摘要
提出了一种利用测井资料计算最小和最大水平应力剖面的新方法。新方法基于成像测井资料对井壁破坏形式的准确判别来约束反演地层应力大小,不仅可以得到最小水平应力剖面而且可以得到最大水平应力剖面,由此计算出地层破裂压力和坍塌压力剖面,有助于井眼稳定性分析和压裂设计。介绍了计算原理以及计算方法中的水平应力的计算模型、最大水平应力和最小水平应力值的确定。给出了应用实例的分析。
Proposed is a new method to calculate the maximum and minimum horizontal stress using log data. Based on the theoretic model, formation stress may be derived from constraint inversion method with use of imaging data of borehole collapse and hydaulic fractures, in such away that not only the maximum horizontal stress profile but also the minimum one can be obtained, and further the formation breaking pressure, which is helpful to borehole stability analysis and fracturing design. Introduced are principle of estimating the two stresses and application examples.
出处
《测井技术》
CAS
CSCD
2005年第1期82-83,89,共3页
Well Logging Technology
关键词
成像测井
测井资料
地层应力
最大水平主应力
最小水平主应力
井眼崩落
压裂缝
imaging logging
log data
formation stress
maximum horizontal stress
minimum hori-zontal stress
wellbore breakout
hydraulic fracture
