Abstract

One of the important things for petroleum engineers to do is evaluate the field to determine the number of reserves and characteristics contained in a reservoir, which is also useful for estimating the age of a reservoir based on production data. One way to estimate a reservoir is to use the decline curve analysis method which uses production rate and production time data. The total number of wells in the "M" field is 22 wells, but only six wells are producing and will be analyzed, namely wells M-1, M-10, M-13, M-15, M-16, and M- 22. In the decline curve analysis on the "M" field using the Loss Ratio method and OFM software. The results of the decline curve analysis calculation using the loss ratio method; in the M-1 well-obtained b = 0.6 (Hyperbolic decline), in the M-10 well-obtained b = 0.3 (Hyperbolic decline), the M-13 well-obtained b = 0.5 (Hyperbolic decline), the M-15 well-obtained b = 0 (Exponential decline), the M-16 well-obtained b = 0 (Exponential decline), and the M-22 well-obtained b = 0.2 (Hyperbolic decline).