1. A computer-implemented method of modeling a wellbore fluid that comprises a base fluid and one or more fluid additives, the method comprising: identifying, with a hardware computer processor, a target viscosity profile of the wellbore fluid; determining, with the hardware computer processor, an initial set of values of the fluid additives that are based at least in part on the target viscosity profile; determining, with the hardware computer processor, 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; determining, with the hardware computer processor, with one or more non-linear predictive models, an inverse computed set of values of the fluid additives based, at least in part, the computed set of values of the fluid additives and the computed viscosity profile; comparing, with the hardware computer processor, the computed viscosity profile with the target viscosity profile and at least one of the inverse computed set of values of the fluid additives with at least one of the initial set of values of the fluid additives; preparing, with the hardware computer processor, based on the comparison, an output comprising at least one of the computed viscosity profile or the computed set of values; and controlling, with the hardware computer processor, one or more properties of the wellbore fluid based on the comparison.