Abstract: A method, apparatus, and program product model an Enhanced Oil Recovery (EOR) process in a subsurface volume by computer modeling a variable-concentration injection of an EOR agent in multiple grid blocks of a reservoir grid, where the variable-concentration injection includes an injection of the EOR agent at multiple injection concentrations. For a first grid block among the multiple grid blocks within which EOR agent is present, a viscous fingering effect is modeled by modifying a fluid mobility in the first grid block based at least in part upon the injection concentration of the EOR agent present in the first grid block.

Abstract: A method, apparatus, and program product model an Enhanced Oil Recovery (EOR) process in a subsurface volume by computer modeling a variable-concentration injection of an EOR agent in multiple grid blocks of a reservoir grid, where the variable-concentration injection includes an injection of the EOR agent at multiple injection concentrations. For a first grid block among the multiple grid blocks within which EOR agent is present, a viscous fingering effect is modeled by modifying a fluid mobility in the first grid block based at least in part upon the injection concentration of the EOR agent present in the first grid block.

Abstract: Embodiments of the present disclosure include one or more of a method, computing device, computer-readable medium, and system for prioritizing drilling propositions. An example embodiment of the present disclosure may include a method that includes providing a reservoir simulator for simulating a reservoir model, wherein the reservoir model defines a plurality of wells to be drilled. The method may further include storing model state information related to the reservoir model; calculating a potential production of at least a portion of the wells to be drilled by simulating one or more timesteps; and restoring the model state information to the reservoir model. In addition, the method may include using the reservoir simulator to simulate the reservoir model with a drilling priority, wherein the drilling priority is based on the calculated potential production.