Nafta, Vol. 63 No. 3-4, 2012.
Izvorni znanstveni članak
Theoretical and experimental analysis of constant volume depletion test and flash calculation by using a modified algorithm
Hamed Arabi
; Institute of petroleum engineering, Faculty of Engineering, University of Tehran, Tehran, Iran
Soheyla Farahani
; Chemical Engineering Department, Arak University, Arak, Iran
Aliakbar Javadifar
; Chemical & Petroleum Engineering Department, Sharif University of Technology, Tehran, Iran
Sažetak
Constant volume depletion (CVD) which simulates closely the actual behavior of a gas condensate reservoir is a very important laboratory test. The results obtained from the laboratory measurements can be directly used to quantify recoveries of condensate and surface gas as a function of pressure below the dew point. The most time consuming section in simulating the compositional reservoir is flash calculation and several approaches have been suggested to speed it up. The physical properties of a fluid depend on whether the fluid is present as a single phase or splits into several equilibrium phases. Therefore to determine the number of equilibrium phases and their compositions and quantities, a flash calculation is needed in each time step. So the required calculation time increases with an increase in number of components. This paper presents the simulation of CVD test for different equation of states (EOS's) such as Peng-Robinson (PR) and Soave-Redlich-Kwong (SRK) by utilizing MATLAB program and compares the results with data obtaining from laboratory. Current study demonstrated that Saving time and money is one of the benefits of simulating the CVD test instead of laboratory procedure and the results from simulation have only small error from laboratory. This method can be equally applied to other gas condensate samples.
Ključne riječi
constant volume depletion test; gas condensate reservoir; flash calculation; equations of state model; new algorithm
Hrčak ID:
80770
URI
Datum izdavanja:
30.4.2012.
Posjeta: 9.795 *