Patent Document ID: 9896930
Application ID: 14014658
Patent Flag: 1

Claim One:
1. A method of obtaining in a computer measures of three dimensional pressure distribution in a subsurface reservoir during production of fluids from the subsurface reservoir to determine three dimensional reservoir pressure distribution in real time in the reservoir and monitor reservoir pressure distribution during the production of fluids, the reservoir being partitioned for modeling purposes into a reservoir model partitioned as an array of a grid of cells extending over the entire three dimensions of the reservoir, the reservoir having a plurality of production wells producing hydrocarbons, and a plurality of injection wells for injection of fluids into the reservoir to stimulate production, and with less than all of the production and injection wells serving as observation wells and having permanent downhole pressure measurement sensors installed to measure downhole pressure in the observation wells, the computer having a processor, a memory and a reservoir simulator, the method comprising the computer processing steps of: (a) receiving in the computer real time production pressure and flow rates during production of fluids from the production wells, (b) receiving in the computer real time injection pressure and flow rates from the injection wells during injection of fluids into the reservoir; (c) receiving in the computer real time downhole pressure measures from the downhole sensors in the observation wells based on measurements from the permanent downhole pressure measurement sensors during the production and injection of fluids in the observation wells; (d) obtaining measures of real time reservoir pressure for a partial pressure array of wells, the wells in the partial pressure array consisting of the observation wells, the measure of real time reservoir pressure being based on the received real time production and injection pressure data from the permanent downhole pressure measurement sensors in the observation wells; (e) receiving in memory of the computer the obtained measures of real time reservoir pressure for a partial pressure array of wells; (f) forming with the reservoir simulator simulated pressure measures for the cells of the full array of cells of the reservoir model extending over the entire three dimension extent of the reservoir; (g) obtaining with the processor of the computer measures of pressure differences between the real time reservoir pressure measures for the partial array of the observation wells and the simulated pressure measures for cells in the array of grid cells at locations of the permanent downhole pressure measurement sensors in the observation wells; (h) performing in the processor of the computer a geostatistical interpolation of real time pressure in the cells extending over the full array of the three dimensions of the reservoir based on the obtained measures of pressure difference between real time reservoir pressure for the partial array of the observation wells and the simulated pressure measures for the cells in the array of grid cells at locations of the permanent downhole pressure measurement sensors in the observation wells; (i) populating the reservoir model with real time upscale pressure for the cells extending over the entire three dimension extent of the reservoir based on the results of the performed geostatistical interpolation of real time pressure; (j) assembling in the memory of the computer the populated reservoir model with real time upscale pressure in the cells over the entire three dimension extent of the reservoir; (k) forming an output display of selected cells of the populated reservoir model with real time upscale pressure in the selected cells over the entire three dimension extent of the reservoir for determining three dimensional reservoir pressure distribution in real time in the reservoir and monitoring reservoir pressure distribution during the production of fluids; (l) identifying, based on the real time upscale pressure in the cells over the entire three dimension extent of the reservoir, high or low pressure regions in the reservoir; and (m) adjusting production rates of the production wells and injection rates of the injection wells to reduce reservoir pressure in the high pressure regions or increase reservoir pressure in the low pressure regions in the reservoir.