Compositional Grading and Reservoir Oil Composition Variation with Depth Experiment by PVTi Software with Lab Data
Mehrdad Alemi1, Hossein Jalalifar2
1Dr. Mehrdad Alemi, Department of Petroleum & Mining Engineering, Shahid Bahonar University of Kerman-Iran.
2Hossein Jalalifar, Department of Petroleum & Mining Engineering, Shahid Bahonar University of Kerman-Iran.
Manuscript received on 25 November 2023 | Revised Manuscript received on 26 October 2023 | Manuscript Accepted on 15 November 2023 | Manuscript published on 30 November 2023 | PP: 6-11 | Volume-3 Issue-2 November 2023 | Retrieval Number: 100.1/ijpe.B1916113223 | DOI: 10.54105/ijpe.B1916.113223
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Abstract: AHeavier molecules tend to migrate towards the bottom of column. Gross assumptions in PVT experiment are that the system is in gravitational and diffusive equilibrium. Starting from an oil and moving up a column, the fluid will become lighter and tend towards a gas (condensate). Two types of grading are possible. The first one is of the fluid going from an oil to a gas with a distinct gas-oil contact at some unique depth. If this situation occurs, it will be predicted. The second one is the Fluid grading from an oil to a gas without a contact. This case corresponds to the critical temperature of a composition within the reservoir equalling the reservoir temperature. In compliance with compositional grading study, the API and some properties of the reservoir oil composition such as sulphur and CO2 contents vary with the reservoir depth. Most of the time the gas-oil contact (GOC) is named as the reservoir datum depth. In this paper, the study of compositional grading and reservoir oil composition variation with depth experiment by PVTi software with lab data has been achieved and some good conclusions have been gained.
Keywords: Compositional Grading, PVTi Software and Lab Data, Gas-Oil Contact (GOC), Datum Depth.
Scope of the Article: Oil Refining