The Research on Asphaltene Deposition Mechanism and Its Influence on Development During CO2 Injection

摘要

Based on high pressure physical property experiments, such asrnswelling experiment, multi-contact experiment and asphaltenernprecipitation experiment et al, thermodynamic characteristicsrnof asphaltene precipitation during CO2 injection have beenrnanalyzed comprehensively with numerical simulation, whichrnmake up the deficiency of analyzing physical and chemicalrnparameters with experiments; adsorption and plugging ofrnasphaltene on rocks and rheology characteristic of oilrncontaining precipitated asphaltene have been studied; therninfluence of asphaltene deposition on reservoir have beenrnresearched; Found on above-mentioned study, the mathematicrnflow model considering asphaltene deposition has beenrnestablished. Take one oil field in our country as example, therninfluence of asphaltene deposition on production dynamicsrnduring CO2 injection has been researched. The results were inrnagreement with field observation and history data, which canrnbe efficient for the further production prediction.