Abstract: A method involves obtaining a measured drainage function for a well and obtaining a set of drainage models, wherein each drainage model includes a reservoir model and a fracture model. The method also includes, for each drainage model, forming a predicted drainage function based, at least in part, on the drainage model, and determining a misfit value based, at least in part, on the predicted drainage function and the measured drainage function. The method further includes determining a set of candidate drainage models based, at least in part, on the misfit value for each drainage model, wherein each candidate drainage model comprises a candidate reservoir model and a candidate fracture model.

Abstract: A method and system for both enhancing oil recovery of a reservoir and permanently sequestering carbon dioxide (CO2) is described. The method includes dissolving CO2 in a base fluid at a surface location of an injection formation, forming a dense CO2-brine solution, introducing the dense CO2-brine solution into an injection well, accumulating a volume of the dense CO2-brine solution in a structural low, displacing a native formation fluid from the injection well, increasing a fluid drive pressure from the injection well to a producing well, and displacing hydrocarbons of the producing well. The system includes an injection system in fluid communication with an injection well, a production well of the hydrocarbon production formation, and a dense CO2-brine solution that has a density greater than a native formation fluid of the injection formation.

Abstract: A computer system and method of automatically generating a Local Grid Refinement (LGR) gridded model of a gas reservoir. A geologic file includes information identifying the locations of one or more wells according to root grid cells within a volume of the earth to be modeled. User inputs specify the number of hydraulic fractures from each well, and such parameters as the fracture length, etc. User inputs also specify the number of “splits” of the root grid cells containing hydraulic fractures; those root grid cells are then split into finer resolution grid cells of increasing width within the root grid cells containing the fractures. For horizontal wells, user inputs indicate the number of splits of root grid cells containing the lateral portions of the wellbore. Non-orthogonal and complex fractures are processed by a “nested” LGR approach.

Abstract: The preferred embodiment of the instant invention preferably takes place in three stages. In the first stage, a determination is made as to which sands (or other reservoir bodies) are in fluid communication with the existing wells, and the disconnected sands are removed from the fine scale geological model. In the second stage, the transmissibilities in the fine scale model are upscaled to the coarse grid for direct use in the simulation. In the third stage the connected sands only are upscaled and a simulation is carried forward to the point when a new well is to be drilled. The pressure and saturation data are exported to combine with newly connected sands (reservoir bodies), and new pressure and saturation is calculated. The new values are exported in the simulation model and simulation run is continued.

Abstract: The preferred embodiment of the instant invention preferably takes place in three stages. In the first stage, a determination is made as to which sands (or other reservoir bodies) are in fluid communication with the existing wells, and the disconnected sands are removed from the fine scale geological model. In the second stage, the transmissibilities in the fine scale model are upscaled to the course grid for direct use in the simulation. In the third stage the connected sands only are upscaled and a simulation is carried forward to the point when a new well is to be drilled. The pressure and saturation data are exported to combine with newly connected sands (reservoir bodies), and new pressure and saturation is calculated. The new values are exported in the simulation model and simulation run is continued.