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Geochemical Characteristics and Hydrocarbon Generation Modeling of the Paleocene Source Rocks in the Jiaojiang Sag,East China Sea Basin

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Journal of Earth Science 2024年第2期35卷 642-654页

作者： Chuang Lei Shiyan Yin jiaren ye Jingfu Wu Zhaosheng Wang Bin Gao Collaborative Innovation Center of Green Development and Ecological Restoration of Mineral Resources North China University of Science and TechnologyTangshan063210China Key Laboratory of Tectonics and Petroleum Resources China University of GeosciencesMinistry of EducationWuhan430074China CNOOC Research Institute Ltd Beijing100028China

Jiaojiang sag in the East China Sea Basin is at the earlier exploration stage,where characterizing hydrocarbon generation of source rocks is important to understand oil-gas exploration *** geochemical and basin modeling analysis,hydrocarbon generation capacity and process of the Paleocene E_(1)y,E_(1)l and E_(1)m formations were *** show that E_(1)y and E_(1)l mudstones are high-quality source rocks with Type Ⅱ kerogen,which is dominated by both aquatic organisms and terrestrial higher plants deposited in sub-reduced environment.E_(1)m mudstone interbedded with thin carbonaceous mudstone and coal is poor-quality source rock with Type Ⅲ kerogen,whose organic matter was originated from terrestrial higher plants under oxidized *** by burial and maturity histories,E_(1)y and E_(1)l source rocks experienced two hydrocarbon generation stages,which took place in the Late Paleocene and in the Middle to Late Eocene,respectively,and had high hydrocarbon generation capacity with cumulative hydrocarbon volume of 363 and 328 mg/g,respectively.E_(1)m source rock only had one hydrocarbon generation process in the Late Eocene,which had low hydrocarbon generation capacity with cumulative hydrocarbon volume of only 24 mg/*** future oil-gas exploration in the Jiaojiang sag should focus on hydrocarbon generation center and select targets in the central uplift formed before the Miocene with high-quality traps.

关键词： East China Sea Basin Jiaojiang sag source rock geochemical characteristics hydrocarbon generation basin modeling petroleum geology

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东海盆地丽水凹陷古气候和古环境对有机质富集的约束:来自古新统泥岩的元素地球化学证据

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地球科学 2024年第7期49卷 2359-2372页

作者：雷闯叶加仁殷世艳吴景富静禹钱华北理工大学矿业工程学院河北唐山063210 中国地质大学构造与油气资源教育部重点实验室湖北武汉430074 中海油研究总院有限责任公司北京100028 中国科学院大学地球与行星科学学院北京100049

为明晰东海盆地丽水凹陷古新统月桂峰组、灵峰组、明月峰组烃源岩的生烃潜力,基于24个泥岩样品主量和微量元素地球化学研究,剖析了古气候和古环境变化过程及其对有机质富集的影响.结果表明,丽水凹陷古新统沉积物相对贫碎屑组分、富自生... 详细信息

为明晰东海盆地丽水凹陷古新统月桂峰组、灵峰组、明月峰组烃源岩的生烃潜力,基于24个泥岩样品主量和微量元素地球化学研究,剖析了古气候和古环境变化过程及其对有机质富集的影响.结果表明,丽水凹陷古新统沉积物相对贫碎屑组分、富自生组分,且主量和微量元素变化未受到成岩蚀变的影响.根据特征元素参数的垂向变化趋势,认为丽水凹陷古新世月桂峰组→灵峰组→明月峰组沉积时期,古气候经历了温湿→干旱→温湿、水体古盐度经历了半咸水→咸水→淡水、水体古深度经历了较深水→较浅水→浅水、水体还原程度经历了弱还原-还原→氧化→弱氧化-氧化的变化过程.古气候和古环境协同变化控制着沉积物有机质生产和保存/降解,是月桂峰组、灵峰组、明月峰组泥岩有机质富集程度存在差异性的主要原因.月桂峰组泥岩形成于温湿气候下的半深湖-深湖环境,水体生产力高,大量藻类和高等植物有机质在分层的贫氧水体介质中得以保存,导致有机质丰度较高.灵峰组泥岩形成于干旱气候下的滨浅海环境,水体生产力低,高盐度且富氧水体介质不利于藻类生存与保存,导致有机质丰度较低.明月峰组煤系泥岩形成于温湿气候下的海陆过渡环境,地表植被发育,地势平坦适宜大量高等植物有机质堆积,形成煤岩与泥岩互层分布.丽水凹陷油气勘探应围绕有机质丰度高且生烃能力强的月桂峰组生烃中心选择有效构造或岩性圈闭进行钻探.

关键词：主量元素微量元素古气候古环境有机质富集丽水凹陷石油地质

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Molecular and Isotopic Characteristics of Mature Condensates from the East China Sea Shelf Basin Using GC×GC-TOFMS and GC-IRMS

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Journal of Earth Science 2019年第2期30卷 376-386页

作者： Chao Shan jiaren ye Alan Scarlett Kliti Grice Key Laboratory of Tectonics and Petroleum Resources of Ministry of Education China University of Geosciences WA Organic and Isotope Geochemistry Centre and John de Laeter Centrethe Institute for Geoscience ResearchDepartment of Applied ChemistryCurtin University of Technology

In this study, biomarkers, together with stable carbon(δ13 C) and hydrogen(δD) isotopic compositions of n-alkanes have been examined in a suite of condensates collected from the East China Sea Shelf Basin(ECSSB) in order to delineate their source organic matter input, depositional conditions and evaluate their thermal maturity. Previously, GC-MS analyses have shown that all the condensates are formed in oxidizing environment with terrestrial plants as their main source input. No significant differences were apparent for biomarker parameters, likely due to the low biomarker content and high maturity of these condensates. Conventional GC-MS analysis however, may provides limited information on the sources and thermal maturity of complex mixtures due to insufficient component resolution. In the current study, we used comprehensive two-dimensional gas chromatography with time-of-flight mass spectrometry(GC×GC-TOFMS) to increase the chromatographic resolution. Compounds such as alkyl cyclohexanes, alkyl cyclopentanes and diamondoids, which can be difficult to identify using conventional GC-MS analysis, were successfully identified using GC×GC-TOFMS. From our analyses we propose two possibly unreported indicators, including one maturity indicator(C5--cyclohexane/C5+-cyclohexane) and one oxidation-reduction environment indicator(alkyl-cyclohexane/alkyl-cyclopentane). Multiple petroleum charging events were proposed as an explanation for the maturity indicators indexes discrepancy between methyl-phenanthrene index(MPI) and methyl-adamantane index(MDI). In addition, the stable isotopic results show that condensates from the Paleogene have significantly higher positive δ13 C values of individual n-alkanes than the Neogene samples. Based on δD values, the samples can be divided into two groups, the differences between which are likely to be attributed to different biosynthetic precursors. Variation within each group can likely be attributed to vaporization.

关键词： condensate biomarker characteristic source information GC×GC-TOFMS GC-IRMS

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Hydrocarbon Generation, Migration, and Accumulation in the Eocene Niubao Formation in the Lunpola Basin, Tibet, China: Insights from Basin Modeling and Fluid Inclusion Analysis

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Journal of Earth Science 2020年第1期31卷 195-206页

作者： Yiming Liu jiaren ye Qiang Cao Baolin Yang Zhongrong Liu Key Laboratory of Tectonics and Petroleum Resources Ministry of EducationChina University of GeosciencesWuhan 430074China Branch of Exploration Company SINOPECChengdu 610041China

The Eocene Niubao Formation is the primary research target of oil exploration in the Lunpola *** oil was extracted from Well Z1 on the northern margin of the basin in *** this study,an integrated evaluation of the source rock geothermal,and maturity histories and the fluid inclusion and fluid potential distributions was performed to aid in predicting areas of hydrocarbon *** to the abundance of organic matter,the kerogen types,maturity,and oil-sources correlate with the geochemical *** middle submember of the second member of the Niubao Formation(E2n^2-2)is the most favorable source rock based on the amount of oil produced from the E2n^2-3and E2n^***-and twodimensional basin modeling,using BasinMod software,shows that the E2n^2-2source rock started to generate hydrocarbon at 35-30 Ma,reached a maturity of Ro=0.7%at 25-20 Ma,and at present,it has reached the peak oil generation stage with a thermal maturity of Ro=0.8%to less than Ro=1.0%.By using fluid inclusion petrography,fluorescence spectroscopy,and microthermometry,two major periods of oil charging have been revealed at 26.1-17.5 and 32.4-24.6 *** oil accumulation modeling results,conducted by using the Trinity software,show a good fit of the oil shows in the wells and predict that the structural highs and lithologic transitions within the Jiangriaco and Paco sags are potential oil traps.

关键词： Niubao Formation Lunpola Basin source rocks basin modeling fluid inclusions hydrocarbon migration and accumulation petroleum geology

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Tectonic uplift history of the Yitong Basin since the Oligocene,Northeast China:Evidence from apatite fission track ages and geological relationship

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Chinese Journal Of Geochemistry 2010年第3期29卷 293-300页

作者： CAO Qiang ye jiaren SHEN Chuanbo TANG Daqing Key Laboratory ofTectonics and Petroleum Resources China University of Geosciences Ministry of Education Wuhan 430074 China

The Yitong Basin is an oilbearing basin with unique characteristics in Northeast China. On the basis of apatite fission track ages and geological relationship, the tectonic uplift history of the Yitong Basin since the Oligo-cene was discussed. Based on apatite fission track analysis of five samples from the Luxiang and Chaluhe fault depressions and basin modeling study, it can be concluded that since the Oligocene (36.6 Ma) in the Yitong Basin, the Chaluhe fault depression has undergone two episodes of uplift during 24.9-19.1 Ma and 6.9-4.9 Ma. And the Luxiang fault depression also had undergone two episodes of uplift during 30-27.8 Ma and 22.6-11.1 Ma. Moreover, the average apparent exhumation rates for the Chaluhe fault depression and Luxiang fault depression, could be calculated to be 70.34 and 60.33 m/Ma since 21.8 Ma and 18.9 Ma, respectively. The results of thermochronological analysis can also be supported by the evidence from geological relationships such as geodynamics, volcanic activity, and stratigraphic division and correlation.

关键词：裂变径迹年龄地质证据隆升历史盆地构造磷灰石渐新世东北中国

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Development of Overpressure in the Tertiary Damintun Depression, Liaohe Basin, Northern China

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Acta Geologica Sinica(English Edition) 2003年第3期77卷 402-412页

作者： ye jiaren, HAO Fang and CHEN JianyuFaculty of Earth Resources, China University of Geosciences, Wuhan, Hubei 430074 E-mail: jrye@*** Ren Xifei and Zhu Xiling China Univ Geosci Fac Earth Resources Wuhan 430074 Hubei Peoples R China

The Damintun depression is one of the four depressions in the Liaohe basin in northern China, and is a rift basin developed in the Paleogene. This paper discusses in detail the characteristics of pressure and fluid potential of the Damintun depression based on a synthesis of the data from boreholes, well tests and seismic surveys. Data from sonic logs, well tests and seismic velocity measurements are used to study the pressure characteristics of the areas. From the sonic log data, shales can be characterized as normally pressured, slightly overpressured or highly overpressured; from the well test data, the pressure-depth gradient in oil-producing intervals implies hydrostatic pressure in general. Most seismic profiles in the Damintun depression are of sufficiently high quality for seismic velocities to be measured. The fluid pressures, excess pressures and pressure coefficients in 47 representative seismic profiles are predicted using formula calculation methods, and further transformed to fluid potenti

关键词： overpressure seismic data pressure evolution fluid potential Damintun depression Liaohe basin China

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Geological Analogy Expert System of Oil-Generating Depressions

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Journal of Earth Science 1993年第1期12卷 94-99页

作者： ye jiaren Lu Mingde Wang FeiqiaoChina University of Geosciences , Wuhan 430074

The geologic analogy expert system of oil-generating depressions (GAESOD) constructed on IBM 386 by using GCLISP language is a tool-type expert system for geologic analogy .GAESOD consists of eight parts: (1) illustrating module of system; (2) general controlling module; (3) knowledge base; (4 (reasoning module; (5 )data base; (6)explanation module; (7)gaining and managing module of knowledge; (8) managing module of data base .There are 36 known models of oil-generating depressions of the eastern part and the continental shelf of China in the knowledge base .Three values,such as resemblance coefficient ,certainty factor and fine-poor coefficient ,will be acquired if this system is applied to any two on-generating depressions .Finally,GAESOD are applied to the analysis of some data from Xichang depression ,Hepu basin and the conclusions from this system are consistent with the results from geologic experts.

关键词： geologic analogy expert system knowledge ,oil-generating depressions .reasoning .

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Evaluation of Hydrocarbon Generated and Expelled from the Jurassic to Early Cretaceous Source Rocks in the Lynedoch Field, Northern Bonaparte Basin, Australia

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International Journal of Geosciences 2016年第4期7卷 584-597页

作者： Rakotondravoavy Jules jiaren ye Qiang Cao Key Laboratory of Tectonics and Petroleum Resources China University of Geosciences MOE Wuhan China Département des Sciences de la Terre et de l’Environnement à la Faculté des Sciences de Technologies et de l’Environnement de l’Université de Mahajanga Mahajanga Madagascar

The Lynedoch field is located on the west flank of the Calder Graben in the north-eastern Bonaparte Basin, Australia. The data from the wells Lynedoch 1 and Lynedoch 2 and Seismic Line N11809 were used to reconstruct the burial and thermal histories and evaluate the hydrocarbon generated and expelled from the Jurassic to Early Cretaceous source rocks of the study area. Basin Mod 1-D and 2-D softwares were used for modeling. The Upper Jurassic Cleia (Lower Frigate) and Lower Cretaceous Echuca Shoals formations source rocks in the well Lynedoch 1 were a fair-to-good source richness with poor hydrocarbon generating potential, showing kerogen type III and gas prone. The Middle Jurassic Plover Formation source rock in the well Lynedoch 2 was a good organic matter richness with poor hydrocarbon generative potential, the late Middle Jurassic (Callovian) Elang Formation source rock in the same well was a fair source rock with poor hydrocarbon generation potential, and the Lower Cretaceous Echuca Shoals Formation source rock in the same well was a fair-to-very good organic richness with poor-to-fair hydrocarbon generating potential, gas prone with kerogen type III, and reaching wet gas window at present day. These previous formations of the both wells generated oil at the Late Cretaceous and gas at the Early Neogene. But, only Echuca Shoals Formation source rock in the well Lynedoch 2 was able to expelled hydrocarbon at the Middle Paleogene and continued up to present day. This Formation represents fair to slightly good potential source rock in the Lynedoch field.

关键词： Calder Graben Hydrocarbon Generation Hydrocarbon Expulsion Lynedoch Field Northern Bonaparte Basin

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Geological Conditions and Hydrocarbon Accumulation Processes in the Sahul Platform, Northern Bonaparte Basin, Australia

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International Journal of Geosciences 2016年第6期7卷 792-827页

作者： Rakotondravoavy Jules jiaren ye Qiang Cao Key Laboratory of Tectonics and Petroleum Resources China University of Geosciences MOE Wuhan China Département des Sciences de la Terre et de l'Environnement à la Faculté des Sciences de Technologies et de l’Environnement de l'Université de Mahajanga Mahajanga Madagascar

The Sahul Platform where the Sunset-Loxton Shoals and Chuditch gas fields were discovered is located between the Timor Trough to the north and the Malita Graben to the south. These areas are located respectively 440 km and 380 km northwest of Darwin in the northern Bonaparte Basin, Australia. Based on the structural evolution of the northern Bonaparte Basin, data from the wells Loxton Shoals 1, Sunset 1 and Chuditch 1 in the Sahul Platform and Heron 1 in the Malita Graben depocentre, and the Seismic Line N11606 were used to clarify the geological conditions and reconstruct the hydrocarbon accumulation processes in the study area. BasinMod 1-D, 2-D, and 3-D software was used for modeling. The Plover Formation source rock was a poor-to-good hydrocarbon generative potential and reached the middle to late mature oil window in the Sunset-Loxton Shoals field whereas in the Chuditch field, it was an overall fair-to-good hydrocarbon generative potential, and attained the Late mature oil window. The Flamingo, and the Echuca Shoals formations source rocks in the same field were a fair and good hydrocarbon generation potential respectively, and both reached mid-mature oil window. In the Malita Graben depocentre, the Petrel (Frigate) and the Echuca Shoals formations source rocks were a poor-to-very good hydrocarbon generating potential, and had attained wet gas window at the present day. The analyses of organic matter showed that the source rocks in the study area and Malita Graben were gas prone with kerogen types II2 & III and III predominantly. The Middle Jurassic Plover Formation sandstone reservoir in the Sunset-Loxton field was a poor-to-very good quality and potential for gas beds, and it was a very poor-to-very good quality and potential for gas beds in the Chuditch field. The intensities of gas generation and expulsion were more than of oil ones either in the Sahul Platform or in the Malita Graben. The Plover, Petrel (Frigate) and Echuca Shoals formations source rocks

关键词： Basin Modeling Hydrocarbon Accumulations Northern Bonaparte Basin Sahul Platform

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One Dimensional Evolution Modeling of Source Rocks in the Chaluhe Basin, Yitong Graben

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International Journal of Geosciences 2016年第8期7卷 1029-1048页

作者： Obed Kweku Agbadze jiaren ye Qiang Cao Key Laboratory of Tectonics and Petroleum Resources China University of Geosciences MOE Wuhan China

Chaluhe Basin is in Jilin Province of China with a cumulative sedimentary rock thickness of about 6000 meters and has four subdivisions: Wanchang Structural High, Bo-Tai Sag, Xinanpu Sag, Liangjia Structure High and the Gudian Slope. The basin with its better source rock distribution and more favorable maturation indicators than the adjacent Moliqing and Luxiang Basins is expected to be a potential hydrocarbon-producing basin. Four (4) wells were used in determining the maturation hydrocarbon generating potential of the mudstone beds present in the Eocene Formations (Shuangyang, Sheling and Yongji). Obtained result revealed heat flow average of 71.8 mW/m2, oil generation between 3.15 mg/g TOC and 39.49 mg/g TOC with gas generation of 6.98 mg/g TOC to 92.83 mg/g TOC. In conclusion the Eocene Shuangyang mudstone is the main petroleum source rock.

关键词： Petrophysics Petrochemicals Hydrocarbons Eocene Mudstone Chaluhe Basin Yitong Graben

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