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Zircon U-Pb geochronology,Hf isotopes,and geochemistry constraints on the age and tectonic affinity of the basement granitoids from the Qiongdongnan Basin,northern South China Sea

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Acta Oceanologica Sinica 2023年第3期42卷 19-30页

作者： lijun mi Xiaoyin Tang Haizhang Yang Shuchun Yang Shuai Guo China National Offshore Oil Corporation(CNOOC)Research Center Beijing 100028China Institute of Geomechanics Chinese Academy of Geological SciencesBeijing 100081China Key Laboratory of Paleomagnetism and Tectonic Reconstruction Ministry of Natural ResourcesBeijing 100081China Key Laboratory of Petroleum Geomechanics China Geological SurveyBeijing 100081China

Studies in the northern South China Sea(SCS)basement remain important for understanding the evolution of the Southeast Asian continental *** to a thick cover of sediments and scarce borehole penetration,little is known about the age and tectonic affinity of this *** this study,an integrated study of zircon U-Pb geochronology,Hf isotopes,and whole-rock major and trace elements on seven basement granitoids from seven boreholes of Qiongdongnan Basin has been carried *** zircon U-Pb results for these granitoids present middle-late Permian((270.0±1.2)Ma;(253±3.4)Ma),middle to late Triassic((246.2±3.4)Ma;(239.3±0.96)Ma;(237.9±0.99)Ma;(228.9±1.0)Ma)and Late Cretaceous ages((120.6±0.6)Ma).New data from this study,in combination with the previous dataset,indicates that granitoid ages in northern SCS basement vary from 270 Ma to 70.5 Ma,with three age groups of 270–196 Ma,162–142 Ma,and 137–71 Ma,*** for the late Paleozoic-Mesozoic rocks in the basement of the northern SCS,a few old zircon grains with the age of(2708.1±17)Ma to(2166.6±19)Ma provide clues to the existence of the pre-Proterozoic *** geochemical signatures indicate that the middle Permian-early Cretaceous granitoids from the Qiongdongnan Basin are I-type granites formed in a volcanic arc environment,which were probably related to the subduction of the Paleo-Pacific Plate.

关键词： Qiongdongnan Basin basement granitoids geochemistry U-Pb and Hf isotopes Paleo-Pacific Plate subduction

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mixed Carbonate-Siliciclastic Deposits in a Channel Complex in the Northern South China Sea

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Journal of Earth Science 2018年第3期29卷 707-720页

作者： Benjun Ma Shiguo Wu lijun mi Thomas Lüdmann Jinwei Gao Wei Gao Key Laboratory of Marine Geology and Environment Institute of OceanologyChinese Academy of SciencesQingdao 266071China Key Laboratory of Marine Georesources and Prospecting Institute of Deep-sea Science and Engineering Chinese Academy of SciencesSanya 572000China University of Chinese Academy of Sciences Beijing 100049China Functional Laboratory for Marine Geology and Environment Qingdao National Laboratory for Marine Science and TechnologyQingdao 266061China Shenzhen Branch China National Offshore Oil CorporationGuangzhou 510420China Institute of Geology Centre for Earth System Research and SustainabilityUniversity of HamburgHamburg 20146Germany

New high-resolution 3D seismic data image a submarine channel complex in the northern slope of the South China Sea. The channel complex stretches hundreds of kilometers across the slope and flows into the deepsea from the siliciclastic shelf margin, linking neritic environment to the pelagic plain. The evolution of the channel complex developed two sedimentary stages, stage Ⅰ （19.1-18.5 Ma） and stage Ⅱ （18.5-17.5 Ma）, separated by erosional surfaces. In the first stage, the complex was rifled with pure siliciclastic sediments, forming thick-massive sandstone intercalated by thin layers of mudstone. During the stage Ⅱ, the channel complex was deposited five carbonate-siliciclastic cycles. The unexpected channel-fifl carbonate deposits present allochthonous characteristics, suggesting the siliciclastic channel was surprisingly used to transport carbonate sediment from the adjacent neritic carbonate platform. By analyzing the periodical carbonate sedimentary process in the siliciclastic channel complex, we infer that it was related to the in situ carbonate production of the neritic carbonate platform and was most likely to be controlled by the relative sea-level changes. Unlike line-source carbonate slope aprons or smafl-sized carbonate channels, the large-sized siliciclastic channel complex links directly neritic carbonate platform to deepwater basin and can transport large volumes of neritic carbonates to the pelagic environment in a short period. The new findings help to estimate the contributions of neritie siliciclastic shelf and carbonate platform to deepwater slope more accurately. This study suggests that channel systems are more complex than expected and have significant implications on the conceptual models describing the deepwater sedimentary theory.

关键词： submarine channels mixed carbonate-siliciclastic deposits allochthonous carbonate sediment flux sedimentology South China Sea.

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Mass transport deposits and processes in the north slope of the Xisha Trough,northern South China Sea

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Acta Oceanologica Sinica 2015年第9期34卷 117-125页

作者： QIN Zhiliang WU Shiguo WANG Dawei LI Wei GONG Shaojun mi lijun SPENCE George Tianjin Research Institute for Water Transport Engineering Ministry of Transport Laboratory of Marine Geophysics and Deep Sea Georesource Sanya Institute of Deep-sea Science and EngineeringChinese Academy of Sciences Tianjin Exploration Center of Marine Geology Department of Exploration China National Offshore Oil Corporation School Earth & Ocean Sciences University of Victoria

Triple mass-transport deposits （MTDs） with areas of 625, 494 and 902 km^2, respectively, have been identified on the north slope of the Xisha Trough, northern South China Sea margin. Based on high-resolution seismic reflection data and multi-beam bathymetric data, the Quaternary MTDs are characterized by typical geometric shapes and internal structures. Results of slope analysis showed that they are developed in a steep slope ranging from 5° to 35°. The head wall scarps of the MTDs arrived to 50 km in length （from headwall to termination）. Their inner structures include well developed basal shear surface, growth faults, stepping lateral scarps, erosion grooves, and frontal thrust deformation. From seismic images, the central deepwater channel system of the Xisha Trough has been filled by interbedded channel-levee deposits and thick MTDs. Therefore, we inferred that the MTDs in the deepwater channel system could be dominated by far-travelled slope failure deposits even though there are local collapses of the trough walls. And then, we drew the two-dimensional process model and three- dimensional structure model diagram af the MTDs. Combined with the regional geological setting and previous studies, we discussed the trigger mechanisms of the triple MTDs.

关键词： South China Sea mass transport deposits submarine slides gravity flow deepwater channel system

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A study on the geochemical characteristics of natural gas and gas sources in the Bozhong sag

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Chinese Journal Of Geochemistry 2007年第4期26卷 402-406页

作者： WEN Zhigang TANG Youjun LI Fuping CHEN Dan mi lijun XUE Yongan Department of Geochemistry Yangtze University Jingzhou 434023 China Key Laboratory of Exploration Technologies for Oil and Gas Resources （Yangtze University） Ministry of Education Jingzhou 434023 China Bohai Institute of CNOOC Research Center Tianjin 340452 China

Natural gas is composed largely of hydrocarbon gas, especially wet gas in the Bozhong sag. The carbon isotopic composition shows that the gas is of organic origin. The carbon isotopic values of ethane indicate that the natural gas is dominated by mixed gas with minor coal-generated gas and oil-type gas. A gas-source correlation study showed that the source rocks of natural gas are those of the Lower Dongying Formation, the Shahejie Formation and the pre-Tertiary. The natural gas is characterized by multi-source and continuous generation in the study area, indicating that gas exploration potential is good in the Bozhong sag.

关键词：天然气碳同位素天然气开采探测方法

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全球海上CO_(2)封存现状及中国近海机遇与挑战

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中国海上油气 2023年第1期35卷 123-135页

作者：米立军中海油研究总院有限责任公司北京100028 海洋油气勘探国家工程研究中心北京100028

海上CO_(2)封存是碳封存的路径之一。全球已广泛开展的CO_(2)海洋封存研究与商业示范案例对中国近海盆地CO_(2)封存研究具有借鉴意义。本文从全球CO_(2)海洋封存发展现状出发,结合典型CO_(2)海洋封存示范工程,根据项目背景、政策/资金/... 详细信息

海上CO_(2)封存是碳封存的路径之一。全球已广泛开展的CO_(2)海洋封存研究与商业示范案例对中国近海盆地CO_(2)封存研究具有借鉴意义。本文从全球CO_(2)海洋封存发展现状出发,结合典型CO_(2)海洋封存示范工程,根据项目背景、政策/资金/技术支持、国际合作以及地质工程特性等相关项目概况,对比分析中国实施CO_(2)海洋封存项目潜在的机遇与挑战,最后对CO_(2)海洋封存技术在中国近海的发展进行了展望。未来中国近海盆地CO_(2)海洋封存研究应从全海域级、盆地级、区带级以及场地级,由面到点、逐级递进、不断聚焦,构建适合中国近海盆地特点评价优选体系标准和相应的客观量化评价方法体系。

关键词： CO_(2)海洋封存中国近海机遇与挑战

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认识创新推动南海东部海域油气勘探不断取得突破——南海东部海域近年主要勘探进展回顾

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中国海上油气 2018年第1期30卷 1-10页

作者：米立军中国海洋石油南海东部石油管理局广东深圳518054

南海东部海域是中国近海重要的油气产区之一。近年来随着勘探程度加深与勘探难度加大,加之国际原油价格大幅下跌导致勘探投入减少,如何寻找优质替代储量与保持油气高产稳产,成为该区域勘探的当务之急。2014年以来,南海东部海域转变勘探... 详细信息

南海东部海域是中国近海重要的油气产区之一。近年来随着勘探程度加深与勘探难度加大,加之国际原油价格大幅下跌导致勘探投入减少,如何寻找优质替代储量与保持油气高产稳产,成为该区域勘探的当务之急。2014年以来,南海东部海域转变勘探思路,拆离断层控盆新认识推动了深水区首次获得亿立方米级原油发现,晚期构造活动控制浅层油气成藏新认识指引了新区勘探突破,富洼找优、差异勘探古近系新思路指导了西江、陆丰凹陷钻探获得成功,累计新发现油气三级地质储量超过2×10~8 m^3油当量,为南海东部海域油气持续稳产高产奠定了扎实的物质基础。南海东部海域中长期勘探应遵循"油气并举、价值勘探"的部署原则,继续坚持围绕富烃洼陷和生产设施展开勘探,继续坚持富洼找优、差异勘探古近系,继续坚持以价值为主导开展深水区大中型油气田勘探,继续坚持以认识创新与技术发展推动地层岩性新领域勘探获得重大突破。

关键词：南海东部海域探进展水区离断层控盆新区期构造运动近系异勘探值勘探

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珠江口盆地白云凹陷烃源岩及北部油气成因

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石油学报 2007年第3期28卷 32-38页

作者：傅宁米立军张功成中海石油研究中心北京100027 中国石油大学

目前在珠江口盆地白云凹陷发现的最为重要的烃源岩分布于始新统和渐新统。其中始新统主要为Ⅰ-Ⅱ，型文昌组湖相烃源岩，渐新统则以Ⅱ-Ⅲ型生气为主的恩平组泥岩为主，含煤及碳质泥岩夹层。油气源对比表明，白云凹陷北坡主要聚集了白云... 详细信息

目前在珠江口盆地白云凹陷发现的最为重要的烃源岩分布于始新统和渐新统。其中始新统主要为Ⅰ-Ⅱ，型文昌组湖相烃源岩，渐新统则以Ⅱ-Ⅲ型生气为主的恩平组泥岩为主，含煤及碳质泥岩夹层。油气源对比表明，白云凹陷北坡主要聚集了白云主洼恩平组Ⅱ2型烃源岩在Ro值为1．2％～1．8％时生成的天然气。白云凹陷文昌组烃源岩厚度大，有机质丰度高，类型好，以早期生油为主，现今成熟生烃范围主要集中在凹陷的南部，是下一步勘探的重点方向。

关键词：珠江口盆地白云凹陷烃源岩油气成因勘探目标

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渤海海域页岩油资源潜力

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石油与天然气地质 2023年第6期44卷 1366-1377页

作者：米立军徐建永李威中海油研究总院有限责任公司北京100028

渤海海域古近系沙河街组和东营组页岩油资源丰富,但勘探程度低,对页岩油资源的潜力评价和资源禀赋差异缺少系统研究,制约了勘探部署和有利区优选。基于渤海海域勘探开发实际情况,综合烃源岩地球化学实验及全岩矿物分析等,明确了渤海海... 详细信息

渤海海域古近系沙河街组和东营组页岩油资源丰富,但勘探程度低,对页岩油资源的潜力评价和资源禀赋差异缺少系统研究,制约了勘探部署和有利区优选。基于渤海海域勘探开发实际情况,综合烃源岩地球化学实验及全岩矿物分析等,明确了渤海海域页岩油的资源潜力并指明了有利勘探方向。研究结果表明:①渤海海域5个富烃凹陷普遍发育优质烃源岩,成熟度适中,有利于形成页岩油。页岩油划分为分散资源、低效资源和富集资源等3类资源,各凹陷富集资源评价显示具有共同特征,总有机碳含量(TOC)>1.8%,热解游离烃量(S_(1))>2.0 mg/g。②渤海海域5个富烃凹陷页岩油富集段均有分布,其中黄河口凹陷和渤中凹陷发育2个不同深度范围的页岩油富集段,且黄河口凹陷页岩油富集段埋深较浅,分布在2800 m左右,辽中凹陷、歧口凹陷和秦南凹陷页岩油富集段埋深分布在2800~3200 m。③渤海海域沙(沙河街组)三段、沙一段和东(东营组)三段页岩油有利区面积均超10000 km^(2),5个富烃凹陷页岩油资源潜力总计超150×10^(8)t,中-高成熟页岩油资源潜力总计超66×10^(8)t,其中黄河口凹陷和辽中凹陷有机质丰度高、类型好,富集页岩油深度浅、资源潜力大,是现阶段最有利的勘探区域。

关键词：资源潜力分级评价含油性页岩油沙河街组东营组渤海海域

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migration of multiples from the South China Sea

Migration of multiples from the South China Sea

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中国科学院地质与地球物理研究所2015年度（第15届）学术年会

作者： LIU YiKe ZHU WeiLin mi lijun ZHOU JiaXiong HAO Hu Institute of Geology and Geophysics Chinese Academy of Sciences China National Offshore Oil Corp(CNOOC)

The South China Sea where water depth is up to 5000 m is the most promising oil and gas exploration area in China in the *** seismic data acquired in the South China Sea contain various types of multiples that need to be removed before imaging can be ***,compared with the conventional reflection migration,multiples carry more information of the underground structure that helps provide better subsurface *** paper presents a method to modify the conventional reverse time migration so that multiple reflections can migrate to their correct locations in the *** approach replaces the numerical impulsive source with the recorded data including primaries and multiples on the surface,and replaces the recorded primary reflection data with *** the reverse time migration process,multiples recorded on the surface are extrapolated backward in time to each depth level,while primaries and multiples recorded on the surface are extrapolated forward in time to the same depth *** matching the difference between the primary and multiple images using an objective function,this algorithm improves the primary resultant *** tests on Sigsbee2B show that the proposed method can obtain a greater range and better undergi’ound *** of deep water in the Soutli China Sea are obtained using multiples and their matching with *** demonstrate that multiples can make up for the reflection illumination and the migration of multiples is an important research direction in the future.

关键词： the South China Sea reverse time migration of multiples seismic imaging

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鄂尔多斯盆地东北缘临兴-神府致密气田成藏地质特征及勘探突破

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中国石油勘探 2021年第3期26卷 53-67页

作者：米立军朱光辉中海石油(中国)有限公司北京研究中心中联煤层气有限责任公司

鄂尔多斯盆地东缘晋西挠褶带一直以煤层气勘探为主,由于成藏特征认识不清,致密气勘探鲜有重大突破。2013年,中国海油大胆由煤层气勘探转向致密气勘探,通过系统总结晋西挠褶带北段致密气成藏条件及气藏特征,揭示了其选择性差异富集成藏规... 详细信息

鄂尔多斯盆地东缘晋西挠褶带一直以煤层气勘探为主,由于成藏特征认识不清,致密气勘探鲜有重大突破。2013年,中国海油大胆由煤层气勘探转向致密气勘探,通过系统总结晋西挠褶带北段致密气成藏条件及气藏特征,揭示了其选择性差异富集成藏规律,指出了有利区并获得储量发现。研究结果表明:(1)临兴—神府气田产层为石炭系本溪组、二叠系太原组、石盒子组,为典型致密砂岩气藏;(2)煤系地层是主要烃源岩,CH_(4)平均含量为95%,不含H2S;(3)气藏埋深为1300~2200m,压力系数为0.85~1.01;(4)储层为大面积分布的三角洲砂岩和障壁沙坝砂岩,前者平均孔隙度为8.8%、渗透率为1.10mD,孔喉半径多小于1.5μm,后者平均孔隙度为7.6%、渗透率为0.59mD,孔喉半径多小于1.1μm;(5)受东部离石走滑断裂带和南部紫金山火山热活动影响,断裂发育具东强西弱、南强北弱的特征,且南部受火山热活动影响,生烃强度高,向北逐渐降低;(6)晚侏罗世生烃后经历3期构造活动,天然气以垂向运聚成藏为主,南部临兴区块以源内、近源、远源立体成藏为主,北部神府区块以源内成藏为主,近源成藏为辅,气藏规模相对较小;(7)创新形成3套勘探关键技术,为致密气的勘探开发提供了技术保障。在以上认识和技术指导下,2021年中国海油在临兴—神府区块探明天然气地质储量1010×10^(8)m^(3),随着自南向北滚动,该区域有可能再次新增千亿立方米储量。

关键词：鄂尔多斯盆地东北缘临兴—神府气田致密砂岩气气藏富集规律关键技术

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