Effect of Compositional Grading on Reservoir Fluid Characterization in a Giant Iranian Oil Reservoir
Publish place: 12th National Iranian Chemical Engineering Congress
Publish Year: 1387
نوع سند: مقاله کنفرانسی
زبان: English
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شناسه ملی سند علمی:
NICEC12_537
تاریخ نمایه سازی: 30 شهریور 1387
Abstract:
The variation of fluid composition with depth in a reservoir is called compositional grading. As depth increases, the mole fraction of light components, saturation pressure and GOR decreases but density increases. Prediction of compositional grading make it possible to check the reliability of new fluid samples, estimation of fluid in place, initialization of reservoir simulators and consideration of production
alternatives[2].In this study one of the giant oil reservoirs with an initial gas cap that is located in southwest of Iran was studied. 11 complete PVT reports were selected to perform fluid characterization. All experiments were modeled by commercial PVT software. Simulation results indicate a little compositional grading in Asmari reservoir. This is expected due to the fractured network of this reservoir. The most accurate reservoir fluid composition for one of the valid samples was used to predict the reservoir fluid composition and its corresponding PVT properties at different bottom hole locations. To describe the compositional grading, several isothermal and non-isothermal models were tested where nonisothermal models showed the best match with experimental data. In addition to the fluid properties such as saturation pressure, these models have predicted the GOC, reasonably well.
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Authors
Saadat Mohammad Hossein Zadeh
National Iranian South Oil Company (NISOC) - Ahwaz Iran
Shahin Kord
National Iranian South Oil Company (NISOC) - Ahwaz Iran
Mohammad Reza Abdali
National Iranian South Oil Company (NISOC) - Ahwaz Iran
Abbas Helali Zadeh
Petroleum University of Technology Ahwaz - Iran