Abstract
The upward migration of water and oil (exclusively under the action of capillary forces in fine channels of sedimentary rocks) is an area of theoretical and experimental investigation. Its knowledge allows the scientific explanation of the process of migration and accumulation of oil and water under the action of capillarity and from it derives more realistic guidelines in the geological investigation for the discovery of new hydrocarbon reservoirs. This paper presents the result of the personal experimental researches about the ascendency movement of the oil and water under the capillary pressure action. One show migratory heights and speeds, different for oil and water, as the oil fractionate in the time of the capillary movement.