Laboratory measurement of oil viscosity reduction due to CO2 injection at high-pressure, high-temperature conditions. (6th September 2022)

• Record Type: Journal Article
• Authors: Alghawi, Yaser; Rahnema, Hamid; Parra, Edgard
• Is Part Of: International journal of oil, gas and coal technology. Volume 31:Number 3(2022)
• Page Start: 242
• Page End: 262
• Publication Date: 2022-09-06
• Subjects: viscosity -- viscometer -- rolling-ball -- carbon dioxide -- CO2 -- crude oil -- enhanced oil recovery -- EOR; Petroleum as fuel -- Periodicals; Gas as fuel -- Periodicals; Coal -- Periodicals; Biomass energy -- Periodicals; Hydrogen as fuel -- Periodicals; 662.6
• Languages: English
• ISSNs: 1753-3309

Abstract

This work presents the use of rolling-ball viscometer to measure viscosity reduction of two dead oil samples injected with CO2 at a temperature of 168°F and a pressure range of 1, 114.7 psi-3, 514.7 psi. First, a new digital control unit was designed to replace the analogue unit. Afterwards, viscometer was calibrated with Cannon S-6 and S-60 viscosity standards. Next, validation was conducted by measuring the viscosity of n-decane at a temperature range of 77°F-266°F and a pressure range of 514.7 psi-2, 014.7 psi. Next step was the investigation of CO2 effect in reducing n-decane viscosity at 130°F-266°F temperature range and 1, 014.7 psi-2, 014.7 psi pressure range. Results showed significantly reduced viscosities of the CO2 mixture compared to n-decane viscosities, especially at lower temperatures. Afterwards, viscosity of two distinct crude samples was measured at 168°F and 14.7 psi-3, 514.7 psi pressure interval. Next, CO2 was injected to respective oil samples and system viscosity was measured at the same temperature and at pressures between 1, 114.7 psi and 3, 514.7 psi. [Received: September 20, 2021; Accepted: January 30, 2022]