- Home
- Conferences
- Conference Proceedings
- Conferences
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
21 - 40 of 63 results
-
-
Segmented Coordinate Line Based Unstructured Grids
Authors D. Gunasekera, J. Herring and J. CoxCoordinate line based corner point grids have been used for petroleum reservoir simulation with a high degree of success. A coordinate line is a vertical or a near vertical line on which nodes of grid cells exist. Their application to unstructured grids has also been presented. Previous work is based on straight coordinate lines (within a single reservoir), whereas this paper presents an algorithm for creating coordinate lines with multiple straight line segments, as well as their application to unstructured grids. This approach is particularly powerful for handling complex fault structures such as slump faults and Y faults.
-
-
-
Flexible Streamline-Potential Grids with Discretization on Highly Distorted Cells
Authors R. Agut, M. G. Edwards, S. Verma and K. AzizCritical reservoir features such as faults, fractures and highly correlated channels can have a high degree of geometric complexity with regions containing very high curvatures within their description. Conventional simulators are generally unable to provide arealistic representation of such features.
-
-
-
An Application of Triangulations to the Building of Structured Grids
By C. L. FarmerWe investigate a generalisation of classical boundary fitted structured grid generation to include additionallines - called controllines - to be honoured in the interior. See Thompson et al. [5] or Knupp [2] for reviews of boundary fitted grid generation. As far as we are aware, except for Hales [1], there is no literature conceming this generalised problem. We call the region enclosed by the boundary the domain. The problem occurs, for example, as a stage in generating grids to honour geological structures. In such applications the two sets of lines are extracted from faults and the boundary curve. We refer to the articles of Petterson [3] and Ponting [4] for background.
-
-
-
Application of Random Walk Methods on Unstructured Grids to Up-Scale Fractured Reservoirs
Authors B. Noetinger and T. EstébenetGeologists are now able to generate high resolution reservoir images containing a very large number of fractures of any size and shape. To improve the applicability of these representations to forecasting dynamic production data, one must be able to perform fluid flow simulations.
-
-
-
Modelling of Flow in a Reservoir with Multiple-Length-Scale Fractures
Authors S. H. Lee and M. F. LoughThis paper describes a finite difference model for flow in a naturally fractured reservoir. Our model is based on calculating the effective perrneability of a fractured reservoir, as a function of grid block size, and using the results in a conventional finite difference reservoir simulator.
-
-
-
Preconditioning Methods for Coupled Reservoir and Facility Models
Authors T. J. Byer, M. G. Edwards and K. AzizThe fully implicit coupling of surface facilities with a reservoir model can lead to a significant increase in computing time. The focus of this paper is on the development of methods that can minimize the impact of the facility model on the global solution procedure. A local grid refinement preconditioner is developed to accelerate convergence of the full flow field implicit simulation.
-
-
-
A Novel Approach for Multi-Purpose Reservoir Simulators Using Mixed Models
By L. J. GanzerAll the time, improved or novel numerical models are proposed in order to simulate more and more complex fluid processes and hydrocarbon recovery schemes
-
-
-
Flow Simulation in Heterogeneous Reservoirs Using the Dual Reciprocity Boundary Element Method and the Green Element Method
Authors R. Archer and R. N. HomeGreen's functions are established tools for solving petroleum engineering flow problems. Their utility and rigor was extended to arbitrarily shaped reservoirs using the Boundary Element Method (BEM).
-
-
-
Gas Network Model with Full Reservoir Coupling
More LessA gas network flow model (GASNET) has been developed and coupled to an existing in-house reservoir simulator, thus allowing improved modeling of the interaction between reservoir, wells and pipeline networks. The model is a three-phase formulation which is modified to handle gas condensate systems.
-
-
-
Simulation of Nonlinear Immiscible Displacement by an Operator Splitting High Order Godunov-Mixed Finite Element Method
Authors S. Mantica and A. CorninelliImmiscible displacement can be modelled by a system of partial differential equations which includes a parabolic-elliptic equation for pressure and a non-linear advection-diffusion equation for saturation. The main issue of this paper concerns the numerical integration of the saturation equation, using an operator splitting (OS) approach to decouple diffusive from advective forces. In this framework, an hyperbolic conservation law is first integrated by an explicit high order Godunov method. Next, a degenerate parabolic equation for the diffusion step is approximated implicitly either on regular or unstructured grids using mixed finite elements (MFE) or multipoint flux approximation (MPFA), respectively. Numerical results are given to validate the effectiveness of the sequential formulation under a wide range of flow regimes.
-
-
-
Numerical Well Test Modelling in a Full-Field Simulator Offers New Opportunities for Reservoir Characterization
Authors A. Abdelmawla and Z. HeinemannNumerical models for the simulation of well tests have effectively been limited to single well models owing to the small grid size and time step needed. This paper introduces well test simulation in full-field scale models. This allows better reservoir characterisation and improved history matching by screening of possible reservoir geological realisations through matching of measured test data. The concepts of windows and dual time steps as implemented for well test simulation are explained in this paper.
-
-
-
Efficient Phase Equilibria Calculations in a Reduced Flash Context
Authors D. V. Nichita and F. MinescuCompositional models for hydrocarbon reservoirs become, every year, a better and better instrument for the evaluation of reservoir production. The phase equilibria calcuation represents one of the keys of the compositional simulator performance. Irrespective to the algorithm used to ensure the convergence toward the solution, all clasical models of two-phase flash calculation iterate on n independent variables (molar fractions, number of moles and logarithms of K-values), n being the number of components in the mixture
-
-
-
Seismic Wave Propagation in an Upscaled Poroelastic Medium
By B. LenoachWe study wave propagation in a random poroelastic media in the case where the constitutive parameters fluctuate substantially over finite distances. We are partly motivated by the application of these models to issues of seismic reservoir characterisation and monitoring.
-
-