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天然气地球科学

• 天然气地质学 • 上一篇    下一篇

塔北西部玉东地区奥陶系油气成藏条件与勘探潜力

周俊峰，张虎权，余建平，朱永峰，姚清洲，袁玉春   

  1. (1.中国石油勘探开发研究院西北分院，甘肃 兰州730020；
    2.中国石油塔里木油田公司勘探开发研究院，新疆 库尔勒 841000)
  • 收稿日期:2015-05-26 修回日期:2015-08-16 出版日期:2015-09-20 发布日期:2015-09-20
  • 作者简介:周俊峰(1979-)，男，湖北钟祥人，工程师，硕士，主要从事石油地质综合研究. E-mail：cug1118@sina.com.cn.
  • 基金资助:

    中国石油集团重大专项（编号：2011ZX05004-04）资助.

Analysis of the Hydrocarbon Accumulation Conditions and Exploration Potential in the Ordovician in Yudong Area of West Tabei Uplift

ZHOU Jun-feng，ZHANG Hu-quan，YU Jian-ping，ZHU Yong-feng，YAO Qing-zhou，YUAN Yu-chun   

  1. (1.Research Institute of Exploration and Development-Northwest,PetroChina,Lanzhou 730020,China；
    2.Exploration and Development Research Institute,Tarim Oilfield Company,PetroChina,Korla 841000,China)
  • Received:2015-05-26 Revised:2015-08-16 Online:2015-09-20 Published:2015-09-20

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摘要：

塔北西部玉东地区奥陶系未获得油气突破。对该区油气成藏条件认识不明确，其勘探潜力不落实。通过对玉东地区构造、成藏演化分析，明确了鹰山组碳酸盐岩岩溶储集体在晚海西期形成准层状古油藏，后期的构造抬升仅造成构造高点油藏破坏，对分布于围斜部位缝洞型油藏影响不大。通过对源岩条件、储盖组合及圈闭条件等成藏因素综合评价，估算了奥陶系碳酸盐岩的油气勘探潜力，明确玉东地区是塔里木盆地重要的油气战略接替区。

关键词: 勘探潜力, 成藏条件, 玉东地区, 塔里木盆地

Abstract:

In the Ordovician there has been no discovery and break through of oil and gas in Yudong area of western Tabei.Previous studies suggested that there is no accumulation,or reservoir has been destroyed in the Yudong area,and there is no exploration potential.To further explore the hydrocarbon potential of carbonate rocks in the Karayulgun structural belt of west Tabei Uplift,according to the question in previous studies,this research carries out detailed analysis of the Ordovician oil-gas accumulation conditions in the Yudong area based on the relationship between structure and accumulation of hydrocarbon.On the basis of the analysis of fine structure interpretaion and evolution,it is clear that the Yudong structure was mainly formed in Late Hercynian.Affected by the Karayulgun fault sustained activity,the Yudong tectonic uplifted,the strata have suffered variable degrees of erosion.The analytical results of reservoir formation conditions show that the karst reservoirs in the Yingshan Formation could capture oil and gas generated in Late Hercynian,and form quasi-layered oil deposits distributing along the Ordovician reservoir.Reservoirs in the high position were eroded during the later stages of tectonic uplifting,but other lower structural positions relative to the Yudong 2 were still relatively high area.They not only avoided the erosion during the later stages of tectonic uplifting,but alsowere in a favorable position during the later adjustment of the reservoir.Considering the source rock condition,structure,reservoir cap assemblage and igneous influence,the authors think Yudong has similar reservoir conditions as Yingmai 2,and both are quasi-layered reservoir controlled by fracture and cave karst reservoir with great exploration potential.

Key words: Exploration potential, Reservoir forming conditions, Yudong, Tarim Basin

中图分类号: 

  • TE122.3

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