西南石油大学学报(自然科学版) ›› 2001, Vol. 23 ›› Issue (6): 6-6–8.DOI: 10.3863/j.issn.1000-2634.2001.06.02

• 地质勘探 • 上一篇    下一篇

准噶尔盆地西北缘玛北油田油源分析

王绪龙 康素芳
  

  1. (中国石油新疆油田公司勘探开发研究院,新疆 克拉玛依 834000)
  • 收稿日期:2001-04-02 修回日期:1900-01-01 出版日期:2001-12-20 发布日期:2001-12-20

ON THE OIL SOURCE OF THE MABEI OILFIELD,NORTHWEST JUNGGAR BASIN

WANG Xu-long KANG Su-fang.   

  1. (Exploration and Development Institute, Xinjiang Oilfield Company, Karamay Xinjiang 834000, China)
  • Received:2001-04-02 Revised:1900-01-01 Online:2001-12-20 Published:2001-12-20

摘要:

准噶尔盆地玛北油田原油三环二萜烷C20、C21和C23的分布型式(上升型、山峰型、下降型和山谷型)与Pr/Ph、碳同位素、Ts/Tm、成熟度等存在良好关系。不同分布型式的原油在空间上具有上升型分布于油藏高部位,下降型分布于低部位的特点。表征三环二萜烷分布型式的C20/C23与试油获得的原油产量存在正相关,与原油密度存在负相关。综合分析得出,油气成藏顺序是上升型原油在先,下降型原油在后,山谷型原油是上升型和下降型原油混合的结果,上升型分布原油主要是下二叠统风城组烃源岩的贡献、下降型分布原油主要是下二叠统佳木河组烃源岩的贡献。

关键词: 准噶尔盆地, 玛北油田, 油源, 三环二萜烷

Abstract:

The distribution patterns (ascending, descending, peaked, and valley-like) of C20, C21and C23tricyclic diterpanes in oils from Mabei oilfield of Junggar basin are well related with other geochemical indices such as Pr/Ph, carbon isotope, Ts/Tm and thermal maturity. Mabei oil reservoirs are characterized by the spatial occurrence of ascending-patterned oils above descending patterned oils. Tricyclic diterpanes C20/C23which represents distribution patterns increase with testing oil productions and decrease with oil densities. The authors believe that ascending-patterned oils generated from Permian Fengcheng Formation was entrapped earlier than descending-patterned oils from Permian Jiamuhe Formation, and valley-patterned oils represent a mixture of the ascending-and descending-patterned oils.

Key words: Junggar basin, Mabei oilfield, oil source, tricyclic diterpanes, distribution pattern

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