SEGJ Technical Conference

Electrical survey on shallow sea floor at the CO2 release test (QICS) site in UK

Abstract Electrical survey for estimating CO2 migration during a CO2 release test was conducted in 2012 and 2016 on the shallow seafloor at Ardmucknish Bay near Oban in UK. In 2012 a total of 4.2 ton CO2 was released for 37 days at a maximum flow rate of 210 kg/d at about 12m below the seafloor. The electrical self-potential (SP) and resistivity surveys were conducted during and after the CO2 release test. The analyzed resistivity structure showed that a positive resistivity anomaly was observed in a CO2 distributed area. SP increased according to a CO2 release flow rate increase.