An alternative to classical well testing is numerical simulation. Classical reservoir simulators allow for simulation of multiphase flow in heterogeneous reservoirs with special variations of reservoir properties including pay zone thickness, fluid saturation, porosity, permeability, and in inclusion of faults and multiple wells. Although a number of methods for calculating dynamic pseudofunctions have been. Read estimation of pseudo relative permeability curves for a heterogeneous reservoir with a new automatic history matching algorithm, journal of petroleum science and engineering on deepdyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips. Unit conversion in petroleum office is based on unitconverter excel function which is part on addin function library. The simulated cases also covered all multiphase flow situations. These generalized multiphase pseudofunctions were validated through the analysis of many simulated drawdown and pressure buildup tests covering comprehensive inner radial wells, partial penetration, fractured, and horizontal wells. Pdf a pseudo function approach in reservoir simulation. Reservoir simulation process reservoir simulation is briefly. Reservoir engineering techniques for forecast, reserves estimation. The simplest method uses straight lines between end points. A new pseudo steadystate constant for a vertical well with finiteconductivity fracture yudong cui 1.
A pseudo function approach in reservoir simulation. Introduction to flow simulation as used in reservoir. The first application of pseudo relative permeability in simulation of singleporosity reservoir models is attributed to hearn 1971. Basics of reservoir simulation with the eclipse reservoir simulator lecture notes. New transfer functions for simulation of naturally. A new pseudo steadystate constant for a vertical well. Nicholas geweckey zhen liz andrea rubianox robert shuttleworthbo yang k xinghui zhong august 23, 2009 abstract numerical reservoir simulation models are used in the energy industry to forecast the. Popular categories of units can be found on ribbon, select cell, choose units and you have your answer. Simulation of petroleum reservoir performance refers to the construction and operation of a model whose behavior assumes the appearance of actual reservoir behavior. Evaluation of dynamic pseudo functions for reservoir simulation. The second half of the book describes advanced studies, compositional modelling. Estimation of pseudo relative permeability curves for a.
I would like to thank the companies supporting the reservoir simulation industrial. Therefore, reducing the number of grid cells, and in turn averaging reservoir properties within them, is desirable in order to make running simulations more feasible. Pdf basics of reservoir simulation with the eclipse. Stone 1991, and a new flux weighted potential fwp method. Upscaling of relative permeability using pseudo functions taylor. To reservoir engineers, the study of pseudo functions for the cross sectional models of di.
To reservoir engineers, the study of pseudo functions for the cross sectional models of difierent types itself is the study of numerical simulation sensitivity of displacement processes in reservoirs. The results showed that the upscaled relative permeability curves pseudo functions succeeded in compensating for subgrid heterogeneity and numerical dispersion so that the coarse models reproduced the fine models results. Heriot watt university, reservoir simulation course pseudo property measured on core plugs. Pdf an improved procedure for generating pseudo relative. There are several published methods for predicting pseudo relative permeabilities. Mathematical model computer codes numerical model physical model figure 1. In the blackoil model, two pseudo components, namely, oil and gas, are used to describe the hydrocarbon. Introduction webster defines simulate as to assume the appearance of without reality. Schlumberger, eclipse 100 reference manual 2005a, 2005. While reservoir simulation is a programming tool comprises of physics and thermodynamic principles in mathematical equations as a representative of reservoir rock mass and energy balance 2.
Reservoir simulation applications vary at different stages of production life depending on the available data. This paper presents a detailed investigation on the reliability of the. In particular, the author shows how to link geology and simulation inputthe most critical aspect of successful reservoir simulation. Petroleum engineering calculations in microsoft excel. Fast computational methods for reservoir flow models teng chen. Reservoir simulation an overview sciencedirect topics.
Detailed geological models usually contain multimillion grid cells, which makes the running of reservoir simulation difficult and time consuming. A015 classification of pseudo functions using statistical analyses 1 pierre samier 1 eline bagnolet 2 philippe dupouy 3 jean paul valois 1 1 total cstjf avenue larribau 641018 pau cedex france 2 imperial college earth science and engineering london uk 3 total yemen sanaa yemen abstract in reservoir engineering although upscaling absolute permeability is now a. Effective models of fractured systems stanford university. The blackoil model is widely used in reservoir simulation. The readers have to work with a sophisticated reservoir simu lator to deepen their theoretical knowledge too. In this paper we develop a pseudo function approach to obtain relative permeabilities for the numerical simulation of threedimensional petroleum reservoirs. In reservoir simulation compaction is generally modeled as functions or tables of pressure versus pore volume multipliers pvm and when appropriate transmissibility multipliers tmult. Pdf this paper presents an improved procedure for generating pseudo relative permeability curves for stratified water. A schematic diagram of this process is shown in figure 1. Implementation of a two pseudocomponent approach for variable. Applied geostatistics for reservoir characterization, 2nd edition. Does not account for saturation gradients within the grid block.
This textbook is only one of the tools to teach the reservoir simulation techniques at the university and in post graduate courses efficiently. Reservoir simulation ertekinabbaszadeh ips2014 v2 ma. This paper presents a detailed investigation on the reliability of the dynamic pseudo functions used to upscale flow properties in reservoir simulation. In particular, the new formulation uses the modified blackoil mbo approach and can handle volatile oils and gas condensate reservoirs in more accurate ways than presented. Approximately all of the petroleum reservoirs are heterogeneous, and this. Then the results of coarse grid simulation with directional transmissibility weighted. Reservoir characterization for simulation, hartzog draw field, wyoming simplified oilwater relative permeability expressions accounting for hysteresis in the imbibition cycle the development of pseudo functions for three phase black oil simulators notes on stochastic shales. A pseudo function approach in reservoir simulation core. Pseudo curves can reduce runtime without loss of accuracy. It treats various boundary conditions as fictitious wells, gives algebraic equations for their flowrates and presents an elaborate treatment of radial grid for singlewell simulation to analyze well test results and to create well pseudofunctions necessary in conducting a practical reservoir simulation study.
Development of advanced reservoir simulation techniques for. The book covers all of the fundamental techniques that are unique to reservoir simulation, such as pseudo relative permeability. Psreservoir modeling for co 2 eor in mississippian carbonate reservoir at wellington field in southcentral kansas yevhen holubnyak1, willard watney2, jason rush2, mina fazelalavi2, dana wreath3, and tandis s. A third pseudo component is used to describe the water. Averaging reservoir properties within the coarse cells is usually referred to as.
It works for black oil and for compositional simulation. When successfully integrated with a reservoir simulator, the net result is a model that effectively simulates performance of. Volume 2, supp, pages 5867 a pseudo function approach in reservoir simulation zhangxin chen, guanren huan, and baoyan li abstract. Water influx models are mathematical models that simulate and predict aquifer performance. Reservoir modeling for co2 eor in mississippian carbonate. Most importantly, they predict the cumulative water influx history. Pseudo relative permeability curves are used to reduce the dimensionality of reservoir simulation models and also to account for intracell rock property variations. It treats various boundary conditions as fictitious wells, gives algebraic equations for their flowrates and presents an elaborate treatment of radial grid for singlewell simulation to analyze well test results and to create well pseudo functions necessary in conducting a practical reservoir simulation study. A theoretical study and a real field application are used to evaluate kyte and berry 1975.
Reservoir simulation symposium, houston, tx, 1114 february 2001. A theoretical study and a real field application are used to. The purpose of pseudo curves is to mimic finegrid simulations. Estimation of reservoir properties by monte carlo simulation. Pvt fluid sampling, characterization and gas condensate. Basic intermediate course objectives and description this fiveday course is designed for participants who do not have extensive prior knowledge of reservoir.
Pseudo curves are used with coarse simulation grids. A pseudo function approach in reservoir simulation citeseerx. Factors affecting pseudo relative permeability curves. From outcrop to simulation model how heterogeneity affects oil recovery. Innovative petrotech solutions, inc reservoir simulation instructors. Pseudo functions are the main methods for upscaling of relative permeability. In this paper we develop a pseudo function approach to obtain rela tive permeabilities for the numerical simulation of threedimensional petroleum reservoirs. In his work, a stratified reservoir is simulated as a single layer by the usage of pseudo relative permeability curves. Reservoir simulation has become an industry standard practice in production forecast at well level, facility level, and field level. Pseudo adjust relativepermeability curves for coarse grids. Pdf factors affecting pseudo relative permeability curves.
Although a number of methods for calculating dynamic pseudofunctions have been developed over the years, there is still a lack of understanding as to why a certain method will succeed in some cases but fail in others. From this study they can understand the reservoir production mechanism and development indices. Implementation of a two pseudocomponent approach for. A comparison of twophase dynamic upscaling methods based. Reservoir simulation tasks gather and input the rock and fluids data reservoir description choose certain numerical features of the grid number of cells, cells. Pvti is for building pvt data in the eclipse format. Classification of pseudo functions using statistical. Evaluation of dynamic pseudo functions for reservoir. A large number of grid cells are needed to simulate very large field reservoirs such as those in the middle east. More specifically, reservoir simulation allows estimation of. The problem, however, is that there are only few well data which can be used as sample data to find the relationship.
Pseudo is the eclipse pseudo package for generating coarse grid pseudo functions for lowcost sensitivity pvti convert lab data to input data. To reservoir engineers, the study of pseudo functions for the cross sectional models of difierent types itself is the study of numerical simulation sensitivity of displacement processes in. Generalized pseudopressure well treatment in reservoir simulation. In this paper, we develop new formulation for generalized multiphase pseudo pressure and pseudo time functions that can handle any type of multiphase flow system. We demonstrate our new framework on geological models from the utsira formation in the norwegian north sea, and verify large e ciency gains compared with nescale simulation. Geoquest, schlumberger eclipse 200 reference manual multisegment wells. Fast computational methods for reservoir flow models. Postgraduate course outline ptrl5004 numerical reservoir. Eos correlation is used with accurate pvt characterization to develop gas condensate reservoir models. A comparison of twophase dynamic upscaling methods based on. Pdf presentation for undergraduate students find, read and cite all the research you need on researchgate.
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