Patent ID: 9745833
Date: 2017-08-29
CPC Classifications: E21B,G06F

Claim:
1. A method for optimizing oil recovery and reducing water production in a well, which comprises: a) calculating surface values for respective parameters of the well using static data for the well and at least one of dynamic data for the well and adjusted dynamic data for the well; said respective parameters of the well comprising at least one selected from the group consisting of well productivity index, water and oil flow rates, flowing bottom hole pressure, water cut and gas-to-oil ratio; wherein the static data for the well comprises at least one selected from the group consisting of well trajectory, well log profiles, relative permeability curves, pressure, volume, temperature, completion, well connection in horizontal section, permeability, initial saturation along well connection in horizontal section, valve coefficient, valve position and skin factor; and wherein said dynamic data comprises at least one selected from the group consisting of average oil, water and gas saturations and bottom hole pressure for each well connection and average static pressure for the well; b) performing history matching to compare the calculated surface values with real-time surface values for the respective parameters and to produce a misfit representing a surface model; c) adjusting one or more values in the dynamic data, which represents the adjusted dynamic data, and repeating steps a)-c) until the misfit representing the surface model is ≦10% with respect to the real-time surface values; d) calculating an optimal downhole valve setting for each completion zone in the well using a 3D grid simulation model and at least one of the surface model and a downhole model; e) updating the 3D grid simulation model using the adjusted dynamic data and a current downhole valve setting for each completion zone in the well; f) calculating a cumulative oil value over a predetermined forecasted time period at a predetermined forecasted time interval using the updated 3D grid simulation model and the current downhole valve setting for each completion zone in the well; g) calculating a maximum cumulative oil value over the predetermined forecasted time period at the predetermined forecasted time interval using the updated 3D grid simulation model and a new optimal downhole valve setting for each completion zone in the well that is based on a simulation to maximize the cumulative oil value; and h) using one of the optimal downhole valve setting for each completion zone in the well and the new optimal downhole valve setting for each completion zone in the well, adjusting the current downhole valve setting for each completion zone in the well to optimize oil recovery and reduce water production in the well.