天然气地球科学 ›› 2011, Vol. 22 ›› Issue (5): 770–777.doi: 10.11764/j.issn.1672-1926.2011.05.770

• 天然气地质学 • 上一篇    下一篇

琼东南盆地陵水组二段泥岩盖层综合评价

 王欢, 王琪, 张功成, 郝乐伟, 马晓峰   

  1. 1.中国科学院油气资源研究重点实验室,甘肃 兰州  730000;
    2.中国科学院研究生院,  北京  100049;3.中海石油研究中心,北京 100027
  • 收稿日期:2010-03-29 修回日期:2011-03-17 出版日期:2011-10-10 发布日期:2011-10-10
  • 通讯作者: 王欢wanghuan19851228@163.com E-mail:wanghuan19851228@163.com
  • 作者简介:王欢(1985-),男, 北京人,助理工程师,在读硕士,主要从事矿物学、岩石学、矿床学方面的研究.
  • 基金资助:

    南海深水盆地油气资源形成与分布基础性研究(编号:2009CB219400);国土资源部全国油气资源战略调查与评价项目“南海北部陆坡深水海域油气资源战略调查与评价”(编号:XQ-2004-05);国家科技重大专项海洋深水区油气勘探关键技术(编号:2008ZX05000-025)联合资助.

Comprehensive Evaluation on Mudstone Caprock in the Second Member  of Lingshui Formation in Qiongdongnan Basin

 WANG  Huan, WANG  Qi, ZHANG  Gong-Cheng, HAO  Le-Wei, MA  Xiao-Feng   

  1. 1.Key Laboratory of Petroleum Resources Research,Chinese Academy of Sciences,Lanzhou 730000,China;
    2.Graduate University of Chinese Academy of Sciences,Beijing 100049,China;
    3.CNOOC Research Center,Beijing 100027,China
  • Received:2010-03-29 Revised:2011-03-17 Online:2011-10-10 Published:2011-10-10

摘要:

对琼东南盆地陵水组二段泥岩盖层进行宏观研究,认为盖层岩性以浅海相泥岩为主,侧向连续性好,单层厚度大,砂质含量低,但是累积厚度偏小。利用测井声波时差(DT)和实测岩石样本排替压力之间的关系计算陵水组三段砂岩和陵二段泥岩的排替压力差。通过排替压差和可封闭气藏高度公式的计算,认为陵二段泥岩可以封盖下伏陵三段砂岩储层中高1 311~1 552 m的天然气柱。选取岩性、沉积环境、最大单层厚度、累积厚度、含砂量以及储层和盖层排替压差作为参数,分别赋予相应的权重,对泥岩盖层进行综合评价,认为发育于与陵三段储层配套部位的陵二段泥岩其综合品质级别属于Ⅰ—Ⅱ类,盖层综合品质向凹陷方向递增,向凸起方向递减,并且对陵三段发育于隆凹过渡部位的砂岩起到良好的封盖作用。

关键词: 琼东南盆地, 陵水组二段, 盖层, 封闭能力, 综合评价, 排替压力

Abstract:

By macroscopic evaluation to mudstone caprock in the second member of Lingshui Formation in the Qiongdongnan basin,the caprock is composed of shallow marine mudstone with good lateral continuity,large single-layer thickness,low sandy content,and relatively small total thickness.We calculated the displacement pressure between mudstone of the second member of Lingshui Formation and sandstone of the third member of Lingshui Formation based on relationship between sonic travel time and displacement pressure.Based on formula for difference of displacement pressure and sealing ability,the mudstone of the second member of Lingshui Formation can seal the 1 311-1 552m height of gas column in the sandstone of the third member of Lingshui Formation.Selecting parameters (i.e.lithology,sedimentary environment,largest single-layer thickness,total thickness,sand content,displacement pressure difference between reservoir and caprock)

 

Key words: Qiongdongnan basin, Second member Lingshui Formation, Caprock;Sealing ability, Ccomprehensive evaluation, Displacement pressure.

中图分类号: 

  • TE122.2+5

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