Modeling wellbore fluids

A computer storage medium encoded with a computer program, the program comprising instructions that when executed by one or more computers cause the one or more computers to perform operations comprising:

• identifying a target viscosity profile of the wellbore fluid;
• determining an initial set of values of the fluid additives that are based at least in part on the target viscosity profile;
• determining, with one or more non-linear predictive models, a computed viscosity profile of the wellbore fluid and a computed set of values of the fluid additives based, at least in part, on the initial set of values of the fluid additives;
• comparing at least one of the computed viscosity profile or the computed set of values with a specified criteria of the wellbore fluid;
• and
• preparing, based on the comparison, an output comprising at least one of the computed viscosity profile or the computed set of values of a resultant wellbore fluid.

A system of one or more computers configured to perform operations comprising:

• identifying a target viscosity profile of the wellbore fluid;
• determining an initial set of values of the fluid additives that are based at least in part on the target viscosity profile;
• determining, with one or more non-linear predictive models, a computed viscosity profile of the wellbore fluid and a computed set of values of the fluid additives based, at least in part, on the initial set of values of the fluid additives;
• comparing the computed viscosity profile and at least one of the computed set of values with a specified criteria of the wellbore fluid;
• and
• preparing, based on the comparison, an output comprising the computed viscosity profile and at least one of the computed set of values of a resultant wellbore fluid.