METHOD FOR ESTIMATING RECOVERY FACTOR OF CARBONATE RESERVOIRS AND METHOD FOR ASSESSING CARBONATE RESERVOIRS USING THEREOF

摘要

The present invention relates to a method of predicting a recovery factor of a carbonate reservoir which is used for obtaining characteristics of the carbonate reservoir, and a method of evaluating the carbonate reservoir using the same. According to the present invention, problems of conventional carbonate reservoir recovery factor predicting method, such as the difficulty in predicting a recovery factor required for evaluating a carbonate reservoir due to complexity and heterogeneity of a carbonate reserving layer and a low reliability due to a low correlation between a calculated recovery factor prediction value and an actual recovery factor value measured, are solved. By using the carbonate reservoir recovery factor predicting method and a carbonate reservoir evaluating method using the same according to the present invention, a geographical qualitative degree is evaluated by considering characteristics of a carbonate reserving layer and a reservoir fluid and characteristics of a production estimation method, and reflecting the geographical qualitative degree on a quantitative method, such that reliability of a recovery factor prediction value of the carbonate reservoir can be improved. Also, there are provided a carbonate reservoir evaluating method and an evaluation system which are implemented to improve reliability by reflecting geographical characteristics of the reservoir and the reserving layer. The carbonate reservoir evaluation system comprises a database; a recovery factor estimating unit; and a reservoir evaluating unit which is configured to perform a process for evaluating the carbonate reservoir based on the recovery factor prediction value.