IMPEDANCE SPECTROSCOPY MEASUREMENT DEVICE AND METHODS FOR ANALYSIS OF LIVE RESERVOIR FLUIDS AND ASSESSMENT OF IN-SITU CORROSION OF MULTIPLE ALLOYS

摘要

A method for analyzing fluid withdrawn from a subsurface formation includes disposing the withdrawn fluid in a chamber and maintaining the fluid in the chamber substantially at a same temperature and pressure as exists in the subsurface formation. Electric current is passed through the fluid in the chamber using at least one electrode made from a selected metal, the electric current comprising direct current and alternating current of frequency sufficient to determine at least one of (i) resistance of the fluid sample in the chamber directly and (ii) from the direct current determine a polarization resistance of the at least one electrode.