卷 S6609-S6620页

作者： Lu, Yong Huang, Yongming Xue, Wei Zhang, Guobao Earthquake Adm Jiangsu Prov Nanjing 210014 Jiangsu Peoples R China Southeast Univ Sch Automat Nanjing 210096 Jiangsu Peoples R China Southeast Univ Key Lab Measurement & Control CSE Sch Automat Minist Educ Nanjing 210096 Jiangsu Peoples R China

The earthquakes happened around the world have brought irreparable damage to humans. In order to reduce losses, scholars from all over the world are committed to studying the information contained in the magnetotelluric signals. The detecting instrument arranged in the field or in the Seismological Bureau station are usually interfered by noises, so the problem of how to remove these noise is the research content of this paper. This paper is based on the wavelet transform and fast Fourier transform, and it first uses the appropriate wavelet base to decompose the signal in multi-level, and then uses the fast Fourier transform to obtain the spectrum of signal in each layer, then uses the spectrum to select the appropriate decomposition order, and carries out threshold de-noising on signal, finally reconstructs and calculates the signal after noise reduction. In this paper, the principle and steps of dealing with the signal are given out, and the analog signal and measured signal are simulated through MATLAB, so as to verify the effectiveness. The results show that, the wavelet transform has good effect in dealing with the magnetotelluric signal, which can remove the noise signal well and keep the energy characteristic of the original signal, and is convenient for follow-up analysis.

关键词： Wavelet transform seismic data processing Denoise

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Time-frequency domain SNR estimation and its application in seismic data processing

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JOURNAL OF APPLIED GEOPHYSICS 2014年 107卷 25-35页

作者： Zhao, Yan Liu, Yang Li, Xuxuan Jiang, Nansen China Univ Petr State Key Lab Petr Resources & Prospecting Beijing Peoples R China China Univ Petr CNPC Key Lab Geophys Prospecting Beijing Peoples R China CNOOC Petr Res Ctr Beijing Peoples R China

Based on an approach estimating frequency domain signal-to-noise ratio (FSNR), we propose a method to evaluate time-frequency domain signal-to-noise ratio (TFSNR). This method adopts short-time Fourier transform (STFT) to estimate instantaneous power spectrum of signal and noise, and thus uses their ratio to compute TFSNR. Unlike FSNR describing the variation of SNR with frequency only, TFSNR depicts the variation of SNR with time and frequency, and thus better handles non-stationary seismic data. By considering TFSNR, we develop methods to improve the effects of inverse Q filtering and high frequency noise attenuation in seismic data processing. Inverse Q filtering considering TFSNR can better solve the problem of amplitude amplification of noise. The high frequency noise attenuation method considering TFSNR, different from other de-noising methods, distinguishes and suppresses noise using an explicit criterion. Examples of synthetic and real seismic data illustrate the correctness and effectiveness of the proposed methods. (C) 2014 Elsevier B.V. All rights reserved.

关键词： Time-frequency domain signal-to-noise ratio seismic data processing Inverse Q filtering High frequency noise attenuation

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seismic data processing of Western Nankai Trough and the Character of its Bottom-simulating Reflector

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Chinese Journal of Geophysics 2013年第6期44卷 785-790页

作者： Hai-Bin SONG Osamu MATSUBAYASHI Shin'ichi KURAMOTO Institute of Geology and Geophysics CAS Beijing 100101 China Geological Survey of Japan Tsukuba 3058567 Japan

Reprocessing of NT62-2 seismic line of western Nankai Trough has been conducted to focus on the character of the distribution of bottom-simulating reflector(BSR). The appearances of BSR on the near-offset profile, the stack profile, the migration profile, the instantaneous amplitude profile and the instantaneous phase profile are compared and described. They are also distinguished in shot gathers and CMP gathers. There are some evidence of BSRs on the near-offset profile, and better images of BSR can be obtained by stack and migration. The character of strong amplitude of BSR can be easily seen on the instantaneous amplitude profile. And they are clearly mapped on the instantaneous phase profile.

关键词： Gas hydrates Western Nankai Trough Bottom-simulating reflector seismic data processing

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The design and operation of a small seismic data processing system at the bureau of mineral resources

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Exploration Geophysics 1986年第3期17卷 147-155页

作者： Kravis, S.P. Brassil, F.M. Division of Marine Geosciences and Petroleum Geology Bureau of Mineral Resources Geology & Geophysics Canberra ACT 2601 GPO Box 378 Australia

Most organizations requiring seismic data processing facilities either buy commercially produced systems, or use contractor processing. Presented here is an overview of the design, implementation, and operation of a system built in-house for processing small volumes of marine seismic data collected by the Bureau of Mineral Resources (BMR). This system was implemented prior to the delivery of the new BMR processing centre. The system is based on an HP 1000 F-series minicomputer, and a CSPI MAP-300 array processor, and uses disc rather than magnetic tape as the main data storage medium. Much attention has been given to making the system easily usable by non-specialists, and the system design allows easy modification of existing processes and addition of new ones. processing facilities are mainly orientated towards shallow, high resolution data recorded with a sparker source, but the system has also been used for processing deep crustal land data, and deep water marine data. The quality of the processed sparker data has been as good as or better than the same data processed commercially;this is mainly due to the use of a new deconvolution technique. The processing system as a whole would be appropriate for a user who did not require, or could not afford, the capacity of a larger commercial system, but who has a need to process a modest and continuing stream of data. The success of the project indicates that it is possible for small organizations to acquire a seismic data processing capacity at a relatively low capital cost. © ASEG 1986.

关键词： Array processor Design Disc Minicomputer Operation processing system seismic data processing

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Performance Evaluation of Open Source seismic data processing Packages

Performance Evaluation of Open Source Seismic Data Processin...

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11th International Conference on Algorithms and Architectures for Parallel processing (ICA3PP)

作者： Aziz, Izzatdin A. Goscinski, Andrzej M. Hobbs, Michael M. Deakin Univ Fac Sci & Technol Sch Informat Technol Geelong Vic 3217 Australia

ISBN: (纸本)9783642246494

In many businesses, including hydrocarbon industries, reducing cost is of high priority. Although hydrocarbon industries appear able to afford the expensive computing infrastructure and software packages used to process seismic data in the search for hydrocarbon traps, it is always imperative to find ways to minimize cost. seismic processing costs can be significantly reduced by using inexpensive, open source seismic data processing packages. However, hydrocarbon industries question the processing performance capability of open source packages, claiming that their seismic functions are less integrated and provide almost no technical guarantees for one to use. The objective of this paper is to demonstrate, through a comparative analysis, that open source seismic data processing packages are capable of executing the required seismic functions on an actual industrial workload. To achieve this objective we investigate whether or not open source seismic data processing packages can be executed using the same set of seismic data through data format conversions, and whether or not they can achieve reasonable performance and speedup when executing parallel seismic functions on a HPC cluster. Among the few open source packages available on the Internet, the subjects of our study are two popular packages: seismic UNIX (SU) and Madagascar.

关键词： High performance computing open source seismic data processing packages seismic data processing seismic UNIX Madagascar

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seismic data processing Approaches for the Study of Gas Hydrates in the East China Sea

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Journal of Ocean University of Qingdao 2002年第1期1卷 87-92页

作者： LIU Huaishan ZHOU Zhengyun College of Marine Geosciences Ocean University of QingdaoQingdao 266003P.R.China

A comprehensive study of the data profiles, including the 2D seismic data, single channel seismic data, shallow sections, etc., reveals that gas hydrates occur in the East China Sea. A series of special techniques are used in the processing of seismic data, which include enhancing the accuracy of velocity analysis and resolution, estimating the wavelet, suppressing the multiple, preserving the relative amplitude, using the DMO and AVO techniques and some special techniques in dealing with the wave impedance. The existence of gas hydrates is reflected in the subbottom profiles in the appearance of BSRs, amplitude anomalies, velocity anomalies and AVO anomalies, etc. Hence the gas hydrates can be identified and predicted. It is pointed out that the East China Sea is a favorable area of the gas hydrates resource, and the Okinawa Trough is a target area of gas hydrates reservoir.

关键词： gas hydrates seismic data processing seismic characteristic bottom simulating reflector(BSR)

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seismic data processing and Interpretation on the Loess Plateau, Part1: seismic data processing

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Applied Geophysics 2005年第4期2卷 241-246页

作者：蒋茄钰付守献李九灵东方地球物理公司研究院长庆分院西安长庆兴隆园区710021

Branching river channels and the coexistence of valleys, ridges, hiils, and slopes＇as the result of long-term weathering and erosion form the unique loess topography. The Changqing Geophysical Company, working in these complex conditions, has established a suite of technologies for high-fidelity processing and fine interpretation of seismic data. This article introduces the processes involved in the data processing and interpretation and illustrates the results.

关键词： loess plateau seismic data processing statics bin optimization noise attenuation data interpretation

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Application of parallel computers in seismic data processing in Miyang Depression

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Jianghan Shiyou Xueyuan Xuebao/Journal of Jianghan Petroleum Institute 2004年第1期26卷 60-61+iv页

作者： Fang, Jiang-Xue Chen, Ming-Jun Feng, Quan-Dong Shi, Jun-Chao Shi, Yan-Hua Henan Oilfield Branch Company SINOPEC Nanyang 473132 China

Based on the behavior and characteristics of parallel computers, application of the computers in seismic data processing in Miyang Depression is discussed in combination of the actual demands of petroleum exploration and seismic data processing. The results of application shows that the parallel computers could greatly shorten the period of seismic data processing, at the same time it could improve the processing quality and efficiency of the data processing.

关键词： Contrast of seismic profile Miyang Depression Parallel computer seismic data processing

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Improved seismic data processing and interpretation for stratistructural petroleum plays in the north of Al-Khafji area, Middle-East

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ASEG Extended Abstracts 2007年第1期2007卷 1-8页

SummarySummaryseismic data with appropriate processing tools, often come to the rescue of interpretation, minimizing the ambiguities involved in analysing complex geological situations. Stratigraphic features associated with structure, play critical role in hydrocarbon entrapment within the Middle- Late Cretaceous reservoirs in the Al-Khafji offshore area. A total of 61 square kilometres high resolution 3D OBC seismic data were acquired in the North Khafji area, with objectives to explore strati-structural traps and their associated reservoir settings. New petroleum plays are intended to be explored after integrating new 3D seismic vintage with older Al-Khafji seismic data *** study is aimed at comparing seismic datasets that are processed by different companies. Authors examine and identify the relative merits of data attributes that are suitable for structural and strati-structural traps interpretation. The initial interpretation done during 1997, reports a possible carbonate build-up, correlatable to Gudair formation, which is equivalent to a horizon associated with Aruma-Wasia unconformity. Comparative study made between Khafji and north of Khafji field could not conclusively establish the extension of this carbonate build-up in the North-Khafji area, because of ambiguous nature of structural and stratigraphic anomalies. At places, there is inconsistency among scales of these datasets. However, based on the interpretation of the newly processed seismic data, seismic structure and attributes have been integrated and reinterpreted for scalable anomalies. Present study strongly suggests an exploration potential in the North-Khafji area and stipulates pursuing further geological studies, detailing these seismic anomalies and converting them into commercial petroleum plays in the offshore basin.

关键词： seismic data processing data interpretation petroleum system structural plays Arabian Gulf

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