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Study on the Difference of Hydrocarbon Generation and Transformation of Lacustrine Shale in China Based on the Kinetic Mechanism Method 认领 引用
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作者 Junqing Chen Kanyuan Shi +6 位作者 Kuiyou Ma Fujie Jiang Xiongqi Pang Hong Pang Zhuoheng Chen Guili Ma Yuying Wang 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2026年第3期870-893,共24页
Investigation of the dynamic transformation characteristics of hydrocarbon generation and evaluation of hydrocarbon potential and expulsion are of guiding significance for the evaluation of lacustrine shale oil and ga... Investigation of the dynamic transformation characteristics of hydrocarbon generation and evaluation of hydrocarbon potential and expulsion are of guiding significance for the evaluation of lacustrine shale oil and gas resources.A total of 1977 pyrolysis dataset points were collected from lacustrine shale samples selected from 202 wells across eight regions within five basins in China.The kinetic parameters were derived,and the original hydrogen index was obtained to identify the kerogen types.Subsequently,the original total organic carbon was estimated to analyse organic matter enrichment.Finally,the hydrocarbon generation,retention and expulsion characteristics of the lacustrine shales were compared.The results demonstrate that lacustrine shales in China exhibit different hydrocarbon generation,retention and expulsion characteristics,which are controlled by both basin lake type and primary productivity.Type I kerogens exhibit the largest hydrocarbon generation and retention amounts and the highest hydrocarbon expulsion efficiency.These kerogens also exhibit the narrowest hydrocarbon generation window and the earliest hydrocarbon expulsion.However,when the source rocks have a high sulphur content,hydrocarbon generation and expulsion occur earlier.Furthermore,when the source rock contains large amounts of terrestrial organic matter input,the hydrocarbon generation and expulsion windows broaden. 展开更多
关键词 hydrocarbon expulsion hydrocarbon generation hydrocarbon retention kerogen type lacustrine shale pyrolysis Rock-Eva
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Possible origin of deep hydrocarbons and transformation of complex petroleum systems within the Earth's crust 认领 引用
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作者 Vladimir Kutcherov Sergey Marakushev +1 位作者 Irina Plotnikova Kirill Ivanov 《Petroleum Science》 SCIE EI CAS CSCD 2026年第4期1675-1686,共12页
We demonstrate that the conditions established in laboratory settings—such as initial reaction products,thermobaric parameters,and redox environments—are indeed analogous to those that may exist in the Earth's u... We demonstrate that the conditions established in laboratory settings—such as initial reaction products,thermobaric parameters,and redox environments—are indeed analogous to those that may exist in the Earth's upper mantle.The experimentalresults confirmed thathydrocarbon fluids with diverse compositions can form within the upper mantle.This leads us to propose that thesefluids,generated through mantle-magmatic processes,can migrate from sub-crustal zones along deep faults and fractures and be injected under high pressure into the rock,ultimately forming oil and gas deposits.As the ascending fluid cools and the partial pressure of hydrogen decreases,it transforms into liquid oil and subsequently into polymeric insoluble carbonaceous matter(kerogen)within"oil source"rocks.Our findings provide thermodynamic support for the idea that phase transitions involving CO2,H2O,oil,and kerogens can occur not only in the kerogen→oil but also in the oil→kerogen direction.The reversibility of phase equilibrium allows us to approach these transitions from an inorganic perspective.Consequently,we can assert that kerogen may be a product of the dehydrogenation of oiland gas.Our experimental results,which investigate the distribution of vanadyl and nickel porphyrin complexes in oils from various productive horizons,support our hypothesis that biomarkers in oils may result from the dissolution and assimilation of dispersed organic matter by ascending,high-temperature hydrocarbon fluids,rather than serving as definitive evidence of a biogenic origin. 展开更多
关键词 Hydrocarbon origin Abiogenic hydrocarbons Oil Kerogen Mantle Biomarkers
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Microporous Polymer Membranes for the Separation of Hydrocarbon Mixtures 认领 引用
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作者 Jun-Kai Fang Kang Peng +2 位作者 Xin-Chi Ma Zheng-Jin Yang Tong-Wen Xu 《Chinese Journal of Polymer Science》 SCIE EI CAS CSCD 2026年第5期1307-1329,I0009,共23页
Crude oil has long been the"black gold"of the global economy,and its fractionation relies on thermal distillation,a highly energy-intensive process.In contrast,crude oil fractionation via membrane separation... Crude oil has long been the"black gold"of the global economy,and its fractionation relies on thermal distillation,a highly energy-intensive process.In contrast,crude oil fractionation via membrane separation can operate under mild conditions,avoiding phase transitions,and thereby substantially reducing the energy consumption associated with thermal separation processes.Numerous microporous polymer membranes have been developed to target the fractionation of oil mixtures through precise molecular design and structural modulation for the selective separation of hydrocarbon compounds.However,the intrinsic trade-off between permeance and selectivity remains a core bottleneck limiting their advancement.Herein,we summarize the synthetic strategies for microporous polymer membranes,focusing on tailored pore structures,anti-swelling capabilities,and selective transport of hydrocarbon compounds across these membranes.The performance of representative materials for practical crude oil fractionation was also highlighted.We also outline critical unresolved challenges,including cost-efficient largescale fabrication,long-term stability under harsh crude oil environments,and further optimization of the permeance-selectivity balance,issues that must be addressed to promote the deployment of microporous polymer membranes. 展开更多
关键词 Microporous polymer Membrane separation Trade-off Hydrocarbon separation Crude oil separation
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Risk assessment and environmental influencing factors of urinary polycyclic aromatic hydrocarbons metabolites in pregnant women in Zunyi,China 认领 引用
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作者 Jing Yang Jing Jiang +9 位作者 Linfei Wu Pei Xu Nian Wu Rui Yu Yanling Xiao Xingting Zheng Rong Zeng Yuanzhong Zhou Yan Xie Xubo Shen 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2026年第1期617-623,共7页
Despite the widespread presence and frequent detection of polycyclic aromatic hydrocarbons(PAHs)in various aspects of life,there is limited research on their exposure levels in pregnant women and cumulative exposure f... Despite the widespread presence and frequent detection of polycyclic aromatic hydrocarbons(PAHs)in various aspects of life,there is limited research on their exposure levels in pregnant women and cumulative exposure from the living environment.This study included 1311 women in late pregnancy from the Zunyi birth cohort and measured the urinary concentrations of 10 hydroxylated PAH metabolites(OH-PAHs).Risk assessment was conducted based on the estimated daily intake to calculate the hazard quotient and hazard index(HI).A linear regression model was used to analyze the relationship between creatinine-adjusted OH-PAHs concentrations and living environment and lifestyle factors,while principal component analysis was applied to trace the sources of PAHs exposure.1-OHPYR was detected in all participants’urine,with naphthalene metabolites having the highest concentrations among creatinine-adjusted PAHs.OH-PAHs concentrations were associated with housing type,room number,cooking frequency,household size,exercise frequency,fuel type,distance from main road,and drinking water source.Pregnant women using traditional fuels and living in bungalows had higher health risks than those using clean energy and living in buildings.Those living within 100 m of a main road had higher HI than those farther away.Coal combustion was identified as the primary source of PAHs exposure.The study emphasizes the importance of reducing PAHs exposure,especially for pregnant women living in polluted environments.It recommends public health interventions such as improving indoor ventilation and providing clean energy to reduce related health risks. 展开更多
关键词 Polycyclic aromatic hydrocarbons Pregnant women Environmental factor Daily intake estimation Risk assessment
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Association between polycyclic aromatic hydrocarbons exposure and gestational hypertension:Insights from global and dose metabolomics analysis 认领 引用
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作者 Jin Chen Yiwei Fang +4 位作者 Borui Sun Ying Xu Wanyi Chen Kai Zhao Huiping Zhang 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2026年第3期658-665,共8页
Polycyclic aromatic hydrocarbons(PAHs)are widespread pollutants from incomplete combustion of organic materials,linked to various health issues and pregnancy complications.This study explored the relationship between ... Polycyclic aromatic hydrocarbons(PAHs)are widespread pollutants from incomplete combustion of organic materials,linked to various health issues and pregnancy complications.This study explored the relationship between PAH metabolites and gestational hypertension.Urine samples from 118 normal pregnant women and 40 with gestational hypertension were analyzed.In vitro experiments using human trophoblast cells(HTR-8/SVneo)exposed to these metabolites assessed their effects on cellular metabolism.Comprehensive metabolomics analysis was performed using Tidymass and DRomics to integrate global and dose-response metabolomics data.Results showed higher levels of 1-hydroxypyrene(1-OHPYR)and 9-Hydroxyphenanthrene(9-OHPHE)linked to gestational hypertension,inhibiting trophoblast cell invasion and migration.Identified markers include Isobutyryl-L-carnitine,methyl-3-hydroxybutyric acid,threonine,and glutamic acid for 1-OHPYR,and phosphocreatine for 9-OHPHE.This study highlights the connection between PAH metabolites and gestational hypertension,suggesting potential biomarkers and mechanisms.Future research should confirm these findings and explore prevention and treatment strategies. 展开更多
关键词 Polycyclic aromatic hydrocarbons Gestational hypertension Dose-response 1-hydroxypyrene 9-Hydroxyphenanthrene
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A machine learning-driven interpretative framework for reconstructing hydrocarbon evolution in hybrid petroleum systems 认领 引用
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作者 Ke-Yu Tao Jian Cao +1 位作者 Yu-Ce Wang Wan-Yun Ma 《Petroleum Science》 SCIE EI CAS CSCD 2026年第5期2587-2598,共12页
The genetic identification of hydrocarbons in complex hybrid petroleum systems remains challenging due to overlapping geochemical signatures caused by multi-source inputs and superimposed geological processes.Traditio... The genetic identification of hydrocarbons in complex hybrid petroleum systems remains challenging due to overlapping geochemical signatures caused by multi-source inputs and superimposed geological processes.Traditional biomarker-based methodologies often struggle to decouple thesenonlinear interactions,leading to interpretive uncertainties in source correlation,thermal maturity assessment,and secondary alteration characterization.This study introduces an unsupervised machine learning framework leveraging manifold learning to resolve these challenges within the hybrid petroleum system of the eastern Junggar Basin.We employed Uniform Manifold Approximation and Projection(UMAP)to analyze high-dimensional molecular fingerprints of hydrocarbons.This approach allowed us to systematically disentangle the genetic signals influenced by multiple factors,includingsource material,thermal evolution,mixing,biodegradation,and migration-induced phasefractionation.Results identify two primary oil families:Permian-derived and Jurassic-sourcedoils,each exhibiting unique evolutionary pathways shaped by differential thermal maturation and post-generationalterations.Spatial mapping of these genetic types reveals systematic trends in hydrocarbon accumulation,highlighting preferential migration pathways and high-potential exploration targets.This workflow not only advances the interpretation of hybrid petroleum systems but also establishes a transferable framework for optimizing exploration strategies in geochemically complex basins.Theintegration of machine learning with petroleum geochemistry provides a promising pathway to reconcile multi-proxy datasets,reduce interpretive subjectivity,and enhance predictive accuracy in hydrocarbon genetic studies. 展开更多
关键词 Machine learning UMAP Geochemistry Hydrocarbons Hybrid petroleum system Junggar Basin
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Data-driven intelligent analysis of hydrocarbon generation kinetics and differential characteristics during pyrolysis of coal macerals 认领 引用
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作者 Yijie Wen Zongsen Yao +5 位作者 Fan Yang Yi Cui Shouqing Yan Bin Yu Zijian Zhang Shu Tao 《International Journal of Coal Science & Technology》 SCIE EI CAS CSCD 2026年第2期427-447,共21页
The heterogeneity of macerals represents a key challenge to accurately evaluating the hydrocarbon generation potential of coal.Conventional methods often overlook these differences,leading to biased understanding of i... The heterogeneity of macerals represents a key challenge to accurately evaluating the hydrocarbon generation potential of coal.Conventional methods often overlook these differences,leading to biased understanding of its hydrocarbon generation characteristics.Therefore,this study integrates maceral identification,thermal simulation experiments,and machine learning algorithms to develop the extreme gradient boosting(XGBoost)prediction models for the yields of gaseous and liquid hydrocarbons.This approach enables enabling quantitative characterization of the hydrocarbon generation behavior of different macerals and identification of their primary controlling factors of coal in Xishanyao(J2x)Formation of Taibei Sag,China.The results indicate that the correlation coefficients of the prediction models for gaseous and liquid hydrocarbon yields are 0.98 and 0.78,respectively,and the difference in prediction accuracy between the two productions arises from differences in the primary controlling factors of hydrocarbon generation.SHAP and ANOVA analyses indicate that temperature is the primary controlling factor for gaseous hydrocarbon generation,whereas liquid hydrocarbon yields are synergistically controlled by temperature and macerals type.Among the macerals,sporinite is the favorable oil-prone component,while cutinite is characterized by“early oil and late gas.”Collotelinite is the principal gas-prone component,whereas collodetrinite and corpogelinite display relatively balanced potential for oil and gas.The differentiated hydrocarbon generation characteristics of the various macerals is essentially governed by differences in their molecular structures.The aliphatic chain structures primarily control oil generation,aromaticity governs gas generation,and bond types determine the distribution of the hydrocarbon generation window.Based on the above results,the study further delineates three types of favorable hydrocarbon-generating zones,namely Class Ⅰ and Class Ⅱ oil-gas co-generation zones and Class Ⅱ oil-generating zones. 展开更多
关键词 Taibei Sag Maceral Hydrocarbon generation kinetics Machine learning
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Carbon isotopes of asphaltene-occluded hydrocarbons:A proxy for bitumen vein source identification in northwest Sichuan Basin,China 认领 引用
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作者 Peng Fang Jia Wu +6 位作者 Xue-Min Xu Bin Shen Wei-Lin Sun Xiao Jin Feng Chen Ning-Ning Zhong Ming-Hui Zhou 《Petroleum Science》 SCIE EI CAS CSCD 2026年第4期1636-1649,共14页
The Lower Cambrian bitumen veins in northwestern Sichuan Basin originated from Precambrian paleooil reservoirs,yet the severe alterations of bitumen and high maturity of potential source rocks challenge conventional o... The Lower Cambrian bitumen veins in northwestern Sichuan Basin originated from Precambrian paleooil reservoirs,yet the severe alterations of bitumen and high maturity of potential source rocks challenge conventional oil-source correlation.In this study,we focus on analyzing the stability of carbon isotopic compositions in asphaltene-occluded hydrocarbons to reveal their preservation of original organic signatures.Asphaltenes from the solid bitumen were investigated through gold tube closedsystem thermal simulation experiments(300–400℃).Free saturated hydrocarbons in raw samples exhibit 13C-enrichment(δ13C=-31.3‰)due to biodegradation,while thermal simulation experiments reveal progressive 13C-depletion of free saturated hydrocarbons(Δδ13C=-4.7‰)caused by kinetic isotope effects during thermal cracking.In contrast,asphaltene-occluded saturated hydrocarbons maintain exceptionalδ13C stability(-28.5‰±0.2‰)across the same stages,demonstrating complete protection by macromolecular shielding,and adsorbed hydrocarbons display intermediate behavior with moderateδ13C shifts,indicating partial shielding at asphaltene surfaces.Biomarker distributions(C27-dominant steranes,n-alkane bimodality,and n-alk-(1)-enes)in occluded hydrocarbons probably preserve original signatures unaffected by secondary alterations.The combinedδ13C signature(within the-26‰to-31‰range characteristic of shallow-water Doushantuo Formation)and biomarker evidence(consistent with Precambrian eukaryotic algal contribution)in occluded hydrocarbons conclusively identify the Ediacaran Doushantuo Formation as the bitumen source.These results demonstrate that asphaltene nanoaggregates effectively shield occluded components from secondary alterations and thermal maturation to a certain extent,providing reliable proxies for Precambrian oil-source correlation in altered reservoirs. 展开更多
关键词 Bitumen veins Asphaltenes Adsorbed/occluded hydrocarbons Carbon isotopes Organic matter source Sichuan Basin
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Assessment of shale hydrocarbon evaporative loss during exposure:Insights from online low-field nuclear magnetic resonance observations in the Qingshankou Formation,Songliao Basin,China 认领 引用
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作者 Xue-Ning Qi Hua Tian +3 位作者 Xiao-Mei Wang Ming-Hao Wu Yu-Ke Liu Shui-Chang Zhang 《Petroleum Science》 SCIE EI CAS CSCD 2026年第3期1053-1065,共13页
Understanding the evaporative loss of shale oil is critical for the shale oil resources assessment.However,previous studies have largely neglected the rapid evaporative loss of shale oil that occurs immediately after ... Understanding the evaporative loss of shale oil is critical for the shale oil resources assessment.However,previous studies have largely neglected the rapid evaporative loss of shale oil that occurs immediately after drill cores are retrieved to the surface at the well site.Thus,the factors influencing the evaporative loss of shale oil during thermal evolution remain inadequately explored.In this study,closed-system pyrolysis experiments were carried out to the artificially mature Qingshankou Formation shales.Subsequently,low-field nuclear magnetic resonance(LF-NMR)techniques were utilized to monitor the variations in oil content of the shales under different exposure times.Our experimental approach successfully reconstructed the entire evaporative loss process of shale oil,spanning from its original subsurface location to the well site,from the well site to the laboratory,and ultimately to long-term core storage.We find that the maximum loss of shale oil reaches approximately 10%within the first 10 h following the retrieval of drill cores from the subsurface to the ground,followed by a gradual deceleration,and the maximum loss ranges from 11%to 89%.As thermal maturity increases to a range of Ro=0.89%–1.20%,the loss proportion of shale oil shows a decreasing trend,which can be attributed to the reduction in total organic carbon(TOC)content.It is worth mentioning that the loss proportion of shale oil exhibits a continuous increasing trend at the thermal range of 1.20%–1.75%.At this stage,the hydrocarbon composition(C6–C14/C15+ratio)may be the mainly controlling factors for the shale oil loss proportion,while TOC content and nanopore volume serve as secondary factors.Our analyses reveal that hydrocarbon evaporative loss of shale oil is complex and involves various factors,especially the first 10 h during the transfer of the shale from its in-situ reservoir to the surface at the well site,which is critical to the understanding of shale oil occurrence and accurate resource assessment. 展开更多
关键词 Evaporative hydrocarbon loss Shale oil Songliao Basin Low-field nuclear magnetic resonance Qingshankou Formation
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Observations of polycyclic aromatic hydrocarbons at Changbai Mountain in Northeast Asia:Characteristics,transboundary transport,and health impacts 认领 引用
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作者 Ye Shan Yifan Li +16 位作者 Lanxin Zhang An’an Qi Yujiao Zhu Yanbin Qi Lingxiao Yang Liubin Huang Jiangshan Mu Mingxuan Liu Hongyong Li Lingli Zhang Yufei Wang Ziyi Wang Hengqing Shen Yuqiang Zhang Xinfeng Wang Likun Xue Wenxing Wang 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2026年第7期557-565,共9页
Polycyclic aromatic hydrocarbons(PAHs)constitute a significant class of environmental hazards in the atmosphere,posing considerable risks to human health owing to their mutagenic,carcinogenic,and persistent nature.Alt... Polycyclic aromatic hydrocarbons(PAHs)constitute a significant class of environmental hazards in the atmosphere,posing considerable risks to human health owing to their mutagenic,carcinogenic,and persistent nature.Although some studies have focused on PAHs in human-impacted areas,the characteristics and sources of PAHs in remote regions,such as high-altitude atmospheres,remain to be clarified.During the summer of 2021,we conducted intensive field measurements at the summit of Changbai Mountain(2623 m above sea level),the highest peak in Northeast Asia.Eighteen PAH species were detected in the collected PM₂.₅samples,and their chemical compositions,temporal variations,long-range transport,and associated health risks were analyzed.The average PAH concentrations were 0.92±0.36 ng/m³,dominated by compounds containing 2–3 and 5–7 aromatic rings.Backward trajectory analysis underscored the influence of long-range transport on PAH levels at Changbai Mountain,with the air masses originating from the Korean Peninsula characterized by high PAH concentrations.Major sources of PAHs included biomass and coal combustion,vehicle emissions,and oil/gas/petroleum and diagenetic processes.The estimated health risks were below the threshold set by the World Health Organization,indicating minimal carcinogenic risk from atmospheric PAHs at Changbai Mountain.Although this study was conducted only during the summer season,it establishes critical baseline data on transboundary PAH transport patterns in Northeast Asia.These findings provide valuable insights into the long-range transport,sources,and potential health risks of environmental hazards in Northeast Asian regional background atmosphere,and highlighting the necessity for future investigations encompassing seasonal cycle dynamics. 展开更多
关键词 Polycyclic aromatic hydrocarbons(PAHs) Changbai Mountain Health risk assessment Transboundary transport Northeast Asia
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Cenozoic morphological evolution of the Tanintharyi Shelf carbonate platform,Andaman Sea Basin:Implications for hydrocarbon reservoir potential 认领 引用
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作者 Xi-Wu Luan Thanuja D.Raveendrasinghe +1 位作者 Zi-Jie Wang Li-Shuang Feng 《Petroleum Science》 SCIE EI CAS CSCD 2026年第6期3074-3090,共17页
The Tanintharyi Shelf in the Andaman Sea Basin hosts a significant yet largely underexplored Cenozoic carbonate platform with substantial hydrocarbon potential.This study utilizes an integrated analysis of high-resolu... The Tanintharyi Shelf in the Andaman Sea Basin hosts a significant yet largely underexplored Cenozoic carbonate platform with substantial hydrocarbon potential.This study utilizes an integrated analysis of high-resolution 2D and 3D seismic reflection data,well data,and regional stratigraphic information to elucidate the morphological evolution of this platform and assess its implications for hydrocarbon reservoirs.The findings reveal that the platform started in the Early Miocene as isolated patch reefs on fault-bounded structural highs,eventually evolving into an asymmetric,westward-dipping rimmed shelf.Its development was influenced by the interaction of syn-sedimentary tectonics,which created accommodation space and a paleotopography that shielded the shelf from clastic influx,along with eustatic sea-level fluctuations that caused cycles of sediment buildup,subaerial exposure(leading to karstification),and back-stepping.Ultimately,the platform was drowned and buried during the Middle to Late Miocene due to accelerated post-rift subsidence combined with increased siliciclastic input,the latter driven by the Neogene uplift of the Tibetan Plateau.The reservoir potential varies across the platform,with the highest concentrations in wave-resistant reefal margin facies and potential dolomitized zones on paleo-highs,where primary porosity was enhanced by meteoric diagenesis.However,reservoir quality is compartmentalized due to tight cementation and mud-rich intervals.The widespread presence of gas chimneys and pockmarks indicates that the platform functions both as a reservoir and a conduit for fluid migration.Therefore,this study establishes a predictive tectonostratigraphic framework,emphasizing that successful exploration in this complex environment requires high-resolution mapping of facies boundaries,diagenetic features,and fault architecture,combined with seal integrity analysis.The findings offer a new model for understanding the evolution of carbonate reservoirs in tectonically active,rift-margin settings worldwide. 展开更多
关键词 Andaman Sea Basin Tanintharyi Shelf Carbonate platform Seismic geomorphology Hydrocarbon reservoir heterogeneity
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Hydrocarbon enrichment patterns and exploration targets in the Paleogene Liushagang Formation,Wushi Sag,Beibuwan Basin,China 认领 引用
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作者 WU Keqiang HU Desheng +2 位作者 YOU Junjun MAN Xiao XU Shouli 《Petroleum Exploration and Development》 SCIE 2026年第2期299-310,共12页
The Paleogene Liushagang Formation in the Wushi Sag of the Beibuwan Basin is characterized by dispersed hydrocarbon distribution,small-scale residual exploration targets and large burial depth.Based on data from drill... The Paleogene Liushagang Formation in the Wushi Sag of the Beibuwan Basin is characterized by dispersed hydrocarbon distribution,small-scale residual exploration targets and large burial depth.Based on data from drilling,laboratory experiments,and geophysic analysis,this study systematically investigates the hydrocarbon accumulation conditions and enrichment patterns in the Liushagang Formation.The key findings are obtained in five aspects.First,the structural evolution of the sag involved three distinct stages:early faulting,mid-stage detachment deformation and late adjustment,governed by an“extension–detachment–strike-slip”composite fault system that controlled basin subsidence,depocenter migration and sedimentary environment evolution.Second,three principal source rock intervals in the Eocene Liushagang Formation,concentrated in the southern East Sub-sag under the control of the No.7 Fault Zone,are characterized by considerable thickness and high quality,with the oil shale in the lower part of the second member of Liushagang Formation(lower Liu-2 Member)being the most prolific,providing a robust resource foundation in the sag.Third,four reservoir–seal assemblages are identified,corresponding to three hydrocarbon migration systems:direct source–reservoir contact,fault–sandbody coupling,and fault–structural ridge–sandbody stepwise composite networks.Fourth,three accumulation models are established:“young source,old reservoir”with lateral stepwise migration,“self-sourced and self-stored”intra-source enrichment,and“lower source–upper reservoir”with vertical migration.Fifth,exploration priorities are further delineated,highlighting deep fault-block traps in the central zone of the East Sub-sag,intrasag lithologic traps,and bedrock buried-hill targets with direct source–reservoir connectivity,all demonstrating significant resource potential. 展开更多
关键词 hydrocarbon enrichment pattern accumulation model exploration direction Paleogene Liushagang Formation Wushi Sag Beibuwan Basin
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Multi-source hydrocarbon accumulation in the faulted and deeply depressed Tangdong area,Qikou Sag,Bohai Bay Basin 认领 引用
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作者 Xiugang Pu Guochao Xia +6 位作者 Jiangchang Dong Zhannan Shi Wenzhong Han Qianru Shi Wei Zhang Yueqi Dong Xiongying Dong 《Energy Geoscience》 EI CAS CSCD 2026年第2期85-100,共16页
Based on organic geochemical analysis data,this study examined the characteristics of multi-source hydrocarbon accumulation in the Tangdong area of Qikou Depression,Bohai Bay Basin.The results indicate that the Tangdo... Based on organic geochemical analysis data,this study examined the characteristics of multi-source hydrocarbon accumulation in the Tangdong area of Qikou Depression,Bohai Bay Basin.The results indicate that the Tangdong area contains four source rock sequences:the third member of the Dongying Formation(Ed3),the middle and lower sub-members of the first and third member of Shahejie Formation(Es 1M,Es 1L,Es 3).Both the salinity of sedimentary water bodies and the contribution of bacteria in the four source rock sequences gradual increase in the order of Es 3,Es 1M,Es 1L and Ed3,as indicated by the Ga/C30H,ETR,sterane/C30 hopane,C24TeT/C26TT,C23TT/C30H,and the carbon isotope data of group components.Additionally,certain quantities of 4-methylsterane have been detected in source rocks in the Es 3,Es 1M,and Ed3,suggesting the special contribution of dinoflagellates to these source rocks.Based on biomarker parameters and carbon isotope data,the crude oil can be categorized into classes A to D,which show complex multi-source accumulation characterized by different sources in the same well and even in the same layer.Class A crude oil occurring in the higher part of the Ed3 originates from source rocks in the Es 1L and Es 3.Class B oil existing in the lower part of the Ed3 is derived from source rocks in the Ed3.Class C oil found in the Es 1U is sourced from source rocks in the Es 1M.Class D oil present in the Es 1L is contributed indigenously by the source rocks in the Es 1L,establishing this unit as a lithologic hydrocarbon reservoir with source rocks and reservoirs in the same layer.Under the guidance of the understanding of multi-source hydrocarbon accumulation,currently,three wells have been drilled,all yielding satisfactory outcomes. 展开更多
关键词 Oil-source rock correlation Multi-source hydrocarbon accumulation Petroleum geochemistry Source rock Deeply depressed area Qikou sag Exploration well emplacement
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Hydrocarbon accumulation characteristics and exploration progress of the Triassic Jiucaiyuan Formation in the eastern Fukang Sag,Junggar Basin,NW China 认领 引用
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作者 KANG Jilun LI Shilin +9 位作者 WANG Lilong GAO Gang ZHANG Wei MA Qiang JIA Guoqiang YU Haiyue ZHANG Qi YU Xiaohua FU Guobin QING Zhong 《Petroleum Exploration and Development》 SCIE 2026年第2期359-371,共13页
Based on data from drilling,logging,seismic surveys and tests,a systematic study was conducted on the petroleum geological characteristics and hydrocarbon accumulation features/models of the Triassic Jiucaiyuan Format... Based on data from drilling,logging,seismic surveys and tests,a systematic study was conducted on the petroleum geological characteristics and hydrocarbon accumulation features/models of the Triassic Jiucaiyuan Formation in the eastern Fukang Sag of the Junggar Basin.The favorable exploration targets were identified.First,the highly mature,high-quality saline lacustrine source rocks developed in the Permian Lucaogou Formation in the eastern Fukang Sag are characterized by continuous and efficient hydrocarbon expulsion over multiple stages,providing a critical material foundation for large-scale hydrocarbon accumulation in the Jiucaiyuan Formation.Second,the Jiucaiyuan Formation,a dual source-sink system,represents a distal,large-scale braided river delta sand bodies originated from the Karamaili Mountain,with well-preserved intergranular pores and fractures,providing good reservoir conditions.Third,the middle and upper parts of the Jiucaiyuan Formation contain thick,high-quality mudstone caprocks.Source-connected faults and associated fracture systems serve as effective pathways for hydrocarbon migration and accumulation.The continuous hydrocarbon generation and pressurization conditions are favorable for the formation of ultra-high-pressure oil and gas reservoirs.Fourth,the effective spatial configuration of various accumulation elements constitutes a hydrocarbon accumulation model characterized by“lower generation,upper accumulation,fault transportation,sandbody-fracture storage,and overpressure-driven enrichment”,resulting in the current structural-lithologic reservoirs within the Jiucaiyuan Formation.Fifth,the most favorable exploration targets in Fudong are areas adjacent to the hydrocarbon generation center of the Lucaogou Formation,with superior structural settings and superimposed development of faults and sandbodies,corresponding to the prospective trap area of 263 km2and the possible resources amounting to 1.68×10~8 t.Sixth,the zones with efficient coupling of five elements(source,fault,sandbody,fracture and pressure)are recommended as preferential targets for seeking additional large-scale petroleum discoveries in the Jiucaiyuan Formation.The renewed major breakthrough in the Triassic petroleum exploration in the Fukang Sag,represented by a high oil flow rate of 56.16 m3/d at Well Fukang-2 during test,has underscored its significant potential and promising prospects for large-scale exploration.The research findings on hydrocarbon accumulation are expected to promote a multi-layer three-dimensional exploration pattern in the eastern part of the Junggar Basin and have an important strategic significance for oil and gas exploration in the Triassic across the basin. 展开更多
关键词 Junggar Basin Fukang Sag Triassic Jiucaiyuan Formation structural-lithologic trap hydrocarbon accumulation condition Well Fukang-2
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Distribution of polycyclic aromatic hydrocarbons(PAHs)along altitude gradient in the soil from the roof ridge mountains in mid-latitude regions of Central China 认领 引用
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作者 Tianpeng Hu Weijie Liu +8 位作者 Yao Mao Mingming Shi Mingkai Du Ying Liu Jiayong Mo Deqing Yixi Jiaquan Zhang Xinli Xing Shihua Qi 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2026年第2期155-165,共11页
Studies on the elevation gradient distribution of polycyclic aromatic hydrocarbons(PAHs)have mainly focused on high-altitude regions like the Tibetan Plateau.Investigation of the PAHs distribution in Shennongjia regio... Studies on the elevation gradient distribution of polycyclic aromatic hydrocarbons(PAHs)have mainly focused on high-altitude regions like the Tibetan Plateau.Investigation of the PAHs distribution in Shennongjia region and the effects of total organic carbon(TOC),black carbon(BC)and elevation gradient on PAHs distribution are of great practical significance for protecting the Tibetan Plateau’s environment.This study collected soil and peat samples across varying vegetation types and altitudes in Shennongjia.Results showed that theΣ16PAHs concentrations ranged from 15.44 to 199.13 ng/g in surface soil and 300.15 to 555.52 ng/g in surface peat,respectively,both dominated by low molecular weight PAHs(LMW-PAHs),and the distribution line of PAHs in the soil of Shennongjia area is 1500-1700 m.Above 1700 m,PAH concentrations increased with altitude,influenced significantly by TOC and BC,though dependence on BC was stronger than on TOC.However,the dependence of PAHs on BC is higher than TOC.Through soil-air partition coefficient(KSA)and soil fugacity,it is found that the absorption capacity of PAHs is mainly concentrated in Dajiuhu,which is equivalent to a"trap".The ILCRs induced by PAHs in the soil of Shennongjia area are within the safe range.Shennongjia serves as a barrier,preventing pollutant transport from central emission areas to the Tibetan Plateau.Thus,amid tourism development,addressing traffic-related PAH sources,promoting green energy,and controlling air pollutants in central emission areas are vital for ecological protection in Shennongjia and the Tibetan Plateau. 展开更多
关键词 Polycyclic aromatic hydrocarbons(PAHs) Altitude distribution Source identification Health risk Shennongjia forestry district
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High-resolution electrical resistivity imaging of crust beneath Helishan mountains in Hexi Corridor,implications for basin-range coupling and hydrocarbon generation mechanism 认领 引用
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作者 Xian-zhong Luo Sheng Xia +4 位作者 Jun-lu Wang Yao-tian Yin Hui Chen Zhan Liang Long-long Li 《Applied Geophysics》 SCIE CSCD 2026年第2期527-540,866,共14页
The Helishan uplift,which was formed during the late Cretaceous,is the northern boundary of the Jiudong basin.It has played a critical role in controlling basin formation and evolution due to the expansion of the nort... The Helishan uplift,which was formed during the late Cretaceous,is the northern boundary of the Jiudong basin.It has played a critical role in controlling basin formation and evolution due to the expansion of the northeastern Tibetan Plateau and therefore hydrocarbon generation,making it a subject of signifi cant research interest.In this study,a north-south-trending MT profi le was used to obtain a high-resolution crustal resistivity model beneath the Helishan uplift and its adjacent regions.Beneath the Helishan south fault,a southdipping,conductive zone extends from the surface to depths exceeding 10 km.This feature is interpreted as a decollement-fracture zone between the Cretaceous strata and the underlying basement,fi lled with conductive materials.It supports the debated deep south-dipping feature of this fault.Beneath the outcropping Cretaceous strata,a resistive zone dips southward on the southern side and northward on the northern side of the Helishan,respectively,which may represent compacted Cretaceous carbonate rocks or hydrocarbon source rocks in the Jiudong basin.They are suggested to have undergone decoupling and fracturing due to Cenozoic thrustnappe tectonics,potentially creating space for hydrocarbon generation and storage.On the northern side of the Helishan uplift,a north-dipping,conductive zone is observed beneath the Moshiliang-Jintananshan fault,possibly representing stratigraphic boundary or fracture zone.Together with the south dipping conductive zone beneath the Helishan south fault,these features may jointly represent the two wings of an anticline with opposing dips.The Cretaceous strata,particularly their fractured lower sections,serve as an available space for both hydrocarbon generation and storage.Since the Tertiary,under intense northward thrust-nappe compression from the Qilian Orogenic Belt,these strata have been overlain by conductive cap rocks,jointly controlling hydrocarbon accumulation. 展开更多
关键词 Jiuquan Basin North Qilian orogenic belt unconventional hydrocarbon northeastern margin of the Tibetan Plateau.
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Numerical Study on Condensation Flow and Heat Transfer of Hydrocarbon Mixtures in Inclined Tubes under Static and Swaying Conditions 认领 引用
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作者 Xianshi Fang Zexian Guo +1 位作者 Kaihong Tang Guanzhu Ren 《Frontiers in Heat and Mass Transfer》 EI CAS 2026年第2期378-394,共17页
To investigate the complex phase change behavior in two-phase condensation flow of hydrocarbon mixtures in inclined tubes,a numerical model was developed in Fluent using the Volume of Fluid method combined with the Le... To investigate the complex phase change behavior in two-phase condensation flow of hydrocarbon mixtures in inclined tubes,a numerical model was developed in Fluent using the Volume of Fluid method combined with the Lee phase change model.A mixing effect correction was incorporated to enhance the simulation accuracy,and its impact on the flow and heat transfer characteristics was systematically evaluated.Numerical simulations were performed and subsequently corrected for mixing effects;the final results show good agreement with classical experimental data.The average deviation of the heat transfer coefficient is-0.76%,while that of the frictional pressure drop is 4.5%.Furthermore,by introducing the swaying-motion equation into the model,the effects of different swaying periods and amplitudes on the heat transfer under swaying conditions are investigated.The results show that shorter swaying periods and larger swaying amplitudes lead to more pronounced fluctuations in the heat transfer coefficient.Within the parameter range considered in this study,the influence on the time averaged heat transfer coefficient does not exceed 25%.This study provides a solid theoretical and data foundation for the design of relevant condensation heat exchangers,thereby supporting the development of the offshore LNG industry and enhancing energy security. 展开更多
关键词 Hydrocarbon refrigerants condensation heat transfer coefficient frictional pressure drop numerical simulation
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Advances in catalytic pyrolysis of lignin toward aromatic hydrocarbon production 认领 引用
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作者 NIE Weidong SUN Daoxuan +14 位作者 TIAN Shue CHEN Lei YANG Shuangxia LI Tianjin DONG Zhiguo XIE Xinping JIN Fuqiang YI Xiaolu ZHAO Yuying XU Meirong LI Yong ZHAO Baofeng SI Hongyu HUA Dongliang SUN Laizhi 《燃料化学学报（中英文）》 EI CAS CSCD 北大核心 2026年第5期57-75,共19页
Aromatic hydrocarbons,as crucial chemical feedstocks,are widely utilized in the production of fuels,synthetic fibers,and pharmaceuticals,mainly originate from petroleum refining.The catalytic conversion of lignin to p... Aromatic hydrocarbons,as crucial chemical feedstocks,are widely utilized in the production of fuels,synthetic fibers,and pharmaceuticals,mainly originate from petroleum refining.The catalytic conversion of lignin to produce aromatic hydrocarbons represents one of the important pathways for achieving green production of these chemicals.The core of catalytic pyrolysis of lignin to produce aromatic hydrocarbons lies in the regulation of catalyst acidity and pore structure,optimization of reaction conditions,and the understanding of the conversion mechanisms.Therefore,this review summarizes the influence of pyrolysis methods,catalysts,and reaction conditions on the catalyzed pyrolysis of lignin for aromatic hydrocarbon production,systematically outlines the catalytic reaction mechanism,and provides an outlook on future key research directions and ideas,in order to give theoretical and technological guidance for this process. 展开更多
关键词 lignin aromatic hydrocarbons pyrolysis catalysts
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Risk assessment and exposure patterns of hydroxypolycyclic aromatic hydrocarbons in elderly population:Insights from urinary metabolite levels and dietary habits 认领 引用
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作者 Yafei Gao Biwen Wang +8 位作者 Liting Hua Juanhua Li Junqi Liu Yang Peng Lu Cheng Hongkai Zhu Hongwen Sun Han Li Hongzhi Zhao 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2026年第5期37-47,共11页
Polycyclic aromatic hydrocarbons(PAHs)are well-known for their adverse health effects and have garnered significant global attention.This study assessed the levels of ten monohydroxy metabolites of PAHs(OH-PAHs),deriv... Polycyclic aromatic hydrocarbons(PAHs)are well-known for their adverse health effects and have garnered significant global attention.This study assessed the levels of ten monohydroxy metabolites of PAHs(OH-PAHs),derived from naphthalene,fluorene,phenanthrene,and pyrene,in urine samples collected from 495 elderly individuals in southern China.OH-PAH concentrations ranged from 0.134 to 183 ng/mL,with OH-Nap(the monohydroxy metabolite of naphthalene)being the most prevalent,accounting for 76.8%of total metabolites.Significant correlations were observed between urinary OH-PAH levels and demographic factors including gender,smoking,and alcohol consumption,with smoking emerging as the strongest determinant.Regression analyses indicated that steaming significantly reduced PAH exposure(e.g.,for 1-OHNap:β=-0.103,95%CI:-0.67,-0.04,p-6),primarily due to pyrene and naphthalene,which together accounted for 87.2%of the total.This study delineates the link between PAH metabolites and dietary habits,uncovering health risks for the elderly population in the region.It provides a scientific basis for environmental health and pollution prevention policies aimed at mitigating the adverse effects of PAHs on environmental and public health. 展开更多
关键词 Polycyclic aromatic hydrocarbons Biomonitoring Dietary habits Risk assessment Elderly population
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Aliphatic hydrocarbon distribution as fingerprint for reconstructing the paleoenvironment of the Miocene coal from Muara Teweh Mine,Warukin Formation,Barito Basin,Kalimantan 认领 引用
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作者 Rizka Berliana Putri Yulfi Zetra +3 位作者 R.Y.Perry Burhan Husnul Rohma Naela Shofa Amirul Muhtadun 《Energy Geoscience》 EI CAS CSCD 2026年第3期93-104,共12页
Low-to medium-rank coal reservoirs are considered to have the potential to store biogenic gas reserves and can be processed through downstream thermochemical gasification to produce synthetic gas.To prove this,biomark... Low-to medium-rank coal reservoirs are considered to have the potential to store biogenic gas reserves and can be processed through downstream thermochemical gasification to produce synthetic gas.To prove this,biomarker analysis of four coal samples collected from the Muara Teweh Mine,Warukin Formation,Barito Basin,Kalimantan,was performed to investigate the organic geochemical characteristics and provide information regarding the viability of coal as a biogenic gas reservoir.The determination of aliphatic hydrocarbon distribution using Gas Chromatography-Mass Spectrometry(GC-MS)shows groups of 22 n-alkanes,2 isoprenoids,20 hopanoids,and 5 bicyclic sesquiterpenoids.The nalkane biomarkers with unimodal distribution and the prevalence of long-chain over short-chain carbons,particularly at n-C29,indicate the source of organic matter is dominated by terrigenous plants with low maturity and high biodegradation rates.This is also strengthened by the distribution of hopanoids and the presence of unstable compounds such as 17β(H)-22,29,30-trisnorhopane(βTm)and 4,4,8,9,9-pentamethyldecalin.Very high ratios of Pr/Ph(15.26–22.36)and the ratios of C32/C31 hopane and C29αβ/C30αβindicate a hyperoxic environment for deposition.The crossplot results show that the coal samples involved are humic coal and classified as typeⅢkerogen,which is gas-prone.The overall results of the biomarker analysis indicate that the studied coals can be transformed into gas form through gasification,as evidenced by the degree of biodegradation and maturity. 展开更多
关键词 Aliphatic hydrocarbon Biomarker Gas Warukin Formation Barito Basin
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