Abstract:
The forecasting of oil production rates is one of the most important problems of reservoir engineering, and the efficiency of flooding management, as well as the development of the field as a whole, directly depends on the quality of its solution. Traditionally used 3D hydrodynamic models often do not allow obtaining modeling results promptly, and the quality of forecasts significantly depends on the adequacy of the geological model used (which is usually constructed using highly uncertain data) to the actual development object. As a result, there is a demand among reservoir engineers for simpler forecasting tools, an example of which is capacitance-resistivity modeling (CRM), as a special case of material balance models. Along with traditional CRM models applicable only to water and oil production, some modifications of such models have been described that also allow to take into account the influence of gas as a separate phase. Such models can improve the accuracy of connectivity factors estimations and such important parameters as compensation and the injection efficiency of each injector. However, methods for obtaining of oil flow rate forecasts using such models are not obvious. This article proposes one of the possible methods that allows to improve the accuracy of oil production forecasts obtained using CRM modeling by taking into account the of free gas production rates.
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