Application Of Electrochemical Impedance Spectroscopy For Analyzing Sag Of Drilling Fluids

A drilling system comprising:

• a drill string;
• a drill bit attached to a distal end of the drill string;
• a fluid monitoring and handling system comprising
• a mud pit operable to receive a drilling fluid from a wellbore;
• a mud pump operable to circulate the drilling fluid;
• and
• an electrochemical impedance spectroscopy system comprising a container holding a sample of drilling fluid and an electrochemical impedance spectroscopy analyzer for measuring impedance of the sample;
• and
• a computer system in signal communication with the electrochemical impedance spectroscopy system, wherein the computer system comprises a processor and a non-transitory computer readable storage medium that when executed by the processor causes the computer system to determine sag behavior of the sample based, at least partially, on the impedance.

An electrochemical impedance spectroscopy system comprising:

• a concentric sample probe comprising an outer container and an inner portion, wherein a gap is disposed between the outer container and the inner portion, and wherein the outer container comprises sections that are longitudinally spaced and insulated spacers disposed between the sections;
• an electrochemical impedance spectroscopy analyzer in signal communication with the concentric sample probe, the electrochemical impedance spectroscopy analyzer comprising a signal generator;
• and
• a switching device operable to selectively send an excitation signal from the electrochemical impedance spectroscopy analyzer to one or more of the sections of the outer container.