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Sedimentary filling characteristics and controlling factors of lacustrine microbial carbonates sequence in the Santos Basin,Brazil

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Petroleum Exploration and Development 2022年第4期49卷 785-796页

作者： HE Sai LI Guorong WU Changrong LIU Shugen ZHANG Zhongmin SU Yushan ZHU Yixuan HE Zhao REN Jie WANG Yuchen ZHOU Wei WANG Yajie College of Energy Chengdu University of TechnologyChengdu 610059China State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Chengdu University of TechnologyChengdu 610059China sichuan zhongcheng institute of coalfield geophysical engineering Chengdu 610072China Sinopec Research institute of Petroleum Exploration&Production Beijing 100083China

Based on comprehensive analysis of seismic,logging,core,thin section data,and stable isotopic compositions of carbon and oxygen,the sedimentary filling characteristics of the Lower Cretaceous Barra Velha Formation sequence in H oil field,Santos Basin,are studied,and the high-frequency sequence stratigraphic framework is established,and the spatial distribution of reef-shoal bodies are predicted and the controlling factors are *** the depositional period of the Barra Velha Formation,the study area is a slope-isolated platform-slope sedimentary pattern from southwest to northeast and the change of climate background from rift to depression periods has resulted in the variation of sedimentary characteristics from the lower third-order sequence SQ1(BVE 300 Member)of low-energy deep water to the upper third-order sequence SQ2(BVE 200 and 100 members)of high-energy shallow water in the Barra Velha *** activities of extensional faults and strike-slip faults in rift period and the sedimentary differentiation from platform margin to intra-platform in depression period made the sedimentary paleogeomorphology in these two periods show features of“three ridges and two depressions”.The reef-shoal bodies mainly developed in the SQ2-LHST period,with vertical development positions restricted by the periodic oscillation of the lake level,and developed on the top of each high-frequency sequence stratigraphic unit in SQ2-LHST in the *** strike-slip fault activity controlled the distribution of the reef-shoal bodies on the plane by changing the sedimentary *** positive flower-shaped strike-slip faults made the formation of local highlands at the margins of and inside the shallow water platforms and which became high-energy sedimentary zones,creating conditions for the development of reef-shoal bodies.

关键词： Santos Basin,Brazil Lower Cretaceous Barra Velha Formation lacustrine microbial carbonate high-frequency sequence sedimentary filling characteristics reef-shoal body development model

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A microscopic ancient river channel identification method based on maximum entropy principle and Wigner-Ville Distribution and its application

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Petroleum Exploration and Development 2021年第6期48卷 1354-1366页

作者： XU Tianji CHENG Bingjie NIU Shuangchen QIN Zhengye WANG Zhenzhen School of Resources and Environment University of Electronic Science and Technology of ChinaChengdu 611731China Yangtze Delta Region institute of University of Electronic Science and Technology of China Huzhou 313000China State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Chengdu University of TechnologyChengdu 610059China College of Geophysics Chengdu University of TechnologyChengdu 610059China sichuan zhongcheng institute of coalfield geophysical engineering Chengdu 610072China.

In view of the problem of fine characterization of narrow and thin channels,the maximum entropy criterion is used to enhance the focusing characteristics of Wigner-Ville *** the basis of effectively improving the time-frequency resolution of seismic signal,a new method of microscopic ancient river channel identification is *** on the principle of the equivalence between the maximum entropy power spectrum and the AR model power spectrum,the prediction error and the autoregression coefficient of AR model are obtained using the Burg algorithm and Levinson-Durbin recurrence *** the condition of the first derivative of autocorrelation function being 0,the Wigner-Ville Distribution of seismic signal is calculated,and the Wigner-Ville Distribution time-frequency power spectrum(MEWVD)is obtained under the maxi-mum entropy criterion of the microscopic ancient river *** analysis of emulational seismic signal and forward numerical simulation signal of narrow thin model,it is found that MEWVD can effectively avoid the interference of cross term of Wigner-Ville Distribution,and obtain more accurate spectral characteristics than STFT and CWT signal analysis *** is also proved that the narrow and thin river channels of different scales can be identified effectively by MEWVD of different *** method is applied to the third member of Jurassic Shaximiao Formation(J2s33-2)gas reservoir of the Zhongji-ang gas field in sichuan *** spatial information of width and direction of narrow and thin river channels with width less than 500 m and sandstone thickness less than 35 m is accurately identified,providing bases for well deployment and horizontal well fracturing section selection.

关键词： maximum entropy principle Wigner-Ville Distribution spectral focusing high resolution seismic fluvial facies narrow and thin ancient channel

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Crust and Upper Mantle Electrical Resistivity Structure in the Panxi Region of the Eastern Tibetan Plateau and Its Significance

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Acta Geologica Sinica(English Edition) 2015年第2期89卷 531-541页

作者： ZHANG Gang WANG Xuben FANG Hui GUO Ziming ZHANG Zhaobin LUO Wei CAI Xuelin LI Jun LI Zhong WU Xing State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Chengdu University of Technology Key Laboratory of Earth Exploration & Information Techniques of Ministry of Education institute of geophysical and Geochemical Exploration CAGS sichuan Shutong Geotechnical engineering Company institute of Geological Survey of Yunnan Geological Survey

The Panxi region is located in the frontal zone of positive squeezing subduction and side squeezing shearing between the Indian plate and the Eurasian plate. The long-period magnetotelluric （LMT） and broadband magnetotelluric （MT） techniques are both used to study the deep electrical conductivity structure in this region; magnetic and gravity surveys are also performed along the profile. According to the 2-D resistivity model along the Yanyuan-Yongshan profile, a high- conductivity layer （HCL） exists widely in the crust, and a high-resistivity block （HRB） exists widely in the upper mantle in general, as seen by the fact that a large HCL exists from the western Jinpingshan tectonic zone to the eastern Mabian tectonic zone in the crust, while the HRB found in the Panxi tectonic zone is of abnormally high resistivity in that background compared to both sides of Panxi tectonic zone. In addition, the gravity and magnetic field anomalies are of high value. Combined with geological data, the results indicate that there probably exists basic or ultrabasic rock with a large thickness in the lithosphere in the Panxi axial region, which indicates that fracture activity once occurred in the lithosphere. As a result, we can infer that the high-resistivity zone in the Panxi lithosphere is the eruption channel for Permian Emeishan basalt and the accumulation channel for basic and ultrabasic rock. The seismic sources along the profile are counted according to seismic record data. The results indicate that the most violent earthquake sources are located at the binding site of the HRB and the HCL, where the tectonic activity zone is generally acknowledged to be; however, the earthquakes occurring in the HCL are not so violent, which reflects the fact that the HCL is a plastic layer, and the fracture threshold of a plastic layer is low generally, making high stress difficult to accumulate but easy to release in the layer. As a result, a higher number of smaller earthquakes occurred in

关键词： Earthquake deep electrical resistivity structure long-peroid magnetotelluric Emeishanbasalt Panxi region

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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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Effect of microscopic pore structures on ultrasonic velocity in tight sandstone with different fluid saturation

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Petroleum Science 2022年第6期19卷 2683-2694页

作者： Jian-Yong Xie Jun-Jie Zhang Wei Xiang Yan-Ping Fang Ya-Juan Xue Jun-Xing Cao Ren-Fei Tian State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Chengdu University of Technology(CDUT)Geophysical InstituteChengduSichuan610059China Oilfield Technology Division China National Offshore Oilfield Services Co.ZhanjiangGuangdong524000China School of Communication engineering Chengdu University of Information TechnologyChengduSichuan610225China State Key Laboratory of Natural Gas Hydrate Beijing100028China

Microcosmic details of pore structure are the essential factors affecting the elastic properties of tight sandstone reservoirs,while the relationships in between are still incompletely clear due to the fact that quantitative or semi-quantitative experiments are hard to ***,three sets of tight sandstone samples from the Junggar Basin are selected elaborately based on casting thin sections,XRD detection,and petro-physical measurement,and each set is characterized by a single varied microcosmic factor(pore connectedness,pore type,and grain size)of the pore *** ultrasonic pulse transmission technique is conducted to study the response of elastic properties to the varied microcosmic details of pore structure in the situation of different pore fluid(gas,brine,and oil)saturation and confining *** show samples with less connectedness,inter-granular dominant pores,and smaller grain size showed greater velocities in normal *** more sensitive to the variations of pore type,while Vsis more sensitive to the variations of grain *** with better connectedness at fluid saturation(oil or brine)show greater sensitivity to the confining pressure than those with gas saturation with a growth rate of 6.9%-11.9%,and the sensitivity is more likely controlled by *** pore types(inter-granular or intra-granular)can be distinguished by the sensitivity of velocities to the variation of pore fluid at high confining pressure(>60 MPa).The samples with small grain sizes tend to be more sensitive to the variations of confining *** this knowledge,we can semi-quantitatively distinguish the complex pore structures with different fluids by the variation of elastic properties,which can help improve the precision of seismic reservoir prediction for tight sandstone reservoirs.

关键词： Tight sandstone Pore structure Casting thin section Ultrasonic measurement

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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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Distribution of wetlands and salt lakes in the Yadong region of Tibet based on remote sensing, and their geo-climatic environmental changes

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China Geology 2022年第4期5卷 637-648页

作者： Ang Sun Qing-hua Yang Zhi Liu Hua Chen Lei Han Shou-min Jiang Yue-yue Meng Yu Bian Yong-peng Yang China Aero geophysical Survey and Remote Sensing Center for Natural Resources China Geological SurveyBeijing 100083China sichuan Geological Survey institute Chengdu 610036China

Based on the 16 scenes GF-1 satellite multi-spectral remote sensing images,through the adoption of data processing methods including orthorectification,geometric rectification,data fusion and image mosaic,integrated with field surveys,the remote sensing interpretation signs for the inland wetland types have been built,and the remote sensing survey of inland wetlands in Yadong region has been initiated,with six types of inland wetlands recognized in Yadong region,namely permanent rivers,seasonal rivers,lakes,salt lakes,alpine meadows,and inundated *** spatial distribution characteristics and the spreading rules of these wetlands have also been *** on full understanding of the overall characteristics of the inland wetlands in the Yadong region,using the three phases of TM images acquired in 1989,2003 and 2008 as well as the PMS2 data gathered by GF-1 in 2014,and the wide-range data(WFV3)gathered by GF-1 in *** to the typical salt lakes,a long-time salt lakes transition study was carried *** results show that the typical salt lakes in Yadong have been shrinking in the past three *** average annual shrinkage of Duoqing Co(Co means lake in Tibetan)was stronger than that of Gala Co,which are respective 87.30 hectares(usually short as ha;1 ha equals to 0.01 km^(2))/a and 24.20 ha/a;the shrinkage degree of Gala Co was higher than that of Duoqing Co,shrank by 59.27% and 35.73% *** on the remote sensing survey results and an integrated analysis of the predecessors’researchers,the reason for the shrinkage of the salt lakes is more inclined to geological *** process is manifested by a series of extensional faults at the bottom of the lake basin generated from tectonic activities,providing fluid infiltration channels,and inducing the eventual leakage of lake water to the lower *** result provides an important instance for understanding the evolution characteristics of wetlands and salt lakes in specific environ

关键词： Yadong Wetlands Salt lakes Duoqing Co Gala Co Geological survey engineering Tibet Plateau

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Characteristics of discontinuities in Heifangtai landslide area in Gansu,China

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Applied Geophysics 2020年第5期17卷 857-869,904,905页

作者： Li Bin Xu Qiang Cheng Qiang Liu Tian-Xiang Tang Ming-Gao Zheng Guang Wang Hai-Yan Chengdu University of Technology State Key Laboratory of Geohazard Prevention and Geoenvironment ProtectionSichuanChengdu 610059China sichuan Highway Planning SurveyDesign and Research Institute Ltd.SichuanChengdu 610041China

Loesses are widely distributed all over the world,especially in ***,long-term agricultural irrigation and extreme climate changes have led to frequent geological disasters in the Heifangtai area of Lanzhou,Gansu,*** these,landslides are one of the most frequent types of disasters that are harmful to humans and the environment.A landslide is closely related to the lithology,structure,and groundwater of the site and consists of a combination of structure units divided by discontinuities,such as faults,joints,and fi ***,geological surveys,engineering drilling,and trenching are typically used to identify the stratum lithology,structure,and groundwater in order to visually display underground information within a limited depth ***,these methods have *** particular,geological surveys can only describe geological phenomena on the surface,while the cost of drilling and trenching may be high,along with the ineffi ciency of *** this research,the integrated geophysical exploration method was used to analyze the hidden joints,cracks,and other discontinuities and geophysical features of the *** results were verified by trench exploration,and large amounts of underground information were obtained,especially the spread and distribution of discontinuities in landslide *** information can be effectively used for carrying out and providing meaningful experiences and lessons in future comprehensive geophysical processing and interpretations related to the prediction and evaluation of landslides.

关键词： Loess landslide discontinuities geophysics engineering geology

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A Strength Softening Phase Transition Observed in Shocked （Mg0.92,Fe0.08）SiO3 Perovskite at About 83 GPa

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Chinese Physics Letters 2008年第1期25卷 332-335页

作者：何林龚自正经福谦 institute of High Pressure Physics Southwest Jiaotong University Chengdu 610031 College of Physics and Electronic engineering Sichuan Normal University Chengdu 610066 Laboratory for Shock Wave and Detonation Physics Research Institute of Fluid Physics China Academy of Engineering Physics PO Box 919-111 Mianyang 621900

We report the experimental data of Hugoniot longitudinal sound velocity VL for natural （Mg0.92,Fe0.08）SiO3 enstatite sample at about 40-140 GPa, consisting of three new data and five previously reported data but revised by our new Hugoniot equation of state parameters. Three segments, separated by two discontinuities, appear in the VL-PH （shock pressure） plot. Analyses show that the first discontinuity at about 64 GPa, with a sharp increase of VL of about 21%, is judged to be a phase transition from enstatite to Pbnm perovskite （PV）; while the second one at about 83 GPa, with a dramatic decrease of VL of about 23%, is likely caused by a subtle structural change from Pbnm PV to tetragonal PV, accompanied by material strength softening due to melting of oxygen sublattices. This strength softening evidence is obtained first from shock wave experiments, and probably has profound implications for probing into the origin of low seismic velocity anomaly in the Earth＇s lower mantle and thus constraining the geophysical and geochemical models for the Earth＇s lower mantle.

关键词： pulsars x-ray spectra relativity and gravitation redshift

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In-situ construction of Co(OH)_(2) nanoparticles decorated biochar for highly efficient degradation of tetracycline hydrochloride via peracetic acid activation

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Chinese Chemical Letters 2023年第9期34卷 264-269页

作者： Fengbin Sun Xudong Yang Feng Shao Fan Li Zhicheng Pan Lin Qiao Ziniu Xiao Wen Liu institute of Urban Meteorology China Meteorological AdministrationBeijing 100089China State Key Laboratory of Numerical Modeling for Atmospheric Sciences and geophysical Fluid Dynamics Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China The Key Laboratory of Water and Sediment Sciences Ministry of EducationCollege of Environmental Sciences and EngineeringPeking UniversityBeijing 100871China College of Landscape Architecture Zhejiang Agriculture and Forestry UniversityHangzhou 311300China Water Safety and Water Pollution Control engineering Technology Research Center in sichuan Province Haitian Water GroupChengdu 610299China

Peracetic acid(CH_(3)C(O)OOH,PAA)-based heterogeneous advanced oxidation process(AOP)has attacked intensive interests due to production of various reactive ***,Co(OH)_(2)nanoparticles decorated biochar(Co(OH)_(2)/BC)was fabricated by a simple and controllable method,which was used to degrade tetracycline hydrochloride(TTCH)in water through PAA *** results indicated that 100%TTCH(C_(0)=10μmol/L)degradation efficiency was realized within 7 min at pH 7,with a high kinetic rate constant(k_(1))of 0.64 min^(-1)by the optimized Co(OH)_(2)/*** characterizations suggested that Co(OH)_(2)nanoparticle was successfully decorated on biochar,leading to more active sites and electronic structure alteration of biochar,thus greatly promoting the catalytic cleavage of PAA for radicals ***,the reactive oxygen species(ROS)quenching experiments and electron paramagnetic resonance(EPR)analysis demonstrated the key species were alkoxyl radicals(R–O^(·),mainly CH_(3)CO_(2)^(·)and CH_(3)CO_(3)^(·)),HO^(·)and^(1)O_(2)in this ***,density functional theory(DFT)calculation on Fukui index further revealed that the vulnerable sites of TTCH and three possible degradation pathways were *** study can provide a new strategy for synthesis functional materials in PAA activation AOPs for removal of antibiotics in water.

关键词： Biochar Peracetic acid(PAA) Tetracycline hydrochloride Intermediates DFT calculation

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