石油学报 ›› 2007, Vol. 28 ›› Issue (4): 26-30.DOI: 10.7623/syxb200704005

• 地质勘探 • 上一篇    下一篇

塔里木盆地中央隆起带奥陶系碳酸盐岩台缘带油气富集特征

杨海军1,2, 邬光辉2, 韩剑发2, 王晓丰2, 吉云刚2   

  1. 1. 中国地质大学资源学院 湖北武汉430074;
    2. 中国石油塔里木油田勘探开发研究院 新疆库尔勒841000
  • 收稿日期:2006-04-25 修回日期:2007-01-23 出版日期:2007-07-25 发布日期:2010-05-21
  • 作者简介:杨海军,男,1970年12月生,1992年毕业于石油大学(华东),现为塔里木油田分公司勘探开发研究院高级工程师,中国地质大学(武汉)在读博士研究生,主要从事油气综合勘探与石油地质研究.E-mail:yhjun701205@163.com
  • 基金资助:
    国家“十五”重点科技攻关项目(2004BA616A02)

Characteristics of hydrocarbon enrichment along the Ordovician carbonate platform margin in the central uplift of Tarim Basin

Yang Haijun1,2, Wu Guanghui2, Han Jianfa2, Wang Xiaofeng2, Ji Yungang2   

  1. 1. College of Resources, China University of Geosciences, Wuhan 430074, China;
    2. Research Institute of Exploration and Development, Petro China Tarim Oilfield Company, Kuerle 841000, China
  • Received:2006-04-25 Revised:2007-01-23 Online:2007-07-25 Published:2010-05-21

摘要: 在塔里木盆地塔中地区发现了中国最大的奥陶系生物礁型碳酸盐岩油气藏,油气沿塔中隆起北部上奥陶统碳酸盐岩台缘相带展布,为无明显边底水、油气水分布复杂的非常规油气藏。对油气成藏条件与油气富集规律研究表明,塔中上奥陶统良里塔格组发育大型镶边台地边缘礁滩相沉积系统;礁滩体储层纵向叠置、横向连片,沿塔中Ⅰ号构造带台地边缘广泛分布,并以次生溶蚀孔洞形成的低孔隙、低渗透储层为主;三期油气充注与成藏形成了巨大的资源潜力,沿台缘带形成大面积、低丰度准层状礁滩型岩性油气藏。大型台缘相带控制了塔中Ⅰ号构造带的油气运聚成藏,储层是油气富集的主控因素,多期油气成藏与储层非均质性造成了油气赋存的差异性。

关键词: 塔里木盆地, 奥陶系, 碳酸盐岩, 台缘相带, 油气藏, 形成条件, 油气富集规律

Abstract: The largest Ordovician reef-type oil and gas reservoir discovered in China is distributed along the Upper Ordovician carbonate platform margin in the northern of central uplift of Tarim Basin.It is an unconventional hydrocarbon reservoir with complicated oil-gas-water distribution and without obvious edge water and bottom water.The analyses on forming condition and enrichment law of the reservoir showed that a large rimed carbonate platform margin system was formed,and multi-phases depositions of reefs,banks and limemud mounds were developed in the early stage of the Late Ordovician along the northern margin of central uplift.The vertically superimposed and laterally connected reef-type reservoir was distributed widely along the platform margin of Tazhong No.1 structural belt and has many kinds of secondary corrosion voids characterized by low porosity and low permeability.Three major stages of hydrocarbon activities were accountable for the abundant hydrocarbon accumulation.The low-abundance reef-bank type lithologic reservoirs were distributed along the margin tectonic zone.The carbonate platform margin controlled the hydrocarbon migration and accumulation,and a large hydrocarbon-enriched belt was formed.The oil-gas enrichment was mainly controlled by reservoirs.The difference of oil and gas occurrence was caused by multi-stage hydrocarbon accumulation and heterogeneity of reservoirs.

Key words: Tarim Basin, Ordovician, carbonate rock, platform margin, oil-gas reservoir, forming condition, oil-gas enrichment law

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