Wellbore Fluids Comprising Mineral Particles and Methods Relating Thereto

A method comprising:

• circulating a wellbore fluid with a density of about 7 ppg to about 50 ppg in a wellbore penetrating a subterranean formation, the wellbore fluid comprising a base fluid and a plurality of linkable mineral particles, and the wellbore fluid having first viscosity;
• and
• introducing a linking agent into the wellbore fluid on-the-fly in response to a condition encountered in the wellbore during circulating so as to yield a second viscosity that is greater than the first viscosity of the wellbore fluid.

A method comprising:

• circulating a wellbore fluid with a density of about 7 ppg to about 50 ppg in a wellbore penetrating a subterranean formation, the wellbore fluid comprising a base fluid and a plurality of mineral particles, and the wellbore fluid having first viscosity;
• and
• introducing a degradation agent into the wellbore fluid on-the-fly in response to a condition encountered in the wellbore during circulating so as to yield a second viscosity that is less than the first viscosity of the wellbore fluid.