A New Method for Calculating the Proportion of Production and Injection Wells in Offshore Oilfield

According to the calculation method of the reasonable proportion of oil and water injection wells of waterflooding in onshore oilfields,and in consideration of the realistic production and injection conditions and liquid treatment capacity on the platform of offshore oilfields,a new calculation method suitable for offshore oilfields was established.The methods were compared with the other available ones.The result shows that limitation of liquid production has significant influence on calculation result,the influence the injection-production ration under unbalanced injection-production condition is the next,the influence of fluid property is relatively small,the studied calculation method provides a base for setting a plan for new offshore oilfields and adjustment scheme for matured oilfields for improving fluid treatment capacity.