摘要
在钻井过程中，保持井眼稳定性是保证正常钻进的基础。而随钻井眼稳定性评价，由于其实时性，能够及时反映井眼情况，从而，得到越来越多的重视。岩石力学参数是随钻井眼稳定性评价的基础参数，所以，建立岩石力学参数随钻评价模型，成为此项工作的核心。利用混合理论，在充分认识岩石物理性质影响因素的基础上，通过分析微结构对岩石物理性质特别是力学、声学及电学性质的重要影响，对现场测井资料进行统计分析，得到岩石的波速与岩石不同探测深度电阻率对数的比值存在线性关系，提出了利用随钻测井的电阻率资料进行地层岩石力学参数评价的模型。并将建立的模型应用于某地区的岩石力学参数及井眼稳定性评价中，现场应用取得了很好的效果。
During drilling well, keeping wellbore stability is very important for drilling normally. More and more importance is attracted to the wellbore stability evaluation while drilling, because it can reveal the wellbore status real-time. And rock mechanical parameters are essential to the wellbore stability evaluation, so developing the model of rock mechanical parameters evaluation while drilling becomes core of the work. On the basis of the mixture theory, the influence factors of rock physical properties are entirely recognized, and the important influences of microstructure on rock physical properties, especially on mechanics, acoustic velocity and resistivity property, are analyzed. Statistical analysis of field logging data is progressed, consequently a linear relationship between rock acoustic velocity and ratio of logarithmic resistivity at different detecting depth is obtained. On this basis, the model of rock mechanical parameters evaluation with LWD（logging while drilling） formation resistivity data is developed. The model is applied in evaluation of rock mechanics and wellbore stability in some areas, and it wins a good effect.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2005年第A01期5168-5172,共5页
Chinese Journal of Rock Mechanics and Engineering
关键词
石油工程
岩石电阻率
随钻测井
岩石力学参数
混合理论
井眼稳定性
petroleum engineering
rock resistivity
logging while drilling
rock mechanical parameter
mixture theory
wellbore stability
