Print Email Facebook Twitter Tie-Simplex Parameterization of Operator Based Linearization for Isothermal Multiphase Compositional Flow In Porous Media Title Tie-Simplex Parameterization of Operator Based Linearization for Isothermal Multiphase Compositional Flow In Porous Media Author Konidala, Geetha Krishna (TU Delft Civil Engineering and Geosciences) Contributor Voskov, D.V. (graduation committee) Khait, M. (mentor) Degree granting institution Delft University of Technology Programme Petroleum Engineering and Geo-sciences Project Operator-Based Linearization Date 2018-10-31 Abstract Compositional flow simulation is the best practise to model the complex enhanced oil recovery process. This involves solving highly coupled and non linear flow, transport equations.Interaction of components within different phases and the fluid interaction with rock properties makes it difficult to accurately predict the natural flow process in the reservoir. Thisdemands for resolution models and accurate representation of flow process with realistic assumptions., which is quite challenging with conventional simulation.The newly proposed Operator based linearization (OBL) approach handles the problem in adifferent way. Governing equations are regrouped using state and space operators. The stateoperators are computed at the nodes of uniform mesh in parameter space and multi- linearinterpolation is performed during simulation. Uniformly distributed supporting points ignorethe underlying physics leading to higher interpolation error around the phase boundary anddemanding higher resolution to achieve the desired accuracy.The objective of “Tie simplex parameterization of Operator-Based Linearization for IsothermalMultiphase Compositional flow in porous media” is to parameterize the compositional spaceby accounting the underlying physics. A set of tie lines captures the phase boundary inparameter space at given pressure and temperature. Tessellation is performed by extendingthe tie lines to the entire compositional space. The supporting points are assigned along theextended tie-lines according to manually designed heuristics. After that, the parameterizedspace is tessellated further using Delaunay triangulation, and barycentric interpolation isperformed within each simplex.The efficiency of the developed approach is demonstrated in comparison with the uniformparameterization using 1D displacement of compositional two-phase fluid. The convergenceof non linear newton iterative solver is studied by applying the OBL framework with newlyproposed interpolation and existing Multi-Linear interpolation framework. Subject Reservoir simulationCompositional Flow and TransportOperator-Based LinearizationAdaptive ParameterizationTie-LinesPhase BehaviourBarycentric Interpolation To reference this document use: http://resolver.tudelft.nl/uuid:cd7c868c-8e17-46fa-98c3-b83001acdd98 Part of collection Student theses Document type master thesis Rights © 2018 Geetha Krishna Konidala Files PDF Thesis.pdf 9.49 MB Close viewer /islandora/object/uuid:cd7c868c-8e17-46fa-98c3-b83001acdd98/datastream/OBJ/view