Densities for Ternary System of CaCl 2 –H 2 O–CO 2 at Elevated P-T: An Experimental and Modeling Approach

Alireza Bastami, Peyman Pourafshary and Ali Shafiei
Additional contact information
Alireza Bastami: Institute of Petroleum Engineering, University of Tehran, Tehran 14155, Iran
Peyman Pourafshary: Department of Petroleum Engineering, School of Mining and Geosciences, Nazarbayev University, Astana 010000, Kazakhstan
Ali Shafiei: Department of Petroleum Engineering, School of Mining and Geosciences, Nazarbayev University, Astana 010000, Kazakhstan

Energies, 2018, vol. 11, issue 10, 1-19

Abstract: Very few thermodynamic models exist for estimation of density alteration due to solution of CO 2 in a pure H 2 O and CaCl 2 –H 2 O system. All of these models require density of CaCl 2 solution to estimate density of CaCl 2 –H 2 O–CO 2 system. Similarly, models presented to calculate CaCl 2 solution density need pure H 2 O density in advance. The main approach to model density of CaCl 2 –H 2 O–CO 2 system is based on estimation of density alteration of CaCl 2 –H 2 O system due to the solution of CO 2 mole fraction. Hence, to estimate CO 2 –CaCl 2 –H 2 O system density, density of CaCl 2 solution is necessary, and to estimate density of CaCl 2 –H 2 O system, density of pure H 2 O is required in advance. Firstly in this paper, density of 0, 1.91, and 4.85 mol/kg CaCl 2 solutions saturated with CO 2 at 328.15 to 375.15 °K and 68.9 to 206.8 Bar were measured through laboratory experiments. Then, a new model is developed to estimate the density of CaCl 2 solutions containing CO 2 based on the experiments conducted in this study. The average and maximum absolute deviations of the new model from the experimental data are 0.0047 and 0.0177, respectively. Hence, the new model combined with other existing models to separately calculate density of the CaCl 2 solution can be used to accurately predict density of the CaCl 2 –H 2 O–CO 2 system in a wide range of P-T applicable for subsurface reservoirs.

Keywords: CaCl 2 –H 2 O–CO 2 system; chloride solution density; density measurement; density estimation; well stimulation; matrix acidizing; limestone reservoirs (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/1996-1073/11/10/2840/pdf (application/pdf)
https://www.mdpi.com/1996-1073/11/10/2840/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:11:y:2018:i:10:p:2840-:d:177171

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().