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本文从火成岩分布区的地质构造运动和成岩条件,钻进作业时钻孔—地层体系的压力差及岩石的弹性形变和水力破裂等方面,分析了火成岩地层冲洗液漏失的原因。介绍了减少截面或完全隔离流失通道,减少钻孔—地层体系压力差,以及调节冲洗液流变性和消除冲洗液漏失的具体方法与经验。提出了火成岩地层钻孔漏失的分类及相应的治理方法。
In this paper, the causes of leakage of icing fluid in igneous rocks are analyzed from the tectonic movement and diagenesis of igneous rock distribution, the pressure difference of boreholestrain system during drilling, the elastic deformation and hydraulic rupture of rock. Describes specific methods and experiences to reduce the cross section or completely isolate the lost passage, reduce the pressure difference between the borehole and the formation system, and adjust the rheology of the flushing fluid and eliminate the leakage of the flushing fluid. The classification of borehole leakage in igneous rock strata and the corresponding treatment methods are put forward.