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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
引用本文:杨海军,邬光辉,韩剑发,王晓丰,吉云刚.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[J].石油学报,2007,28(4):26-30.
作者姓名:杨海军  邬光辉  韩剑发  王晓丰  吉云刚
作者单位: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
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  
文章编号:0253-2697(2007)04-0026-05
收稿时间:2006-4-25
修稿时间:2006-04-252007-01-23

Characteristics of hydrocarbon enrichment along the Ordovician carbonate platform margin in the central uplift of Tarim Basin
Yang Haijun,Wu Guanghui,Han Jianfa,Wang Xiaofeng,Ji Yungang.Characteristics of hydrocarbon enrichment along the Ordovician carbonate platform margin in the central uplift of Tarim Basin[J].Acta Petrolei Sinica,2007,28(4):26-30.
Authors:Yang Haijun  Wu Guanghui  Han Jianfa  Wang Xiaofeng  Ji Yungang
Affiliation: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
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.
Keywords:Tarim Basin  Ordovician  carbonate rock  platform margin  oil-gas reservoir  forming condition  oil-gas enrichment law
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