An accurate method to generate composite PVT data for black oil simulation

摘要

Lookup Black Oil Tables (BOT) are widely utilized by professional software packages for providing fluid properties during reservoir, wellbore and pipeline flow simulation instead of having to solve repeatedly the highly non-linear phase behavior problem at a very high CPU cost. These Tables, are either generated using an Equation of State (EoS) model already tuned to the available lab data or from the data itself or by applying available correlations of general use. Given the considerable effort and expertise required for achieving a comprehensive EoS tuning, the methods for generating the BOT utilizing the PVT lab data are still very popular. Such methods currently available are based on simplifying assumptions and often fail to match accurately the required composite vaporization B-o and R-s curves along the entire operating pressure range. In addition, these methods do not allow the recalculation of the BOTs when the selected separation train conditions are altered unless such a PVT lab separation test data is already available.