Determination of downhole formation fluid contamination and certain component concentrations

A system comprising:

• one or more tools which comprise one or more optical computing devices, wherein the one or more tools are configured to obtain real time property measurements of a property of a first fluid downhole, real time measurements of an amount of an interactive component of the first fluid downhole, and real time measurements of an amount of a non- interactive component of the first fluid downhole, wherein the first fluid downhole comprises a formation fluid;
• memory storing instructions;
• and
• at least one processor that executes the instructions to:
• determine a total amount of the interactive component in the first fluid at a time of interest based on the real time property measurements of the first fluid downhole and the real time measurements of the amounts of the interactive component and non-interactive component downhole, wherein the total amount of the interactive component comprises the interactive component in a free form and the interactive component in a bound form, and
• wherein the real time measurements of the amount of the interactive component downhole are real time measurements of the amount of the interactive component in its free form downhole.

A system, comprising:

• an integrated computational element, comprising alternating layers of a first and a second dielectric material, each of the alternating layers of the first and the second dielectric materials having a thickness and a refractive index selected according to a regression vector associated with a characteristic of a sample, the sample located downhole in a borehole;
• a detector configured to measure an intensity of a sample light interacted with the integrated computational element and to generate a detector signal based on the intensity of the sample light interacted with the integrated computational element;
• and
• a signal processor configured to obtain the characteristic of the sample from the detector signal, and to determine a total amount of an interactive component in the sample or a at a time of interest based on real time property measurements of the sample and real time measurements of amounts of the interactive component and non- interactive component of the sample, wherein the total amount of the interactive component comprises the interactive component in a free form and the interactive component in a bound form.