Introduction of a very high pressure MicroDSC Applications to the gas hydrates formation

摘要

Differential Scanning Calorimeter, operating under high pressure, is a very usefulrntechnique for the determination of the thermodynamic properties and the kinetics of gasrnhydrate formation. Specific gas tight controlled pressure vessels are used to obtain thernhydrate formation in complex fluids.rnBased on the MicroDSC technology, Setaram is introducing a new High PressurernMicroDSC with a vessel (0,7 cm~3) operating up to 400 bars (5800 psi) between –45℃ andrn120℃. A dedicated high pressure panel is attached to the HP MicroDSC to cover the rangernfrom normal to 400 bars pressure.rnAn example of the use of the HP MicroDSC is given with the formation of hydrates inrndrilling muds. With the increasing number of deep offshore drilling operations, operatorsrnand service companies have to solve more and more complex technical challenges. Extremernconditions encountered at these depths require an adaptation of the drilling muds. The rangernof temperature (down to –1℃) and pressure (up to 400 bars) are favorable conditions to thernformation of hydrates. HP MicroDSC is used to determine the thermodynamic propertiesrnand kinetics of hydrate formation in mud formulations, particularly in the presence of largernamounts of minerals.rnThe technique allows the detection of phase transitions versus time, temperature andrnpressure. Using such a technique, dangerous areas of hydrate formation in drilling mudsrnformulations (water-base and oil-base) can be predicted.