摘要
介绍了井孔周围地应力的分布状态及在井壁上地层应力的表述方程式 ,分析了地层应力变化对井壁的破坏作用 ,讨论了井壁在受到拉张及压缩应力作用下的破坏机理 ,给出了井孔的拉张及压缩破坏准则 ,进一步分析了安全钻井的最大最小泥浆密度。用声波全波测井资料计算地应力以分析有关岩石物性参数的方法技术 ,对华北地区某口井的实测全波测井资料进行了处理解释 ,取得了比较好的。
This paper discusses the stress distribution around a borehole and expression of stress at borehole wall, and analyzes the damaging effect of earth stress on borehole wall and damaging mechanism of borehole wall under extensional and compressional stresses. The criterion of damage for borehole wall under extension and compression is presented, and the lower and upper limits of mud density for drilling safety are derived. The method has been applied in the data processing and interpretation of full-wave acoustic logging data from a well in north China. Satisfactory results have been achieved.
出处
《石油物探》
EI
CSCD
2003年第2期271-275,共5页
Geophysical Prospecting For Petroleum
关键词
地应力
地层应力
井壁
破坏机理
井孔
泥浆密度
声波全波测井
测井资料
stress distribution
criterion of damage for borehole wall
full-wave acoustic longing
petrophysical parameter
