5 Remediation and Management of Produced Water for Beneficial Uses

Monday, 13 March 2023
10:00 AM - 12:00 PM
Room 109

DETERMINATION OF CO2 SOLUBILITY IN BRINES AND PRODUCED WATERS OF VARIOUS SALINITIES FOR CO2 EOR AND STORAGE

Paper number: 5-4
Program: Theme Sessions
Time: 11:00 AM – 11:20 AM

Authors

Abstract

To study the potential of carbonated water flooding (CWF), a subclass of CO2 EOR, for oil recovery and solubility trapping of CO2, one of the primary storage mechanisms of CO2 into the saline formations, it is imperative to have accurate estimations of CO2 solubility in brines and produced waters of various salinities as a function of pressure and temperature. In this study, we measured the solubility of CO2 in DI water, two produced water samples obtained from the oil wells located in Oklahoma, and 1, 3 and 5 M NaCl brines as a function of pressure in the range of 150 psig to 1200 psig at 65 °F (18 °C) using an in-house experimental method. The solubility of CO2 was found to have a strong exponential relationship with the density of aqueous brines and produced waters. The experimental results are found to be in good agreement with that of the data predicted using a state-of-the-art thermodynamic model for CO2 solubility in aqueous brines.

Geological Society of America Abstracts with Programs. Vol. 55, No. 1

doi: 10.1130/abs/2023SC-385150

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