OB oil field in the Niger Delta is not producing optimally because of decline in reservoir pressure and low recovery efficiency. The wells have been producing for over 50 years, so the equipments are faulty resulting in premature well abandonment. This work diagnosed the problem of the field, developed a systematic method of production enhancement, and modeled the reservoir, using eclipse 100 to perform multiple sensitivities on some variables to identity conditions for optimum production, and enhance the productivity of the well. The result shows that the mobility ratio of the field is 0.5 therefore water flooding is the best choice for increasing the pressure, also the maximum number of wells required is two production and three injection wells. The distance between injectors and producers is 9110ft. From the design short radius horizontal wells yielded optimum recovery but are discarded because of poor economic viability, hence vertical wells are the best choice for optimal production.