«Equipment and technologies for oil and gas complex»

Analysis of the influence of combining components methods on the phase composition of a natural hydrocarbon system

UDC: 544.015.4
DOI: -

Authors:

¹ University of Tyumen, Tyumen, Russian Federation

Keywords: gas condensate fields, phase state, hydrocarbon system, validation, pseudo-component, combination of components, volumetric fraction of liquid phase, error

Annotation:

Involvement of gas condensate fields in the development requires modeling of the reservoir hydrocarbon system phase state to predict production modes for minimizing retrograde processes. The algorithm of such calculation developed by the authors of the article earlier considers the mineralization of reservoir water and the search for all the roots of the material balance equation, but it has not been verified for correctness using real data. In addition, the effect of pseudo-component determination methods on the molar lobes was not analyzed. The aim of the work is to analyze the influence of various methods of components combination on the results obtained in the course of calculation of a hydrocarbon system phase state. It has been shown for the first time that the determination of pseudo-components with the predominant presence of hydrocarbon components in one aggregate state makes it possible to increase the accuracy of forecasting the components molar fractions. The object of the study is the composition of a reservoir hydrocarbon system. The dependence of the liquid phase volumetric fraction on reservoir pressure is calculated. The model validation was carried out with an error of 3 %. It was determined that the separation of pseudo-components should be done in such a way, that, under reservoir conditions, hydrocarbons of similar molar mass in the same aggregate state fall into one fraction.

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