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organic-inorganic interaction Recorded by Polycyclic Aromatic Steranes in Continental Epithermal Ore Deposits

Acta Geologica Sinica(English Edition) 2023年第1期97卷 327-336页

作者： XU Huiyuan LIU Quanyou JIN Zhijun ZHU Dongya MENG Qingqiang LI Pengpeng ZHU Biqing State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development Beijing 100083China Petroleum Exploration&Production Research Institute SINOPECBeijing 100083China Institute of Energy School of Earth cand Space SciencesPeking UniversityBeijing 100871China

Continental epithermal ore deposits are commonly associated with sedimentary organic matter,oils or solid *** organics embedded in mineral deposits can convey valuable information of the ore ***,the extent to which the formation of ore minerals was recorded by organic compounds remains largely unknown,as also is how metal-rich ores interfere with the molecular proxies in the temperature regime envisaged for hydrothermal *** molecular compositional changes of various polycyclic aromatic steranes and polycyclic aromatic hydrocarbons and compounds derived from the Jinding Pb/Zn deposit,SW China provide new *** regular steranes are present as *** transformation from polycyclic aromatic steranes to unsubstituted polycyclic aromatic hydrocarbons is observed to show an increased trend with increasing hydrothermal alteration levels;this is consistent with the transformation from unsubstituted polycyclic aromatic hydrocarbons to heterocyclic ***(aromatization)of polycyclic biological compounds and hydrodecyclization(dearomatization)of polycyclic aromatic compounds are two important reaction pathways in hydrothermal systems with moderate *** detailed investigation of organicinorganic interactions of two groups of polycyclic compounds with metal-rich ores provides insights into the questions on how and to what extent the formation of Pb/Zn deposits can be recorded by *** work will improve our understanding of carbon reduction,oxidation or condensation in the deep Earth and the carbon exchange between the Earth's crust and mantle,and may shed light on the processes for ultra-deep hydrocarbon exploration.

关键词： petroleum resources organic-inorganic interaction biomarker polycyclic compounds hydrothermal environment

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interactions between hydrocarbon-bearing fluids and calcite in fused silica capillary capsules and geological implications for deeply-buried hydrocarbon reservoirs

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Science China Earth Sciences 2022年第2期65卷 299-316页

作者： Zihao JIN Guanghui YUAN Yingchang CAO Keyu LIU Yanzhong WANG Jianye SUN Xiluo HAO Ling ZHOU Yihan WEI Shuqi WU School of Geosciences China University of PetroleumQingdao 266580China Laboratory for Marine Mineral Resources Qingdao National Laboratory for Marine Science and TechnologyQingdao 266071China Qingdao Institute of Marine Geology China Geological SurveyQingdao 266071China

During the burial processes of deep/ultra-deep hydrocarbon reservoirs,the interactions between hydrocarbon-bearing fluids and reservoirs significantly affect the quality evolution of hydrocarbons and reservoirs;thus,this topic requires further *** this study,the continuous evolution and the coupling mechanisms in various anhydrous and hydrous nC_(16)H_(34)-(water)-(calcite)systems in fused silica capillary capsules(FSCCs)were investigated using laser Raman spectroscopy,fluorescence color analysis,and fluorescence spectroscopy,and the mineral alterations were analyzed using scanning electron microscopy(SEM).The experimental results show that extensive organic-inorganic interactions occur in the systems if water is present,and different inorganic components have different effects on hydrocarbon *** water promotes freeradical thermal cracking and steps oxidation,forming more low-molecular-weight hydrocarbons,CO_(2),and organic acids(e.g.,acetic acids)but suppresses the free-radical cross-linking,generating less high-molecular-weight ***,in the presence of CaCl_(2) water,the yields of hydrocarbon gases are lower than in the distilled water system because high concentrations of Ca ions inhibit the generation of free ***,which exhibit different surface reactivities in different fluid conditions,affect hydrocarbon degradation in different *** the anhydrous nC16H34-calcite system,calcites promote the generation of both hydrocarbon gases and high-molecular-weight *** contrast,in the hydrous nC16H34-distilled(CaCl_(2))watercalcite system,calcites promote the generation of hydrocarbon gases and suppress the generation of high-molecular-weight *** also reacts with organic acids via surface reactions to form secondary ***,except for the formation temperature and pressure,organic-inorganic interactions are controlled by multiple factors,such as the water saturation,water typ

关键词： Hydrocarbon-bearing fluids Calcite organic-inorganic interaction Fused silica capillary capsules Surface reaction

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Influence of hydrogen fugacity on thermal transformation of sedimentary organic matter:Implications for hydrocarbon generation in the ultra-depth

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Science China Earth Sciences 2022年第11期65卷 2188-2201页

作者： Jia WU Fujia JI Yuan WANG Bernhard M.KROOSS Kun HE Xiao JIN Qingyong LUO Yanan YANG Ningning ZHONG State Key Laboratory of Petroleum Resources and Prospecting China University of Petroleum(Beijing)Beijing 102249China College of Geoscience China University of Petroleum(Beijing)Beijing 102249China K&A Petrophysics Consulting Juelich 52428Germany PetroChina Research Institute of Petroleum Exploration&Development Beijing 100083China Development and Research Center National Geological Archives of ChinaChina Geological SurveyBeijing 100037China

Hydrocarbon generation from sedimentary organic matter(SOM)with an original net C oxidation state(OS,-1–-2)is a disproportionation reaction involving the transfer of internal(“organic”)hydrogen and producing oxidized C(up to OS=+4)and reduced C(down to OS=-4).The contribution of extrinsic(“inorganic”)hydrogen could lead to an increase of hydrocarbon yields,but mechanisms and potential sources are still unclear,although it is supported by some experimental *** this study,we have analyzed quantitatively the effect of increasing hydrogen fugacity on the hydrocarbon generation behavior of the Cambro-Ordovician Alum shale at 350℃and 40 *** fugacity in the experimental system was controlled by the magnetite-hematite(MH)*** experimental data confirm that a more reducing environment will increase overall hydrocarbon yields and depress CO_(2) *** elevated hydrogen fugacity was found to correlate with an increase in δ^(13)C isotopic composition of methane and a decrease of δ^(13)C values in CO_(2),ethane and *** demonstrates that elevated hydrogen fugacity constrained by water-rock reaction in sedimentary basins can enhance hydrocarbon generation by“hydrocracking”.This mechanism of hydrocarbon generation by organic-inorganic interactions might be ubiquitous in the deeper sections of sedimentary basins(approximately 4–10 km).Thus,it will extend the connotation of the current theory on petroleum *** level of hydrogen fugacity,constrained by water-rock reactions,increases with depth and may thus activate over-maturity sedimentary organic matter to produce more *** end of hydrocarbon generation will thus move to a greater depth than predicted by the traditional *** will be correlated to the capacity of the buffer system,which should,in consequence,be taken into account in petroleum exploration,similar to the hydrogen index(HI)of *** extension of the fundamental theory will help to enlarge the area of petro

关键词： Hydrous pyrolysis Thermal decomposition Magnetite-hematite redox buffer Hydrocarbon generation organic-inorganic interaction

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In-situ construction of grass-like hybrid architecture responsible for extraordinary corrosion performance: Experimental and theoretical approach

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Nano Materials Science 2024年第1期6卷 44-59页

作者： T.Suhartono F.Hazmatulhaq Y.Sheng A.Chaouiki M.P.Kamil Y.G.Ko Materials Electrochemistry Group School of Materials Science and EngineeringYeungnam UniversityGyeongsan38541Republic of Korea Research Center for Advanced Materials National Research and Innovation Agency(BRIN)South TangerangBanten15314Indonesia

Despite the engineering potential by the co-existence of inorganic and organic substances to protect vulnerable metallic materials from corrosive environments,both their interaction and in-situ formation mechanism to induce the nature-inspired composite remained less *** present work used three distinctive mercaptobenzazole(MB)compounds working as corrosion inhibitors,such as 2-mercaptobenzoxazole(MBO),2-mercaptobenzothiazole(MBT),and 2-mercaptobenzimidazole(MBI)in a bid to understand how the geometrical structure arising from O,S,and N atoms affected the interaction toward inorganic *** compounds that were used here to control the corrosion kinetics would be interacted readily with the pre-existing MgO layer fabricated by plasma *** phenomenon triggered the nucleation of the root network since MB compounds were seen to be adsorbed actively on the defective surface through the active sites in MB ***,the molecule with twin donor atoms adjacent to the mercapto-sites affected the facile growth of the grass-like structures with‘uniform’distribution via molecular self-assembly,which showed better corrosion performance than those with having dissimilar donor atoms with the inhibition efficiency(η)of 97%*** formation mechanism underlying nucleation and growth behavior of MB molecule was discussed concerning the theoretical calculation of density functional theory.

关键词： Nature-inspired composite organic-inorganic interaction Corrosion inhibitor Density functional theory Electrochemistry

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Effects of U-ore on the chemical and isotopic composition of products of hydrous pyrolysis of organic matter

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Petroleum Science 2017年第2期14卷 315-329页

作者： Yu-Wen Cai Shui-Chang Zhang Kun He Jing-Kui Mi Wen-Long Zhang Xiao-Mei Wang Hua-Jian Wang Chao-Dong Wu School of Earth and Space Sciences Peking University Beijing 100087 China Research Institute of Petroleum Exploration and Development (RIPED) Beijing 100083 China State Key Laboratory of Enhanced Oil Recovery Beijing 100083 China

In order to investigate the impact of U-ore on organic matter maturation and isotopic fractionation,we designed hydrous pyrolysis experiments on Type-II kerogen samples,supposing that the water and water–mineral interaction play a role.U-ore was set as the variable for ***,anhydrous pyrolysis under the same conditions was carried out as the control *** determination of liquid products indicates that the presence of water and minerals obviously enhanced the yields of C（15＋） and the amounts of hydrocarbon and nonhydrocarbon *** results may be attributed to waterorganic matter reaction in the high-temperature system,which can provide additional hydrogen and oxygen for the generation of gas and liquid products from organic *** is found that δD values of hydrocarbon gases generated in both hydrous pyrolysis experiments are much lower than those in anhydrous *** is more,δD values are lower in the hydrous pyrolysis with uranium ***,we can infer that water-derived hydrogen played a significant role during the kerogen thermal evolution and the hydrocarbon generation in our *** exchange was facilitated by the reversible equilibration between reaction intermediaries with hydrogen under hydrothermal conditions with uranium *** isotopic fractionations of hydrocarbon gases were somehow affected by the presence of water and the uranium *** increased level of i-C4/n-C4ratios for gas products in hydrous pyrolysis implied the carbocation mechanism for water-kerogen reactions.

关键词： organic-inorganic interaction Hydrous pyrolysis Stable isotopes U-ore Carbocation mechanism

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Effects of Deep Fluids on Hydrocarbon Generation and Accumulation in Chinese Petroliferous Basins

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Acta Geologica Sinica(English Edition) 2017年第1期91卷 301-319页

作者： ZHU Dongya LIU Quanyou JIN Zhijun MENG Qingqiang HU Wenxuan State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development Beijing 100083 China Petroleum Exploration and Production Research Institute of SINOPEC Beijing 100083 China Department of Earth Sciences Nanjing University Nanjing 210093 Jiangsu China

Deep fluids in a petroliferous basin generally come from the deep crust or mantle beneath the basin basement, and they transport deep substances（gases and aqueous solutions） as well as heat to sedimentary strata through deep faults. These deep fluids not only lead to large-scale accumulations of CO2, CH4, H2, He and other gases, but also significantly impact hydrocarbon generation and accumulation through organic-inorganic interactions. With the development of deep faults and magmatic-volcanic activities in different periods, most Chinese petroliferous basins have experienced strong impacts associated with deep fluid activity. In the Songliao, Bohai Bay, Northern Jiangsu, Sanshui, Yinggehai and Pearl Mouth Basins in China, a series of CO2 reservoirs have been discovered. The CO2 content is up to 99%, with δ-（13）C（CO2） values ranging from-4.1‰ to-0.37‰ and -3He/-4He ratios of up to 5.5 Ra. The abiogenic hydrocarbon gas reservoirs with commercial reserves, such as the Changde, Wanjinta, Zhaozhou, and Chaoyanggou reservoirs, are mainly distributed in the Xujiaweizi faulted depression of the Songliao Basin. The δ-（13）CCH4 values of the abiogenic alkane gases are generally -30‰ and exhibit an inverse carbon isotope sequence of δ-（13）C（CH4）δ-（13）C（C2H6）δ-（13）C（C3H8）δ-（13）C（C4H10）. According to laboratory experiments, introducing external H2 can improve the rate of hydrocarbon generation by up to 147% through the kerogen hydrogenation process. During the migration from deep to shallow depth, CO2 can significantly alter reservoir rocks. In clastic reservoirs, feldspar is easily altered by CO2-rich fluids, leading to the formation of dawsonite, a typical mineral in high CO2 partial pressure environments, as well as the creation of secondary porosity. In carbonate reservoirs, CO2-rich fluids predominately cause dissolution or precipitation of carbonate minerals. The minerals, e.g., calcite and dolomite, show some typical features, such as higher homogenization temperatures th

关键词： petroliferous basin deep fluids organic-inorganic interaction hydrogenation reservoir rock alteration hydrocarbon migration

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