石油学报 ›› 2005, Vol. 26 ›› Issue (3): 16-20.DOI: 10.7623/syxb200503003

• 地质勘探 • 上一篇    下一篇

准噶尔盆地陆西地区不整合与油气成藏的关系

牟中海1, 何琰1, 唐勇2, 陈世加1, 浦世照2, 赵卫军1   

  1. 1. 西南石油学院 四川成都 610500;
    2. 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:2004-10-14 修回日期:2004-12-15 出版日期:2005-05-25 发布日期:2010-05-21
  • 作者简介:牟中海,男,1960年6月生,1982年毕业于西北大学地质系,现为西南石油学院教授,主要从事地震资料解释与石油地质综合研究的教学与科研工作.E-mail:mzhllmxy@163.com

Relation of unconformity with hydrocarbon accumulation in Luxi area of Junggar Basin

MU Zhong1, HE Yan1, TANG Yong2, CHEN Shi1, PU Shi2, ZHAO Wei1   

  1. 1. Southwest Petroleum Institute, Chengdu 610500, China;
    2. Research Institute of Petroleum Exploration and Development, Xinjiang Oilfield Company, CNPC, Kelamayi 834000, China
  • Received:2004-10-14 Revised:2004-12-15 Online:2005-05-25 Published:2010-05-21

摘要: 论述了陆西地区不整合类型与控油特征、不整合结构类型与油气运聚特征、油气沿不整合面运移的证据以及不整合-断层运聚体系的成藏模式。陆西地区存在上超-削蚀型、上超-整一型、整一-削蚀型和整一-整一型4种不整合类型,其中上超-削蚀型和整一-削蚀型不整合对油气聚集最有利。在陆西地区有6种不整合结构类型,其中Ⅰ、Ⅱ型对油气的运移、聚集最有利。二叠系各层系顶界和三叠系顶界不整合面上油气的运移发生于陆西斜坡区,西山窑组顶界和侏罗系顶界不整合面上油气的运移主要发生在隆起区。陆西地区存在源边—不整合—斜坡—环带状和源外—不整合—断控—阶状2种成藏模式。由此可见,与不整合有关的地层油气藏的有利勘探目标区主要位于陆西斜坡区、三个泉油田与石南油田接合处及三南凹陷南段。

关键词: 准噶尔盆地, 陆西地区, 不整合面, 油气运移, 油气成藏模式, 有利勘探目标

Abstract: The unconformity type and control oil characteristics,unconformity structural type and oil-gas migration-accumulation characteristics,evidence of oil-gas migration along unconformity surface and the hydrocarbon accumulation patterns of unconformity-fault migration-accumulation system in Luxi area of Junggar Basin were discussed.There are four types of unconformity including onlap-erosional truncation type,onlap-concordance type,concordance-erosional truncation type,concordance-concordance type.The onlap-erosional truncation type and concordance-erosional truncation type are the most favorable for oil and gas accumulation. There are six types of structural layers of unconformity.Among them,the type I and type II are the most favorable for oil-gas migration and accumulation.The migration of oil and gas at top boundary unconformity of all strata of the Permian system and the Triassic system only existed in the slope of Luxi area. The migration of oil and gas at top boundary unconformity of Xishanyao Formation and Jurassic system mostly existed in the uplift of Luxi area.There are two reservoir patterns including side of source-unconformity-slope-zone type and outside of source-unconformity-fault control-steps type in Luxi area.The favorable objects of reservoir in the stratum relative with unconformity include the slope of Luxi area,the jointing area of Sangequan Oilfield and Shinan Oilfield,and the southern member of Shannan Depression in Junggar Basin.

Key words: Junggar Basin, Luxi area, unconformity surface, oil and gas migration, hydrocarbon accumulation pattern, favorable exploration object

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