Indonesia's oil production from year to year has decreased. The decline was because around 90% of the total oil production was produced from fields that were more than 30 years old, so a large investment was needed to contain the decline. The Java Sea Block is one of the oldest major blocks supporting Indonesia's oil and gas production with the production of 32,000 Barel Oil Per Day (BOPD) of oil and 167 Million Metric Standard Cubic Feet Per Day (MMSCFD) of natural gas, which has been operating since 1971. ZU Flowstation is one of the production fields that has been operating since 1984 with a production of 2000 – 2300 BOPD, has 24 artificial lift / Electrical Submersible Pump (ESP) wells with different characteristics. Production results fluctuate every year. This is due to the age of the old wells so they are not able to produce more oil. This study aims to maximize production results on the operating system by adjusting the frequency of the Variable Speed Drive (VSD) automatically. The approach used is the Optimization with Binary Programming method. The results showed an increase in production from 24 wells by 356 BOPD or 3.56%.