石油学报 ›› 2006, Vol. 27 ›› Issue (S1): 42-46.DOI: 10.7623/syxb2006S1008

• 地质勘探 • 上一篇    下一篇

松辽盆地徐家围子断陷深层天然气成藏期研究

李景坤1,2, 冯子辉2, 刘伟2, 宋兰斌2, 舒萍2   

  1. 1. 中国地质大学 北京 100083;
    2. 大庆油田有限责任公司勘探开发研究院 黑龙江大庆 163712
  • 收稿日期:2006-07-25 修回日期:2006-10-30 出版日期:2006-12-25 发布日期:2006-12-25
  • 作者简介:李景坤,男,1961年8月生,1989年获大庆石油学院硕士学位,现为大庆油田有限责任公司勘探开发研究院高级工程师,中国地质大学(北京)矿产普查与勘探专业在读博士研究生,主要从事有机地球化学研究和油气资源评价工作.E-mail:lijingkun@petrochina.com.cn
  • 基金资助:
    中国石油天然气股份有限公司科技攻关项目"中石油油气预探项目"(20040101)资助.

Research on reservoir-forming time of deep natural gas in Xujiaweizi faulted-depression in Songliao Basin

Li Jingkun1,2, Feng Zihui2, Liu Wei2, Song Lanbin2, Shu Ping2   

  1. 1. China University of Geosciences, Beijing 100083, China;
    2. Research Institute of Exploration and Development, PetroChina Daqing Oilfield Company Ltd., Daqing 163712, China
  • Received:2006-07-25 Revised:2006-10-30 Online:2006-12-25 Published:2006-12-25

摘要: 热指标反演恢复表明,松辽盆地徐家围子断陷兴城地区古热流值在距今65Ma时达到最大值96.3mW/m2,同时平均地温梯度高达5.0℃/hm。盆地模拟计算结果表明,徐家围子断陷烃源岩从距今110Ma开始快速生气,在距今95Ma和75Ma出现了两次显著的生气高峰。火山岩储层包裹体均一温度显示,徐深1井营城组天然气成藏温度为115℃~186℃。包裹体均一温度和储层热演化史综合分析表明,徐家围子断陷兴城地区深层天然气成藏期是距今103~60Ma,即成藏期出现在登娄库组盖层形成以后,这对该地区深层天然气的保存比较有利。

关键词: 徐家围子断陷, 大地热流, 生气高峰, 包裹体, 均一温度, 成藏期

Abstract: Maximum paleoheat flux is 96.3mW/m2 and the average geothermal gradient is 5.0℃/hm at 65Ma bp in Xingcheng area of Xujiaweizi faulted-depression in Songliao Basin according to thermal indictors inversion. The result of basin modeling and calculating indicates that natural gas of hydrocarbon sources was quickly generated from 110Ma bp and two obvious gas-generating peaks occurred in individually 95Ma bp and 75Ma bp in Xujiaweizi faulted-depression. Homogenization temperatures of inclusion in the volcanic reservoirs prove that reservoir-forming temperature range of natural gas in Yingcheng Formation in Xushen1 Well is from 115℃ to 186℃. The synthetic analysis of the inclusion homogenization temperatures and reservoir thermal-evolution history indicates that reservoir-forming time of the deep natural gas in Xingcheng area of Xujiaweizi faulted-depression are about from 103Ma bp to 60Ma bp. The reservoir-forming time occurred after the deposition of Denglouku Formation which is cap rock, which is of advantage to conservation of deep natural gas in this area.

Key words: Xujiaweizi faulted-depression, geothermal flow, gas-generating peak, inclusion, homogenization temperature, reservoir-forming time

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