Modeling of 3D Compositional Grading and Plus Fraction Molecular Weight Change in Non-isothermal Petroleum Reservoirs

Mohammad Hossain Nikpoor, Riyaz Kharrat, and Zhangxing Chen


Composition and physical properties vary within hydrocarbon reservoirs, even in well connected ones; it is of crucial interest to model this change in order to initialize the reservoir simulator. In this work we use a non-isothermal model to depict changes in plus fraction molecular weight and will integrate it into another non-isothermal model describing fluid compositional changes within a 3D reservoir. Previously, the model has been validated versus 1D real reservoir data. It will be used to model compositional change of real hydrocarbon in a synthetic 3D reservoir subjected to temperature gradient in x, y and z directions.