New correlations calculate volatile oil, gas condensate PVT properties

摘要

New correlations provide modified black-oil (MBO) pressure-volume-temperature (PVT) properties when fluid samples are unavailable. One can use the correlations in generalized material balance calculations and MBO simulations. The new correlations match the fluid properties of a selected database and the authors also validated them with generalized material balance calculations. To develop the new corrections, the authors modified existing solution gas-oil ratio, oil formation volume factor, and gas formation-volume factor correlations to increase their accuracy when used with gas condensates and volatile oils. This study used 13 reservoir fluid samples (8 gas condensates and 5 volatile oils). For every sample, the authors constructed an EOS model that matched as best as possible the experimental results of all available PVT laboratory experiments that included constant composition expansion (CCE), constant volume depletion (CVD), differential liberation (DL), and separator tests. The error values show high accuracy and prove the validity of the new correlations.