number of well location plans suffices as opposed to prior approaches that very often required several thousands of plans or more as a result a reduced number of computational flow simulations are required reducing the total computational effort as for selecting the set of parameters five per cluster in the particular example that gives as a result a particular well location p plan in a particular example the technique known in the art as design of experiments is used each set of parameters determine a well location plan the use of design of experiments provides a plurality of different plans according to the disclosed method some development plans comprise aside from production wells p injection wells i through which water is added to sweep the different regions of the domain u03c9 the injection wells i are in one particular example placed at the centroid of the pattern of the grid for instance the square pattern formed by every four neighbor nodes that set the locations of the production wells p for a certain cluster as can be seen in fig6 when one of the nodes p falls outside of the cluster at the other side of its boundary the centroid i is calculated with the remaining nodes p inside the cluster alternatively if the reservoir is susceptible to peripheral injection injectors i can be located at a strip shaped region s extending along a boundary f of the interface between water w and hydrocarbon o phases of the reservoir and located in the water side of the interface as shown in fig7 for determining the distance between injection wells i in the strip shaped region a new function the injectivity index ii is defined the.