石油学报 ›› 2013, Vol. 34 ›› Issue (增刊二): 15-23.DOI: 10.7623/syxb2013S2002

• 地质勘探 • 上一篇    下一篇

渤海蓬莱9-1大型复合油田地质特征与发现意义

夏庆龙, 周心怀, 王昕, 刘朋波, 官大勇   

  1. 中海石油(中国)有限公司天津分公司 天津 300452
  • 收稿日期:2013-07-03 修回日期:2013-10-23 出版日期:2013-12-25 发布日期:2014-01-15
  • 通讯作者: 夏庆龙,男,1964年4月生,1986年毕业于成都地质学院,2007年获中国科学院博士学位,现为中海石油(中国)有限公司天津分公司副总经理、总地质师、教授级高级工程师,主要从事石油天然气地质综合研究及油气勘探管理工作。Email:xiaql@cnooc.com.cn
  • 作者简介:夏庆龙,男,1964年4月生,1986年毕业于成都地质学院,2007年获中国科学院博士学位,现为中海石油(中国)有限公司天津分公司副总经理、总地质师、教授级高级工程师,主要从事石油天然气地质综合研究及油气勘探管理工作。Email:xiaql@cnooc.com.cn
  • 基金资助:

    国家重大科技专项(2011ZX05023-002,2011ZX05023-006)资助。

Geological characteristics and discovery significance of large-scale and compound oilfield of Penglai 9-1 in Bohai

XIA Qinglong, ZHOU Xinhuai, WANG Xin, LIU Pengbo, GUAN Dayong   

  1. Tianjin branch of CNOOC China Limited, Tianjin 300452, China
  • Received:2013-07-03 Revised:2013-10-23 Online:2013-12-25 Published:2014-01-15

摘要:

蓬莱9-1油田是在渤海海域发现的大型复合油田,其探明石油地质储量为2.28×108m3,创造了近10年来中国单构造的勘探发现之最。油藏分布于新近纪碎屑岩和中生代侵入花岗岩,呈现埋深浅、油质稠、储量规模大的显著特点,生储盖组合匹配良好,复合整装成藏。其中位于潜山鞍部的花岗岩油藏约占储量的80 % ,受储集条件控制,风化花岗岩上部孔隙型、裂缝-孔隙型储层物性好,横向分布相对稳定,造就了“似层状”油藏模式;风化花岗岩中下部孔隙-裂缝型、裂缝型储层物性相对较差,横向非均质性强,为岩性油藏模式。该油田的发现开辟了潜山油气勘探的新领域,明确了渤东凹陷南段和边缘性庙西北洼沙河街组的油源贡献,揭示了长期活动断裂-潜山风化壳输导体系对油气富集的重要性,对类似蓬莱9-1油田的勘探,特别是中生代花岗岩潜山的勘探具有重要的借鉴意义。

关键词: 渤海海域, 蓬莱9-1油田, 中生代侵入花岗岩, 潜山“似层状”油藏模式, 输导体系

Abstract:

Penglai 9-1 oilfield, which topped single structure discovery in one decade of China with proven geological reserves of 2.28×108m3, was a large-scale compound oilfield discovered in Bohai sea area recently. Due to excellent source-reservoir-cap assemblage, oil reservoirs formed into an integrity reservoir,which distributed in clastic rock of Neogene and intrusive granites buried hill of Mesozoic and characterized by shallow burial depth, heavy oil quality, and huge reserve scale. Among the reserves, granites of shallow saddle accounts for 80 %. Affected by reservoir quality, reservoirs in the upper parts of granites formed stratiform-like reservoir model because of pore, fracture-pore type reservoir with good lateral continuity. Meanwhile, reservoirs in the middle-lower part of granites went with lithologic model due to facture, pore-facture type reservoirs with higher lateral heterogeneity. The discovery opened up a new field to exploration of buried hill, specified oil contribution of Shahejie Formation from southern part of Bodong depression and northern part of Miaoxi sub-sag, revealed the importance of passage system made up of active faults of long period and granites weathering crust to the oil accumulation, showed significant reference to exploration of Penglai 9-1 oilfield-like, especially granites buried hill of Mesozoic.

Key words: Bohai sea area, Penglai 9-1 oilfield, intrusive granites of Mesozoic, stratiform-like reservoir model of buried hill, passage system

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