Jin Song1, Qing Wang2, Imran Shaik3, Maura Puerto4, Prem Bikkina5, Clint Aichele6, Sibani L Biswal7, George J Hirasaki8. 1. Rice University, 6100 Main St., MS-362, Department of Chemical and Biomolecular Engineering, Houston, TX 77005, USA. Electronic address: js110@rice.edu. 2. Rice University, 6100 Main St., MS-362, Department of Chemical and Biomolecular Engineering, Houston, TX 77005, USA. Electronic address: qw10@rice.edu. 3. Oklahoma State University, 420 Engineering North, School of Chemical Engineering, Stillwater, OK 74078, USA. Electronic address: imran.shaik@okstate.edu. 4. Rice University, 6100 Main St., MS-362, Department of Chemical and Biomolecular Engineering, Houston, TX 77005, USA. Electronic address: Maura@rice.edu. 5. Oklahoma State University, 420 Engineering North, School of Chemical Engineering, Stillwater, OK 74078, USA. Electronic address: prem.bikkina@okstate.edu. 6. Oklahoma State University, 420 Engineering North, School of Chemical Engineering, Stillwater, OK 74078, USA. Electronic address: clint.aichele@okstate.edu. 7. Rice University, 6100 Main St., MS-362, Department of Chemical and Biomolecular Engineering, Houston, TX 77005, USA. Electronic address: biswal@rice.edu. 8. Rice University, 6100 Main St., MS-362, Department of Chemical and Biomolecular Engineering, Houston, TX 77005, USA. Electronic address: gjh@rice.edu.
Abstract
HYPOTHESIS: We present a systematic study of the "smart water" induced wettability alteration. This process is believed to be greatly affected by the brine salinity and the presence of Mg2+ and SO42- in the brine. EXPERIMENTS AND MODELLING: To characterize the wettability alteration, we perform spontaneous imbibition measurement using Indiana limestone cores and a model oil with added naphthenic acid. Both single-electrolyte-based and seawater-based "smart water" are tested to investigate the effect of Mg2+, SO42- and salinity on wettability alteration. Rock/brine and oil/brine zeta potentials are measured, and the electrostatic component of disjoining pressure is calculated to understand the role of electrostatics in the wettability alteration. The surface concentration of charged species on the limestone surface is analyzed based on a natural carbonate surface complexation model (SCM). FINDINGS: Both the reduction of Na+ and addition of SO42- are found to contribute to wettability alteration. Mg2+ is found to be unfavorable for wettability alteration. Ca2+ is believed to facilitate SO42- with wettability alteration based on the comparison between the single-electrolyte-based and seawater-based brines. The reduction of the Na+ surface complexation (>CaOH⋯Na+0.25) in low salinity brines is believed to be a critical mechanism responsible for wettability alteration based on the SCM calculations.
HYPOTHESIS: We present a systematic study of the "smart water" induced wettability alteration. This process is believed to be greatly affected by the brine salinity and the presence of Mg2+ and SO42- in the brine. EXPERIMENTS AND MODELLING: To characterize the wettability alteration, we perform spontaneous imbibition measurement using Indiana limestone cores and a model oil with added naphthenic acid. Both single-electrolyte-based and seawater-based "smart water" are tested to investigate the effect of Mg2+, SO42- and salinity on wettability alteration. Rock/brine and oil/brine zeta potentials are measured, and the electrostatic component of disjoining pressure is calculated to understand the role of electrostatics in the wettability alteration. The surface concentration of charged species on the limestone surface is analyzed based on a natural carbonate surface complexation model (SCM). FINDINGS: Both the reduction of Na+ and addition of SO42- are found to contribute to wettability alteration. Mg2+ is found to be unfavorable for wettability alteration. Ca2+ is believed to facilitate SO42- with wettability alteration based on the comparison between the single-electrolyte-based and seawater-based brines. The reduction of the Na+ surface complexation (>CaOH⋯Na+0.25) in low salinity brines is believed to be a critical mechanism responsible for wettability alteration based on the SCM calculations.
Authors: Joel T Tetteh; Anthony Pham; Edward Peltier; Justin M Hutchison; Reza Barati Ghahfarokhi Journal: Fuel (Lond) Date: 2021-10-05 Impact factor: 8.035
Authors: Joanna McFarlane; Victoria H DiStefano; Philip R Bingham; Hassina Z Bilheux; Michael C Cheshire; Richard E Hale; Daniel S Hussey; David L Jacobson; Lindsay Kolbus; Jacob M LaManna; Edmund Perfect; Mark Rivers; Louis J Santodonato; Lawrence M Anovitz Journal: ACS Omega Date: 2021-11-19
Authors: Jin Song; Sara Rezaee; Wenhua Guo; Brianna Hernandez; Maura Puerto; Francisco M Vargas; George J Hirasaki; Sibani L Biswal Journal: Sci Rep Date: 2020-02-28 Impact factor: 4.379