Prediction of Molar Volumes of the Sudanese Reservoir Fluids. (11th April 2010)

• Record Type: Journal Article
• Authors: Rabah, A. A.; Mohamed, S. A.
• Other Names: Balbuena Perla B. Academic Editor.
• Is Part Of: Journal of thermodynamics. Volume 2010(2010)
• Publication Date: 2010-04-11
• Subjects: Thermodynamics -- Periodicals; Thermodynamics; Periodicals; Electronic journals; 536.7
• DOI: 10.1155/2010/142475
• Languages: English
• ISSNs: 1687-9244

Abstract

Abstract : This paper provided important experimental PVT data of the Sudanese reservoir fluids. It includes composition analysis of 11 mixtures and about 148 PVT data points of constant mass expansion (CME) tests at pressures below the bubble point. The datasets are compared with eight equations of state (EOS), namely, Peng Robinson (PR), Soave-Redlich-Kwong (SRK), Lawal-Lake-Silberberg (LLS), Adachi-Lu-Sugie (ALS), Schmidt-Wenzel (SW), Patel-Teja (PT), Modified-Nasrifar-Moshfeghian (MNM), and Harmens-Knapp (HK). The results of comparison reveals that, with the exception of PR and ALS EOSs, all other EOSs yield consistently a higher average absolute percent deviation (AAPD) in the prediction of molar volume; it exceeds 20% by all mixtures. The grand average AAPD of all mixtures is 17 and 16 for PR and ALS, respectively. ALS is selected to represents the mixtures. It is modified by replacing the coefficient (Ω b 1 ) of the parameter (b 1 ) in the dominator of repulsive term by that of PR. This procedure enhanced the accuracy of ALS by 30 to 90% for individual mixtures and the grand average AAPD is significantly reduced from 16 to about 7.