ABSTRACT
Timely assessment of hydrocarbon reservoir fluid is very important for upstream oil/gas companies to assess their reservoirs and make optimum plans for development and production of their underground resources. The majority of molecules constituting fluid in oil/gas reservoir are various types of hydrocarbons and water. The only way to handle extreme high pressure is to seal the sensitive spectrometer from high pressure. Only optical windows should be facing high pressure fluid extracted from the formation. Any mechanically moving or movable components are most likely to fail or misalign when subject to severe shock and vibration. A spectrometer using a dispersing element, such as a grating or prism requires a longer optical path or smaller element detector array to achieve greater wavelength resolution. As the measured fluid is at such high pressure and temperature, its spectrum is substantially different from those at a standard laboratory condition often found in spectrum database library.
