Formation of Set of Injectors on Oilfields

This paper describes optimization of non-great oilfields work with complex geology. If oilfield has complex geology and great heterogeneity of its properties then non-regular grids is effective. There are two different strategies. First is to find rational placement of new injectors with the given placement of producers. Second is to find some producers rationally to convert them to injectors. In the first task the term ‘rational placement’ is a placement of injectors which provides possible minimum of total distance from injector to each connected producer and the average equality of connected producers to each injector. In the second task the term ‘rational conversion’ is a conversion when producers with maximum water cut and water production are converted to injectors, but the possible minimum of total distance from each injector to connected producers is provided. Included heuristic criteria and their levels of factor may vary depending on expert evaluation. It allows including not only geological and technical information and makes these algorithms very flexible. All tasks are formed in terms of integer programming, so they can be solved using special algorithms. Described models and algorithms are rational to use for making good initial reservoir work design.