青藏高原新生代陆相盆地群沉积演化与油气资源潜力  

Sedimentary evolution and hydrocarbon resource potential of Cenozoic continental basins in the Tibetan Plateau.

作　　者：王立成 李亚林[2] 沈立建[3] 韩中鹏[2] 彭恒 李祥辉[4] 魏玉帅[2] WANG LiCheng;LI YaLin;SHEN LiJian;HAN ZhongPeng;PENG Heng;LI XiangHui;WEI YuShuai(State Key Laboratory of Tibetan Plateau Earth System,Environment and Resources,Institute of Tibetan Plateau Research,Chinese Academy of Sciences,Beijing 100101,China;School of Earth Science and Resources,China University of Geosciences,Beijing 100083,China;MNR Key Laboratory of Metallogeny and Mineral Assessment,Institute of Mineral Resources,Chinese Academy of Geological Sciences,Beijing 100037,China;School of Earth Sciences and Engineering,Nanjing University,Nanjing 210023,China)

机构地区：[1]青藏高原地球系统与资源环境重点实验室,中国科学院青藏高原研究所,北京100101 [2]中国地质大学(北京)地球科学与资源学院,北京100083 [3]成矿作用与资源评价自然资源部重点实验室,中国地质科学院矿产资源研究所,北京100037 [4]南京大学地球科学与工程学院,南京210023

出　　处：《岩石学报》2025年第3期1101-1119,共19页Acta Petrologica Sinica

基　　金：第二次青藏综合科学考察研究(2019QZKK0803)资助.

摘　　要：青藏高原新生代发育伦坡拉陆相盆地群(伦坡拉和尼玛盆地等)以及贡觉陆相盆地群(芒康、囊谦和贡觉盆地等),不仅是高原隆升沉积响应的记录,也是油气资源的潜在赋存地,特别是伦坡拉盆地还获得了西藏迄今唯一发现的工业油藏。然而,对这些陆相盆地群的沉积时代、盆地性质以及烃源岩层位与资源潜力等还存有争议,特别是对东部的贡觉陆相盆地群的认识程度很低,严重制约了其油气资源潜力评价。第二次青藏科学考察实施以来,有关这些新生代陆相盆地的地层时代、古环境和古气候演化、以及古高度演变等方面的新证据、新认识不断涌现,为探讨这些盆地油气的成藏条件奠定了基础。本文系统论述陆相盆地群的地层时代与沉积演化,对盆地群烃源岩发育的层位、特征与油气潜力开展了对比,揭示富有机质聚集的机制,提出伦坡拉盆地群的油气资源潜力明显优于贡觉盆地群。The Cenozoic continental Lunpola Basin Group(including Lunpola and Nima basins)and Gonjo Basin Group(including the Mangkang,Nangqian,and Gonjo basins)on the Tibetan Plateau,not only serve as sedimentary records of the uplift,but also hold potential hydrocarbon resources.Particularly,the Lunpola Basin has yielded the only industrial oilfield discovered in Tibet to date.However,there remain disputes regarding the sedimentary ages,basin property,hydrocarbon source rock distribution,and source rock potential of these continental basin groups,especially in the poorly understood Gonjo Basin Group in the east,which severely hampers the understanding of its hydrocarbon resource potential.Since the Second Qinghai-Tibet Scientific Expedition,insights into the stratigraphic ages,paleoenvironmental and paleoclimatic evolution,as well as paleo-elevation changes of these Cenozoic continental basins have continued to emerge,leading to new understandings of their petroleum geological conditions.This paper systematically discusses the stratigraphic ages and sedimentary evolution of the continental basin groups,conducts a comparative analysis of the development,characteristics,and hydrocarbon potential of source rocks within these basins,reveals mechanisms for the accumulation of organic matter,and suggests that the hydrocarbon resource potential of the Lunpola Basin Group is significantly superior to that of the Gonjo Basin Group.

关 键 词：烃源岩 资源潜力 地层时代 盆地演化 陆相盆地 青藏高原 

分 类 号：P588.21[天文地球—岩石学] P618.13[天文地球—地质学]