稠油地下改质开采技术及发展趋势

As an important unconventional crude oil resource in the world, heavy oil is a significant resource that guarantees country's energy security, and major engineering needs. At present, heavy oil reservoirs which currently developed by conventional thermal recovery technology are entering the later stage of recovery. The problems of high energy consumption, high pollution and high cost in those reservoirs are becoming more and more serious, so it is in urgent need of recovery technology upgrading. In-situ upgrading of heavy oil is an irreversible reduction of viscosity in the reservoir, which is recognized as one of the most remarkable next-generation heavy oil recovery technologies in recent decade. This paper expounds the technical connotation from the technical mechanism, the modification catalyst and the effect of the production. Based on a large number of representative achievements of major research institutions and enterprises in domestic and overseas, comprehensive classification statistics were conducted on related researches of domestic and overseas according to the type of catalyst, reaction temperature and viscosity reduction effect. Existing field tests are compared by the production method and production effect. Aiming at two key-restricting problems, the next development direction is put forward.