Affiliation:
1. University of Alberta (Now with Université de Pau et des Pays de l'Adour (UPPA) and TotalEnergies)
2. University of Alberta
3. University of Alberta (Corresponding author)
Abstract
Summary
We develop a new trust-region (TR)-based algorithm to construct complete three-phase envelopes for reservoir fluid mixtures. The new algorithm is developed based on a basic algorithm for two-phase envelope constructions (Xu and Li 2023). A state-of-the-art TR method with a realistic exact subproblem solver is implemented in the algorithm, and an integrated strategy is adopted to construct complete phase envelopes with two-phase and three-phase branches. We test the performance of the TR-based algorithm by constructing multiphase envelopes for a total of 15 fluid mixtures that include hydrocarbons-CO2, hydrocarbons-asphaltene, and hydrocarbons-water mixtures. Comparison against the conventional Newton-based algorithm indicates that the TR-based algorithm leads to a much higher computational efficiency and an enhanced robustness.
Publisher
Society of Petroleum Engineers (SPE)
Subject
Geotechnical Engineering and Engineering Geology,Energy Engineering and Power Technology