By Jan Dirk Jansen

this article types a part of fabric taught in the course of a direction in complex reservoir simulation at Delft collage of expertise over the last 10 years. The contents have additionally been offered at a variety of brief classes for business and educational researchers attracted to historical past wisdom had to practice examine within the quarter of closed-loop reservoir administration, often referred to as clever fields, on the topic of e.g. model-based construction optimization, info assimilation (or historical past matching), version aid, or upscaling options. each one of those subject matters has connections to system-theoretical concepts.
The introductory a part of the direction, i.e. the structures description of stream via porous media, types the subject of this short monograph. the most aim is to give the vintage reservoir simulation equations in a notation that allows using options from the systems-and-control literature. even if the idea is restricted to the fairly uncomplicated state of affairs of horizontal two-phase (oil-water) move, it covers a number of commonplace facets of porous-media flow.
The first bankruptcy provides a quick assessment of the elemental equations to symbolize single-phase and two-phase movement. It discusses the governing partial-differential equations, their actual interpretation, spatial discretization with finite changes, and the therapy of wells. It includes recognized idea and is basically intended to shape a foundation for the subsequent bankruptcy the place the equations may be reformulated when it comes to systems-and-control notation.
The moment bankruptcy develops representations in state-space notation of the porous-media circulate equations. The systematic use of matrix partitioning to explain the differing kinds of inputs ends up in an outline when it comes to nonlinear ordinary-differential and algebraic equations with (state-dependent) method, enter, output and direct-throughput matrices. different themes comprise generalized state-space representations, linearization, removing of prescribed pressures, the tracing of movement strains, elevate tables, computational elements, and the derivation of an power stability for porous-media flow.
The 3rd bankruptcy first treats the analytical answer of linear platforms of normal differential equations for single-phase circulate. subsequent it strikes directly to the numerical answer of the two-phase move equations, protecting quite a few elements like implicit, specific or combined (IMPES) time discretizations and linked balance concerns, Newton-Raphson generation, streamline simulation, computerized time-stepping, and different computational elements. The bankruptcy concludes with easy numerical examples to demonstrate those and different features reminiscent of mobility results, well-constraint switching, time-stepping facts, and system-energy accounting.
The contents of this short may be of price to scholars and researchers attracted to the applying of systems-and-control techniques to grease and gasoline reservoir simulation and different functions of subsurface circulation simulation reminiscent of CO2 garage, geothermal power, or groundwater remediation.

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A Systems Description of Flow Through Porous Media (SpringerBriefs in Earth Sciences) by Jan Dirk Jansen


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