It is very important for drilling engineering and geological staff to assess formationlithology and the working condition of bit.
地层岩性与钻头工况的评估对钻井工程技术人员和地质人员十分重要。
2
This well is characterized by deep drilling horizon and varied formationlithology, so its predrilling prediction of abnormal pressure is the most significant.
该井钻探层位深、地层变化大，钻前异常地层压力预测尤为重要。
3
This article started from the geological feature and the characteristics of formationlithology mechanics of the Jiulongshan and optimized the deep well casing programs.