Pvt Analysis For Oil

‫ ﻋﺒﺎس راﺿﻲ ﻋﺒﺎس‬/‫اﻟﻤﮭﻨﺪس‬ CHAPTER 2 PVT ANALYSIS FOR OIL 2.1 INTRODUCTION In Chapter 1, the importance of PVT analysis was stressed for relating observed volumes of gas production at the surface to the corresponding underground withdrawal. For gas this... More

‫ ﻋﺒﺎس راﺿﻲ ﻋﺒﺎس‬/‫اﻟﻤﮭﻨﺪس‬ CHAPTER 2 PVT ANALYSIS FOR OIL 2.1 INTRODUCTION In Chapter 1, the importance of PVT analysis was stressed for relating observed volumes of gas production at the surface to the corresponding underground withdrawal. For gas this relationship could be obtained merely by determining the single or two phase Z−factor, and using it in the equation of state. The basic PVT analysis required to relate surface production to underground withdrawal for an oil reservoir is necessarily more complex due to the presence, below the bubble point pressure, of both a liquid oil and free gas phase in the reservoir. This chapter concentrates on defining the three main parameters required to relate surface to reservoir volumes, for an oil reservoir, and then proceeds to describe how these parameters can be determined in the laboratory by controlled experiments performed on samples of the crude oil. The subject is approached from a mechanistic point of view in merely recognising tha Less