Calculation method of component and phase composition of gas condensate mixture in near-wellbore reservoir

About the authors:

Aleksandr B. Shabarov, Dr. Sci. (Tech.), Professor, Honored Scientist of the Russian Federation, Professor of the Department of Applied and Technical Physics, Institute of Physics and Technology, University of Tyumen; a.b.shabarov@utmn.ru; eLibrary AuthorID, ORCID, ResearcherID, ScopusID

Sergey A. Zanochuev, Cand. Sci. (Tech.), Head of the Department of Research of Properties of Formation Fluids, Tyumen Oil Research Center; ORCID, szanochuev@mail.ru

Abstract:

The physic-mathematical model of quasi-one-dimensional time dependent flow and corresponding calculation method propose and establish a dependency of phase changes intensity on fluid parameters and filtration characteristics of the reservoir during the filtration of gas condensate mixture. In accordance with the proposed method there were found patterns of “condensate banking” formation—a condensate accumulation in near-wellbore reservoir. There were established a dependency of the density changes, single phase flows (gas, condensate) and components on the radius between the well and external boundary and on the time of exploitation. A calculated-parametric study of change of both component and phase composition of gas condensate mixture in near-wellbore reservoir was made. The results of a typical example calculation based on the real gas condensate mixture showed that condensate accumulation in near-wellbore reservoir during well exploitations with a lower bottom hole pressure hugely affects both liquid and gas phases reallocation as well as mass flow rate of the recovered product.

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