Skua flow simulation grid bringing geology to flow simulation. Disclaimer this report was prepared as an account of work sponsored by an agency of the united states government. It can also be configured to visualize geomechanical simulations from abaqus. Streamline simulation uses different computational methods from standard finitedifference reservoir simulators and is invariably faster than the traditional approach. This course introduces reservoir engineers and asset teams to the interactive petrel reservoir engineering tools to construct and manage simulation models in this course, you will build a 3d simulation model inside petrel based on geological input data, add wells, and well control rules, create black. Therefore local grid refinement capabilities are becoming more important in reservoir simulation as the enhanced recovery procedures being used become more complex with more localized phenomena. The porosity and permeability were generated from several layers the spe10 dataset, and then upscaled to various grid resolutions. Within each ensemble a number of simulation decks can be created, edited and run. Local grid rehernent for multiscale geothermal reservoir. The inserted grid may be cartesian center or radial upper left. Reservoir modeling and simulation in todays highperformance computing environments.
Scalar and vector grid properties associated to cells, faces, edges and nodes activeinactive elements grids and grid properties wells represented as xyz coordinates or ijk completions faults represented over the simulation model lgr local grid refinement nnc nonneighbor connections. Flow simulation using local grid refinements to model laminated reservoirs. Rezen provides a hierarchical data structure for managing all the simulation runs in a reservoir simulation project. Dynamic local grid refinement tu delft repositories. Local grid refinement near artificial fractures the advantage of edfm is that fractures do not affect the shape of matrix grid, but matrix grids too large would lead to sparse grids in and around fractures, making it difficult to describe the complex seepage process near the. Hanson and others, 2014 is a modflow2005 based integrated hydrologic model designed for the analysis of conjunctiveuse management. The aim of gridding in reservoir simulation is to turn the geological model of the.
The methodology targets individual cells for refinement based on forecasted compositional fronts calculated using streamlines and the analytical convectiondispersion transport equation. Three pairs of injectors and producers were placed inside three high permeability channels. Accuracy with which the geological description of the reservoir is matched discretisation of the flow equations heriot watt university, reservoir simulation course grid. Adaptive mesh refinement with the enhanced velocity method. Export the case from petrel and run simulations using eclipse blackoil. This is frequently obtained in structured grids by local grid refinement. Basics of reservoir simulation with the eclipse reservoir. Due to the large length scales of natural formations including petroleum reservoirs, reservoir simulators employ computational grid block sizes ranging from ten to. Dynamic local grid refinement for incomplete mixing. Our approach is theoretically based on multicontinuum. The validation tests show that the approach presented is capable of providing accurate production predictions without the well structure limitation and with shorter simulation times as demanded by the application of a full fine grid refinement.
Review is a 2d and 3d visualiser of reservoir simulation output data that is being integrated within rezen. The simulator can load the cornerpoint grids commonly used in the reservoir simulation industry. The unique feature of the simulator of this work is its reliance on local grid refinement for parallelization. One of the things that sets cmg apart is our entire focus on reservoir simulation research and development, and the delivery of sound, physics based, technical solutions that enable our customers to build models that accurately and reliably represent the recovery process. Reservoir modeling and simulation in todays highperformance.
There are two distinct classes of local grid refinement techniquesfixed and dynamic. Reservoir simulation is an area of reservoir engineering in which computer models are used to predict the flow of fluids typically, oil, water, and gas through porous media under the model in the broad scientific sense of the word, they understand a real or mentally created structure that reproduces or reflects the object being studied. Sep 15, 2016 the recent development of tight oil reservoirs has led to an increase in oil production in the past several years due to the progress in horizontal drilling and hydraulic fracturing. Nov 21, 2018 in order to analyze the productivity effectively and design the reasonable production pressure drop of multistage fractured horizontal well mfhw in tight oil reservoirs, a numerical simulation model for multistage fractured horizontal well is established to account for the threshold pressure gradient tpg, matrix permeability change due to stresssensitive effect and dynamic fracture closure. Extending resolution of fine cells nonuniformly, xyview 80 figure 24. The skua flow simulation grid module enables geoscientists and engineers to construct 3d reservoir grids that are optimal for numerical flow simulation. Jacobs koninklijkelshell exploratie en produktie laboratorium, rijswijk, the netherlands received may 9, 1986. The observed pressure and produced volumes of the two phases are matched with the simulated data to obtain. From the very outset of mufits development, the simulator was designed for parallel simulation using mpi interface. Aakoninklijkeshell exploratie en produktie laboratorium, rijswijk, the netherlands. With local grid refinement the same simulation program can be used to perform simulations either serially on a single processor or in parallel on multiple processors simply through data manipulation. Pico hoped to overcome this issue, improve simulation runtime, and increase productivity by moving to petrel reservoir engineering re software. Abstract a static local grid refinment technique has been developed and implemented in a three dimensional, three phase reservoir simulator. Adaptive mesh refinement and coarsening for compositional.
Resources train support contact login new features of results 2019 this video shows you some of the key new features found in results 2019, part of the 2019 general release. Application of the unstructured grids in the numerical. Bhp, whdp, oil, water, gas, liquid, reservoir volume rate constraints. Numerical simulation of productivity effects by hydraulic fracturing in a low permeability fluvial reservoir in the north sea keywords. The local refinement near the wellbore area of the unstructured grid and the simulation of the fracture model are shown in fig. Adaptive local grid refinement and multigrid in numerical. Automatic grid setting may be modified for specific studies such as coning. This article applies local grid refinements lgr integrated with upscaling. Local grid coarsening and handling convergence problems. How is local grid refinement reservoir engineering abbreviated.
Watch video basic and advanced features of results 2018 this video will help you with your analysis and give greater insights into your reservoir model. Grid coarsening may be used to amalgamate cells in regions of the reservoir which are less important to speed up simulation run times. The new ocean website uses tls for enhanced security. Under the model in the broad scientific sense of the word, they understand a real or mentally created structure that reproduces or reflects the object being studied. It is extremely flexible and can be used to simulate complex reservoir structures using several grid options such as rectangular grids, radial grids, corner point geometry and automatic grid generation. Use of domain decomposition and local grid refinement in reservoir simulation, vol. Local grid refinement, it is a widely used expression for the process of dividing one or several grids in the reservoir model into smaller sized grids allowing enhanced grid definition, which is useful for modeling wells or hydraulic fractures and other complex reservoir structures. Darcys law and conservation of mass, plus thermodynamic equilibrium of components between phases, govern equations that describe flow in. Output to other industry formats eclipse, resqml, etc 4. Usa this paper describes a controlvolume, finiteelement technique for coupling coarse grids with local. From geologic to numerical credibility pressim defines the reservoir. Modflow onewater hydrologic flow modelconjunctive use.
A controlvolume, finiteelement method for local mesh refinement in thermal reservoir simulation journal article forsyth, p a spe society of petroleum engineers reservoir engineering. The software utilizes all available computing resources and. The plugin generates local grid refinements at each specified fracture plane. Simulation study of co 2 eor in tight oil reservoirs with. Basics of reservoir simulation with the eclipse reservoir simulator lecture notes oystein pettersen dept. This is frequently obtained in structured grids by local grid refinement, replacing a set of cells in the original grid by a finer grid fig. Heinemann et al 1983 discuss dynamic grid refinement to improve the. The existing simulation model was also running too slowly, despite efforts to work around the problem by substituting the models local grid refinement lgr with upscaled critical water saturation. Two related issues are involved in choosing a grid for reservoir simulation. The simulations can be performed in parallel using supercomputers. The term integrated refers to the tight coupling of groundwater flow, surfacewater flow, landscape processes, aquifer. Local grid refinement lgr is applied in reservoir simulation routinely for structured and unstructured grids and implemented in commercial simulators. Simulation grid generation stair step, truncated, pebi unstructured local grid refinement lgr can be applied 2. Local grid refinement and curvilinear grids can be used to model areas of high activity such as near the well bores.
The handson exercises are structured to enable the trainee apply the software skills obtained during training and cover most of the petrel simulation. Rexcel is highly flexible and can handle a wide variety of scenarios. The local grid refinement lgr option allows enhanced grid definition in areas. Dynamic local grid refinement dlgr is a simulation technique that can adapt the spatial grid resolution to the scale at which the physical phenomena occur without refining the grid over the entire domain. A controlvolume, finiteelement method for local mesh. Local grid refinement for threedimensional simulators.
The simulator can also automatically create cartesian or radial grids for academic research studies. Heinemann et al 1983 discuss dynamic grid refinement to improve the resolution at flood fronts. Petrel reservoir geomechanics schlumberger software. Within one work environment you can manage large highly complex full field models or small mechanistic models. Reservoir simulation is an area of reservoir engineering in which computer models are used to predict the flow of fluids typically, oil, water, and gas through porous media. Flow simulation using local grid refinements to model laminated. The unstructured voronoi numerical model is common to saphir, topaze and rubis, only the local grid refinement around the wells will be different. It involves the use of local grid refinement lgr, a technique that refines the grid in specific areas. About resinsight is an open source, crossplatform 3d visualization, curve plotting and post processing tool for eclipse reservoir models and simulations. However, most papers on the subject published since mrosovsky et al 1973 focus on enhanced accuracy near wells. By using a small sector of the field reservoir model, two parallel horizontal wells were studied, one injector and one producer. Productivity simulation of hydraulically fractured wells. Rexcel is a petroleum reservoir simulation preprocessor.
The local grid refinement lgr option allows enhanced grid definition in areas needing a higher level of simulation accuracy, such as near wells or in areas of complex geology. The system can accommodate both block center and cornerpoint geometries as well as cartesian and radial local grid refinement and coarsening. The grid forms automatically and with the minimum number of cells for faster simulations. Pdf flow simulation using local grid refinements to model. These grids are true to the interpreted geology both in terms of structure and stratigraphy. Cmg began in 1978 as a small research company based in calgary, canada. Local grid refinement for threedimensional simulators onepetro. Therefore, an edfm model was est ablished by using fracture parameters obtained from the frac turing simulation software. Pdf flow simulation using local grid refinements to. This dissertation introduces a new method to create adaptive mesh refinement and coarsening in compositional reservoir simulation. This ensured a very good scaling of the computational problems.
The grid in reservoir modeling module and gridding module are all created from the watertight structural framework, which enables the structure of the reservoir property model to be consistent with the structure of the numerical simulation grid, honoring to high levels of accuracy the complete structural framework. Numerical solution of the flow equations 87 the impes method 89 solution of nonlinear equations the newtonraphson method 92. Modeling hydraulic fractures in finite difference simulators using amalgam local grid refinement lgr. Such grid refinements are useful around salt domes and along well paths. Property upscaling from grids of different sizes 3. In basin modelling, lgr has not yet been implemented. Therefore, there is an optimal grid refinement times. A parallel reservoir simulator based on local grid refinement. Multilevel local refinement and multigrid methods for 3d. With hydraulic fracture modeler you can either grid hydraulic fractures explicitly with local grid refinements, or as a reservoir property for dual porosity models. Streamlines, new plots, export to powerpoint, 3d viewer, quick plots. A local grid refinement lgr can be introduced to the pressim model and thus a higher resolution of the modelled pore pressure can be provided in an area. Adaptive local grid refinement and multi grid in numerical reservoir simulation. Local grid refinement is a technique which aims to provide improved accuracy in subregions of a reservoir simulation study.
A common requirement in reservoir simulation is an increased level of detail around an item of interest such as a well. Fivespot well pattern with local grid refinement for modeling % symmetry domain 21. File not yet available for viewing from off campus. Modeling hydraulic fractures in finite difference simulators. The term integrated refers to the tight coupling of groundwater flow, surfacewater flow, landscape processes, aquifer compaction and subsidence, reservoir. Grid building options for well centric models simple grid, tartan grids, locals grids, sector models and global simulation models pillar grids and structural grids, upscaling are discussed. Modflowlgr allows smaller parts of a larger model domain to be refined without refining the entire model. Reservoir fluids properties simulator pvt pro software.
Journal of computational physics 77, 140165 1988 adaptive local grid refinement and multi grid in numerical reservoir simulation g. Apr 07, 2020 the modflow onewater hydrologic flow model mfowhm. The next simulation shows how the adaptive mesh refinement can work with realistic heterogeneous reservoir properties. A project contains one or more ensembles, each ensemble representing a scenario the engineer wishes to investigate. Local grid refinement and curvilinear grids can be used to. This can be achieved by means of local refinement and coarsening of the computational grid dynamically at every time step where small scale. Third party tools for the sensor reservoir simulator. The software was designed to assist engineers and geoscientists build and managing complex models. Eclipse frontsim streamline simulator schlumberger software.
Local grid rehernent for multiscale geothermal reservoir simulation with tough2 julio garcia and karsten pruess earth sciences division may 2000. The local grid refinement, faults and aquifer options are available among others. Rexcel is easily configured to run hundreds or even thousands of realizations for uncertainty analysis. Rexcel is a reservoir simulation preprocessor designed specifically for the reservoir engineer. Rezen is a software tool for managing multiple reservoir simulation runs. Reservoir simulation with a controlvolume finite element method. Pressim 3d multipurpose pressure simulation software. Local grid refinement is used to simulate flow in grid elements intersected by fractures. Advanced reservoir simulation using eclipse blackoil. But when the grid refinement times reach a certain degree, the increase of calculation accuracy slows down, and the calculation amount of the model increases greatly.
The reservoir simulation chapter in the 1987 edition of the petroleum engineering handbook included a general description of reservoir simulation models, a discussion related to how and why they are used, choice of different types of models for different reservoir problems, and reliability of simulation results in the face of model assumptions. In the case of incompressible, heterogeneous reservoirs, the speed improvement can by many orders of magnitude. The following article demonstrates the use of local grid refinement for parallelization. The first introduces the concept of local grid refinement and applies it to both five spot pattern and field study examples. A numerical approach based on multigrid, multilevel local refinement, and preconditioning methods for solving incompressible reynoldsaveraged navierstokes equations is presented. Local grid refinement methods for basin modeling search and. Example where one cell in original grid has been replaced with an lgr 81 figure 25. The course covers following advanced eclipse and petrel reservoir engineering modules. The technique was used to study unitmobility displacement in a repeated five spot. It is used to add detail where justified by data availability and to keep a coarse resolution where less data are available. For lgr workflow, the user interactively sets fractures location, shape, size and orientation. Optimization of reasonable production pressure drop of multi. Lgr is defined as local grid refinement reservoir engineering somewhat frequently.
Gas cone near a horizontal well, fine grid, vertical cross section 79 figure 22. Lgr stands for local grid refinement reservoir engineering. A version of modflow, called modflowlgr for local grid refinement was developed mehl and hill, 2005 to support the use of locally refined grids to simulate groundwater flow. Hydraulic fracturing, reservoir simulation, local grid refinement, eclipse, petrel, fluvial reservoir pages. Reservoir simulation with a controlvolume finite element. Heinemann, et al used dynamic local grid refinement in a multiple application reservoir simulator.
230 526 47 386 1222 194 619 1508 1507 76 526 924 684 565 167 1143 802 1548 512 1559 1186 831 257 1039 573 276 470 518 104 625 516 988 143 782 456 297 1083 975 1316 883 96 615 1458 225 257 1365 196 299 773 898