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High-resolution sedimentary record of hydrocarbon contaminants in a core from the major reaches of the Pearl River, China

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Chinese Science Bulletin 2000年第S1期45卷 97-104页

作者： MAI Bixian SHENG Guoying LIN Zheng ZHANG Gan MIN Yushun FU Jiamo State Key laboratory of organic geochemistry Guangzhou Institute of GeochemistryChinese Academy of SciencesGuangzhou 510640China Guangdong Key laboratory of Environmental Protection and Resources Utilization Guangzhou Institute of GeochemistryChinese Academy of SciencesGuangzhou 510640China

The concentrations and compositions of hydrocarbon contaminants, and molecular marker indices in modern sediments from a core in the major reaches of the Pearl River were investigated. The sedimentary record of hydrocarbons in the core, in combination with 210Pb-dating, was used to reconstruct the pollution history of hydrocarbon pollutants in the Pearl River in the past 100 years.

关键词： organic contaminants sedimentary record sedimentary core.

Carbonyl sulfide and dimethyl sulfide fluxes in an urban lawn and adjacent bare soil in Guangzhou,China

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Journal of Environmental Sciences 2011年第5期23卷 784-789页

作者： Zhigang Yi Xinming Wang College of Resources and Environment Fujian Agriculture and Forestry University Fuzhou 350002 China. E-mail:zgyi@*** State Key laboratory of organic geochemistry Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou 510640 China

Carbonyl sulfide （COS） and dimethyl sulfide （DMS） fluxes from as urban Cynodon dactylon lawn and adjacent bare soil were measured during April-July 2005 in Guangzhou, China. Both the lawn and bare soil acted as sinks for COS and sources for DMS. The mean fluxes of COS and DMS in the lawn （-19.27 and 18.16 pmol/（m^***）, respectively） were significantly higher than those in the bare soil （-9.89 and 9.35 pmol/（m^***）, respectively）. Fluxes of COS and DMS in mowed lawn were also higher than those in bare soils. Both COS and DMS fluxes showed diurnal variation with detectable but much lower values in the nighttime than in the daytime. COS fluxes were related significantly to temperature and the optimal temperature for COS uptake was 29℃. While positive linear correlations were found between DMS fluxes and temperature. COS fluxes increased linearly with ambient COS mixing ratios, and had a compensation point of 336 ppt.

关键词： carbonyl sulfide dimethyl sulfide flux urban lawn

Distinct potential aerosol masses under different scenarios of transport at a suburban site of Beijing

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Journal of Environmental Sciences 2016年第1期28卷 52-61页

作者： Biwu Chu Yongchun Liu Qingxin Ma Jinzhu Ma Hong He Gang Wang Shuiyuan Cheng Xinming Wang State Key Joint laboratory of Environmental Simulation and Pollution Control Research Center for Eco-Environmental SciencesChinese Academy of Sciences Key laboratory of Beijing on Regional Air Pollution Control Beijing University of Technology State Key laboratory of organic geochemistry Guangzhou Institute of Geochemistry Chinese Academy of Sciences

In order to evaluate the secondary aerosol formation potential at a suburban site of Beijing,in situ perturbation experiments in a potential aerosol mass（PAM） reactor were carried out in the winter of *** variations of secondary aerosol formation as a function of time,OH exposure,and the concentrations of gas phase pollutants and particles were reported in this *** periods with distinct secondary aerosol formation potentials,marked as Period Ⅰ and Period Ⅱ,were identified during the *** Period Ⅰ,the secondary aerosol formation potential was high,and correlated well to the air pollutants,i.e.,SO2,NO2,and *** maximal secondary aerosol formation was observed with an aging time equivalent to about 3 days of atmospheric *** period Ⅱ,the secondary aerosol formation potential was low,with no obvious correlation with the air ***,the aerosol mass decreased,instead of showing a peak,with increasing aging *** trajectory analysis during the two periods confirmed that the air mass in Period Ⅰwas mainly from local sources,while it was attributed mostly to long distance transport in Period Ⅱ.The air lost its reactivity during the long transport and the particles became highly aged,resulting in a low secondary aerosol formation *** experimental results indicated that the in situ measurement of the secondary aerosol formation potential could provide important information for evaluating the contributions of local emission and long distance transport to the aerosol pollution.

关键词： Potential aerosol mass Local emission Long distance transport Aging In situ perturbation experiments

Determination of paleo-pressure for a natural gas pool formation based on PVT characteristics of fluid inclusions in reservoir rocks——A case study of Upper-Paleozoic deep basin gas trap of the Ordos Basin

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Science China Earth Sciences 2004年第6期47卷 507-513页

作者： MI Jingkui1,2,XIAO Xianming1,LIU Dehan1,& SHEN Jiagui1 1.State Key laboratory of organic geochemistry,Guangzhou Institute of geochemistry,Chinese Academy of Sciences,Guangzhou 510640,China 2.Institute of Sedimentary Mineral and Resources,Department of Civil Engineering,Xiangtan Polytechnic University,Xiangtan 411201,China State Key laboratory of organic geochemistry Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangz China Institute of Sedimentary Mineral and Resources Department of Civil Engineering Xiangtan Polytechnic University Xiangtan China

It has been proved to be a difficult problem to determine directly trapping pressure of fluid inclusions. Recently, PVT simulation softwares have been applied to simulating the trapping pressure of petroleum inclusions in reservoir rocks, but the reported methods have many limita- tions in practice. In this paper, a method is suggested to calculating the trapping pressure and temperature of fluid inclusions by combining the isochore equations of a gas-bearing aqueous inclusion with its coeval petroleum inclusions. A case study was conducted by this method for fluid inclusions occurring in the Upper-Paleozoic Shanxi Formation reservoir sandstones from the Ordos Basin. The results show that the trapping pressure of these inclusions ranges from 21 to 32 MPa, which is 6─7 MPa higher than their minimum trapping pressure although the trapping temperature is only 2─3℃ higher than the homogenization temperature. The trapping pressure and temperature of the fluid inclusions decrease from southern area to northern area of the basin. The trapping pressure is obviously lower than the state water pressures when the inclusions formed. These data are consistent with the regional geological and geochemical conditions of the basin when the deep basin gas trap formed.

关键词： Ordos Basin, fluid inclusion,PVTsim,trapping pressure.

Resin composition: An indicator of oil maturity as revealed by fourier transform ion cyclotron resonance mass spectrometry

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Petroleum Science 2023年第2期20卷 769-775页

作者： Tian Liang Zhao-Wen Zhan Guo-Xiang Wang Yan-Rong Zou State Key laboratory of organic geochemistry Guangzhou Institute of GeochemistryGuangzhouGuangdong510640China CAS Center for Excellence in Deep Earth Science GuangzhouGuangdong510640China University of Chinese Academy of Sciences Beijing100049China

A pyrolysis experiment was carried out on a Dongying Depression kerogen sample to separate the resin from the oil. Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) with a positive-ion detector was used to detect the relative proportional changes in the compounds of the resin. During the whole pyrolysis experiment, the relative ratio of resin exceed 10% of the soluble component at each temperature point. Five compounds were detected from the resin: N1, N1O1, N1O_(2), O1, and O_(2). To research the changes in the proportions of the compounds during pyrolysis clearly, these five compounds were divided into three classes: N1, N1Ox, and Ox. The N1 class has the largest proportion in resin at the beginning of the pyrolysis, while Ox class has the least proportion. And the relationship between the number and the molecular mass of three classes compound was researched. With increasing maturity, the proportion of N1 and the N1Ox class decreased rapidly, while the Ox class increased slowly. Through researching these resin compounds, it was found that an inversion in the proportions of above three compounds appeared at the end of the oil window. At the same time, we found that the DBE and carbon number of resin compounds have changed obviously during the pyrolysis: the DBE increased, while the carbon number decreased significantly. And the details of the change of each compound have been researched. This research extends our knowledge of judging the maturity of crude oil during the pyrolysis through the characteristics of compounds in resin and provides the new index based on resin for the evaluation of thermal evolution stage and hydrocarbon generation capacity of source rocks.

关键词： Resin Pyrolysis FT-ICR MS Heteroatom compound Maturity DBE

Suspended particulate and colloidal matter in natural waters

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Journal of Environmental Sciences 2000年第2期12卷 4-12页

作者： Ran, Yong Fu, Jia-Mo Sheng, Guo-Ying Beckett, R. Hart, B.T. State Key laboratory of organic geochemistry Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou 510640 China Water Studies Center Monash University Caulfield East Vic. 3145 Australia

The association of pollutants (nutrients, heavy metals and organic compounds) with colloidal and suspended particle matter(SPM) plays a dominant role in determining their transport, fate, biogeochemistry, bioavailability and toxicity in natural waters. A scheme for the fractionation and composition of colloidal and suspended particulate matter from river waters has been tested. Sieving, continuous flow centrifugation and tangential flow filtration were used to collect gram amounts of colloidal and particulate matters. The separation scheme was able to process large samples(100L), within reasonable times(1 day) and the apparatus was portable. The aquatic colloid was also separated with high resolution, and sized using sedimentation field\|flow fractionation technique. The mass\|based particle size distribution for the river water sample showed a broad size distribution between 0\^05 and 0\^4 μm with the maximum around 0\^14 μm. There was a systematic increase in the content of organic carbon, Mg, Ca, Na, Cu and Zn with decreasing particle size, highlighting the importance of the colloidal(<1 μm) fraction.

关键词： suspended particulate colloidal matter natural waters pollutants CLC number: X132 Document code: A

Kinetics of petroleum generation determined from multiple cold trap pyrolysis gas chromatography

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Chinese Science Bulletin 1997年第3期42卷 254-258页

作者： LIU Jinzhong and TANG Yongchun1. State Key laboratory of organic geochemistry, Guangzhou Institute of geochemistry, Chinese Academy of Science Guangzhou 510640, China 2. Chevron Petroleum Technology Company, La Habra, CA 90633-0446, USA State Key laboratory of organic geochemistry Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou China Chevron Petroleum Technology Company La Habra USA

THOUGH commercial Pyrolysis-GC is widely used to evaluate petroleum source rocks, its chromatogram composed of all compounds generated in the whole pyrolysis process cannot provide generating rates or activation energy distributions of individual component or compound groups. To overcome the limitation, a new technique, multi cold trap pyrolysis gas chromatography (MCTP-GC), has been developed by Chevron Petroleum Technology Compa-

关键词： organic geochemistry pyrolysis kinetics.

Mass balance calculation of the pyrolysates generated from marine crude oil:A prediction model of oil cracking gas resources based on solid bitumen in reservoir

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Chinese Science Bulletin 2007年第11期52卷 1532-1539页

作者： WANG TongShan GENG AnSong XIONG YongQiang GENG XinHua State Key laboratory of organic geochemistry Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou 510640 China Graduate University of Chinese Academy of Sciences Beijing 100049 China

Oil cracking gas plays an important role in the resources of natural gas in the basins with high and over mature marine source rocks in China. The prediction of the oil cracking gas resources becomes nec-essary and urgent in the gas exploration in these basins. A marine crude oil sample was pyrolyzed using sealed gold tubes system. The pyrolysates including gas,liquid and solid were quantitatively analyzed. Based on the pyrolysis data and kinetic calculation,the yield correlativity among gas,liquid and solid products was regressed with high correlative coefficients to establish a prediction model suitable for the resource estimation of oil cracking gas. The verification formula for this model was also established on the principle of mass conservation. The affecting factors and the application precondi-tions of this prediction model were discussed. This model would enlighten and provide some new ideas for the resource assessment of natural gas in the high and over mature marine carbonate source rock areas in China. It is expected to be valuable in gas exploration.

关键词：高温分解实验石油天然气故障预测相互关系

Evolution of Diagenetic Fluid of the Dawsonite-Bearing Sandstone in the Jiyang Depression,Eastern China

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Journal of Ocean University of China 2024年第1期23卷 80-98页

作者： LI Fulai MA Wenkuan ZHANG Chun WANG Kaining National Key laboratory of Deep Oil and Gas China University of Petroleum(East China)Qingdao 266580China laboratory for Marine Mineral Resources Qingdao National Laboratory for Marine Science and TechnologyQingdao 266071China Shandong Geological Exploration Institute of China Chemical Geology and Mine Bureau Jinan 250013China

Based on the petrology,isotope geochemistry and fluid inclusions analysis,we established the evolutionary mode of the diagenetic fluid of dawsonite-bearing sandstone in the Jiyang ***-bearing sandstone is characterized by double injection of CO_(2)and oil-gas in the Jiyang Depression that have experienced a relatively complex diagenetic fluid evolution *** diagenetic sequence of secondary minerals involves secondary enlargement of quartz,kaolinite,first-stage calcite,dawsonite,second-stage calcite,ferrocalcite,dolomite and *** charging in the dawsonite-bearing sandstone occurred at around 2.6–0 *** CO_(2)charging event occurred during Dongying tectonism,forming the Pingfangwang CO_(2)gas reservoir,which provided an abundant carbon source for dawsonite *** and oxygen isotopic compositions of dawsonite demonstrate that CO_(2)forming the dawsonite was of an inorganic origin derived from the mantle,and that water mediating the proc-ess during dawsonite precipitation was sequestered brine with a fluid temperature of 82℃.The evolutionary sequence of the diagenetic fluid in the dawsonite-bearing sandstone was:alkaline syngenetic fluids,weak alkaline fluids during organic acid forma-tion,acidic fluids in the early stage of CO_(2)injection,alkaline fluids in the late stage of CO_(2)injection,and weak alkaline fluids during oil and gas *** mode indicates an increase in-HCO_(3)because of the CO_(2)injection,and the loss of Ca^(2+)and Mg^(2+)due to the precipitation of carbonate ***,the evolutionary mode of diagenetic fluids is in good agreement with high HCO_(3)^(-),low Ca^(2+)and low Mg^(2+)composition of the present formation water in the dawsonite-bearing sandstone.

关键词： evolution of diagenetic fluid dawsonite CO_(2)injection and hydrocarbon charging mineral diagenetic sequence iso-topic geochemistry fluid inclusions