Dual-sensor tool optical data processing through master sensor standardization

A system, comprising:

• a downhole tool comprising a first operational sensor and a second operational sensor;
• a processor;
• and
• a computer-readable medium having instructions stored thereon that are executable by the processor to cause the system to,
• transform optical responses for a fluid sample, obtained using the first operational sensor and the second operational sensor, to a parameter space of the downhole tool,
• apply fluid models in the parameter space of the downhole tool to the transformed optical responses to obtain density predictions of a fluid sample,
• match the density predictions of the first operational sensor to the density predictions of the second operational sensor based on optical parameters of the fluid models to obtain matched density predictions,
• calculate a difference between the matched density predictions and measurements obtained from a densitometer, and
• estimate a contamination index based on the difference.

A non-transitory, computer-readable medium having instructions stored thereon that are executable by a computing device to perform operations comprising:

• transforming optical responses for a fluid sample, obtained using a first operational sensor and a second operational sensor of a downhole tool, to a parameter space of the downhole tool;
• applying fluid models in the parameter space of the downhole tool to the transformed optical responses to obtain density predictions of the fluid sample;
• matching the density predictions of the first operational sensor to the density predictions of the second operational sensor based on optical parameters of the fluid models to obtain matched density predictions;
• calculating a difference between the matched density predictions and measurements obtained from a densitometer;
• and
• estimating a contamination index based on the difference.