新疆石油地质

›› 2016, Vol. 37 ›› Issue (6): 1-1.doi: 10.7657/XJPG20160607

• 论文 •    

哈拉哈塘凹陷原油地球化学特征及油源判识

李中璇1，徐志明1，王招明2，陈云川3，肖中尧2   

  1. (1.西南石油大学 资源与环境学院,成都 610500;2.中国石油 塔里木油田分公司 勘探开发研究院,新疆 库尔勒 841000; 3.中海油能源发展股份有限公司,广东 深圳 518000)
  • 出版日期:2019-01-01 发布日期:1905-07-17

Geochemical Characteristics of Crude Oil and Oil-Source Correlation in Halahatang Sag

LI Zhongxuan1, XU Zhiming1,WANG Zhaoming2, CHEN Yunchuan3, XIAO Zhongyao2   

  1. (1.School of Resources and Environment, Southwest Petroleum University, Chengdu, Sichuan 610500, China; 2.Research Institute of Exploration and Development, Tarim Oilfield Company, PetroChina, Korla, Xinjiang 841000, China; 3.CNOOC Energy Technology & Services Limited, Shenzhen, Guangdong 518000, China)
  • Online:2019-01-01 Published:1905-07-17

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摘要： 塔里木盆地哈拉哈塘凹陷油气资源丰富，其探明储量超过亿吨。为明确哈拉哈塘凹陷奥陶系油藏主力烃源岩，对烃源岩样品、中深1井原油样品及哈拉哈塘凹陷原油样品进行了系统的地球化学分析，对其轻烃及生物标志化合物特征进行了进一步研究。结果表明，哈拉哈塘凹陷原油样品均具有富链烷烃、贫芳香烃的特点，与中深1井一致，其生油母质为典型的腐泥型；哈拉哈塘凹陷原油样品均能检测到芳构化类异戊二烯烃化合物，是强还原沉积环境的标志。结合烃源岩发育特征及哈拉哈塘凹陷地质背景，认为研究区海相原油主要来自寒武系—下奥陶统烃源岩，而非中—上奥陶统烃源岩。

Abstract: The Halahatang sag in Tarim basin is abundant in petroleum resources with the proved reserves over one hundred million tons. In order to confirm the major source rocks of Ordovician reservoirs in Halahatang sag, systematic geochemical analyses are performed for oil samples from Well ZS1 and Halahatang sag and characteristics of light hydrocarbons and biomarkers are further studied. The results show that the Halahatang oil samples are characterized by high content of n-alkanes and poor content of aromatic hydrocarbons, which are similar to those of oil samples from Well ZS1, indicating the typical sapropelic origin. The aryl isoprenoid compounds detected in the oil samples from Halahatang sag are the markers for strong reducing sedimentary environment. Combined with the characteristics of source rocks and geological settings in Halahatang sag, it is considered that the marine oil in the study area mainly originates from the Cambrian to Lower Ordovician source rocks instead of the Middle to Upper Ordovician source rocks

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