Tracer provide an efficient and direct measurement tool also to quantify the potential for enhanced oil recovery (EOR) projects and to measure the effect of EOR. For projects aiming at increasing sweep – such as polymer flooding, blocking off channelized flow etc., injection of chemicals gives a direct measure of the potential by assessing sweep volume.
By a repeated testing post-injection of the EOR chemical, the increment in sweep provides direct and quantified information of the EOR effect. For projects targeted at reducing residual oil (low salinity, CO2-flooding, surfactants, ASP) the partitioning inter-well tracer test (PITT) provide a similar quantification of the EOR effect through repeated measurement of saturation and direct calculation of saturation decrease. The latter is also available for single well pilots using RESMAN’s single well chemical tracer test (SWCTT) methodology.