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Carbon isotopic compositions of 1,2,3,4-tetramethylbenzene in marine oil asphaltenes from the Tarim Basin:Evidence for the source formed in a strongly reducing environment

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Science China Earth Sciences 2008年第4期51卷 509-514页

作者： JIA WangLu peng pingan XIAO ZhongYao State Key Laboratory of Organic Geochemistry Guangzhou Institute of GeochemistryChinese Academy of SciencesGuangzhou 510640China Tarim Oilfield Company PetroChinaKorla 841000China

Although 1-alkyl-2,3,6-trimethylbenzenes and a high relative amount of 1,2,3,4-tetramethylbenzene have been detected in marine oils and oil asphaltenes from Tabei uplift in the Tarim Basin, their bio-logical sources are not determined. This paper deals with the molecular characteristics of typical ma-rine oil asphaltenes from Tabei and Tazhong uplift in the Tarim Basin and the stable carbon isotopic signatures of individual compounds in the pyrolysates of these asphaltenes using flash pyrolysis-gas chromatograph-mass spectrometer (PY-GC-MS) and gas chromatograph-stable isotope ratio mass spectrometer (GC-C-IRMS), respectively. Relatively abundant 1,2,3,4-tetramethylbenzene is detected in the pyrolysates of these marine oil asphaltenes from the Tarim Basin. δ 13C values of 1,2,3,4-tetrame-thylbenzene in the pyrolysates of oil asphaltenes vary from-19.6‰ to-24.0‰, while those of n-alkanes in the pyrolysates show a range from-33.2‰ to-35.1‰. The 1,2,3,4-tetramethylbenzene in the pyro-lysates of oil asphaltenes proves to be significantly enriched in 13C relative to n-alkanes in the pyro-lysates and oil asphaltenes by 10.8‰―15.2‰ and 8.4‰―13.4‰, respectively. This result indicates a contribution from photosynthetic green sulfur bacteria Chlorobiaceae to relatively abundant 1,2,3,4-tetramethylbenzene in marine oil asphaltenes from the Tarim Basin. Hence, it can be speculated that the source of most marine oil asphaltenes from the Tarim Basin was formed in a strongly reducing water body enriched in H2S under euxinic conditions.

关键词： 1 2 3 4-tetramethylbenzene asphaltenes marine oils the Tarim Basin carbon isotopic composition

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Study of genetic evolution of oil inclusion and density of surface oil by measurement of fluorescence lifetime of crude oil and oil inclusion

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Science China Earth Sciences 2017年第1期60卷 95-101页

作者： LIU DeHan XIAO XianMing CHENG peng SUN YongGe TIAN Hui peng pingan Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou 510640 China School of Earth Sciences Zhejiang University Hangzhou 310058 China

By using fluorescence lifetime image microscope （FLIM） and time-correlated single photon counting （TCSPC） technique, we measured fluorescence lifetime of crude oils with density of 0.9521-0.7606 g/cm3 and multiple petroleum inclusions from Tazhong uplift of Tarim Basin. As indicated by the test results, crude oil density is closely correlated with average fluorescence lifetime following the regression equation Y=-0.0319X＋0.9411, which can thus be used to calculate density of oil inclusions in relation to fluorescence lifetime and density of corresponding surface crude. For type A oil inclusions showing brown-yellow fluorescence from Tazhong 1 well in Tarim Basin, their average fluorescence lifetime was found to be 2.144-2.765 ns, so the density of surface crude corresponding to crude trapping these oil inclusions is 0.852-0.873 g/cm3, indicating that they are matured oil inclusions trapped at earlier stage ofoil formation. For type B oil inclusions with light yellow-white fluorescence, their average fluorescence lifetime was found to be 4.0294.919 ns, so the density of surface crude corresponding to crude trapping these oil inclusions is 0.784-0.812 g/cm3, indicating that they are higher matured oil inclusions trapped at the second stage of oil formation. For type C oil inclusions showing light blue-green fluorescence, their average fluorescence lifetime was found to be 5.0634.168 ns, so the density of surface crude corresponding to crude trapping these oil inclusions is 0.743-0.779 g/cm3, indicating that they are highly-matured light oil inclusions trapped at the third stage of oil formation.

关键词： Oil inclusion Fluorescence lifetime Tarim Basin Crude density Crude charging episode

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Branched glycerol dialkyl glycerol tetraethers and paleoenvironmental reconstruction in Zoigê peat sediments during the last 150 years

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Chinese Science Bulletin 2011年第23期56卷 2456-2463页

作者： ZHOU HaoDa HU JianFang MING LiLi peng pingan ZHANG Gan Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou 510640 China Graduate University of Chinese Academy of Sciences Beijing 100049 China

Branched glycerol dialkyl glycerol tetraethers (GDGTs) were analyzed in peat samples taken from the Zoigê grassland, located on the eastern margin of the Qinghai-Tibetan Plateau. The mean annual air temperature (MAAT) and pH in the 210 Pb-dating peat core were reconstructed based on the cyclization of branched tetraethers (CBT) and methylation of branched tetraethers (MBT) indices for the last 150 years. The results showed that the MAAT and pH values involved three stages of variation over the last 150 years. The pH was stable and the MAAT decreased slowly by about 1°C from 1851 to 1927. The pH decreased rapidly by 0.6 and the MAAT decreased significantly by 2.5°C between 1927 and 1979. The pH and MAAT increased by 0.8 and 5°C, respectively, since the 1980s. The reconstructed temperatures correspond well to the mean winter temperatures reconstructed using tree-rings from the Jiuzhaigou Valley, situated at the boundary between the Qinghai-Tibetan Plateau and the Sichuan Basin. The estimated MAAT was similar to the temperatures reconstructed using tree-rings, indicating an increasing trend, as shown by local instrumental records from 1957 to 2001. These results provide further confidence in the application of proxies based on glycerol dialkyl glycerol tetraethers in peat records for continental paleoclimate reconstruction.

关键词：泥炭记录二烷基甘油精神古环境沉积物青藏高原东缘空气温度

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Identification of the Kukersite-type source rocks in the Ordovician Stratigraphy from the Tarim Basin, NW China

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Chinese Science Bulletin 2013年第1期58卷 4450-4458页

作者： SUN YongGe MAO ShengYi WANG FeiYu peng pingan CHAI PingXia State Key Laboratory of Organic Chemistry Guangzhou Institute of Geochemistry Chinese Academy of Sciences Department of Earth science Zhejiang University University of Chinese Academy of Sciences Department of Geosciences China University of Petroleum (Beijing)

Due to the importance of the Gloeocapsomorpha Prisca(***)-enriched source rocks,which belong to Kukersite-type source rocks in the Lower Paleozoic Ordovician strata,it has received great attentions during the petroleum exploration as to whether there are the Kukersite-type source rocks developed in the major hydrocarbon source strata of the Upper and Middle Ordovician in the Tarim *** pyrolysis-gas chromatography-mass spectrography to analyse kerogens from source rocks in the limemud mound with moderate maturity,study reveals that there are the Kukersite-type source rocks in the Ordovician strata of the Tarim *** pyrolysis products showed a low content of>n-C19normal alkanes with a significant odd-even predominance between n-C13and n-C17,long-chain alky substituted alkylbenzene and alkylthiophene isomers and distinctive distribution of 5-Nalkyl-1,3-Benzenediol and its *** on the geographic environment characteristics of ***,the molecular distributions of crude oil from the Lower Paleozoic petroleum systems in the Tarim Basin and characteristics of kerogen pyrolysis products from the Middle and Upper Ordovician source rocks,the results suggested that it is less possible to develop the ***-enriched Kukersite-type source rocks in the major hydrocarbon source rocks in the Middle and Upper Ordovician strata in the Tarim ***,the benthic macroalga and planktonic algae-enriched source rocks are the main contributors.

关键词：塔里木盆地奥陶纪地层烃源岩 e型鉴定中国裂解气相色谱下古生界

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Molecular characterization of sulfur compounds in some special sulfur-rich Chinese crude oils by FT-ICR MS

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Science China Earth Sciences 2014年第1期57卷 1158-1167页

作者： LU Hong SHI Quan MA QingLin SHI Yang LIU JinZhong SHENG GuoYing peng pingan State Key Laboratory of Organic Geochemistry Guangzhou Institute of Geochemistry Chinese Academy of Sciences State Key Laboratory of Heavy Oil China Petroleum University Beijing Southern Petroleum Exploration and Development Ltd. (CNPC)

Routine GC/MS analysis may apply to the volatilized Low-Molecular-Weight compounds in saturate and aromatic hydrocarbon fractions;thus,relative studies using this technique inevitably bring about some limitations on distribution of miscellaneous sulfur *** this article,Fourier Transform Ion Cyclotron Resonance Mass Spectrometry(FT-ICR MS)with high resolution is employed to investigate the distribution of organic sulfur compounds(OSCs)in the crude oil typically derived from the Eogene carbonate-evaporite sediments with further chemical compositional characterization in molecular level by miscellaneous atomic type,carbon number,and double bond equivalent(DBE).A variety of miscellaneous atomic types with S1,S2,S3,OS,OS2,O2S,O2S2,NS,and NOS etc.(S1 means those OSCs with one sulfur atom in a molecule)were identified in OSCs in these oil *** levels of alkyl thioether series compounds with one ring structure were presented mainly in the crude oil in the Jianghan Basin whereas high amounts of benzothiophene,dibenzothiophene *** with higher values in DBE and carbon number range occurred in the sulfur-rich heavy oil in the Jinxian *** carbonate-evaporite sediments deposited in the saline lacustrine facies in the Eogene basin both occurred in the Jinxian Sag and Jianghan Basin,obviously,they possess different chemical diagenetic pathway of sulfur under various microbial reactions,leading to diverse distributional characteristics on biomarkers,OSCs,and even different hydrocarbon generation mechanism of immature crude oil.

关键词： ESI FT-ICR MS organic sulfur compounds sulfur-rich oil Jianghan Basin Jinxian Sag

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TEG Thrombelastography Test for Bedside Monitoring of Anticoagulation in Elderly Patients

TEG Thrombelastography Test for Bedside Monitoring of Antico...

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中华医学会第十五次全国心血管病学大会

作者： pingan peng YuJie Zhou Beijing Anzhen Hospital affiliated to Capital Medical University

Background Low-molecular-weight heparins (LMWHs) are one of the most widely used anticoagulants for thromboprophylaxis in elderly patients. The available laboratory tests for monitoring LMWH anticoagulation are time-consuming and expensive, and the suitability of the conventional activated clotting time (ACT) is controversial. A simple and cheap bedside test using Thrombelastography (TEG) may be

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复杂不规则地质体的速度模型反演

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煤炭学报 2018年第S2期43卷 420-425页

作者：蒋元建王李管彭平安中南大学资源与安全工程学院

针对不规则地质体的速度模型反演问题,提出基于无限插值法生成的贴体网格建立地质模型与走时层析成像相结合的方法。首先采用贴体网格描述不规则地质体,在网格建立的基础上,采用最短路径法得到震源到接收器的走时与射线路径;然后根据走... 详细信息

针对不规则地质体的速度模型反演问题,提出基于无限插值法生成的贴体网格建立地质模型与走时层析成像相结合的方法。首先采用贴体网格描述不规则地质体,在网格建立的基础上,采用最短路径法得到震源到接收器的走时与射线路径;然后根据走时与射线路径,采用反投影方法(BPT)与阻尼最小二乘法(DLSQR)相结合的技术作为走时反演方法。通过走时反演迭代,最后得到速度模型。整个过程在Matlab中编程实现,并在理论初至上加了10%的高斯噪声,用数值模拟验证。数值验证结果表明:97.5%网格单元理论与反演的速度差在±300 m/s内,对应的相对误差在6.35%之内;理论速度与反演速度基本一致,高低速区域层次分明,反演效果良好,为复杂不规则地质体的速度模型反演提供了新方法。

关键词：速度模型无限插值法贴体网格走时反演技术

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有机地球化学研究新进展与展望

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沉积学报 2017年第5期35卷 968-980页

作者：胡建芳彭平安中国科学院广州地球化学研究所有机地球化学国家重点实验室广州510640

阐述了近五年有机地球化学领域的重要研究进展和未来有可能出现新突破的领域。在沉积有机质的性质和结构的认识上有重要进展,由于分子和分子同位素测试技术的进步,发现对有机质参与的地球化学全过程能够进行定性研究。阐述了与烃源岩发... 详细信息

阐述了近五年有机地球化学领域的重要研究进展和未来有可能出现新突破的领域。在沉积有机质的性质和结构的认识上有重要进展,由于分子和分子同位素测试技术的进步,发现对有机质参与的地球化学全过程能够进行定性研究。阐述了与烃源岩发育相关的环境与控制因素,但具体形成机制的推断还没有得到沉积记录的验证。生物—有机地球化学在定量环境变化与古生态系统重建研究等方面作出了独特的贡献。未来关于过度型有机质和石油天然气成藏过程定量化重建研究将是有机地球化学有可能出现新突破的领域。新的成份与同位素测定新技术的引入将促进有机地球化学相关研究领域的发展。

关键词：沉积学有机地球化学有机质

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Heavy metal concentrations of agricultural soils and vegetables from Dongguan, Guangdong

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Journal of Geographical Sciences 2010年第1期20卷 121-134页

作者： CAI Limei HUANG Lanchun ZHOU Yongzhang XU Zhencheng peng Xiaochun YAO Ling＇ai ZHOU Yang peng Ping＇an State Key Laboratory of Organic Geochemistry Guangzhou Institute of Geochemistry CAS Guangzhou 510640 China Research Center of the Pearl River Delta Environmental Pollution and Control Guangzhou 510640 China South China Institute of Environmental Sciences Ministry of Environmental Protection Guangzhou 510655 China Center for Earth Environment and Resources Sun Yat-sen University Guangzhou 510275 China

A total of 118 of agricultural soil and 43 of vegetable samples were collected from Dongguan City, Guangdong, China. The spatial distribution, sources, accumulation characteristics and potential risk of heavy metals in the agricultural soils and vegetables were depicted in details by three different approaches, including total contents of eight metal elements in soils and vegetables, GIS maps and multivariate analysis of heavy metals in soils in the study. The results show that there are higher accumulation of heavy metals such as Cu, Zn, Ni, Pb, Cd and Hg in agricultural soils, and the contents of Pb （65.38 mg kg^-1） and Hg （0.24 mg kg^-1） are 1.82 and 2.82 times of the background contents of the corresponding heavy metals in soils of Guangdong Province, respectively. There are about 3.4% of Cu, 5.9% of Ni, 1.7% of Cd and 28% of Hg in all collected soil samples from all investigated sites which have overran the contents for heavy metals of the China Environmental Quality Standard for Soils （GB15618-1995, Grade Ⅱ）. The pollution characteristics of multi-metals in soils are mainly reflected by Hg. There are different sources to eight metal elements in soils, Cu, Zn, Ni Cr and As are predominantly derived from parent materials, and Pb, Hg and Cd are affected by anthropogenic activities. The spatial distribution shows that the Cu, Zn, Ni, Cr, Pb, As and Hg contents of agricultural soils are high in the west and low in the east, and Cd contents are high in the northwest, southeast and low in the southwest in Dongguan. The ratios of vegetable samples which Ni, Pb and As concentrations higher than the Maximum Levels of Contaminants in Foods （GB2762-2005） are 4.7%, 16.3% and 48.8%, respectively. The order of bio-concentration factors （BCF） of heavy metals in vegetables is Cd 〉 Zn 〉 Cu 〉 As 〉 Ni 〉 Hg 〉 Cr 〉 Pb. It is necessary to focus on potential risk of heavy metals for food safety and human＇s health from agricultural soils and vegetables in Dongguan City, Guangdong Prov

关键词： agricultural soil vegetable heavy metal pollution spatial distribution Dongguan

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矿岩崩落块度预测的节理面三维模拟技术及其应用

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矿冶工程 2015年第3期35卷 22-26页

作者：彭平安王李管中南大学资源与安全工程学院湖南长沙410083 中南大学数字矿山研究中心湖南长沙410083

基于传统二维状态下块度预测存在的弊端,提出以构造面的空间展布规律为基础,利用Monte Carlo技术模拟节理系统,采用三维实体切割技术建立块体三维截取模型的矿岩块度预测新模型,实现了矿岩崩落块度的三维预测,并开发了相应软件OFP 1.0(O... 详细信息

基于传统二维状态下块度预测存在的弊端,提出以构造面的空间展布规律为基础,利用Monte Carlo技术模拟节理系统,采用三维实体切割技术建立块体三维截取模型的矿岩块度预测新模型,实现了矿岩崩落块度的三维预测,并开发了相应软件OFP 1.0(Ore Fragments Prediction)。研究成果应用于某特大型斑岩铜矿,预测结果表明:该矿山等效尺寸大于1.65 m的块体筛上累积百分比为40%,大于1.26 m的块体筛上累积百分比为59.85%。根据等效尺寸与块体体积的转换关系,建议放矿口尺寸设置为5 m×5 m,此时放矿口堵塞几率较小。研究成果为自然崩落法矿山采矿方法设计和工程中的放矿控制提供了重要依据。

关键词：自然崩落法块度预测 Monte Carlo法节理面模拟

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