High temperature high pressure (HTHP) cell in sum frequency generation (SFG) spectroscopy for oil/brine interface analysis with reservoir conditions and dynamic compositions

A system for sum frequency generation spectroscopy, the system comprising:

• a pressure cell comprising:
• a metal pressure chamber including:
• a liquid sample holder that retains a liquid sample;
• a removable lid that seals against a base to enclose the liquid sample holder in an interior of the metal pressure chamber;
• a window in the removable lid that allows the liquid sample to be optically accessed from an exterior of the metal pressure chamber;
• a sample inlet that flows the liquid sample from the exterior of the metal pressure chamber to the liquid sample holder in the interior of the metal pressure chamber at a predetermined flow rate;
• and
• a sample outlet that flows the liquid sample from the liquid sample holder to the exterior of the metal pressure chamber;
• a heating stage, disposed in the interior of the metal pressure chamber, that heats the liquid sample;
• an ultrasonic stage, disposed in the interior of the metal pressure chamber, that emulsifies the liquid sample;
• a chamber pump, connected to the interior of the metal pressure chamber, that pressurizes the interior of the metal pressure chamber;
• and
• a controller that controls the chamber pump, the ultrasonic stage, and the heating stage to control a pressure of the interior of the metal pressure chamber, an emulsification of the liquid sample, and a temperature of the liquid sample, respectively;
• and
• a sum frequency generation microscope comprising:
• a first light source that generates light of a first variable frequency;
• a second light source that generates light of a second frequency;
• and
• a detector that detects light.