METHOD AND SYSTEM TO OBTAIN A COMPOSITIONAL MODEL OF PRODUCED FLUIDS USING SEPARATOR DISCHARGE DATA ANALYSIS

摘要

The invention relates to a method of performing production operations of an oilfield having at least one process facility and at least one wellsite operatively connected thereto, each at least one wellsite having a wellbore penetrating a subterranean formation for extracting fluid from an underground reservoir therein. The method steps include obtaining a sample of separator discharge fluid from a separator, wherein the separator receives fluid extracted from the underground reservoir, performing gas chromatography on the separator discharge fluid to obtain gas molar composition, performing oil characterization on the separator discharge fluid to obtain oil density and oil molecular weight, performing a first simulation using the gas molar composition, the oil density, the oil molecular weight, and a gas oil ratio (GOR) of the separator discharge fluid to obtain a simulated composition of separator inlet fluid, wherein the first simulation is performed using a simulator, performing a second simulation using the simulated composition of separator inlet fluid to obtain a simulated composition of separator outlet fluid, wherein the second simulation is performed using the simulator, comparing the simulated composition of separator outlet fluid to an actual composition of separator outlet fluid, wherein the actual composition of the separator outlet fluid is obtained from the sample, and presenting the simulated composition of separator inlet fluid, when the difference between the actual composition of separator outlet fluid and the simulated composition of separator outlet fluid is less than a threshold value.