A review of tracer testing techniques in porous media specially attributed to the oil and gas industry

Abstract The significance of the tracer testing technique is widely accepted in reservoir performance analysis hydrology as well hydrocarbon exploration and production. subsurface delineation for optimum production one most critical aspects petroleum system analysis. quality its prediction require extensive knowledge qualitative geology, depositional environment, facies heterogeneity engineering properties formations. Tracer amongst few techniques available oil gas (O&G) industry, which stands up to these expectations successfully used quantitative determination sub-seismic scale structural stratigraphic heterogeneities. also being utilized determining residual saturation ( S or ) lateral correlation subsurface. Apart from O&G concentration-based applications have been proved hydrology, geothermal medical science. A comprehensive review presented explain application investigate porous media, mainly industry. type tracers used, their selection criteria, concentration, natural versus gradient a are discussed current review. Generally, two types (chemical radioactive) preferred industry gas/fluid flow assessment, waterflood optimization establishing connectivity between multiple wells. paper reviews both tests, namely single inter well, detail discussing objectives, calculations, designing, injection, sampling, laboratory integration. preliminary aim was provide evaluation well-to-well