石油学报 ›› 2006, Vol. 27 ›› Issue (6): 24-27,33.DOI: 10.7623/syxb200606005

• 地质勘探 • 上一篇    下一篇

酒西坳陷下白垩统新油源层研究

熊英1, 程克明1, 马立元2   

  1. 1. 中国石油勘探开发研究院 北京 100083;
    2. 中国科学院兰州地质研究所 甘肃兰州 730000
  • 收稿日期:2005-12-20 修回日期:2006-03-15 出版日期:2006-11-25 发布日期:2010-05-21
  • 作者简介:熊英,女,1972年8月生,2000年获中国石油勘探开发研究院博士学位,现为中国石油勘探开发研究院高级工程师,主要从事石油地质及油气地球化学研究.E-mail:xiong_ying@petrochina.com.cn

New source rock found in the Lower Cretaceous of Jiuxi Depression

Xiong Ying1, Cheng Keming1, Ma Liyuan2   

  1. 1. PetroChina Exploration and Development Research Institute, Beijing 100083, China;
    2. Lanzhou Institute of Geology, Chinese Academy of Sciences, Lanzhou 730000, China
  • Received:2005-12-20 Revised:2006-03-15 Online:2006-11-25 Published:2010-05-21

摘要: 油源研究表明,酒西坳陷下白垩统有两类生物标记物特征差异较大的原油,即Ⅰ类原油和Ⅱ类原油。根据这两类原油生物标记物所指示的沉积环境、水体介质、可能的母源前身物和热成熟度等参数的对比及其所揭示的地质地球化学含义,Ⅰ类原油主要源于下白垩统下沟组泥质白云岩,青西凹陷下白垩统赤金堡组白云质泥岩和泥质白云岩是Ⅱ类原油的主要源岩。结合该区的地质条件分析结果表明,青西凹陷下白垩统赤金堡组是该区新的油源层。

关键词: 酒西坳陷, 下白垩统, 生物标记物, 油源对比, 沉积环境, 地质条件

Abstract: The study of oil-source rock showed that Jiuxi Depression developed two types of crude oils with different types of biomarker respectively, namely type I and type Ⅱ crude oils. Different biomarkers can indicate different parameters such as depositional environment, water medium, possible precursor organisms and heat maturity. The comparison of all parameters and their revealing geo-chemical meanings showed that type Ⅰ crude oil originally came from shale dolomitite developed in Xiagou Formation of the Lower Cretaceous,and type Ⅱ crude oil originally came from Chijinpu Formation of the Lower Cretaceous in Qinxi Sag.The comprehensive regional geology indicates that Chijinpu Formation of the Lower Cretaceous in Qinxi Sag is new source rock strata.

Key words: Jiuxi Depression, Lower Cretaceous, biomarker, oil-source rock correlation, depositional environment, geological condition

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