The Scientific World Journal / 2013 / Article / Tab 6

Research Article

Chemical Effect on Wellbore Instability of Nahr Umr Shale

Table 6

Experimental results of shale UCS after immersing in drilling fluid.

Drilling fluid typeOrganic saltKCL-polymerGel-polymer

UCS without immersing (MPa)48.6251.0947.22
UCS with immersing of 24 h (MPa)40.1644.844.8
UCS with immersing of 48 h (MPa)37.8141.4143.02
UCS with immersing of 72 h (MPa)35.6439.8241.69
UCS with immersing of 96 h (MPa)34.963940.33

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