石油学报 ›› 2002, Vol. 23 ›› Issue (2): 11-15.DOI: 10.7623/syxb200202003

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柴达木盆地北缘典型构造断层封闭性与天然气成藏

洪峰1, 宋岩1, 余辉龙2, 陶士振1, 谭彦虎2   

  1. 1. 中国石油勘探开发科学研究院,北京,100083;
    2. 青海油田研究院,甘肃敦煌,736202
  • 收稿日期:2000-09-18 修回日期:2001-03-18 出版日期:2002-03-25 发布日期:2010-05-21
  • 作者简介:洪峰,男,1962年3月生,1986年毕业于中山大学地质学系,现从事天然气地质与勘探研究工作.
  • 基金资助:
    国家科技攻关项目(99-110)部分成果.

The fault sealability of typical structures and gas pool formed in north edge of Qaidam Basin

HONG Feng1   

  1. Research Institute of Petroleum Exploration and Development of China, Beijing 100083, China
  • Received:2000-09-18 Revised:2001-03-18 Online:2002-03-25 Published:2010-05-21

摘要: 柴达木盆地北缘冷湖五号二高点构造深部42号、浅部Ⅰ号断层和南八仙构造深部仙南、浅部仙北断层对成藏起主要控制作用,通过地质分析和数理评价发现,这两个构造断层的封闭性具有明显的差异:冷湖五号构造深部断层比浅部断层侧向封闭性好,南八仙构造浅部断层比深部断层侧向封闭好;不同构造深浅部对应的断层中,冷湖五号构造比南八仙构造的断层具更强的垂向封闭.南八仙构造仙南断层垂向封闭性较小,开启期发生于油气成熟到生烃高峰期,起通道作用,仙北断层具下开上闭性,有利成藏.

关键词: 柴达木盆地, 断层, 封闭, 天然气, 涂抹系数

Abstract: The plutonic fault-42,shallow fault-Ⅰin culmination-2 in Lenghu-5 structure,plutonic Xiannan fault and shallow Xianbei fault in Nanbaxian structure play a principal role in gas pool forming in north edge of Qaidam Basin.According to geological analysis and mathematical estimation,the fault sealability in those two structures shows obvious diversity:the lateral sealability of plutonic fault is better than that of the shallow one in Lenghu-5 structure;the lateral sealability of shallow fault is better than that of the plutonic one in Nanbaxian structure.The vertical sealability in Lenghu-5 structure is stronger sealability than that in Nanbaxian structure in corresponding depth in different structure synthem.The vertical sealability of Xiannan fault in Nanbaxian structure is relative inferior,which stretch as channel-way of oil-gas from maturation period of oil-gas to peak-period of hydrocarbon generation.Xianbei fault is patulous lower and obturation upper which is adventageous to gas pool formation.

Key words: Qaidam Basin, fault, sealability, natural gas, paint factor

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