• 责任者：Wang Huan (Key Laboratory of Petroleum Resources Research ; Chinese Academy of Sciences ; Lanzhou 730000 ; China) ; Wang Qi
• 刊名：Natural Gas Geoscience
• 出版年：2011
• 卷期：22(5)
• 关键词：盖层 ; cap rocks ; 琼东南盆地 ; Qiongdongnan Basin
• 页码：p.770-777
• 图表：4 illus., 3 tables, 20 refs.
• 分类号：1003
• 出版序号：20122505
• issnNo：ISSN1672-1926
• isbnNo：CN62-1177/TE

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. The authors 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 1 311~1 552 m height of gas column in the sandstone of the third member of Lingshui Formation.