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ECMOR VI - 6th European Conference on the Mathematics of Oil Recovery
- Conference date: 08 Sep 1998 - 11 Sep 1998
- Location: Peebles, UK
- ISBN: 978-94-6282-121-7
- Published: 08 September 1998
1 - 20 of 63 results
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Constraining a Reservoir Facies Model to Dynamic Data Using a Gradual Deformation Method
More LessIn this paper, we propose a new method for gradually deforming Gaussian-related stochastic models while preserving their spatial variability (reproducing their variograms). This method consists in building a continuous stochastic process whose state space is the ensemble of the realizations of a spatial stochastic model. The gradual deformation algorithm is combined with an optimization algorithm to calibrate stochastic models to nonlinear data. This paper focuses particularlyon the gradual deformation and iterative calibration of truncated Gaussian modeIs. The case study on the calibration of a reservoir facies model to weIl-test pressure data illustrates the efficiency of the proposed method. Although the method described in this paper is operational only in the Gaussian framework (e.g. lognormal model, truncated Gaussian model etc.), the idea of gradually deforming realizations through a stochastic process remains general and therefore promising even for calibrating non- Gaussian modeIs.
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Scaling Pressure Transient in Fluvial Channel Reservoirs by Inspectional Analysis
Authors S. -Y. Zheng, P. W. M. Corbett and G. StewartWell test interpretation is the analysis of pressure transient within an elapsed time. The parameters having impact on the pressure transient in a porous petroleum reservoir are those characterising reservoir geometry, fluid property and reservoir heterogeneity.
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Multi-Lateral Well Testing
Authors K. A. Hutcheson, A. Lacey and G. StewartHorizontal multi-Iateral completions, used in oil and gas recovery, can provide an economical alternative to standardproduction methods (see for example, Sugiyama et al 1997 and Jones et al, 1997). From a mathematical viewpoint the simplest multi-Iateral configurations, such as stacked laterals drawing from isolated compartments, require relatively straightforward solutions to the governing partial differential equation.
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A New Macroscopic Model for One-Phase Miscible Flow in Heterogeneous Media
By C. BarrouxPresently, the most attractive empirical models for representing macroscopically viscous fingering behavior in miscible displacements are from Fayers, Jouaux, and Tchelepi and from Todd and Longstaff named hereafter respectively FJT model and T&L model. Although successful in representing most of the cases investigated in their paper, the FJT formulation requires two phases and two components to represent the behavior of a single non ideally mixed phase with two components.
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The Effect of Connate Water on Gas Mixing in Porous Media - Non-Equilibrium Mass Transfer
Authors M. L. Verlaan and C. P. J. W. van KruijsdijkTo investigate the effect of immobile water on gas mixing in porous media, we conducted gas displacement experiments.
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Domain Decomposition Methods for Fluid Flow in Porous Medium
Authors F. Willien, I. Faille, F. Nataf and F. SchneiderWe wish to present recent works on matching interface conditions arising from Non-Overlapping three dimensional Domain Decomposition Method applied to multiphase fluid flow in porous medium with high heterogeneity jump across the interface.
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Prediction of the Relative Permeabilities for Steady-State Two-Phase Flow in Porous Media, Using a Mechanistic-Thermodynamic Model
Authors A. C. Payatakes and M. S. ValavanidesRecent experimental work has shown the existence of three basic flow regimes (patterns) during immiscible steady-state two-phase flow through porous media, namely GD (Ganglion Dynamics), DTF (Drop Traflic Flow) & CPF (Connected-oil Pathway Flow).
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Hybrid MPFA-Method with Application to Field Simulations
Authors I. Aavatsmark, Ø. Bøe and E. ReisoFor quadrilateral grids the multipoint flux-approximation (MPFA) method may be simplified to a two-point flux-approximation (TPFA) method by neglecting off-diagonal terms in a tensor which embodies the permeability and the geometry of the grid. Combining MPFA and TPFA results in a hybrid method which is faster than the full MPFA method.
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Unstructured Meshes for Complex Wells
By S. GaiffeIn reservoir simulation, a large number of situations where structured grids are unable to handle the complexity of geometry, as well as the spatial variation of physical properties of rock and fluids are encountered.
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Implementation of Three-Dimensional KPEBI Grids for Slanted Wells in a Fieldscale Reservoir Model
Authors G. F. Heinemann and S. BrockhauserThe paper presents an improved method for constructing 3-dimensional KPEBI grids taking into consideration variable K-tensors and internal surfaces (layers, faults and hydraulic fracture planes) near slanted or horizontal wells.
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Gravitational Segregation Problem Solved by Using of Flux Limiter Method
By Z. PrnicWe present here experience of using the second order scheme based on the flux limiter method for solving the gravitational segregation problem with the vertical permeability depending on the depth.
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Viscous Coupling and Two-Phase Flow in Porous Media
By K. LangaasIn this paper immiscible two-phase flow in simple geometries is investigated by simulations, This is done with a thermodynamically consistent Lattice-Boltzmann model of a binary fluid. The different pore-scale prototype flows serve as examples of two-phase flow in porous media and give input to the mathematical model of such flow on a macroscopie (Darcy) scale.
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Mathematical Modelling of Non-Equilibrium and Non-Linear Effects in Two Phase Fluid Filtration Flow
Authors M. M. Khasanov and G. T. BulgakovaThe physical nature of the non equilibrium processes in porous media is extremely diverse. These are phenomena of the phase redistribution in two phase flow resulting in the time dependence of the phase permeabilities, the phase interflow in micro heterogeneous media. The noted phenomena mostly govem the integral performance of the displacement of immiscible liquids. This paper addresses some the issues involved.
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Nonclassical Models of Multiphase Flows Through Porous Media
Authors V. M. Maximov, A. V. Kolesnichenko and N. M. DmitrievModern methods of oil and gas fields development are based on the classical theory of nonmixing fluid filtration developed in the researches of Muskat M., Jeverett M. and their followers. The base of that theory is hypothesis of capillary pressure and relative phase permeabilities as universal equilibrium, stationary functions of instant saturation.
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Dynamic Capillary Model for Two-Phase Flow Through Media with Heterogeneous Wettability
Authors I. Panfilova, A. Shakirov, A. Kukharonok and M. PanfilovA new model is developed to simulate the flow in porous media with heterogeneous wettability, when the wettability scale is larger than one pore scale. A new vector "dynamic" capillary field is introduced in the equation of momentum of motion for each fluid phase.
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Three-Phase Hydrocarbon Migration and Trapping - a Dynamic Theory
By H. M. HelsetA study of secondary migration of hydrocarbons from a source rock into possible reservoirs is presented. In particular simultaneous migration of oil and gas through a water-filled carrier bed is considered.
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