Methodology for combining heavy hydrocarbons into a pseudo-component based on the estimation of the distribution coefficient error
UDC: 622.279.031:53
DOI: -
Authors:
GUSAKOV GLEB K.
1,
GIL'MANOV ALEXANDER YA.1,
SHEVELEV ALEXANDER P.1
1 University of Tyumen, Tumen, Russia
Keywords: PVT-model, phase equilibrium, reservoir hydrocarbon systems, mathematical modeling, gas condensate fields
Annotation:
Regulation of the process of gas condensate field development is impossible without predicting the phase behavior of hydrocarbons. In the engineering practice the main direction to solving this problem is the use of hydrodynamic simulators, but a large number of hydrocarbon components unreasonably increases the calculation time. In the course of the work, an algorithm for calculating the vapor-liquid equilibrium of a complex hydrocarbon system with the unification of a group of heavy hydrocarbons into one pseudo-component was implemented. The validation of the developed methodology was carried out by comparing the calculated data with laboratory experiments results as well as its verification by comparing the results of calculation of the dynamics of the hydrocarbon system phase behavior based on the proposed methodology with already known methods of combining heavy fractions into a pseudo-component. It resulted in revealing the fact that the algorithm based on the assessment of the distribution coefficient error has an optimal balance between the number of components and the reproducibility of laboratory research results. Within the framework of the developed method, a physically justified algorithm for determining the hydrocarbon number, starting from which it is possible to carry out unification into a pseudo-component, is proposed. The application of the proposed method allowed revealing that the number of the initial unified component is affected not only by the composition, but also by the thermobaric conditions.
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