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Petroleum Science 2022年第6期19卷 2711-2719页

作者： Yu-Hang Sun Yang Liu CNPC Key Laboratory of geophysical prospecting and State Key Laboratory of Petroleum Resources and prospecting China University of Petroleum(Beijing)Beijing102249China China University of Petroleum(Beijing) Karamay CampusKaramayXinjiang834000China

Model-driven and data-driven inversions are two prominent methods for obtaining P-wave impedance,which is significant in reservoir description and *** on proper initial models,most model-driven methods primarily use the limited frequency bandwidth information of seismic data and can invert P-wave impedance with high accuracy,but not high *** data-driven methods mainly employ the information from well-log data and can provide high-accuracy and highresolution P-wave impedance owing to the superior nonlinear curve fitting capacity of neural ***,these methods require a significant number of training samples,which are frequently *** obtain P-wave impedance with both high accuracy and high resolution,we propose a model-data-driven inversion method using Res Nets and the normalized zero-lag cross-correlation objective function which is effective for avoiding local minima and suppressing random *** using initial models and training samples,the proposed model-data-driven method can invert P-wave impedance with satisfactory accuracy and *** on synthetic and field data demonstrate the proposed method’s efficacy and practicability.

关键词： Model-data-driven P-wave impedance inversion Res Nets Zero-lag cross-correlation

Enhancing the resolution of seismic data based on the generalized S-transform

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Petroleum Science 2009年第2期6卷 153-157页

作者： Tian Jianhua Song Wei Yang Feizhou State Key Laboratory of Petroleum Resource and prospecting China University of Petroleum Beijing 102249 China Key Laboratory of CNPC geophysical prospecting China University of Petroleum Beijing 102249 China

In this paper, we analyze the seismic signal in the time-frequency domain using the generalized S-transform combined with spectrum modeling. Without assuming that the reflection coefficients are random white noise as in the conventional resolution-enhanced techniques, the wavelet which changes with time and frequency was simulated and eliminated. After using the inverse S-transform for the processed instantaneous spectrum, the signal in the time domain was obtained again with a more balanced spectrum and broader frequency band. The quality of seismic data was improved without additional noise.

关键词： Time-frequency domain generalized S-transform spectrum modeling instantaneous spectrum balanced spectrum

Geochemistry of borehole cutting shale and natural gas accumulation in the deepwater area of the Zhujiang River Mouth-Qiongdongnan Basin in the northern South China Sea

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Acta Oceanologica Sinica 2018年第2期37卷 44-53页

作者： GAO Gang ZHANG Gongcheng CHEN Guo GANG Wenzhe SHEN Huailei ZHAO Ke State Key Laboratory of Petroleum Resource and prospecting China University of Petroleum (Beijing) Beijing 102249 China Research Institute CNOOC Beijing 100020 China geophysical Exploration Research Institute of Huabei Oilfield company Renqiu 062552 China

The Qiongdongnan Basin and Zhujiang River（Pearl River） Mouth Basin, important petroliferous basins in the northern South China Sea, contain abundant oil and gas resource. In this study, on basis of discussing impact of oil-base mud on TOC content and Rock-Eval parameters of cutting shale samples, the authors did comprehensive analysis of source rock quality, thermal evolution and control effect of source rock in gas accumulation of the Qiongdongnan and the Zhujiang River Mouth Basins. The contrast analysis of TOC contents and Rock-Eval parameters before and after extraction for cutting shale samples indicates that except for a weaker impact on Rock-Eval parameter S2, oil-base mud has certain impact on Rock-Eval S1, Tmax and TOC contents. When concerning oil-base mud influence on source rock geochemistry parameters, the shales in the Yacheng/Enping,Lingshui/Zhuhai and Sanya/Zhuhai Formations have mainly Type Ⅱ and Ⅲ organic matter with better gas potential and oil potential. The thermal evolution analysis suggests that the depth interval of the oil window is between 3 000 m and 5 000 m. Source rocks in the deepwater area have generated abundant gas mainly due to the late stage of the oil window and the high-supper mature stage. Gas reservoir formation condition analysis made clear that the source rock is the primary factor and fault is a necessary condition for gas accumulation. Spatial coupling of source, fault and reservoir is essential for gas accumulation and the inside of hydrocarbon-generating sag is future potential gas exploration area.

关键词： cutting shale organic geochemistry gas accumulation deepwater area Qiongdongnan Basin Zhujiang River Mouth Basin

Channel Sandstone Architecture Characterization by Seismic Simulation

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Journal of Earth Science 2019年第4期30卷 799-808页

作者： Hongwei Liang Xiaoqing Zhao Longxin Mu Zifei Fan Lun Zhao Shenghe Wu Research Institute of Petroleum Exploration and Development Beijing 100083China geophysical Research Center Bureau of Geophysical Prospecting IncorporationCNPCBaoding 072751China College of Geosciences China University of PetroleumBeijing 102249China

To describe the distribution of sandstone reservoirs between wells finely,this paper takes the sandstone reservoir of Layer Nm II-4 in Qinhuangdao 32-6 Oilfield for example,and uses the seismic forward simulation and well loggings to study the channel sandstone reservoir. Under the guidance of the modern rivers and outcrops sandstone distribution pattern,the predicting limitations of the seismic forward simulation about channel sandstone boundaries such as mudstone interlayer between channel sandstone and elevation distance between adjacent channel sandstone are clear. The research shows that the mudstone interlayer can be described by seismic forward simulation seismic when the mudstone interlayer is thicker than 2 m and the channel sandstone is thicker than 10 m because of the appearance of the seismic peak when the main frequency of seismic data is nearly 60 Hz. And the elevation distance between adjacent channel sandstone can be described by the seismic forward simulation when elevation distance is longer than 6 m and the channel sandstone is thicker than 10 m because of the appearance of the seismic peak. And the seismic waveform features of single channel sandstone boundaries such as elevation distance between channels,overbank sandstone and abandoned channels. Under the study mentioned above,the single channel boundaries are described in Layer Nm II-4 of Qinhuangdao 32-6 Oilfield,and the predicting boundaries are confirmed by the chemical tracers. The results show that the channel sandstone reservoir architecture characterization can be improved by the seismic forward simulation.

关键词： architecture overbank sandstone seismic abandoned channel

Automatic fracture–vug identification and extraction from electric imaging logging data based on path morphology

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Petroleum Science 2019年第1期16卷 58-76页

作者： Xi-Ning Li Jin-Song Shen Wu-Yang Yang Zhen-Ling Li State Key Laboratory of Petroleum Resources and prospecting China University of Petroleum CNPC Key Laboratory of geophysical prospecting China University of Petroleum North-west Division of Exploration and Production Research Institute CNPC Huabei Division of China Petroleum Logging Corporation

We present a path morphology method to separate total rock pore space into matrix, fractures and vugs and derive their pore structure spectrum. Thus, we can achieve fine pore evaluation in fracture–vug reservoirs based on electric imaging logging data. We automatically identify and extract fracture–vug information from the electric imaging images by adopting a path morphological operator that remains flexible enough to fit rectilinear and slightly curved structures because they are independent of the structuring element shape. The Otsu method was used to extract fracture–vug information from the background noise caused by the matrix. To accommodate the differences in scale and form of the different target regions,including fracture and vug path, operators with different lengths were selected for their recognition and extraction at the corresponding scale. Polynomial and elliptic functions are used to fit the extracted fractures and vugs, respectively, and the fracture–vug parameters are deduced from the fitted edge. Finally, test examples of numerical simulation data and several measured well data have been provided for the verification of the effectiveness and adaptability of the path morphology method in the application of electric imaging logging data processing. This also provides algorithm support for the fine evaluation of fracture–vug reservoirs.

关键词： Path morphology Image automatic identification Electric imaging logging Fracture–vug reservoir

Research and Application of Excitation Method Optimization in Areas with Low Signal-to-Noise Ratio of Seismic Data

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Journal of World Architecture 2023年第5期7卷 29-36页

作者： Dawei Yang Jilin geophysical prospecting and Surveying company Changchun 130031Jilin ProvinceChina

In areas with a low signal-to-noise ratio of seismic data,the continuity of the seismic reflection waves in the exploration target layer is very poor,which will reduce the imaging accuracy and make it impossible to solve certain geological *** article suggests an approach to address the issue of seismic acquisition by optimizing excitation *** involves conducting a detailed investigation of the surface structure,enhancing the observation system,increasing the coverage appropriately,and transitioning from combined-well excitation to single-well ***,the use of technical tools like qualitative evaluation of the observation system and forward modeling are employed to determine the final optimized seismic acquisition *** effectiveness of this approach is evident from the seismic profile obtained in an exploration area in Inner Mongolia.

关键词： Optimization Single-well excitation Combined-well excitation Coverage times Forward illumination

Application of the L-M optimized algorithm to predicting blast vibration parameters

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Earthquake Science 2008年第5期21卷 542-547+554页

作者：张艺峰姚道平谢志招杨江峰叶友权 Xiamen Seismic Survey Research Center Institute of geophysical prospecting SINOPEC Research Institute of Petroleum Exploration and Development

Currently,the regression empirical formula with vibration peak as the safety index of single blasting vibration is widely applied in blasting engineering circles throughout the *** to complex blasting mechanism

关键词： blasting vibration neural network L-M algorithm prediction

Integrated Reservoir Prediction and Oil-Gas Evaluation in the Maoshan Area

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Acta Geologica Sinica(English Edition) 2000年第3期74卷 697-700页

作者： HAO Peidong CUI Xiuqin No.6 geophysical prospecting Party East China Petroleum BureauChina National Star Petroleum CorporationNanjing 210007

The Maoshan area is an area with well-developed igneous rocks and complex structures. The thickness of the reservoirs is generally small. The study of the reservoirs is based on seismic data, logging data and geological data. Using techniques and software such as Voxelgeo, BCI, RM, DFM and AP, the authors have made a comprehensive analysis of the lateral variation of reservoir parameters in the Upper Shazu bed of the third member of the Palaeogene Funing Formation, and compiled the thickness map of the Shazu bed. Also, with the data from ANN, BCI and the abstracting method for seismic characteristic parameters in combination with the structural factors, the authors have tried the multi-parameter and multi-method prediction of petroleum, delineated the potential oil and gas areas and proposed two well sites. The prediction of oil and gas for Well JB2 turns out to be quite successful.

关键词： integrated reservoir prediction oil and gas evaluation Maoshan area Northern Jiangsu basin

Analysis of the ambiguity of log-constrained seismic impedance inversion

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Petroleum Science 2011年第2期8卷 151-156页

作者： Li Guofa Li Hao Ma Yanyan Xiong Jinliang State Key Laboratory of Petroleum Resources and prospecting China University of Petroleum (Beijing) Beijing 102249 China Key Laboratory of geophysical prospecting China National Petroleum Corporation Beijing 102249 China Dagang Oil field PetroChina Tianjin 300280 China

Although the ambiguity of seismic inversion is widely recognized in both theory and practice, so far as a concrete inversion example is concerned, there is not any objective, controllable method or any standard for how to evaluate and determine its ambiguity and reliability, especially for the high frequency components beyond the effective seismic frequency band. Taking log-constrained impedance inversion as an example, a new appraisal method is proposed on the basis of analyzing a simple geological model. Firstly, the inverted impedance model is transformed to a reflection coefficient series. Secondly, the maximum effective frequency of the real seismic data is chosen as a cutoff point and the reflection coefficient series is decomposed into two components by low-pass and high-pass filters. Thirdly, the geometrical reflection characteristics of the high-frequency components and that of the real seismic data are compared and analyzed. Then, the reliability of the inverted impedance model is appraised according to the similarity of geometrical characteristics between the high-frequency components and the real seismic data. The new method avoids some subjectivity in appraising the inverted result, and helps to enhance the reliability of reservoir prediction by impedance inversion technology.

关键词： Log-constrained impedance reflection coefficients seismic inversion ambiguity

A-E equation of potential field transformations in the wavenumber domain and its application

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Applied Geophysics 2009年第3期6卷 205-216,299页

作者： Chai Yupu Bureau of geophysical prospecting CNPC Zhuozhou 072751 China

A shift sampling theory established by author （1997a） is a generalization of Fourier transform computation theory. Based on this theory, I develop an Algorithm-Error （A-E） equation of potential field transformations in the wavenumber domain, which not only gives a more flexible algorithm of potential field transformations, but also reveals the law of error of potential field transformations in the wavenumber domain. The DFT0η η（0.5, 0.5） reduction-to-pole （RTP） technique derived from the A-E equation significantly improves the resolution and accuracy of RTP anomalies at low magnetic latitudes, including the magnetic equator. The law （origin, form mechanism, and essential properties） of the edge oscillation revealed by the A-E equation points out theoretically a way of improving the effect of existing padding methods in high-pass transformations in the wavenumber domain.

关键词： Potential field transformation Fourier transform shift sampling theory A-E equation DFT0η η(0.5 0.5) algorithm