Measurement of Soret coefficients of crude oil in microgravity

Statistics – Applications

Scientific paper

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Diffusion And Thermal Diffusion

Scientific paper

Optimum technical and economic development of an oil field requires accurate knowledge of the behavior of the fluids that impregnate petroleum reservoirs and of their evolution during production. Many reservoirs being explored today are at sufficient depth to be close to critical pressure and temperature conditions. Therefore, they are very sensitive to applied forces of gravity plus temperature and pressure gradients. Compositional differences induced by such forces can be very significant. The thermodiffusion (Soret) process exists in the presence of a temperature gradient in fluid mixtures, inducing a mass flux. Very few numerical models of oil reservoirs take into account the thermodiffusion process mainly due to a severe lack of Soret coefficients measured in crude oil. Soret coefficients of crude oil must be measured to provide for accurate numerical models. The Microgravity Research Center is collaborating with C-CORE to develop a microgravity experiment to fly on NASA's Space Shuttle. This paper describes the development and potential benefits of the Soret coefficient project.

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