石油学报 ›› 2008, Vol. 29 ›› Issue (3): 345-349.DOI: 10.7623/syxb200803006

• 地质勘探 • 上一篇    下一篇

东濮凹陷东营组原油地球化学特征与成藏期分析

张云献1,2, 沈忠民1, 王英2, 刘海燕2   

  1. 1. 成都理工大学油气藏地质及开发工程国家重点实验室 四川 成都 610059;
    2. 中国石化中原油田分公司 河南 濮阳 457001
  • 收稿日期:2007-07-13 修回日期:2007-09-24 出版日期:2008-05-25 发布日期:2010-05-21
  • 作者简介:张云献,男,1965年5月生,1987年毕业于北京大学,现为成都理工大学在读博士研究生,中国石化中原油田分公司高级工程师,主要从事油藏地球化学与成藏动力学研究工作.E-mail:zxy717617@sohu.com
  • 基金资助:
    中国石油化工集团公司科技攻关项目(P06015)"东濮凹陷浅层油气成藏条件及分布规律研究"资助.

Analysis of geochemical characteristics and oil accumulation period in Dongying Formation of Dongpu Sag

ZHANG Yunxian1,2, SHEN Zhongmin1, WANG Ying2, LIU Haiyan2   

  1. 1. State Key Laboratory for Oil-Gas Reservoir Geology and Exploitation, Chengdu University of Technology, Chengdu 610059, China;
    2. Sinopec Zhongyuan Oilfield Company, Puyang 457001, China
  • Received:2007-07-13 Revised:2007-09-24 Online:2008-05-25 Published:2010-05-21

摘要: 东濮凹陷北部地区下第三系浅层东营组有丰富的油气藏,但对其认识还相对较薄弱。通过对研究区储层流体包裹体的分析,并结合东营组原油的地球化学特征及构造演化资料,对东营组油藏的形成历史进行了研究。结果表明:东营组原油密度大、黏度高、成熟度低,其母质来源以湖相低等水生生物为主,形成于咸化度较高的强还原环境。文留地区东营组曾发生过2期油气充注:第一期为东营组中后期(距今21~24 Ma);第二期发生在第四纪(距今1.75 Ma)之后。第一期为油藏主要形成期,原油来源于下部沙三段盐湖相烃源岩,为下生上储型油藏,埋深大于2 000 m的油藏保存较好。

关键词: 东濮凹陷, 地球化学特征, 油气成藏期, 原油, 烃源岩, 流体包裹体

Abstract: There are abundant oil and gas in the lower Tertiary shallow layer of Dongying Formation in the northern Dongpu Sag.According to some geological and geochemical data of the studied region,including the homogenization temperature of fluid inclusion,the geochemical characteristics of crude oil and the evolution of fault,the hydrocarbon accumulation history in Dongying Formation was analyzed.The result shows that crude oil in Dongying Formation has the properties of high density,high viscosity and low maturity.The kerogen mainly came from the low aquatic hydrobiont in lake and formed in the environment of high salty and strong reduction.There occurred two charging periods of oil-gas in Dongying Formation of Wenliu area.The first stage of oil accumulation process occurred in the middle-late stage of Dongying Formation (from 21 Ma to 24 Ma before present),and the second stage happened after the Quaternary period (at 1.75 Ma before present).The first stage is the main generating period for oil reservoir which is down-genetic upper-stored type.Oil was from source rocks of salt-lake facies in the lower third member of Shahejie Formation.The reservoir with buried depth over 2 000 m is well preserved.

Key words: Dongpu Sag, geochemical characteristics, oil-gas accumulation period, crude oil, source rock, fluid inclusion

中图分类号: