Taking a hydrocarbon zone or a basin group as a unit,this paper analyzed the vertical hydrocarbon generation regularity of onshore and offshore oil and gasfields in China,based on the theory of co-control of source an...Taking a hydrocarbon zone or a basin group as a unit,this paper analyzed the vertical hydrocarbon generation regularity of onshore and offshore oil and gasfields in China,based on the theory of co-control of source and heat.The results demonstrated that the hydrocarbon generation modes of oil and gasfields in China are orderly.First,the hydrocarbon zones in southeastern China offshore area,including the East and South China Sea basins,are dominated by single hydrocarbon generation mode,which displays as either single oil generation in the near shore or single gas generation in the offshore controlled by both source and heat.Second,the eastern hydrocarbon zones,including the Bohai Bay,Songliao and Jianghan basins and the North and South Yellow Sea basins,are dominated by a two-layer hydrocarbon generation mode,which performs as“upper oil and lower gas”.Third,the central hydrocarbon zones,including the Ordos,Sichuan and Chuxiong basins,are also dominated by the“upper oil and lower gas”two-layer hydrocarbon generation mode.In the Ordos Basin,gas is mainly generated in the Triassic,and oil is predominantly generated in the Paleozoic.In the Sichuan Basin,oil was discovered in the Jurassic,and gas was mostly discovered in the Sinian and Triassic.Fourth,the western hydrocarbon zones are dominated by a“sandwich”multi-layer mode,such as the Junggar,Tarim,Qaidam basins.In summary,the theory of co-control of source and heat will be widely applied to oil and gas exploration all over China.Oil targets should be focused on the near shore areas in the southeastern China sea,the upper strata in the eastern and middle hydrocarbon zones,and the Ordovician,Permian and Paleogene strata in the western hydrocarbon zone,while gas targets should be focused on the off-shore areas in the southeastern China sea,the Cambrian,Carboniferous,Jurassic,and Quaternary strata in the western hydrocarbon zone.A pattern of exploring gasfields under or outside oilfields and oilfields under or outside gasfields is presented.Therefore,there is still a great prospect for oil and gas exploration in China.展开更多
[目的]通过分析针刀治疗腰椎间盘突出症(LDH)的随机对照试验(RCT)结局指标使用现状,为构建该领域核心指标集提供循证医学依据。[方法]全面检索2005年1月至2024年9月PubMed、Web of Science、Cochrane Library、EMbase、中国知网、维普...[目的]通过分析针刀治疗腰椎间盘突出症(LDH)的随机对照试验(RCT)结局指标使用现状,为构建该领域核心指标集提供循证医学依据。[方法]全面检索2005年1月至2024年9月PubMed、Web of Science、Cochrane Library、EMbase、中国知网、维普网、万方数据知识服务平台、SinoMed、ClinicalTrials.gov、CHiCTR和ITMCTR中所有有关针刀治疗LDH的RCT,通过提取、归纳和分析相关结局指标,制定针刀治疗LDH的指标域。[结果]最终纳入369篇RCT,样本总量40430例,涉及107种不同的结局指标,累计出现1092次。结局指标以症状/体征最多(75.46%),其次是理化检查(18.41%)、生活质量评价(2.56%)、安全性评价(2.56%)、远期疗效(1.37%)、中医证候(1.28%)、患者满意度(0.64%)和经济学评估(0.18%)。结果表明当前针刀治疗LDH的RCT结局指标应用普遍存在主/次结局指标未区分、缺乏客观性、过度关注短期疗效、经济学指标缺乏、生活质量未受重视和安全性评价关注度低的问题。[结论]建议研究者构建针刀治疗LDH的核心指标集,以此增进针刀治疗LDH研究设计的规范性、结局指标选定的合理性以及研究结论的可靠性。展开更多
为全面厘清国外煤矿风险预控管理领域的研究热点及前沿趋势,采用Ucinet和VOSViewer软件对Web of Science核心数据库和Scopus数据库中1 274篇外文文献进行可视化分析,进而揭示煤矿风险管控的主题演变脉络并提出未来展望。研究结果表明:...为全面厘清国外煤矿风险预控管理领域的研究热点及前沿趋势,采用Ucinet和VOSViewer软件对Web of Science核心数据库和Scopus数据库中1 274篇外文文献进行可视化分析,进而揭示煤矿风险管控的主题演变脉络并提出未来展望。研究结果表明:国外煤矿风险预控管理相关研究在时间分布上经历了“探索-成长-爆发”3个阶段,且发文量在2014年后呈迅猛上升趋势;从风险管理的内涵角度对热点词进行归纳总结,研究内容呈现出主体识别、评估过程和控制手段三大主题;未来研究需要重点关注大数据技术同危险源监测、系统效率提升以及长效机制构建等方面相结合的问题。研究结果可为我国煤矿安全领域未来双重预防管理体系建设提供多方信息支持。展开更多
基金National Basic Research Program of China(973 Program)“Fundamental research on petroleum resources generation and distribution in deep basins in the South China Sea”(No.2009CB219400)National Science and Technology Major Project“Key technologies of deep sea petroleum exploration”(No.2008ZX05025,2011ZX05025).
文摘Taking a hydrocarbon zone or a basin group as a unit,this paper analyzed the vertical hydrocarbon generation regularity of onshore and offshore oil and gasfields in China,based on the theory of co-control of source and heat.The results demonstrated that the hydrocarbon generation modes of oil and gasfields in China are orderly.First,the hydrocarbon zones in southeastern China offshore area,including the East and South China Sea basins,are dominated by single hydrocarbon generation mode,which displays as either single oil generation in the near shore or single gas generation in the offshore controlled by both source and heat.Second,the eastern hydrocarbon zones,including the Bohai Bay,Songliao and Jianghan basins and the North and South Yellow Sea basins,are dominated by a two-layer hydrocarbon generation mode,which performs as“upper oil and lower gas”.Third,the central hydrocarbon zones,including the Ordos,Sichuan and Chuxiong basins,are also dominated by the“upper oil and lower gas”two-layer hydrocarbon generation mode.In the Ordos Basin,gas is mainly generated in the Triassic,and oil is predominantly generated in the Paleozoic.In the Sichuan Basin,oil was discovered in the Jurassic,and gas was mostly discovered in the Sinian and Triassic.Fourth,the western hydrocarbon zones are dominated by a“sandwich”multi-layer mode,such as the Junggar,Tarim,Qaidam basins.In summary,the theory of co-control of source and heat will be widely applied to oil and gas exploration all over China.Oil targets should be focused on the near shore areas in the southeastern China sea,the upper strata in the eastern and middle hydrocarbon zones,and the Ordovician,Permian and Paleogene strata in the western hydrocarbon zone,while gas targets should be focused on the off-shore areas in the southeastern China sea,the Cambrian,Carboniferous,Jurassic,and Quaternary strata in the western hydrocarbon zone.A pattern of exploring gasfields under or outside oilfields and oilfields under or outside gasfields is presented.Therefore,there is still a great prospect for oil and gas exploration in China.
文摘[目的]通过分析针刀治疗腰椎间盘突出症(LDH)的随机对照试验(RCT)结局指标使用现状,为构建该领域核心指标集提供循证医学依据。[方法]全面检索2005年1月至2024年9月PubMed、Web of Science、Cochrane Library、EMbase、中国知网、维普网、万方数据知识服务平台、SinoMed、ClinicalTrials.gov、CHiCTR和ITMCTR中所有有关针刀治疗LDH的RCT,通过提取、归纳和分析相关结局指标,制定针刀治疗LDH的指标域。[结果]最终纳入369篇RCT,样本总量40430例,涉及107种不同的结局指标,累计出现1092次。结局指标以症状/体征最多(75.46%),其次是理化检查(18.41%)、生活质量评价(2.56%)、安全性评价(2.56%)、远期疗效(1.37%)、中医证候(1.28%)、患者满意度(0.64%)和经济学评估(0.18%)。结果表明当前针刀治疗LDH的RCT结局指标应用普遍存在主/次结局指标未区分、缺乏客观性、过度关注短期疗效、经济学指标缺乏、生活质量未受重视和安全性评价关注度低的问题。[结论]建议研究者构建针刀治疗LDH的核心指标集,以此增进针刀治疗LDH研究设计的规范性、结局指标选定的合理性以及研究结论的可靠性。
文摘为全面厘清国外煤矿风险预控管理领域的研究热点及前沿趋势,采用Ucinet和VOSViewer软件对Web of Science核心数据库和Scopus数据库中1 274篇外文文献进行可视化分析,进而揭示煤矿风险管控的主题演变脉络并提出未来展望。研究结果表明:国外煤矿风险预控管理相关研究在时间分布上经历了“探索-成长-爆发”3个阶段,且发文量在2014年后呈迅猛上升趋势;从风险管理的内涵角度对热点词进行归纳总结,研究内容呈现出主体识别、评估过程和控制手段三大主题;未来研究需要重点关注大数据技术同危险源监测、系统效率提升以及长效机制构建等方面相结合的问题。研究结果可为我国煤矿安全领域未来双重预防管理体系建设提供多方信息支持。
