Study on macro prediction method of oil production in oil field with multiple development modes

Abstract

With the large-scale popularization and application of new EOR technology, it is inevitable to face the problem of coexistence of multiple development methods, and the mechanism of new EOR technology is complex, there are many influencing factors, there is no mature prediction method, and the prediction of oil production is complex and heavy. How to use the simple, fast and small error method to calculate the oil production under the coexistence of multiple development modes has become an urgent problem. In this paper, the prediction method of oil production in different structure is established. By using the development indexes such as the macro oil production rate, the basic change trend of the development indexes under different development modes is studied and judged, so as to predict the annual oil production of the oilfield. Taking the EOR method of chemical flooding as an example, using the field practice of the block in which chemical flooding has been implemented for many years, the change trend of the macro oil recovery rate is predicted, and the oil production of the tertiary oil recovery of the oil field is determined according to the reserves of different scale. At the same time, the prediction results of the oil production of the whole oil field are obtained by combining the prediction results of the water drive oil production. It is verified by examples that the prediction accuracy can meet the needs of oilfield production, realize the rapid and accurate prediction of oil production in the field with multiple development modes, and solve the problem that there is no mature prediction method for new technology.