Abstract: The ground water injection system is the important part of oil field flooding system , its programming influences the investment and running cost of total system. The programming method of the ground flooding system was studied in this paper and the total optimization problem was separated two parts , the programming of water injection branch line and that of water injection trunk line. In the programming of water injection branch line , a mathematical model aimed at system investment and reliability was proposed , the resolve method of this model was also provided. In view of the features of water injection trunk line , the optimization of trunk line and the minimum investment was reached through optimization of pump station position , defining the alignment of main trunk line and the intersection point of trunk line and branch line under the situation of meeting the demand of water injection technology.

Key words: Ground water injection system, MultiOobjection programming, Reliability