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Optimization of fluid sample heavy component division

ZHAO Chao-bin,XIA Chao-hui,GUO Chun-qiu(International Overseas Research Center,PetroChina,Beijing 100083,China)  
Since phase matching provides state parameters of each composition for compositional model,the quality of matching would influence the characterization precision of fluid properties by state parameters.Condensate gas sample from condensate gas pool of the Indonesia project is taken as the studying target,of which the heavy component division has been conducted,analyzing the matching situations of dew point pressure,separator GOR and maximum retrograde condensed liquid,as well as optimizing heavy components dividing points.Based on division optimization of multiple samples,an optimization rule has been found for a series of heavy components(C7+)with mols amount between 0.96%~29%,which helps to promote the matching precision and shortening the matching time.
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