cased borehole

The interpretation of falling-head tests in cased boreholes is discussed.

This method was successfully used to a depth of 50 m in a cased borehole and these results are presented.

Also shown is the EM39 probe about to be lowered down a cased borehole.

Field permeability tests in cased boreholes have been modelled in a sand tank with controlled and measured hydraulic conditions.

An advantage of the gamma log over some other types of well logs is that it works through the steel and cement walls of cased boreholes.

It provides a unified interpretation of transmissivity T and storativity S based on the velocity graph for variable-head tests in monitoring wells or cased boreholes.

For example, take the case of borehole drilled from surface: A 12" steel cased borehole was drilled from the surface to a depth of about 1000m.