Применение теплового воздействия в коллекторе двойной проницаемости, насыщенном высоковязкой нефтью. Теория

Abstract

HEAT TREATMENT APPLICATION FOR DUAL PERMEABLE HEAVY OIL RESERVOIR. THEORY Background Designing the enhanced oil recovery (EOR) methods decision to use the thermal treatment method is usually based on the laboratory experiments. In the case of the development of heavy oil dual permeable reservoir the laboratory data are insufficient because they do not reflect the processes of oil displacement in the presence of high heterogeneity of reservoir permability. Aims and Objectives to establish the influence of heterogeneity of reservoir permeability for dual permeable collector on the efficiency of heat treatment. Methods There were applied the hydrodynamic model which, on the one hand, contains data from laboratory studies, and on the other hand, simulates the macroproperties of collector. Results 1. Efficiency of heat treatment, i.e. hot water injection to the dual permeable reservoir depends on the residual oil production of fractured layers. Heat treatment of heavy oil deposits in dual permeable reservoir has a significant results in the case when the fractured layer till the beginning of the technology application has not been developed, but the effect from the use of that technology is significantly delayed from the start of application of the technology, i.e., requires injection of large volumes of hot water. 2. If the fractured layer till the beginning of the technology application is partially or fully developed, then the effect of injection of hot water is intermittent and not significant in magnitude. At the same time there is a rapid growth of watering; during the heat treatment of dual permeable reservoirs watering is almost always higher than during the isothermal flooding.