Upscaling of Water-Flooding Scenarios and Modeling of Polymer Flow
Doctoral thesis
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http://hdl.handle.net/11250/2388331Utgivelsesdato
2016Metadata
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Sammendrag
This thesis considers simulations of the fluid flow in petroleum reservoirs,
and includes work on upscaling methods and on modeling of polymer flood-
ing, which is a particular method of enhanced oil recovery.
The details of a small-scale model can have large impact on the flow
on larger scales, and upscaling is therefore an essential part of reservoir
modeling. We consider upscaling on the field-scale, investigate the balance
of forces during the water-ooding of a reservoir, and use this to asses
the applicability of different upscaling methods, and in particular steady-
state methods. Two novel upscaling methods based on the steady-state
assumption are suggested, and a comparison study is performed between
different methods through realistic field-scale simulations. Established two-phase upscaling techniques are also extended to include polymer properties.
As an alternative to upscaling, we also consider the application of a multiscale method to run polymer flooding simulations more efficiently. Using
the developed solver, we demonstrate that we are able to obtain fast and
accurate solutions on complex grids, using realistic and highly non-linear
ow physics.
Considering another aspect of polymer modeling, we address a known
issue with the mathematical model of an import physical effect of polymer flooding, the velocity enhancement due to inaccessible pore volume.
The conventional model may lead to ill-posed equations, and we propose
alternative formulations to obtain numerically more stable simulations.
Består av
Paper 1: Hilden, Sindre Tonning., Berg, Carl Fredrik Rate Dependent Force Balance and Upscaling of Unsteady Flooding Processes.Paper 2: Hilden, Sindre Tonning; Berg, Carl Fredrik. Comparison of Two-Phase Upscaling Methods on Field Models
Paper 3: Hilden,Sindre Tonning ; Lie, Knut-Andreas;Ray-naud,Xavier . Steady-State Upscaling of Polymer Flood. ECMOR XIV - Proceedings of 14th European Conference on the Mathematics of Oil Recovery http://dx.doi.org/10.3997/2214-4609.20141802
Paper 4: Hilden, Sindre Tonning; Møyner, Olav; Lie, Knut-Andreas; Bao, Kai. Multiscale simulation of polymer flooding with shear effects. Transport in Porous Media 2016. The final publication is available at Springer http://dx.doi.org/10.1007/s11242-016-0682-2
Paper 5: Hilden, Sindre Tonning; Nilsen,Halvor Møll; Ray-naud, Xavier. A Well-Posed Model of Inaccessible Pore Volume for Polymer