4D TEM Surveys for Waterflood Monitoring in a Carbonate Reservoir

摘要

Complex geology, post-depositional alteration, and physicochemical features of sediments and pore fluids often pose problems to reservoir development planning. Meanwhile, lapse-time (4D) shallow resistivity surveys may be a good tool to monitor waterflooding used for formation pressure maintaining and oil recovery enhancement in highly resistive carbonate reservoirs. Testing at an area developed by the Irkutsk Oil Company, with regard to key sweep efficiency criteria, has demonstrated good fit of injection volumes inferred from TEM data to real values. These results have been obtained for the first time for a carbonate reservoir in East Siberia and are useful to enhance petroleum production in the region.