Patent ID: 9411915
Filing Date: 2016-08-09
CPC Classification: G06F,G06Q

Claim Text:
1. A method of developing an underground reservoir from a set of images of the reservoir wherein a number of wells to be drilled in the reservoir is defined and locations are determined for the wells comprising: i) randomly generating well configurations with each configuration corresponding to possible well locations; ii) optimizing the configurations by calculating a first reservoir development quality criterion using a flow simulator applied to a limited number of reservoir images and by configuration simulation results previously obtained for configurations located within a distance to the configuration to be assessed with the distance being a function of the well coordinates; iii) calculating, for the optimized configurations, a second reservoir development quality criterion using a flow simulator applied to each image of the reservoir and selecting the well location corresponding to the optimized configuration having the best second quality criterion; and iv) drilling the wells at the selected locations; and wherein the first and second quality criteria correspond to a net present value characteristic of all images of the reservoir; and a first criterion Q is calculated using a formula as follows: with: NS being a number of configurations already simulated NM being a number of reservoir images considered, N {tilde over (C)} Cj being simulation result corresponding to the configuration in progress, for each one of the NM reservoir images considered pj being a weight assigned to each Cj {tilde over (p)}