A MONTE CARLO MODEL FOR THE DETERMINATION OF THE VOLUME FRACTIONS OF CRUDE OIL, WATER AND NATURAL GAS USING THE DUAL ENERGY γ-RAY TRANSMISSION

The extraction of petroleum from its geological reservoirs involves the piping of crude oil, water and natural gas from the wells as a multiphase mixture. Knowledge of the mass flow rate of each component is required to control production.In this work, this multiphase flow has been pictured as a coarse-grained component system, water as drops and natural gas as bubbles, both are carried out through the crude oil along the pipeline. According to this picture, a Monte Carlomodel for grain size dependent gamma-ray attenuation has been constructed and applied to determine the volume fractions of oil, water and natural gas in pipelines by using gamma-ray transmission technique.