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The application of three-dimensional seismic spectral decomposition and semblance attribute to characterizing the deepwater channel depositional elements in the Taranaki Basin of New Zealand

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Acta Oceanologica Sinica 2017年第9期36卷 79-86页

作者： LI Quan WU Wei YU Shui KANG Hongquan TONG Liqing CAO Xiangyang LIU Xiaolong Overseas Evaluation Center China National Offshore Oil Corporation Research Institute Beijing 100028 China Institute of Resources and Environment Henan Polytechnic University Iiaozuo 454003 China Collaborative Innovation Center of Coalbed Methane and Shale Gas for Central Economic Region Henan Polytechnic University Jiaozuo 454003 China Bureau of Geophysical Prospecting Offshore China National Petroleum Corporation Tianjin 300280 China

In the past few years, three-dimensional（3-D） seismogram has become an essential tool for the interpretation of subsurface stratigraphy and depositional systems. Seismic stratigraphy in conjunction with seismic geomorphology has elevated the degree to which seismic data can facilitate geological interpretation, especially in a deepwater environment. Technologies such as time slicing and interval attribute analysis can enhance geomorphological interpretations, and, when integrated with stratigraphic analyses, can yield insights regarding distribution of seal and reservoir facies. Multiple attributes corendering can further bring out features of geological interest that other technologies may overlook. This method involves corender spectral decomposition components（SDC） with semblance attributes to describe the distribution of deepwater channel elements and the boundaries of deepwater sinuous channel. Applying this technology to four elements is observed：（1） point-bars,（2） migration of channel meander loops,（3） channel erosion/cut, and（4） avulsion. The planview expression of the deepwater channel ranges from low sinuosity to high sinuosity. Furthermore, this technology has enabled interpreters to visualize details of complex depositional elements and can be used to predict net-to-gross ratio in channel systems, which can be incorporated into borehole planning for exploration as well as development needs to improve risk management significantly. The technology is applied to the study area in an effort to illustrate the variety of interpretation technologies available to the geoscientist.

关键词： deepwater channel spectral decomposition semblance depositional elements deepwater Taranaki Basin

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Inverse spectral decomposition using an I_p-norm constraint for the detection of close geological anomalies

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Petroleum Science 2020年第6期17卷 1463-1477页

作者： San-Yi Yuan Shan Yang Tie-Yi Wang Jie Qi Shang-Xu Wang State Key Laboratory of Petroleum Resources and Prospecting CNPC Key Laboratory of Geophysical ExplorationChina University of PetroleumBeijing 102249China SINOPEC Petroleum Exploration and Production Research Institute Beijing 100083China ConocoPhillips School of Geology and Geophysics University of OklahomaNormanOK 73019-0390USA

An important application of spectral decomposition(SD)is to identify subsurface geological anomalies such as channels and karst caves,which may be buried in full-band seismic ***,the classical SD methods including the wavelet transform(WT)are often limited by relatively low time-frequency resolution,which is responsible for false high horizonassociated space resolution probably indicating more geological structures,especially when close geological anomalies *** address this issue,we impose a constraint of minimizing an lp(0spectral coefficients on the misfit derived by using the inverse WT and apply the generalized iterated shrinkage algorithm to invert for the optimal *** with the WT and inverse SD(ISD)using a typical l1-norm constraint,the modified ISD(MISD)using an lp-norm constraint can yield a more compact spectrum contributing to detect the distributions of close geological *** design a 3 D synthetic dataset involving frequency-close thin geological anomalies and the other3 D non-stationary dataset involving time-close anomalies to demonstrate the effectiveness of *** application of 4 D spectrum on a 3 D real dataset with an area of approximately 230 km2 illustrates its potential for detecting deep channels and the karst slope fracture zone.

关键词： spectral decomposition Seismic interpretation Inverse problem High resolution Deep exploration

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Mapping of thin sandstone reservoirs in bisol field, Niger delta, Nigeria using spectral decomposition technique

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Geodesy and Geodynamics 2021年第1期12卷 54-64页

作者： Oyelowo Gabriel Bayowa Theophilus Aanuoluwa Adagunodo Adeola Opeyemi Oshonaiye Bisola Stella Boluwade Department of Earth Sciences Ladoke Akintola University of TechnologyP.M.B.4000OgbomosoOyo StateNigeria Department of Physics Covenant UniversityP.M.B.1023OtaOgun StateNigeria

This study focuses on using spectral decomposition(SD)technique to characterize complicated reservoirs to understand the structural and stratigraphic variations in the interpreted horizons from Bisol *** purpose of this study is to use geophysical and well logging data sets to map the thin-bedded sandstone reservoirs and prospect zones within the multiple reservoirs in Bisol field,Niger *** interpretation of faults and horizons was carried out on the seismic section,which was further used to produce the structural *** attributes such as trace and variance were used to enhance the truncated structures from the seismic section,while the produced spectra were used to delineate the stratigraphy and thickness of the thin-bedded *** sandstone reservoirs were identified from well logs and consequently mapped on the seismic *** Fourier Transform workflow was successfully used to image the stratigraphic features in the study *** horizons(S1T,S2T and S3T)were delineated from the seismic section,and four reservoirs were mapped and correlated across the *** analyses from the seismic sectional view revealed some thin pay sandstone reservoirs,which were characterized by high *** new probable zones(Prospect A,B and C)of hydrocarbon accumulation were identified using the SD technique.

关键词： Fast Fourier Transform spectral decomposition Thin sandstone reservoirs 3D seismic Well logs

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lp norm inverse spectral decomposition and its multi-sparsity fusion interpretation

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Applied Geophysics 2021年第4期18卷 569-578,595页

作者： Li Sheng-Jun Wang Tie-Yi Gao Jian-Hu Liu Bing-Yang Gui Jin-Yong Wang Hong-Qiu Research Institute of Petroleum Exploration and Development-Northwest PetrochinaLanzhou 730020GansuChina. State Key Laboratory of Petroleum Resources and Prospecting China University of PetroleumChangpingBeijing 102249China. SINOPEC Petroleum Exploration&Production Research Institute Beijing 100083China.

spectral decomposition has been widely used in the detection and identifi cation of underground anomalous features(such as faults,river channels,and karst caves).However,the conventional spectral decomposition method is restrained by the window function,and hence,it mostly has low time–frequency focusing and resolution,thereby hampering the fi ne interpretation of seismic *** solve this problem,we investigated the sparse inverse spectral decomposition constrained by the lp norm(0spectral attribute interpretation method based on multiresolution time–frequency feature *** comprehensively analyzing the time–frequency spectrum results constrained by the diff erent p-norms,we can obtain more refined interpretation results than those obtained by the traditional strategy,which incorporates a single norm ***,the proposed strategy was applied to the processing and interpretation of actual three-dimensional seismic data for a study area covering about 230 km^(2) in western *** results reveal that the surface water system in this area is characterized by stepwise convergence from a higher position in the north(a buried hill)toward the south and by the development of *** thus demonstrated that the proposed method has huge application potential in seismic interpretation.

关键词： spectral decomposition lp norm multiresolution time–frequency feature fusion seismic interpretation fi ne interpretation

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Application of Wavelet spectral decomposition for Geological Interpretation of Seismic Data

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Journal of Geological Resource and Engineering 2016年第5期4卷 231-241页

作者： Butorin A. V. Expert Department of Geology and Exploration LLC "Gazpromnefi Science & Technology Centre" emb. rekiMoyki 75-79Saint-Petersburg 190000 Russia

Modem oil industry is on the way of complication of the geological structure to use the latest technologies to analyze available geological and geophysical algorithm---continuous wavelet transform in example of synthe... 详细信息

关键词： Seismic interpretation spectral decomposition RGB-blend Achimov formation.

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Comparison of different spectral decompositions for non-marine deep water sandstone reservoir prediction in the Xingma area

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Mining Science and Technology 2010年第3期20卷 439-445页

作者： ZHAO Haitao SUN Zandong LIU Lifeng SUN Wenbo Laboratory of lntegration of Geology and Geophysics China University of Petroleum Beijing 102249 China State Key Laboratory of Petroleum Resource and Prospecting China University of Petroleum Beijing 102249 China

It is difficult to identify and predict non-marine deep water sandstone reservoir facies and thickness,using routine seismic analyses in the Xingma area of the western Liaohe sag,due to low dominant frequencies,low signal-to-noise ratios,rapid lateral changes and high frequencies of layered *** this problem,four types of frequency spectral decomposition techniques were tested for reservoir *** these,the non-orthogonal Gabor-Morlet wavelet frequency decomposition method proved to be the best,was implemented directly in our frequency analysis and proved to be adaptable to non-stationary signals as *** method can overcome the limitations of regular spectral decomposition techniques and highlights local features of reservoir *** results are found to be in good agreement with well *** this method and a 3-D visualization technology, the distribution of non-marine deep water sandstone reservoirs can be precisely predicted.

关键词： spectral decomposition reservoir prediction non-marine deep water sandstone reservoir western Liaohe sag

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Visualization and selection of Dynamic Mode decomposition components for unsteady flow

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Visual Informatics 2021年第3期5卷 15-27页

作者： T.Krake S.Reinhardt M.Hlawatsch B.Eberhardt D.Weiskopf Visualization Research Center(VISUS) Allmandring 1970569 StuttgartGermany Hochschule der Medien Nobelstraße 1070569 StuttgartGermany

Dynamic Mode decomposition(DMD)is a data-driven and model-free decomposition *** is suitable for revealing spatio-temporal features of both numerically and experimentally acquired ***,DMD performs a low-dimensional spectral decomposition of the data into the following components:the modes,called DMD modes,encode the spatial contribution of the decomposition,whereas the DMD amplitudes specify their *** associated eigenvalue,referred to as DMD eigenvalue,characterizes the frequency and growth rate of the DMD *** this paper,we demonstrate how the components of DMD can be utilized to obtain temporal and spatial information from time-dependent flow *** begin with the theoretical background of DMD and its application to unsteady ***,we examine the conventional process with DMD mathematically and put it in relationship to the discrete Fourier *** analysis shows that the current use of DMD components has several *** resolve these problems we adjust the components and provide new and meaningful insights into the decomposition:we show that our improved components capture the spatio-temporal patterns of the flow ***,we remove redundancies in the decomposition and clarify the interplay between components,allowing users to understand the impact of *** new representations,which respect the spatio-temporal character of DMD,enable two clustering methods that segment the flow into physically relevant sections and can therefore be used for the selection of DMD *** a number of typical examples,we demonstrate that the combination of these techniques allows new insights with DMD for unsteady flow.

关键词： Dynamic Mode decomposition spectral decomposition

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RANDOM ATMOSPHERIC PRESSURE AT THE FREE SURFACE AND MICROSEISMS IN DEEP OCEAN

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Journal of Hydrodynamics 2008年第6期20卷 741-748页

作者： LE Jia-chun Shanghai Institute of Applied Mathematics and Mechanics Shanghai University Shanghai 200072 China

A general stochastic model of the atmospheric pressure at the ocean surface was proposed, in which the pressure variation was represented by a spectral decomposition through a random process of orthogonal increments. From the basic equations of ideal and incompressible fluid a set of perturbation equations up to second order had been derived and solved. The pressure variation in the flow field had been calculated using the explicit solutions obtained, and which demonstrated a clear relation between the atmospheric pressure and the one at the bottom of deep ocean. It can be seen that there is a part of the pressure variation which is not attenuating with the depth. The result had been compared with those of Longuet-Higgins and Kadota et al. and all previous results are contained in the solution given in this artice. The restriction on the previous works with regard to the probability law has been removed, and all conclusions are deduced without specific assumptions. The flexibility of the proposed model allows for further generalization and extension in the physical aspects and statistical treatment.

关键词： random waves water waves nonlinear interaction orthogonal increments spectral decomposition microseism

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Quantifying spectral thermal transport properties in framework of molecular dynamics simulations:a comprehensive review

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Rare Metals 2023年第12期42卷 3914-3944页

作者： Yi-Xin Xu Hong-Zhao Fan Yan-Guang Zhou Department of Mechanical and Aerospace Engineering The Hong Kong University of Science and TechnologyHong Kong 999077China HKUST Shenzhen-Hong Kong Collaborative Innovation Research Institute Shenzhen 518000China

Over the past few decades,significant progress has been made in micro-and nanoscale heat *** computational methods have been developed to quantitatively characterize the thermal transport in bulk materials and across the interfaces,which benefit the thermal management design in microelectronics and energy conversion in thermoelectrics *** this paper,the methods and studies on quantifying thermal transport properties using molecular dynamics simulations are comprehensively *** classical methods based on molecular dynamics simulations are first introduced,i.e.,equilibrium molecular dynamics and nonequilibrium molecular dynamics,to calculate the thermal transport properties in bulk materials and across the *** spectroscopy methods are then reviewed,which are developed in the framework of equilibrium molecular dynamics(i.e.,time domain normal mode analysis,spectral energy density,Green-Kubo modal analysis) and methods proposed based on the nonequilibrium molecular dynamics(i.e.,time domain direct decompose method,frequency domain direct decompose method and spectral heat flux method).In the subsequent section,the calculations of spectral thermal conductivities using these computational methods in various systems are presented,including simple crystals,low-dimensional materials,complex materials and *** that,spectral thermal transport across the interfacial systems is discussed,which includes solid/solid interfaces,solid/solid interfaces with interfacial engineering and solid/liquid *** fundamental challenges in molecular dynamics simulations,such as including quantum effects and quantifying the anharmonic contributions,are discussed as ***,some open problems on spectroscopy thermal transport properties in the framework of molecular dynamics simulations are given in the summary.

关键词： Thermal transport spectral decomposition Molecular dynamics simulations Interfacial thermal transport Complex system

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Time Decay Rates of the Isotropic Non-Newtonian Flows in R^n

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Acta Mathematicae Applicatae Sinica 2007年第1期23卷 99-106页

作者： Bo-Qing Dong School of Mathematical Sciences Nankai University Tianjin 300071 China

This paper is concerned with time decay rates for weak solutions to a class system of isotropic incompressible non-Newtonian fluid motion in R^n. With the use of the spectral decomposition methods of Stokes operator, the optimal decay estimates of weak solutions in L^2 norm are derived under the different conditions on the initial velocity. Moreover, the error estimates of the difference between non-Newtonian flow and Navier-Stokes flow are also investigated.

关键词： L^2 decay spectral decomposition non-Newtonian flows

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