Synthetically and Quantitatively Assessing Gas-Sealing Ability of Volcanic Cap Rocks in the Xujiaweizi Sag of the Songliao Basin
详细信息
- 责任者：Shi Jijian (College of Earth Science ; Northeast Petroleum University ; Daqing 163318 ; China) ; Lü Yanfang
- 刊名：Acta Petrolei Sinica
- 出版年：2011
- 卷期：32(3)
- 关键词：结晶岩类储集层 ; crystalline reservoirs ; 盖层 ; cap rocks ; 松辽平原 ; Songliao Plain
- 页码：p.424-431
- 图表：10 illus., 1 table, 15 refs.
- 分类号：1003
- issnNo：ISSN0253-2697
- isbnNo：CN11-2128/TE
摘要
The paper studied 14 gas reservoirs in the Xujiaweizi rift Sag, Songliao Basin thoroughly and the result showed that volcanic rocks in the top of the first member of Yingcheng Formation, composed mainly of tuff and volcanic breccia with a thickness between 0 and 80 cm, were characterized by high interval transit time and enlarged borehole diameter, and locally formed a suite of good cap rocks. Consequently, a method was established for synthetically assessing gas-sealing ability of these volcanic rocks based on factors impacting on gas-sealing ability of volcanic cap rocks, such as, thickness, displacement pressure, vertical sealing of faults, viscidity of natural gases and pressure of gas reservoirs. A positive correlation was found between the reserve abundance of natural gases and the synthetic evaluation index.
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |