1. A method for selecting geological data realizations, comprising: organizing a plurality of geological data realizations into respective arrays of geological property values, wherein each geological property value in an array is obtained from a grid location of a respective geological data realization, wherein the plurality of geological data realizations correspond to a geological area comprising a reservoir; clustering the arrays into two or more array groups based on a comparison of geometric locations of similar values within the respective arrays of geological property values; providing the two or more array groups at a user interface; receiving a selection of at least one array from the two or more array groups; and providing at least one of the plurality of geological data realizations corresponding to the selected at least one array to a geological model simulator configured to simulate fluid flow within the geological area for facilitating production of fluids from the reservoir.