| 190 | 0 | 165 |
| 下载次数 | 被引频次 | 阅读次数 |
综合运用TOC测定、岩石热解、干酪根碳同位素测定、饱和烃色质分析及流体包裹体分析等方法,研究神木北地区二叠系煤系烃源岩地球化学特征及其对盒8段天然气成藏的贡献。结果表明,山2段及太原组均为煤系烃源岩,类型以Ⅱ2-Ⅲ型为主;成熟度呈分带性,山21亚段为成熟阶段,山22亚段与太原组为成熟-高熟阶段,山23亚段为高熟阶段。姥植比(Pr/Ph)与伽马蜡烷指数(GI)显示,山2段及太原组形成于弱氧化-弱还原环境的淡水-微咸水体系;结合生物标志化合物、显微组分及干酪根碳同位素,确定两者母质均以高等植物为主。天然气碳同位素特征表明,盒8段、山西组及太原组天然气均以煤型气为主,山西组、太原组天然气源自自身烃源岩,盒8段为两者混源。基于气体组分与碳同位素建立图版,山西组对盒8段天然气贡献比例43%～97%(平均72%),为主要供源。流体包裹体与单井埋藏史分析显示,太原组存在两期油气充注:早白垩世初期(134～128 Ma)以油充注为主,末期(122～105 Ma)以气充注为主;盒8段也存在两期充注:早白垩世中期(129～122 Ma)以油充注为主,末期(122～100 Ma)以气充注为主。
Abstract：By comprehensively applying TOC determination, rock pyrolysis, kerogen carbon isotope determination, saturated hydrocarbon chromatography-mass spectrometry analysis and fluid inclusion analysis, this study investigated the geochemical characteristics of the Permian coal-measure source rocks in the northern Shenmu area of the Ordos Basin and their contribution to the natural gas accumulation of He 8 member. The analysis results show that the source rocks of both Shan 2 member and Taiyuan Formation in the northern Shenmu area belong to coal-measure source rocks, primarily classified as type Ⅱ2 ～ Ⅲ. The maturity exhibits zoning characteristics with Shan 21 submember in the mature stage, the Shan 22 submember and Taiyuan Formation in the mature to over-mature stage, and the Shan 23 submember in the over-mature stage. The Pr/Ph value and gammacerane index indicate that the coal-measure source rocks of Shan 2 member and Taiyuan Formation were deposited in a weakly oxidizing to weakly reducing environment in a freshwater to brackish water system. Biomarker, microscopic component and kerogen carbon isotope analyses show that the parent materials of Shan 2 member and Taiyuan Formation source rocks are mainly higher plants. The carbon isotope characteristics of natural gas indicate that the natural gas in He 8 member, Shanxi Formation and Taiyuan Formation is mainly coal-type gas, and that the natural gas in Shanxi Formation and Taiyuan Formation mainly originates from its own source rocks, while the natural gas in He 8 member is mainly generated by both of the source rocks. Based on gas component and carbon isotope, a natural gas mixing ratio chart for the study area was established, and it was calculated that the natural gas in He 8 member mainly originated from the Shanxi Formation coal-measure source rocks, with a contribution ratio of 43% to 97%(average 72%). The liquid inclusions and single-well burial history analysis suggest that Taiyuan Formation experienced two periods of oil and gas charging: the early Cretaceous(134 to 128 Ma) dominated by oil charging and the late early Cretaceous(122 to 105 Ma) dominated by gas charging, and that He 8 member also experienced two periods of charging: the middle Cretaceous(129 to 122 Ma) dominated by oil charging and the late early Cretaceous(122 to 100 Ma) dominated by gas charging.
[1]付金华,范立勇,刘新社,等.鄂尔多斯盆地天然气勘探新进展、前景展望和对策措施[J].中国石油勘探,2019,24(4):418-430.FU Jinhua,FAN Liyong,LIU Xinshe,et al.New progresses,prospects and countermeasures of natural gas exploration in the Ordos Basin[J].China Petroleum Exploration,2019,24(4):418-430.
[2]李勇,许卫凯,高计县,等.“源-储-输导系统”联控煤系气富集成藏机制:以鄂尔多斯盆地东缘为例[J].煤炭学报,2021,46(8):2440-2453.LI Yong,XU Weikai,GAO Jixian,et al.Mechanism of coal measure gas accumulation under integrated control of“source reservoir-transport system”:case study from east margin of Ordos Basin[J].Journal of China Coal Society,2021,46(8):2440-2453.
[3]李勇,徐凤银,唐书恒,等.鄂尔多斯盆地煤层(岩)气勘探开发进展及发展方向[J].天然气工业,2024,44(10):63-79.LI Yong,XU Fengyin,TANG Shuheng,et al.Progress and development direction of coalbed methane(coal-rock gas)exploration and development in the Ordos Basin[J].Natural Gas Industry,2024,44(10):63-79.
[4]刘建良,刘可禹,桂丽黎.鄂尔多斯盆地中部上古生界流体包裹体特征及油气充注史[J].中国石油大学学报(自然科学版),2019,43(2):13-24.LIU Jianliang,LIU Keyu,GUI Lili.Fluid inclusion characteristics and hydrocarbon charge history in the Upper Paleozoic,central Ordos Basin[J].Journal of China University of Petroleum(Edition of Natural Science),2019,43(2):13-24.
[5]吴小奇,倪春华,陈迎宾,等.鄂尔多斯盆地定北地区上古生界天然气来源[J].天然气地球科学,2019,30(6):819-827.WU Xiaoqi,NI Chunhua,CHEN Yingbin,et al.Source of the Upper Paleozoic natural gas in Dingbei area in the Ordos Basin[J].Natural Gas Geoscience,2019,30(6):819-827.
[6]杨丽丽,徐飞,陈斗,等.鄂尔多斯盆地东北部天然气地球化学特征及成藏分析[J].长江大学学报(自然科学版),2022,19(5):18-26.YANG Lili,XU Fei,CHEN Dou,et al.Geochemical characteristics and accumulation analysis of natural gas in northeastern Ordos Basin[J].Journal of Yangtze University(Natural Science Edition),2022,19(5):18-26.
[7]张佳琦,赵靖舟,李军,等.鄂尔多斯盆地东南部大宁-吉县区块上古生界盒8段流体包裹体特征及成藏意义[J].西安石油大学学报(自然科学版),2024,39(3):34-41.ZHANG Jiaqi,ZHAO Jingzhou,LI Jun,et al.Characteristic of fluid inclusions in upper Paleozoic He member of Daning-Jixian block,southeastern Ordos Basin and its significance for hydrocarbon accumulation[J].Journal of Xi’an Shiyou University(Natural Science Edition),2024,39(3):34-41.
[8]赵凡凡,崔军平,任战利,等.鄂尔多斯盆地中部二叠系油气充注期次分析:以陕西吴起地区山西组-石盒子组为例[J].地质通报,2025,44(5):778-791.ZHAO Fanfan,CUI Junping,REN Zhanli,et al.Analysis of oil and gas accumulation periods in the Permian system in the central Ordos Basin:case study of Shanxi-Shihezi Formation in Wuqi area[J].Geological Bulletin of China,2025,44(5):778-791.
[9]杨华,刘新社,闫小雄,等.鄂尔多斯盆地神木气田的发现与天然气成藏地质特征[J].天然气工业,2015,35(6):1-13.YANG Hua,LIU Xinshe,YAN Xiaoxiong,et al.The Shenmu Gas Field in the Ordos Basin:Its discovery and reservoirforming geological characteristics[J].Natural Gas Industry,2015,35(6):1-13.
[10]ZHAO Z,ZHANG Z,LI Y,et al.Genesis of tight sand gas in the Ordos Basin,China[J].Organic Geochemistry,2014,74:76-84.
[11]冯乔,李海斌,周海峰,等.准噶尔盆地东南缘西大龙口梧桐沟组-锅底坑组烃源岩地球化学特征[J].山东科技大学学报(自然科学版),2017,36(2):1-10.FENG Qiao,LI Haibin,ZHOU Haifeng,et al.Geochemical characteristics of hydrocarbon source rock in WutonggouGuodikeng Formation of west Dalongkou,southeast of Junggar Basin[J].Journa Iof Shandong University of Science and Technology(Natural Science),2017,36(2):1-10.
[12]廖永胜.高-过成熟气源岩评价的若干问题[J].石油勘探与开发,2005,32(4):147-152.LIAO Yongsheng.Some issues about evaluation on high-over matured gas source rocks[J].Petroleum Exploration and Development,2005,32(4):147-152.
[13]赵娅,何涛华,曾强浩,等.苏北盆地高邮凹陷阜二段页岩有机质显微特征及富集机制[J].天然气地球科学,2025,36(4):734-748.ZHAO Ya,HE Taohua,ZENG Qianghao,et al.Microscopic characteristics and enrichment mechanism of organic matter in the second member of Funing Formation shale in the Gaoyou Sag,Subei Basin,China[J].Natural Gas Geoscience,2025,36(4):734-748.
[14]曹晶晶,刚文哲,杨尚儒,等.鄂尔多斯盆地西南缘平凉地区长8油藏油源对比及油气充注特征[J].天然气地球科学,2024,35(1):149-163.CAO Jingjing,GANG Wenzhe,YANG Shangru,et al.Oil-source correlation and hydrocarbon charging characteristics of Chang reservoir in the Pingliang area,southwest Ordos Basin[J].Natural Gas Geoscience,2024,35(1):149-163.
[15]刘兵兵,马东正,秦臻,等.准噶尔盆地吉木萨尔南部中上二叠统沉积古环境分析:来自泥页岩生物标志化合物和元素地球化学方面的证据[J].天然气地球科学,2022,33(10):1571-1584.LIU Bingbing,MA Dongzheng,QIN Zhen,et al.Analysis of sedimentary paleoenvironment of Middle and Upper Permian in southern Jimsar,Junggar Basin:Evidence from biomarkers and elemental geochemistry of mudstone[J].Natural Gas Geoscience,2022,33(10):1571-1584.
[16]钟鸣宇,徐建永,徐耀辉,等.咸水湖相烃源岩热演化过程中排出油和滞留油分子地球化学特征及其地质意义[J].矿物岩石地球化学通报,2025,44(1):134-146.ZHONG Mingyu,XU Jianyong,XU Yaohui,et al.Molecular geochemical characteristics of expelled and retained oil during thermal evolution of source rocks in the brackish lake phase and their geological significance[J].Bulletin of Mineralogy,Petrology and Geochemistry,2025,44(1):134-146.
[17]张宇,李二庭,米巨磊,等.准噶尔盆地东部古生界深层天然气轻烃地球化学特征[J].天然气地球科学,2024,35(10):1847-1861.ZHANG Yu,LI Erting,MI Julei,et al.Geochemical characteristics of light hydrocarbons associated with deep natural gas in the Paleozoic of the eastern Junggar Basin[J].Natural Gas Geoscience,2024,35(10):1847-1861.
[18]陈延贵,焦勇飞,陈骁,等.川中栖霞组天然气地球化学特征与混源比例定量判识[J].天然气地球科学,2025,36(4):677-688.CHEN Yangui,JIAO Yongfei,CHEN Xiao,et al.Quantitative assessment of natural gas geochemical characteristics and mixed source contributions in the Qixia Formation,central Sichuan Basin[J].Natural Gas Geoscience,2025,36(4):677-688.
[19]王振豪,白栋.神木北地区二叠系太原组储层流体包裹体特征与成藏期次[J].中外能源,2022,27(5):29-34.WANG Zhenhao,BAI Dong.Characteristics of fluid inclusions and hydrocarbon accumulation period of Permian Taiyuan Formation reservoirs in Northern Shenmu[J].Sino-Global Energy,2022,27(5):29-34.
[20]任战利,于强,崔军平,等.鄂尔多斯盆地热演化史及其对油气的控制作用[J].地学前缘,2017,24(3):137-148.REN Zhanli,YU Qiang,CUI Junping,et al.Thermal history and its controls on oil and gas of the Ordos Basin[J].Earth Science Frontiers,2017,24(3):137-148.
基本信息:
DOI：10.16452/j.cnki.sdkjzk.2026.01.006
中图分类号:P618.13
引用信息:
[1]王豫昌,邵俊哲,宋默菡,等.鄂尔多斯盆地神木北地区二叠系煤系烃源岩地球化学特征及天然气成藏贡献[J].山东科技大学学报(自然科学版),2026,45(01):62-75.DOI:10.16452/j.cnki.sdkjzk.2026.01.006.
基金信息:
湖北省杰出青年科学基金项目（2025AFA106）
2026-02-15
2026-02-15