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Sequence architecture and sedimentary characteristics of a Middle Jurassic incised valley,western Sichuan depression,China

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Petroleum Science 2018年第2期15卷 230-251页

作者： Jun-Long Liu Wei Yin You-Liang Ji Tian-Yun Wang Fu-Xiang Huang Hai-Yue Yu Wen-Shu Li Sinopec Exploration&Production Research Institute Beijing 100083China State Key Laboratory of Petroleum Resources and Prospecting China University of PetroleumBeijing 102249China Xinxing geophysical Department Bureau of Geophysical ProspectingCNPCZhuozhou 072751HebeiChina Daqing Oil company CNPCDaqing 163000HeilongjiangChina

The Middle Jurassic Shaximiao Formation encompasses tens of meters of thick lowstand meandering valley （LMV） strata in the western Sichuan foreland basin. Ancient LMVs newly discovered in this area were further studied based on sequence stratigraphy and seismic sedimentology. The aim of the present study was to investigate the sedimentary characteristics, sequence architecture, and the controls on LMV deposition in this tectonically active basin using field survey data, seismic sections, seismic amplitude imaging, core description, and comprehensive application of drilling data. The results show the following：（1） Three regional sequence boundaries and two flooding surfaces were recognized, and the Shaximiao For- mation was divided into two-third-order sequences and four systems tracts. （2） Three sedimentary facies associations were identified： incised valley-fill, tributary channel, and overbank facies. Incised valleys are 5-17 km wide, 20-60 m deep and traceable for 120 km along their axes. （3） In the downstream segment, the role of tectonism gradually diminishes, and periodic base-level changes control the form and evolution of the incised valleys. Three types of LMVs--AI, A2, and A3--developed with changes in base level （lake level）; of these types, the base level of the A3 LMV was likely the lowest.

关键词： Sequence architecture Sedimentary characteristic Lowstand meandering valley Western Sichuandepression Shaximiao Formation

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Genetic mechanism and development of the unsteady Sarvak play of the Azadegan oil field,southwest of Iran

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Petroleum Science 2016年第1期13卷 34-51页

作者： Yang Du Jie Chen Yi Cui Jun Xin Juan Wang Yi-Zhen Li Xiao Fu School of Geoscience and Technology Southwest Petroleum University Geology and Exploration Research Institute CNPC Chuanqing Drilling Engineering Company Limited Iraq Branch company of CNODC CNPC

The upper Cretaceous Sarvak reservoir in the Azadegan oil field of southwest Iran has its oil–water contact nearly horizontal from the north to the center and dips steeply from the center to the *** purpose of this paper is to interpret this abnormal reservoir feature by examining the accumulation elements,characteristics,and evolution based on the 3D seismic,coring,and well logging ***,in the field,the Sarvak reservoir is massive and vertically heterogeneous,and impermeable interlayers are *** distribution of petrophysical properties is mainly dominated by the depositional paleogeomorphology and degrades from north to south *** source is the lower Cretaceous Kazhdumi Formation of the eastern Dezful sag,and the seal is the muddy dense limestone of the Cenozoic Gurpi and Pebdeh *** with the trap evolution,the accumulation evolution can be summarized as follows： the Sarvak play became a paleo-anticlinal trap in the Alpine tectonic activity after the late Cretaceous（96 Ma） and then was relatively peaceful in the later long geologic *** Kazhdumi Formation entered in the oil window at the early Miocene（12–10 Ma） and charged the Sarvak bed,thus forming the *** by the ZagrosOrogeny,the paleo-reservoir trap experienced a strong secondary deformation in the late Pliocene（4 Ma）,which shows as the paleo-trap shrank dramatically and the prelow southern area uplifted and formed a new secondary anticline trap,hence evolving to the current two structural highs with the south point（secondary trap） higher than the north（paleo-trap）.The trap deformation broke the paleoreservoir kinetic equilibrium and caused the secondary reservoir *** upper seal prevented vertical oil dissipation,and thus,the migration is mainly in interior Sarvak bed from northern paleo-reservoir to the southern secondary *** strong reservoir heterogeneity and the degradation trend of reservoir properties along migration pat

关键词： reservoir southwest Cretaceous migration geologic tectonic unsteady limestone depositional sandstone

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Fault characteristics and their control on oil and gas accumulation in the southwestern Ordos Basin

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Energy Geoscience 2024年第1期5卷 162-171页

作者： Yongtao Liu Shuanghe Dai Yijun Zhou Fufeng Ding Mingjie Li Xingyun Li Yu Zhao Binhua Guo Tong Li Junan Han Research Institute of Oriental geophysical company CNPCXi'an710021China State Key Laboratory of Continental Dynamics Northwest UniversityXi'an710069China Exploration Department of PetroChina Changqing Oilfield company Xi'an710018China

3D seismic data recently acquired from the Ordos Basin shows three sets of regularly distributed fault systems,which overrides previous understanding that no faults were developed in this *** interpretation suggests that the faults in the southwestern Ordos Basin have three basic characteristics,namely extreme micro-scale,distinct vertical stratification,and regularity of planar *** NS-,NW-,and NE-trending fault systems developed in the Meso-Neoproterozoic e Lower Ordovician *** these,the NS-trending fault system mainly consists of consequent and antithetic faults which show clear syndepositional *** fault systems in the Carboniferous e Middle-Lower Triassic strata are not clear on seismic reflection *** NW-and NE-trending fault systems are developed in the Upper Triassic e Middle Jurassic *** these,the NW-trending fault system appears as a negative flower structure in sectional view and in an en echelon pattern in plan-view;they show transtensional deformation.A NE-trending fault system that developed in the Lower Cretaceous e Cenozoic strata shows a Y-shaped structural style and tension-shear properties.A comprehensive analysis of the regional stress fields at different geologic times is essential to determine the development,distribution direction,and intensity of the activity of fault systems in the Ordos *** exploration suggests three aspects in which the faults within the Ordos Basin are crucial to oil and gas ***,these faults serve as vertical barriers that cause the formation of two sets of relatively independent petroleum systems in the Paleozoic and Mesozoic strata respectively;this is the basis for the‘upper oil and lower gas’distribution ***,the vertical communication of these faults is favorable for oil and gas migration,thus contributing to the typical characteristics of multiple oil and gas fields within the basin,*** and gas reservoirs with multiple

关键词： Coherent attribute Strike-slip fault Flower structure Shale oil Ordos basin

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Using High-Precision Remote Information for Auxiliary Design of Geophone Point

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石油地球物理勘探 2009年第1期44卷 1-8页

作者： Zhang You-yan Lei Ying-chun Ye Yong Hu Yan Luo Lun-cai Research Institute of Petroleum Exploration&Development CNPC Beijing 100083 China geophysical Prospecting company CNPC Chuanqing Drilling Engineering Company Limited Chengdu Sichuan Province610213 China

利用高精度遥感数据(分辨率已达亚米级)提取相关信息评价检波器组合、选择有利检波器埋置位置,既可在观测系统设计阶段用于评估采集设计方案能否实施及辅助选择适当检波器组合图形,也可在外业测量前逐点优选检波器组合中心点,从而达到... 详细信息

利用高精度遥感数据(分辨率已达亚米级)提取相关信息评价检波器组合、选择有利检波器埋置位置,既可在观测系统设计阶段用于评估采集设计方案能否实施及辅助选择适当检波器组合图形,也可在外业测量前逐点优选检波器组合中心点,从而达到改善接收条件、提高观测系统的可实施性及保证地震资料采集质量的目的.利用高精度遥感数据提取相关信忠评价影响检波器接收信号质量的因素,所对应的遥感信忠主要用于三个方面的评估:①利用DEM(数字高程模型)与坡度计算检波器组合图形内的平整度与展开能力(组合展开度);②利用检波器组合区域的组内高差、坡度、湿度、地表松散度评价耦合条件的优劣程度(组合优度);③利用综合高精度正射影像与DEM提取的相关信忠划定工区内需要避让的地段及不符合HSE规范的施工禁区(可实施性).实例分析表明,通过遥感影像选择检波器组合与检波器埋置中心,提高了检波器组合内埋置点的平整度与组合展开度,对减轻野外劳动强度,提高劳动生产率,节约成本都起到了重要作用.

关键词：地震检波器远程数据高精度辅助设计信息点检波器组合扩大生产能力相关信息

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Pure S-waves in land P-wave source VSP data

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Applied Geophysics 2007年第3期4卷 173-182页

作者： Liu Yang Zhang Qinghong Bao Leiying Wei Xiucheng Key Laboratory of geophysical Exploration of cnpc China University of Petroleum Beijing 102249 China Borehole Seismic Center East Geophysical Company of CNPC Zhuozhou Zhuozhou 072751 China Exploration and Production Research Institute of SINOPEC Beijing 100083 China

Conventional land vertical seismic profiling （VSP） exploration usually uses P-wave sources and three-component geophones for receivers, emphasizing P- and converted S-waves. Previous studies show that both dynamite borehole shots and vertical vibrations from controllable seismic sources at the surface will produce relatively strong pure P-waves and weaker pure S-waves. Interfaces with a large Poisson＇s ratio difference have a positive influence on the formation of strong transmitted converted S-waves. By a comparative analysis of pure S-waves from sources and converted downgoing S-waves, we believe that the main frequency of pure S-waves is usually lower than pure P-waves while the main frequency of downgoing converted S-waves is close to that of P-waves. We have studied zero-offset and offset VSP data from land P-wave sources. Results show that pure S-waves commonly exist in these data with differences in wave intensity. S-wave velocity can be obtained from the P-wave source zero-offset VSP data. Finally, we discuss the bright future of joint application of VSP P-and S-waves and the full use of S-waves in P-wave source VSP data.

关键词： Land VSP P-wave source pure S-wave

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The Goos-Hnchen shift of wide-angle seismic reflection wave

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Science China Earth Sciences 2012年第5期55卷 852-857页

作者： LIU FuPing MENG XianJun XIAO JiaQi WANG AnLing YANG ChangChun Beijing Institute of Graphic Communication Beijing 102600China Institute of Geology and Geophysics Chinese Academy of SciencesBeijing 100029China Shengli geophysical Research Institute of China Petrochemical Corporation(SINOPEC) Dongying 257022China cnpc Greatwall Drilling company BeOing 100176China

The partial derivative equations of Zoeppritz equations are established and the derivatives of each matrix entry with respect to wave vectors are derived in this *** solving the partial derivative equations we obtained the partial derivatives of seismic wave reflection coefficients with respect to wave vectors,and computed the Goos-Hnchen shift for reflected P-and *** plotting the curves of Goos-Hnchen shift,we gained some new insight into the lateral shift of seismic reflection *** lateral shifts are very large for glancing wave or the wave of the incidence angle near the critical angle,meaning that the seismic wave propagates a long distance along the reflection interface before returning to the first *** the reflection waves of incidence angles away from the critical angle,the lateral shift is in the same order of magnitude as the *** lateral shift varies significantly with different reflection *** example,the reflected P-wave has a negative shift at the reflection interface between mudstone and *** reflected VS-wave has a large lateral shift at or near the critical *** lateral shift of the reflected VS-wave tends to be zero when the incidence angle approaches 90°.These observations suggest that Goos-Hnchen effect has a great influence on the reflection wave of *** correction for the error caused by Goos-Hnchen effect,therefore,should be made before seismic data processing,such as the depth migration and the normal-moveout *** the theoretical foundation established in this paper,we can further study the correction of Goos-Hnchen effect for the reflection wave of large incidence angle.

关键词： Goos-Hnchen effect lateral shift P-and SV-wave reflection wave of wide-angle Zoeppritz equations critical angle

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GLCM Parameters in Channel Texture Attribute Analysis

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石油地球物理勘探 2012年第A2期47卷 90-97页

作者： Wang Zhiguo Yi Cheng Lei Xiaolan Gu Faming Wu Xiaohua Institute of Resources and Environmental Southwest Petroleum University Chengdu Sichuan 610500China Second Gas Production Factory of Changqing Oilfield company Xi' an Shaanxi 710200 China Changqing Branch of geophysical Research Institute BGP Inc. Xi'an Shaanxi 710021 China geophysical Prospecting company CNPC Chuanqing Drilling Engineering Company Limited Chengdu Sichuan 610213 China

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Provenance and paleogeography of Carboniferous-Permian strata in the Bayanhot Basin:Constraints from sedimentary records and detrital zircon geochronology

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Geoscience Frontiers 2021年第3期12卷 113-131页

作者： Junfeng Zhao Yijun Zhou KeWang Xuan Li Zhanrong Ma Zhengzhong Ruan DongWang Rui Xue State Key Laboratory of Continental Dynamics Department of GeologyNorthwest UniversityXi'an710069China Changqing Branch of geophysical Research Institute BGPCNPCXi'an 710021China Exploration and Development Research Institute Changqing Oilfield Company of PetroChinaXi'an 710021China Twelfth Oil Production Plant Changqing Oil Field Company of PetroChinaHeshui 745400China

The Bayanhot Basin is a superimposed basin that experienced multiple-staged tectonic movements;it is in the eastern Alxa Block,adjacent to the North China Craton(NCC)and the North Qilian Orogenic Belt(NQOB).There are well-developed Paleozoic-Cenozoic strata in this basin,and these provide a crucial window to a greater understanding of the amalgamation process and source-to-sink relationships between the Alxa Block and surrounding tectonic ***,due to intensive post-depositional modification,and lack of subsurface data,several fundamental issues-including the distribution and evolution of the depositional systems,provenance supplies and source-to-sink relationships during the Carboniferous-Permian remain unclear and thus hinder hydrocarbon exploration and limit the geological understanding of this *** integrated outcrop surveys,new drilling data,and detrital zircon dating,this study examines the paleogeographic distribution and evolution,and provenance characteristics of the Carboniferous-Permian strata in the Bayanhot *** results show that the Bayanhot Basin experienced a long-term depositional evolution process from transgression to retrogression during the Carboniferous-late *** transgression extent could reach the central basin in the early *** maximum regional transgression occurred in the early Permian and might connect the Qilian and North China seas with each ***,a gradual regression followed until the end of the *** northwestern NCC appeared as a paleo-uplift area and served as a sediments provenance area for the Alxa Block at that *** NCC,Bayanwula Mountain,and NQOB jointly served as major provenances during the *** was no ocean separation,nor was there an orogenic belt between the Alxa Block and the NCC that provided sediments for both sides during the *** accretion of the Alxa and North China blocks should have been completed before t

关键词： Carboniferous-Permian Detrital zircon geochronology Paleogeography Bayanhot Basin Alxa Block North China Craton

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The application of elastic impedance inversion in reservoir prediction at the Jinan area of Tarim Oilfield

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Applied Geophysics 2007年第3期4卷 201-206页

作者： Yang Jinhua Li Guofa Liu Yang Jiang Weidong School of Earth and Space Sciences Peking University Beijing 100871 China Key Laboratory of geophysical Exploration of cnpc China University of Petroleum Beijing 102249 China East geophysical company Zhuozhou 072751 China

The Triassic reservoir in the Jinan area of Tarim Oilfield consists largely of interbedded sand and shale. Because of the large overlap between sandstone and shale impedance, it is difficult to distinguish sandstone from shale by acoustic impedance alone. Compared to acoustic impedance, elastic impedance contains more lithologic and physical information of the reservoir. Based on meticulous well-tie calibration, elastic impedance data volumes for 10°, 20°, and 30° emergence angles are obtained using pre-stack elastic impedance inversion. A non-linear statistical relationship between elastic impedance and shale content is set up by a PNN neural network. The non-linear mapping relationship is used to predict the reservoir shale content from elastic impedance, which will depict and predict the reservoir oil-bearing sands.

关键词： Acoustic impedance elastic impedance shale content PNN neural network non-linear relationship

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Local stress field inverted for a shale gas play based on focal mechanisms determined from the joint source scanning algorithm

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Earthquake Science 2021年第3期34卷 222-233页

作者： Chuntao Liang Yangyang Yu Furong Wu Liang Kang Jian Tang Key Laboratory of Earth Exploration and Information Technology of Ministry of Education Chengdu University of TechnologyChengdu 610059China State Key Laboratory of Geohazard Prevention and Geoenviroment Protection Chengdu University of TechnologyChengdu 610059China Sichuan Earthquake Agency Chendu 610059China cnpc eastern geophysical company Chengdu 610059China

The joint source scanning algorithm(SSA)scans locations and focal mechanisms of microseismic events *** to the traditional source scanning algorithm,it yields much more events with extra information of focal *** availability of more events and focal mechanisms make it possible to invert for a 2D gridded stress *** a byproduct of hydrofracturing monitoring,the method offers a new way to extract stress field as a substitute to other more expensive *** method is applied to a hydraulic fracturing dataset collected from one shale gas production field in the southeast of the Sichuan basin.A damped stress inversion is conducted to obtain a 2D stress *** hydraulic-fracturing induced fractures can be determined from the *** events associated with these fractures generally have relatively low stacked energy and are limited to the depth of horizontal *** existing fault(possibly associated with the axis of the central Sichuan uplift)is also determined and the events associated with the existing fault generally have higher stacked energy and are more densely *** existing fault may also serve as a structural boundary where the rocks to the NW side are easier to be fractured while events on the other side are sparse with low stacked *** existing fault also divides the stress field into two regimes:the maximum compressional stress field to the NW and SE of the fault line are dominantly in NW-SE and N-S directions,respectively.

关键词： microseismics stress focal mechanism hydraulic fracturing

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