Creating pVT properties correlations for oil samples from the Sava and Drava depressions : master's thesis

Korištenjem pVT simulatora Schlumberger Eclipse napravljena je simulacija pVT analize prema podacima prikupljenim s naftnog polja Žutica. U sklopu simulacije izvršeni su testovi diferencijalnog otparavanja (DL), ekspanzije fluida uz konstantni sastav (CCE) te test tlaka zasićenja s ciljem dobivanja vrijednosti volumnog faktora nafte Bo, faktora otopljenog plina Rs i relativnih gustoća nafte i plina, kao funkcije tlaka pri konstantnoj temperaturi. Korelacije koje su pokazale najmanju relativnu pogrešku u odnosu na rezultate dobivene simulacijom su podvrgnute korekciji korelacijskih konstanti numeričkim modeliranjem. Time se maksimalno približilo vrijednostima pVT simulacije te je relativna pogreška tako dobivene korelacije bila najmanja.Abstract Using the Schlumberger Eclipse pVT simulation software, a pVT analysis was made on data series from Žutica oilfield. In terms of pVT simulation, Differential Liberation, Constant Composition Expansion and Saturation Pressure tests are performed in order to develop the Formation Volume Factor, the Solution Gas Factor, and oil and gas gravity values, all as functions of pressure within constant temperature. Correlations with minimal relative error values are chosen for further development. Their correlation constants were altered to match pVT simulation values by numerical modeling. That way, correlations with new correlation constants had the lowest relative error values compared to pVT analysis data