Analyzing mixability of well cement slurries

A system for analyzing well cement slurry mixing, the system comprising:

• a mixer for mixing a dry cement blend with mix water to form a well cement slurry under a plurality of conditions, the plurality of conditions corresponding to a plurality of distinct Reynolds number values for the well cement slurry in the mixer;
• a measurement device to measure an amount of energy used to mix the well cement slurry in the mixer;
• and
• a data analysis system comprising:
• a data-processing apparatus;
• and
• memory storing computer-readable instructions that, when executed by the data-processing apparatus, cause the data-processing apparatus to perform operations comprising:
• identifying power number values associated with the mixing of the well cement slurry under the plurality of conditions, each power number value based on the amount of energy used to mix the well cement slurry under a respective one of the plurality of conditions;
• and
• identifying values for parameters of a functional relationship between power number and Reynolds number based on the power number values and the Reynolds number values for the plurality of conditions, wherein:
• the power number is dependent upon a time-varying fluid density measured from when the dry cement blend is mixed with the mix water until the well cement slurry is homogenous as confirmed by static or dynamic light scattering,
• the Reynolds number is dependent upon a time-varying apparent fluid viscosity measured from when the dry cement blend is mixed with the mix water until the well cement slurry is homogenous as confirmed by static or dynamic light scattering, and
• the functional relationship with the identified values for the parameters is used to determine a mixability index associated with the mixing to form another well cement slurry.