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Composition and Evolution of Hydrogen Isotopes of n-Akanes Generated from Anhydrous Pyrolysis of Sediments from Lake Gahai,Gannan,China

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Acta Geologica Sinica(English Edition) 2021年第5期95卷 1725-1735页

作者： DUAN Yi WU Yingzhong xing lantian LI Zhongping ZHANG Ting Northwest Institute of Eco-Environment and Resources Chinese Academy of Sciences and Gansu Provincial Key Laboratory of Petroleum ResourcesLanzhou 730000China School of Earth Science&Resources Chang’an UniversityXi’an 710054China Shaanxi Center of Mineral Geological Survey Xi'an 710068China

To understand the thermal evolution of lacustrine sedimentary n-alkane hydrogen isotopic composition(δD),especially bacterially derived n-alkanes,anhydrous thermal simulation experiments were performed with sediments from Lake Gahai(Gannan,China).We analyzed the original and pyrolysis-generated n-alkanes and theirδD *** results showed that thermal maturity and n-alkane origins significantly affected the distribution of pyrolysis-generated *** immature to post-mature sediments,the bacterial-derived medium-chain n-alkanes generally had depletedδD *** maximum difference in averageδD values between the bacterial-and herbaceous plant-derived medium-chain n-alkanes was 32‰,and the maximum difference in δD values among individual n-alkanes was 59‰.We found that the averageδD value of pyrolysis-generated n-alkanes from different latitude was significantly different in immature to highly mature sediments,but similar in post-mature *** hydrogen isotopes of sedimentary n-alkanes can be used as indicators for paleoclimate/paleo-environment conditions only when sediments are immature to highly *** thermal evolution,the δD value of generated individual n-alkanes and the averageδD value increased with thermal maturity,indicating that hydrogen isotopes of sedimentary n-alkanes can be used as an index of organic matter *** established mathematical models of average δD values of generated n-alkanes from immature to post-mature sediments using n C_(21)^(-)/nC_(21)^(+)and average chain *** results improve our understanding of the distribution andδD value of sedimentary n-alkanes derived from herbaceous plants in mid-latitude plateau cold regions.

关键词： freshwater lake sediment n-alkane simulation experiment bacterial origin hydrogen isotope thermal evolution

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A Comparison Study on the δD Value of Polycyclic Aromatic Hydrocarbons in Hydrous Pyrolysate of Herbaceous Peat with Different Water Medium

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Acta Geologica Sinica(English Edition) 2023年第6期97卷 1734-1743页

作者： DUAN Yi WU Yingzhong xing lantian WU Yingqin ZHAO Yang LI Zhongping MA Lanhua DUAN Mingchen Northwest Institute of Eco-Environment and Resources Chinese Academy of Sciences and Gansu Provincial Key Laboratory of Petroleum ResourcesLanzhou 730000China Shaanxi Center of Mineral Geological Survey Xi'an 710068China College of Petroleum Engineering Liaoning Shihua UniversityFushunLiaoning 113001China Earthquake Research Institute of Lanzhou SSBLanzhou 730000China Business School Gansu University of Political Science and LawLanzhou 730070China

To investigate the influence of diagenetic water media on the hydrogen isotopes of individual sedimentary aromatic compounds,a series of hydrous pyrolyses were conducted on herbaceous *** aromatic hydrocarbons(PAHs)in hydrous pyrolysed samples and their hydrogen isotopic composition characteristics were *** aqueous medium demonstrated a significant influence on the hydrogen isotopic composition of the individual PAHs generated during *** results showed that the PAHs formed after pyrolysis in the presence of a saltwater medium with high δD value from a salt lake had a heavy hydrogen isotopic *** PAHs formed after pyrolysis in the presence of a fresh water medium with low δD value from a swamp had a light hydrogen isotopic *** difference in the average PAHδD value between the two hydrous experiments varied from -174‰ to -109‰,suggesting that the hydrogen isotopic composition of individual sedimentary PAHs can reflect the source of the diagenetic water *** addition,a comparative study found that the hydrogen isotopes of PAHs were superior to those of n-alkanes in the same sample for diagenetic water *** results indicated that the exchange of water-derived inorganic hydrogen and organic hydrogen was more intensive in freshwater experiments than in saltwater *** an increase in the simulation temperature,the average δD value of PAHs generated in the hydrous simulation experiments showed an increasing trend,reflecting that the δD value of sedimentary PAHs formed with the participation of diagenetic water media was still closely related to the thermal maturity of organic *** studies showed that theδD values of different types of organic compounds produced by hydrous pyrolysis of peat were in the order,PAHs>n-alkanes>methane.

关键词： hydrogen isotope PAHs hydrous pyrolysis herbaceous peat water medium

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Comparative Study of Hydrogen and Carbon Isotopic Composition of Gases Generated from the Pyrolysis of a Peat under Saltwater and Freshwater Conditions

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Acta Geologica Sinica(English Edition) 2018年第5期92卷 1879-1887页

作者： WU Yingzhong DUAN Yi ZHAO Yang CAO Xixi MA Lanhua QIAN Yaorong LI Zhongping xing lantian Key Laboratory of Petroleum Resources Gansu Province/Key Laboratory of Petroleum Resources ResearchNorthwest Research Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou 730000China School of Earth Science&Resources Chang'an UniversityXi'an 710054China University of Chinese Academy of Science Beijing 100049China College of Petroleum Engineering Liaoning Shihua UniversityFushun 113001LiaoningChina Admissions Office Lanzhou UniversityLanzhou 730000China Earthquake Research Institute ofLanzhou SSBLanzhou 730000China Analytical Chemistry Branch Office of Pesticide ProgramsUS EPA701 Mapes RdFort MeadeMD 20755-5350USA

To understand the influence of the diagenetic water medium on the isotopic compositions of thermogenic coalbed gas, both hydrous and anhydrous closed-system pyrolyses were performed at temperatures of 250°C to 650°C on an herbaceous marsh peat. Compared to the results of anhydrous pyrolysis, the hydrocarbon gases generated from hydrous pyrolyses have very different hydrogen isotopic compositions. However, the carbon isotopic compositions of the hydrocarbon gases became only slightly heavier in hydrous pyrolysis, compared to that from anhydrous pyrolysis. With the progress of thermal evolution from peat to a more advanced thermal maturity of vitrinite reflectance values（Ro） of 5.5% during the pyrolysis, the difference in the average δD value increased from 52‰ to 64‰ between the hydrous pyrolysis with saltwater and anhydrous pyrolysis and increased from 18‰ to 29‰ between the hydrous pyrolysis with freshwater and anhydrous pyrolysis, respectively. The difference in the average δ^（13）C value was only 1‰–2‰ between the hydrous and anhydrous pyrolysis. The relationships between the δD values of the generated hydrocarbon gases and Ro values as well as among δD values of the hydrocarbon gas species are established. The close relationships among these parameters suggest that the water medium had a significant effect on the hydrogen isotopic composition and a minimal effect on the carbon isotopic composition of the hydrocarbon gases. The results of these pyrolyses may provide information for the understanding of the genesis of coalbed gas from herbaceous marsh material with the participation of different diagenetic water media.

关键词： simulation experiment gas product hydrogen and carbon isotope diagenetic water medium influencing factor Xinjiang

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AN APPLIED RESEARCH ON APPROACH OF DYADIC WAVELET TRANSFORM FOR REMOTE SENSING IMAGE EDGE DETECTION

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Journal of Electronics(China) 2006年第4期23卷 535-538页

作者： Fu Wei xing Guangzhong Hou lantian Qin Qiming Wang Wenjun Department of Communicaton ＆ Electricity Engineering Yanshan University Qinhuangdao 066004 China Remote Sensing Institute Peking University Beijing 100871 China

In the edge detection of Remote Sensing (RS) image, the useful detail losing and the spurious edge often appear. To solve the problem, the authors uses the dyadic wavelet to detect the edge of surface features by combining the edge detecting with the multi-resolution analyzing of the wavelet transform. Via the dyadic wavelet decomposing, the RS image of a certain appropriate scale is obtained, and the edge data of the plane and the upright directions are respectively figured out, then the gradient vector module of the surface features is worked out. By tracing them, the authors get the edge data of the object, therefore build the RS image which obtains the checked edge. This method can depress the effect of noise and examine exactly the edge data of the object by rule and line. With an experiment of an RS image which obtains an airport, the authors certificate the feasibility of the application of dyadic wavelet in the object edge detection.

关键词： Dyadic wavelet transform Edge detection and tracking of Remote Sensing (RS) Object recognition

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宁洱火山区壳内岩浆囊现今温度:来自CO_2-CH_4碳同位素地质温度计的估计

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岩石学报 2017年第1期33卷 231-249页

作者：赵慈平王云周挚李中平邢蓝田云南省地震局昆明650124 中国科学院地质与地球物理研究所兰州油气资源研究中心兰州730000

温度是岩浆囊的重要物理参数,获取温度参数并监测其变化对更好地理解岩浆囊的物理化学性质和行为、评价火山的活动性和喷发危险性具有重要的理论和现实意义。火山岩浆-水热系统丰富的含碳气体,这些含碳气体间碳同位素温度计为我们解决... 详细信息

温度是岩浆囊的重要物理参数,获取温度参数并监测其变化对更好地理解岩浆囊的物理化学性质和行为、评价火山的活动性和喷发危险性具有重要的理论和现实意义。火山岩浆-水热系统丰富的含碳气体,这些含碳气体间碳同位素温度计为我们解决休眠火山区地下岩浆囊的温度问题提供了可能。我们对宁洱火山区地表地热异常强度最高区的4个温泉点CO_2、CH_4碳同位素组成进行了2年的连续观测和2次平行观测,利用观测数据对CO_2、CH_4气体的岩浆来源进行了甄别,对CO_2-CH_4间碳同位素分馏是否发到平衡进行了判断,然后利用Horita CO_2-CH_4碳同位素平衡分馏方程计算了宁洱-通关火山区逸出气体的源区温度。结果表明:宁洱火山区4个样点中,1个样点的CO_2和CH_4均为非岩浆成因,其他3个样点的主要属于岩浆来源。剔除了非岩浆来源的数据后的δ-Δ图解法判断CO_2-CH_4间碳同位素分馏达到了平衡。3个样点的CO_2、CH_4碳气体源区温度分别为425~475℃、941~995℃和1179~1578℃。结合最上部地壳温度场结果,我们认为,宁洱火山区现今存在2个壳内岩浆房,分别位于宁洱火山以南和通关火山以北,宁洱岩浆房的温度为1179~1578℃,通关岩浆房的温度为941~995℃。2个岩浆房的现今温度已达到流纹岩浆(600~900℃)、安山岩(800~1100℃)和玄武岩浆(1000~1250℃)的形成温度。思普地震带空间上密集的6级地震丛集活动可以用宁洱岩浆房的高活动性来解释。δ-Δ图解法判断CO_2-CH_4间碳同位素分馏平衡准则应修正为:在保持两拟合直线的斜率符号相反的条件下,δ^(13)CCO_2-ΔCO_2-CH_4拟合直线和δ^(13)CCH_4-ΔCO_2-CH_4拟合直线应相交于δ轴附近截距差Δb≤0.16处。

关键词：岩浆温度碳同住素地质温度计 CO2 CH4 温泉气体宁洱火山区

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Development of new method of δ13C measurement for trace hydrocarbons in natural gas using solid phase micro-extraction coupled to gas chromatography isotope ratio mass spectrometry

Development of new method of δ13C measurement for trace hyd...

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中国科学院地质与地球物理研究所2014年度（第14届）学术年会

作者： Zhongping Li Xibin Wang Liwu Li Mingjie Zhang Mingxin Tao lantian xing Chunhui Cao Yanqing Xia Key Laboratory of Petroleum Resources Gansu Province/Key Laboratory of Petroleum Resources ResearchInstitute of Geology and GeophysicsChinese Academy of Sciences School of Earth Sciences and Gansu Key Laboratory of Mineral Resources in Western China Lanzhou University College of Resources Science and Technology Beijing Normal University

Compound specific isotope analysis(CSIA)of normal-level hydrocarbons(C-C)in natural gas is often successfully used in natural gas origin identification and classification,but little progress so far has been made for trace level hydrocarbons(C-C)in natural *** this study,we developed a method for rapid analysis of carbon isotopic ratios for trace hydrocarbons in natural gas *** method can be described as a combined approach characterized by solid phase micro-extraction(SPME)technique coupled to gas chromatography isotope ratio mass spectrometry(GC/IRMS).In this study,the CAR-PDMS fiber was chosen as the SPME adsorptive material after comparative experiments with other four fibers,and the parameters,including equilibration time,extraction temperature and desorption time,for efficient extraction of trace hydrocarbons were systematically *** results showed the carbon isotopic fractionation was not observed as a function of equilibration time and extraction *** theδC signatures determined by SPME-GC/IRMS were in good agreement with the knownδC values of C-Cmeasured by GC-IRMS,and the accuracy is generally within±0.5‰.Five natural gas samples were analyzed using this method,and theδC values for C-Ccomponents were obtained with satisfied *** SPME-GC/IRMS approach fitted with CAR-PDMS fiber is well suited for the preconcentration of trace hydrocarbons and provides so far the most reliable carbon isotopic analysis for trace compounds in natural gas.

关键词： Carbon isotope Solid-phase micro extraction Gas chromatography Isotope ratio mass spectrometry Trace hydrocarbons Natural gas

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塔北哈拉哈塘—英买力地区深层油气运移与成藏地球化学特征

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石油学报 2015年第S2期36卷 92-101页

作者：李素梅张宝收邢蓝田孙浩袁兴雁油气资源与探测国家重点实验室北京102249 中国石油大学地球科学学院北京102249 中国石油塔里木油田公司新疆库尔勒841000 中国科学院地质与地球物理研究所兰州油气资源研究中心甘肃兰洲730000

采用地质、地球化学分析对哈拉哈塘—英买力地区油气特征、烃源灶部位、油气运移与成藏特征进行了反演研究。结果表明:原油物理与化学特征差异显著但有序分布,原油成熟度差异显著但成因相近。油-油、油-岩成熟度对比显示英买力地区原油... 详细信息

采用地质、地球化学分析对哈拉哈塘—英买力地区油气特征、烃源灶部位、油气运移与成藏特征进行了反演研究。结果表明:原油物理与化学特征差异显著但有序分布,原油成熟度差异显著但成因相近。油-油、油-岩成熟度对比显示英买力地区原油与研究区埋深相近的泥灰岩没有可比性,哈拉哈塘地区深部奥陶系原油与埋深6 500~7 500 m的烃源岩成熟度相当,指示烃源灶为相邻凹陷。油气运移与成藏具有:1准差异聚集特征,从斜坡低部位至高部位,油气相态从轻质油—中质油—稠油呈规律性分布;2断层控制油气运移与聚集,油气主要聚集在断层附近,烃类流体性质、储层质量显著受控于断层,高气/油比油气主要出现在断层泄压区;3风化壳显著控制油气聚集与分布,油气主要分布在准层状风化壳上、下的岩溶储层内,具有多期充注成藏特征;4油气成藏模式为异地源-断控运移-准差异聚集-风化壳储油-多期叠加成藏模式。

关键词：塔里木盆地含油气盆地深层油气运移走滑断层成藏模式

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鄂尔多斯盆地林镇地区延安组延8油层组储层特征及孔隙演化

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新疆地质 2014年第4期32卷 509-513页

作者：邢蓝田徐丽段毅刘晔甘肃省油气资源研究重点实验室中国科学院油气资源研究重点实验室甘肃兰州730000 兰州大学地质科学与矿产资源学院甘肃兰州730000 中国石油勘探开发研究院西北分院甘肃兰州730020 甘肃省地质博物馆甘肃兰州730000

近年来林镇地区延安组延8油层组中不断发现新油气。利用岩心观察、薄片鉴定等分析手段,对储层特征及成岩作用进行研究,定量分析成岩过程中储层孔隙演化特征。结果表明:研究区东北部一带砂体连续,厚度普遍在14 m以上,为该区优势储集体;... 详细信息

近年来林镇地区延安组延8油层组中不断发现新油气。利用岩心观察、薄片鉴定等分析手段,对储层特征及成岩作用进行研究,定量分析成岩过程中储层孔隙演化特征。结果表明:研究区东北部一带砂体连续,厚度普遍在14 m以上,为该区优势储集体;储层砂岩矿物成熟度较低,结构成熟度中等,沉积时环境相对稳定;孔隙类型以溶蚀孔为主,残余粒间孔次之;该储层目前达晚成岩阶段A期。储层原始孔隙度为33.6%,其演化过程主要受压实作用、胶结作用和溶蚀作用控制,压实及胶结作用导致原始孔隙度丧失16.7%与10.7%,后期溶蚀作用形成6.8%次生孔隙,有效地提升了延8油层组储层的孔隙度。

关键词：鄂尔多斯盆地林镇延8油层组孔隙演化成岩作用

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不同介质条件下油页岩热解的初步研究

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石油炼制与化工 2012年第10期43卷 45-48页

作者：邢蓝田夏燕青雷天柱徐丽中国科学院地质与地球物理研究所兰州油气资源研究中心兰州730000 中国科学院研究生院

利用高压釜热解实验装置,对采自民和盆地的油页岩进行全岩、全岩加去离子水和全岩加碱性饱和KCl溶液等3个系列的热解实验研究,并对这3个系列生成的页岩气和页岩油进行对比分析。结果表明:介质的加入有利于液态物的产出,跟油页岩直接加... 详细信息

利用高压釜热解实验装置,对采自民和盆地的油页岩进行全岩、全岩加去离子水和全岩加碱性饱和KCl溶液等3个系列的热解实验研究,并对这3个系列生成的页岩气和页岩油进行对比分析。结果表明:介质的加入有利于液态物的产出,跟油页岩直接加热相比,去离子水的加入使得页岩油的平均产率从83.66mg/g提高到210.15mg/g,但是抑制页岩气的生成;而碱性饱和KCl溶液的加入对页岩油和页岩气都有贡献,使得页岩油平均产率从83.66mg/g提高到186.16mg/g,页岩气平均产率从7.56mL/g增大到9.08mL/g。

关键词：油页岩热解页岩油页岩气

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不同类型有机黏土中化学结合态有机质生油能力差异性研究

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石油实验地质 2015年第4期37卷 487-493页

作者：杨燕雷天柱邢蓝田蔡进功吴应琴斯贵才甘肃省油气资源研究重点实验室/中国科学院油气资源研究重点实验室兰州730000 中国科学院大学北京100049 同济大学海洋地质国家重点实验室上海200092

通过高温高压加水热模拟,对蒙脱石型有机黏土中化学结合态有机质与伊利石型有机黏土中化学结合态有机质的生油能力进行了比较研究。实验结果表明,2种类型有机黏土中化学结合态有机质向原油的极限转化能力相当,生成原油数量的多少主要取... 详细信息

通过高温高压加水热模拟,对蒙脱石型有机黏土中化学结合态有机质与伊利石型有机黏土中化学结合态有机质的生油能力进行了比较研究。实验结果表明,2种类型有机黏土中化学结合态有机质向原油的极限转化能力相当,生成原油数量的多少主要取决于有机质的多寡;有机黏土中化学结合态有机质会对低熟油做出贡献,但它们主体的贡献都在于生成成熟原油;蒙脱石型有机黏土中化学结合态有机质较伊利石型有机黏土中化学结合态有机质表现出更好的持续生烃性;2种类型的有机黏土,其化学结合态有机质都易生成含氮、氧、硫等杂原子的非烃物质;蒙脱石型有机黏土中化学结合态有机质较伊利石型有机黏土中化学结合态有机质更易生成含氮、氧、硫等杂原子的非烃物质。因此,对于早期生过烃的深层泥质烃源岩,在二次生烃评价时,应重点强调有机碳含量、弱化矿物类型,同时应考虑原油品质变差这一现实。

关键词：化学结合态有机质有机黏土生油差异热模拟

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