The Duri experiment

A 4-D seismic monitoring experiment has been conducted by CalTex to monitor a steamflood in a viscous oil reservoir in the Duri Field, Sumatra, Indonesia. Multiple 3-D seismic surveys were recorded over a 7-spot steam injection pattern during a period of two years. Two baseline surveys were acquired before steam injection to test experimental repeatability. Five monitor surveys were recorded at an average 4 month interval, ranging from 2 to 19 months after steam injection was initiated. Two temperature observation wells are available, and six core samples were taken from the injector borehole before steam injection at various levels of the reservoir zone.