论文部分内容阅读
在水文地质钻探过程中,对孔内水位变化与冲洗液漏失量进行观测与分析,是评价水文地质条件的基础资料。一、水位动态的观测在钻探过程中,孔内水位动态的观测应与钻探的作业程序、地层变换和岩心采取情况等密切配合起来。当水位动态变化频繁时,观测次数多;反之观测的间隔时间可以适当延长。在提升钻具后和下降钻具前各观测水位一次,其间隔时间仍应不少于10分钟。虽然下降钻具前所观测的水位还没有达
In the process of hydrogeological drilling, observing and analyzing the change of water level in the hole and the loss of flushing fluid is the basic data for evaluating the hydrogeological conditions. 1. Dynamic observation of water level During drilling, the dynamic observation of the water level in the hole should be closely linked with drilling procedures, formation changes and core taking. When the water level changes frequently, the number of observations more; the other hand, the observation interval can be extended. After lifting the drill and lowering the water level at each observation once, the interval should still be no less than 10 minutes. Although the water level observed before lowering the drill has not yet reached