测井技术2013，Vol.37Issue(2)：191-195,5.
川西须家河组地层井壁稳定性测井评价
Log Evaluation of Borehole Stability in West Sichuan Xujiahe Formation
陈俊 1徐炳高 1何传亮 1周怀容2
作者信息
- 1. 中国石化集团西南石油局测井公司,四川成都610100
- 2. 长江大学,湖北武汉430100
- 折叠
摘要
Abstract
According to different wellbore instability phenomena,such as lost circulation,hole collapse,blowout,etc,this article analyzes in detail the reason of the borehole instability in the Xujiahe formation in west Sichuan.It is considered that inappropriate well drilling mud density is the fundamental reason for drilled borehole instability.In the process of drilling,formation stress concentrates around the borehole,when the properties of drilling fluid fail to balance the borehole stress effectively,the borehole stability cannot keep up.Using the log data,we calculate the rock mechanics parameters and rock strength parameters,and on this basis calculate the crustal stress and three pressures (formation pressure,burst pressure,caving pressure).We determine a reasonably safe mud density window value for separate block and stratigraphic position.Practical applications in 11 layers of 3 wells show that safe mud density window values calculated with our method are reasonable and acceptable,and may provide effective guidance for drilling engineering design.关键词
测井评价/井壁失稳/泥浆密度/岩石力学参数/地层应力/须家河组Key words
log evaluation/borehole instability/mud density/rock mechanic parameter/stratum stress/Xujiahe formation分类
天文与地球科学引用本文复制引用
陈俊,徐炳高,何传亮,周怀容..川西须家河组地层井壁稳定性测井评价[J].测井技术,2013,37(2):191-195,5.
