摘要
超声波在岩石中的衰减特征通常用岩石吸收品质因子(Q值)来表征。Q值可以作为反映岩石物性的综合参数之一,Q值的对比可以判断油气有利的疏导和封闭方向,可以作为储层和盖层性能评估的指标之一,可以作为研究天然气生、储、盖组合的一种重要辅助手段。选择华北克拉通盆地南缘下寒武统已确认的天然气生、储、盖岩石组合,利用超声波探测,探讨了Q值在研究天然气运移封闭过程中的意义。
The ultrasonic attenuation character in the rock is usually expressed by rock absorbability quality factor (Q). Q value can be used as one of the compretensive parameters of rock physical character. Contrast of Q value can judge the advantaged leak direction and seal direction of natural gas, can be used as one of the parameters to evaluate the capability of reservoir layer and cover layer, and can be used as an important assistant method to study the assemblage of gas creation, reservoir and cover. The Cambrian substrate rocks in the south of North china craton basin, that have confirmed the assemblage of natural gas creation, reservoir and cover, are chose as subject investigated, and through ultrasonic detection technique the significance of Q value in the course of natural gas leak and seal is studied.
出处
《天然气地球科学》
EI
CAS
CSCD
2003年第5期347-350,共4页
Natural Gas Geoscience
基金
国家重点基础研究规划项目(编号:2001CB209132)
国家自然科学基金重大项目(编号:49794044)资助.
关键词
天然气运移封闭
岩石吸收品质因子
超声波探测
克拉通盆地
岩石Q值
Rock absorbability quality factor (Q)
Cambrian substrate in the south of north China craton basin
Gas leak and seal.
