Qualitative and Quantitative Study of Asphaltenes Precipitation During a Gas Injection Project

D02 QUALITATIVE AND QUANTITATIVE STUDY OF ASPHALTENES PRECIPITATION DURING A GAS INJECTION PROJECT Abstract 1 Laboratory and field data from the Snorre reservoir oil in the North Sea confirm that asphaltenes due to the fact that they precipitate when the oil in which they are contained is subjected to considerable compositional changes can be used as a natural tracer for monitoring the success of a gas miscible flooding during IOR projects. The field data reveal that the change of GOR in producing wells affects the asphaltenes content of the producing oil only in the cases where injection gas has gone