Abstract
Environmentally sustainable methods of extracting hydrocarbons from the reservoir are increasingly becoming an important area of research. Several methods are being applied to mitigate condensate banking effect which occurs in gas condensate reservoirs; some of which have significant impact on the environment (subsurface and surface). Electrokinetic enhanced oil recovery (EEOR) increases oil displacement efficiency in conventional oil reservoirs while retaining beneficial properties to the environment. To successfully apply this technology on gas condensate reservoirs, the behavior of condensate droplets immersed in brine under the influence of electric current need to be understood. A laboratory experiment was designed to capture the effect of electrical current on interfacial tension and droplet movement. Pendant drop tensiometry was used to obtain the interfacial tension, while force analysis was used to analyze the effect of the electrical current on droplet trajectory. Salinity (0–23 ppt) and electric voltage (0–46.5 V) were the main variables during the entire experiment. Results from the experiment reveal an increase in IFT as the voltage is increased, while the droplet trajectory was significantly altered with an increase in voltage. This study concludes that the interfacial tension increases progressively with an increase in DC current, until its effect counteracts the benefit obtained from the preferential movement of condensate droplet.
Highlights
In gas condensate reservoirs, reservoir fluids exist initially in gaseous phase but as the reservoir pressure declines below the dew point pressure, liquids condense out of the gaseous phase
Laboratory experiments to capture the effect of direct current on condensate droplets were performed
Results obtained from previous laboratory experiments reveal that an increase in the current introduced into the hydrocarbon saturated cores, leads to a corresponding increase in condensate displacement efficiency until a certain threshold of current is reached (Wentong Zhang et al 2019a, b)
Summary
Reservoir fluids exist initially in gaseous phase but as the reservoir pressure declines below the dew point pressure, liquids condense out of the gaseous phase. Keywords Interfacial Tension · Pendant Drop Tensiometry · Droplet Rise Velocity · Gas Condensate The effect of electric current of condensate droplets is captured vis-à-vis interfacial tension changes and movement of droplets due to electric field. The condensate droplet rises vertically through the brine solution in the absence of electric current.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
