基于测井资料的岩石抗压强度计算方法,IOP Conference Series: Earth and Environmental Science

岩石抗压强度是一个基本的岩石力学参数。而岩石抗压强度影响钻井工程中岩石的可钻性和稳定性。因此需要一种地层岩石抗压强度的计算方法来提高所获取地层信息的可靠性。从而使钻头选择、井设计和储层改造设计更加准确。通过对岩石三轴抗压强度试验数据的分析，建立了围压测井解释方法，并考虑了围压的影响，给出了基于测井数据的岩石抗压强度定量计算方法。该模型用于分析探井。结果表明，岩石抗压强度与钻孔时间吻合，表明该模型可以准确识别研究区岩石抗压强度。结果还表明，围压对地层岩石的力学性质影响很大，因此在分析岩石力学性质时，必须考虑围压。此外，该方法仅用常规测井资料即可计算出一些老井的岩石抗压强度。

"点击查看英文标题和摘要"

Rock compressive strength was a basic lithomechanics parameter. And rock compressive strength affected the drillingability and stability of rock in drilling engineering. So a calculating method of stratum rock compressive strength was needed to raise the reliability of stratum information acquired. Then the bit selection, well design and reservoir stimulation design could be more accurate. By analyzing the experiment data of rock 3-axis compressive strength, a logging interpretation method of confining pressure has been established, and by considering the influence of confining pressure, a quantitative calculating method of rock compressive strength based on the logging data has been given. This model was used to analyz an exploration well. The results showed that the rock compressive strength was fit to the drilling time, which indicates that this model may accurately recognize the rock compressive strength in the researched area. The result also showed that confining pressure can strongly influence mechanical properties of formation rocks, so if we analyzed the rock mechanical properties, the confining pressure must be taken into account. Besides the method can calculate rock compressive strength in some old well with regular logging data only.