四川盆地龙门山山前断裂带侏罗系油砂油的特征及成因
Characteristics and Origin of Jurassic Oil Sands in the Piedmont Fault Belt of Longmen Mountain, Sichuan Basin
DOI: 10.12677/OJNS.2017.54053, PDF, HTML, XML, 下载: 1,360  浏览: 2,891 
作者: 林雪梅, 王 旭, 黄思钦：成都理工大学，油气地质及开发工程国家重点实验室，四川 成都；宋世荣：中国石油长庆油田分公司第三采油厂，陕西 西安
关键词: 江油厚坝；侏罗系；油砂；生物标志化合物；Jiangyou Houba； Jurassic System； Oil Sand； Biomarker Compounds
摘要: 江油厚坝处于龙门山构造带的山前带，据调查现厚坝地区侏罗系的油气显示好，油苗分布范围较广。通过GC-MS分析等方法对研究区油砂样品的分析，研究区的样品生物标志化合物特征表现为三环萜烷丰富，以C23为主峰，规则甾烷具有C29 > C27 > C28的反“L”型特征；伽马蜡烷指数为0.56，Ts/Tm < 1，成熟度约1.99%，说明原油来自于海相高盐度还原环境。该地区主要发育下寒统筇竹寺组与上三叠统须家河组两套规模的烃源岩，由于该样品成熟度与寒武系更加接近，芳烃特征与须家河组差别太大，且萜烷和甾烷分布特征与寒武系烃源岩具有一定的相似性。因此分析认为厚坝地区侏罗系油砂岩中的原油来源是寒武系黑色泥质烃源岩。
Abstract: The Jiangyou Houba is in the mountain front belt of Longmen mountain tectonic belt, according to the investigation, the Jurassic oil and gas show well in Houba, the distribution of a wide range of oil. The analysis of oil sand samples in the study area was carried out by means of GC-MS analysis. The characteristics of biomarkers in the study area are characterized by the abundance of tricyclic terpenes and the main peak of C23. Regular steroids have the anti-“L”-type characteristics of C29 > C27 > C28.The gammacerane index is 0.56, Ts/Tm < 1, Maturity is about 1.99%. It shows that crude oil comes from marine high salinity reduction environment. This area mainly developed in the lower Cambrian Qiongzhusi formation and Xujiahe formation of two sets of hydrocarbon source rocks, the maturity of the sample is closer to that of the Cambrian, the difference between aromatic hydrocarbon and Xujiahe formation is too large, the distribution characteristics of terpenes and steroids are similar to those of Cambrian source rocks. Therefore, it is considered that the source of crude oil in Jurassic oil sands in Houba area is Cambrian black mudstone source rock.
文章引用：林雪梅, 王旭, 黄思钦, 宋世荣. 四川盆地龙门山山前断裂带侏罗系油砂油的特征及成因[J]. 自然科学, 2017, 5(4): 387-397. https://doi.org/10.12677/OJNS.2017.54053

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