Achieving important and effective reservoir parameters requires a lot of time and cost, and also achieving these devices is sometimes not possible. In this research, a dataset including 565 datapoints collected from published articles have been used. The input data for forecasting oil formation volume factor (OFVF) were solution gas oil ratio (Rs), gas specific gravity (γg), API gravity (API0) (or oil density γo), and temperature (T). We have tried to introduce two hybrid methods multilayer perceptron (MLP) with artificial bee colony (ABC) and firefly (FF) algorithms to predict this parameter and compare their results after extraction. After essential investigations in this study, the results show that MLP-ABC gives the best accuracy for predicting OFVF. For MLP-ABC model OFVF prediction accuracy in terms of RMSE < 0.002573 bbl/STB and R2 = 0.998 for this test dataset. After comparing the results of the experimental equations, it was concluded that the Dokla and Osman model gives the best results and Based on Spearman's correlation coefficient relationships all input parameters have a positive effect on OFVF prediction, which are as follows: Rs> T> API> γg and these results show that the effect of Rs is more than other input variables and the effect of γg is the lowest.