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钻时录井即记录钻探每米进尺所用的时间。钻时能表明钻头破碎岩石的快慢。地下岩石是各种各样的,有砂岩、砾岩、泥岩、页岩以及石灰岩、火山岩、变质岩等不同的岩石,它们本身的坚硬程度不同,钻穿它们所耗时间也就不一样。这样,就可根据钻头破碎不同类型岩石的时间来推断可能的
Drilling time log records the time taken to drill each meter footage. Drilling can indicate when the drill bit breaks the rock. Underground rock is a variety of different rocks, sandstone, conglomerate, mudstone, shale and limestone, volcanic rocks, metamorphic rocks and other rocks, their own different degree of hardness, drilling time to wear them is not the same. In this way, it is possible to infer from the time it takes for the bit to break up different types of rocks