西南石油大学学报(自然科学版) ›› 2000, Vol. 22 ›› Issue (2): 18-20.DOI: 10.3863/j.issn.1000-2634.2000.02.06

• 石油工程 • 上一篇    下一篇

大港探区下古生界奥陶系烃源岩地化特征

姜平1 于学敏1

  

  1. 1.大港油田集团地质勘探开发研究院,天津 300280
  • 收稿日期:1999-11-18 修回日期:1900-01-01 出版日期:2000-04-20 发布日期:2000-04-20
  • 通讯作者: 姜平

RESERVOIR GEOCHEMICAL CHARACTERISTIC OF THE SOURCE ROCKS IN LOW PALEOZOIC IN DAGANG REGION

JIANG Ping1 YU Xue-min1   

  1. Dagang Oilfield Group LTD
  • Received:1999-11-18 Revised:1900-01-01 Online:2000-04-20 Published:2000-04-20
  • Contact: JIANG Ping

摘要:

通过油源对比发现位于大港探区孔西潜山构造的孔古3井油源来自奥陶系烃源岩,进一步的地球化学分析表明;奥陶系碳酸盐岩平均有机碳含量为0.14%,平均氯仿沥青“A”含量为0.11%,平均总烃含量57.6 ppm,已达到生油岩有机质丰度下限值,部分样品已达到好较好生油岩的有机质丰度指标;干酪根类型主要为Ⅱ1型、Ⅰ1型和Ⅱ2型;大部分样品有机质已处于高成熟~成熟演化阶段。大港探区下古生界奥陶系地层分布广泛,这为大港探区寻找古生界原生油气藏奠定了基础,预示着大港探区古生界原生油气藏具有广阔勘探前景。

关键词: 烃源岩, 评价, 地化特征, 奥陶系, 大港探区

Abstract:

Well Kong 3 is located in Kong buried ancient mountain structure in dagang exploration region, research shows that oil in the well is from source rocks of Ordovician, geochemical analysis indicates that the average organic carbon of Ordovician limestone is 0.14%, chloric bitumen A is 0.11%, total hydro carbon is 57.6 ppm, which means bottom limits of organic rich ness of source rock have been reached, and data from some rocks have been ranked in good to relatively good range. The kerogen is mainly typeⅡ1,Ⅰ1andⅡ2, most of organic samples belongs to matured to highly matured evolution. This shows an important significance for exploration of primitive reservoir in dagong region.

Key words: source rock, evaluation, geochemical characteristics, Ordovician, Dagang region

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