Patent ID: 8589135
Filing Date: 2013-11-19
Classification: E21B,G06F

Abstract:
1. A system to determine static well pressures for one or more arbitrary shaped wells in both homogeneous and heterogeneous reservoirs, the system comprising: a reservoir simulator computer having a plurality of processors, an input device, an output device, a memory containing first, second, third, fourth, and fifth databases, the first database including a plurality of fluid flow flux vectors, the second database including a plurality of drainage boundaries, the third database including a plurality of effective drainage volumes, the fourth database including a plurality of grid block pressures, and the fifth database including a plurality of computed static well pressures; fluid flux program product to determine fluid flux between adjacent grid blocks, the fluid flux program product stored in the memory of the reservoir simulator computer and comprising instructions that when executed by the reservoir simulator computer, cause the reservoir simulator computer to perform, for each of a plurality of grid blocks contained within an effective drainage volume of each of one or more wells at each Newton iteration of a finite difference grid centered reservoir simulator, the operations of: drainage boundary program product to determine three-dimensional boundaries of the effective drainage volume for each of the one or more wells, the drainage boundary program product stored in the memory of the reservoir simulator computer and comprising instructions that when executed by the reservoir simulator computer cause the reservoir simulator computer, to perform for each of one or more drainage planes of a respective one or more well segments each oriented perpendicular to a direction of the one or more well segments of the respective one or more wells and including a face of a perforated grid block and a face of each of a plurality of grid blocks adjacent thereto, the operations of: static well pressure program product to determine static well pressure for each of the one or more wells, the static well pressure program product stored in the memory of the reservoir simulator computer and comprising instructions that when executed by the reservoir simulator computer cause the reservoir simulator computer to perform the operations of: