Abstract:

With the decline of the pressure, the retrograde gas condensate in gas condensate reservoir will be accumulated near the wellbore, which would cause the formation permeability damage. Even more which will influence the normal production of gas-condensate well. Based on the transfusion theory for a gascondensate system at a constant temperature, the saturation distribution characteristic of gas condensate and multinomial infiltration flow characteristic were studied in the paper. At the same time, after analyzing different kinds of constraint condition of gas-condensate well, the production performance theory and means of gas-condensate well at considering condensate pollution condition were also discussed, and a sort of new method which can forecast gas-condensate well Horner time was derived. The application results showed that the result of Horner time of gas-condensate well got from this paper was accordant with the practical Horner time, it indicated that the approaches in this paper are reliable and practicable.

Key words: gas-condensate well, retrograde condensate oil damage, characteristic of production dynamic, effective production timet