Sep 15, 2016 for the co 2 flooding the focus should be on the extension of the crosssectional area of the gas. When pressure decreases at reservoir temperature, a rich gas top leftt forms a higher percentage of liquid than a lean gas top rightt. Challenges of reserves estimate tight and unconventional. Introduction webster defines simulate as to assume the appearance of without reality. Its a valuable tool to understand the oil and gas reservoir performance under various operating strategies.
This contradicts the current gas storage model for shale reservoirs, which hypothesizes that gas is stored either. This paper presents an innovative workflow for characterization and reservoir simulation of the tight gas nikanassin group in the western canada sedimentary basin. Reservoir simulation was carried out based on a typical west australian tight gas reservoir in order to understand how well productivity is affected by each of the damage mechanisms such as. This course will cover the evaluation, completion, stimulation, along with the development of tight gas reservoirs. Practical workflow to estimate expected ultimate recovery in a fracture stimulated multlayered tight gas reservoir.
Cmg develops marketleading reservoir simulation software, which is recognized worldwide as the industry standard for advanced recovery processes. In these studies, universal intelligent systems act as robust datadriven rta andor pta tools applicable for various types of reservoirs. Holditch, john spivey, john yilin wang chapter 1 reservoir characterization stephen a. As most reservoir engineering decisions are based on reservoir simulation, a chapter is devoted to introduce the topic in lucid fashion. Geomechanics, petrophysics, production and reservoir engineering expertise for reservoir characterization is combined with a reservoir simulation approach and core analysis experiments to understand the optimum strategy for tight gas development, delivering improved well productivity and gas. Cmg software solutions reservoir simulation software. Modeling discrete irregular stratabound fracture network flow, including dynamic recharge from the matrix, author mckoy, m. Gas eor in tight unconventionals society of petroleum. Natural fractured reservoir engineering phdg textbooks in preparation, intended to be issued during 2015. Fundamentals of subsurface development planning for coalbed methane.
Description shale gas and tight oil reservoir simulation delivers the latest research and applications used to better manage and interpret simulating production from shale gas and tight oil reservoirs. Production optimization of a tight sandstone gas reservoir with well completions. Shale gas and tight oil reservoir simulation 1st edition elsevier. Reservoir simulation of shale shale and tight reservoir simulations along with complex fractures are still a new phenomenon and there is a lack of basic understanding on the numerical approaches in order to properly analyze the simulation results. This information is critical for a better understanding of the impacts of key reservoir properties and complex fractures. This course in unconventional reservoir management is aimed at all petrotechnical professionals who have little experience with these resource types but who wish to quickly learn some key elements and issues associated with the exploitation of unconventional reservoirs tight gas, tight oil, and shales. Reservoir stimulation sets forth a rationalization of stimulation using reservoir engineering concepts, and addresses topics such as formation characterization, hydraulic fracturing and matrix acidizing. Reservoir simulation is the process of making a replica of a reservoir on computers by using porous media, so as to predict the fluid flow of hydrocarbons in the reservoir. Effective and sustainable hydraulic fracturing intechopen. Shale gas and tight oil reservoir simulation 1st edition.
Various reservoir workflow diagrams presented in the book provide a clear direction to meet the challenges of the profession. However, serious limitations exist in the fundamentals of reservoir simulation when it comes to unconventional or complex reservoirs. Reservoir simulation of shale gas and tight oil reservoirs. Searched for reservoir in all fields 593 results found variables and numbers. Tight gas basics most of us are familiar with traditional tight gas reservoirs clean, low porosity sandstones or siltstones that look unattractive on log analysis, at least by the conventional wisdom of the 1960s. Apr 10, 2015 he is the winner of australian gas innovation research 2012 award for introducing a new method to enhance natural gas production from tight gas reservoirs. A number of diversion techniques are available and each of them has certain advantages, disadvantages, and limitations wei et al. Simulation study of co 2 eor in tight oil reservoirs with. Also included are new insights into the numerical modelling of co2 injection for enhanced oil recovery in tight oil reservoirs.
Shale gas and tight oil reservoir simulation delivers the latest research and applications used to better manage and interpret simulating production from shale gas and tight oil reservoirs. Tight gas reservoir development society of petroleum engineers. Reservoir modeling in shalegas reservoirs request pdf. Porosity averages from 5 to 10% with permeability between 0. Travis peak, east texas basin, texas cotton valley, east texas basin, texas frontier, green river basin, wyoming. Optimizing hydraulic fracturing treatment integrating. Introduction of shale gas and tight oil reservoirs. Gas based eor in tight unconventionals is a growing application to tap the vast unproduced oil and condensate resources in liquidrich shale basins. Our experience in tight gas research includes characterising gas storage and flow behaviour in tight gas formation rocks characterising permeability and stress relationship and anisotropic permeability reservoir simulation of tight gas production reservoir simulation of gas coproduction from tight sandstone, shale, and coal.
Type i has little matrix porosity and permeability leading to fractures dominating both storage capacity and fluid flow pathways. The rich gas drops out more condensate than the lean gas bottom leftt. In the meantime, aibased pta tools are structured for naturally fractured tight gas reservoirs developed with multilateral wells, and gas reservoir recovered using dual lateral wells. Training course and seminar catalog society of petroleum. Shale gas and tight oil reservoir simulation ebook, 2018. Accelerated compositional simulation of tight oil and shale gas. Simulation of tight fluid flow with the consideration of capillarity and stresschange effect.
Normally, a large hydraulic fracture treatment is required to produce gas economically. Sciforum preprints scilit sciprofiles mdpi books encyclopedia. Fundamentals of gas shale reservoirs wiley online books. Shale gas and tight oil reservoir simulation kindle edition by wei yu, kamy sepehrnoori. The huffnpuff process now involves several hundred wells in the eagle ford, and pilots are planned or ongoing in all. Tight gas reservoirs are generally defined as having less than 0. One important decision to make in completing a tight gas sandstone reservoir is to select a diversion method table 14. Both coal bed methane cbm and fractured tight gas reservoirs are. Yu authored or coauthored more than 150 technical papers and holds five patents and one book shale gas and tight oil reservoir simulation. Simulation, decline curve analysis, tight gas downloads 10 in the last 30 days. Mathematical model computer codes numerical model physical model figure 1. Eclipse 300 solves the reservoir flow equations for compositional hydrocarbon descriptions and thermal simulation.
If you would like to be alerted when available for purchase, click here. He is an associate editor for spe journal, journal of petroleum science and engineering, and international journal of oil, gas and coal technology. Natural gas production engineering, pennwell books. In this reservoir engineering course important concepts that will be covered include the reservoir life cycle, reservoir environment and formation properties, darcys law, and api correlations. Holditch and john yilin wang 23 articles from the spe literature covering different geological formations in u. Tight oil reservoirs subjected to fracking can be divided into four different groups. Understanding gas production mechanism and effectiveness of well stimulation in the haynesville shale through reservoir simulation. This is because there is a long period of transient flow in tight gas reservoirs that biases the fitting and results in incorrect predictions of late time performance. Crains petrophysical handbook tight gas reservoir analysis. Reservoir simulation of shale gas and tight oil reservoirs by. Embedded discrete fracture modeling and application in. Pdf tight gas reservoirs are categorized as unconventional gas reservoirs.
Tight gas reservoirs society of petroleum engineers. The petroleum evolution rules in the lower cretaceous deep tight sandstone reservoir are unclear. A reservoir simulation study of naturally fractured. Reservoir simulation process reservoir simulation is briefly. Shale gas and tight oil reservoir simulation yu, wei, sepehrnoori, kamy on. Modeling and simulation of gas flow behavior in shale. Shale and tight reservoir simulations along with complex fractures are still a new phenomenon and there is a lack of basic understanding on the numerical approaches in order to properly analyze the simulation results. Semianalytical model for shale gas and tight oil simulation.
Purchase shale gas and tight oil reservoir simulation 1st edition. Holditchs tight gas reservoirs part i unconventional gas resources. Simulation of petroleum reservoir performance refers to the construction and operation of a model whose behavior assumes the appearance of actual reservoir behavior. Starting with basic fundamentals, the book then includes real field data that will not only generate reliable reserve estimation, but also predict the effective range of reservoir and fracture properties. New fortran codes have been developed to generate fracture networks, to simulate reservoir drainagerecharge, and to plot the fracture networks and reservoir pressures. The fluids whose flow is determined using the reservoir simulation technique are majorly oil, water. Holditch part ii tight gas sands engineering by stephen a. An integrated workflow for reservoir modeling and flow.
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. Reservoir simulation is the most powerful tool for estimating reserve as well as predicting reservoir performance. Accelerated compositional simulation of tight oil and shale gas reservoirs using. To evaluate a layered, tight gas reservoir and design the well completion, the operator must use both a reservoir model and a hydraulic fracture propagation model.
Modeling gas adsorption in marcellus shale using langmuir and bet isotherms. Pdf the modeling and simulation of tight gas reservoirs. Falling between conventional and shale gas in the reservoir permeability. Special issue reservoir simulation and prediction of gas, oil and coal mine special issue editors special issue information. Flow modelling in low permeability unconventional reservoirs. Tight oil shale formations are heterogeneous and vary widely over relatively short distances. Holditch chapter 3 coalbed methane sunil ramaswamy, stephen a. One of the main characteristics of a tight gas reservoir is the. Predicting the performance of tight gas reservoirs onepetro.
Starting with basic fundamentals, the book then includes real field data that will not only generate reliable reserve estimation, but also. Tight gas unconventional gas reservoir engineering. A thesis in petroleum engineering submitted to the graduate faculty of texas tech university in partial fulfillment of the requirements for the degree of master of sciences in petroleum engineering approved. Pge 323m reservoir engineering iii simulation 17,218 views 25. Participants will also be introduced to analytical simulation. A hydraulic fracturing design and evaluation simulator was used to model the geometry and. Reservoir management for unconventional reservoirs. Tight gas reservoirs have one thing in commona vertical well drilled and completed in the tight gas reservoir must be successfully stimulated to produce at commercial gas flow rates and produce commercial gas volumes. Optimizing hydraulic fracturing treatment integrating geomechanical analysis and reservoir simulation for a fractured tight gas reservoir, tarim basin, china. Shale gas and tight oil reservoir simulation, wei yu, kamy. Presented at the spe asia pacific oil and gas conference and exhibition, brisbane, 2325 october spe192103ms. Evaluating factors controlling damage and productivity in.
We consider a cubical matrix blocks, which consists of free gas and the adsorbed gas. Download it once and read it on your kindle device, pc, phones or tablets. Starting with basic fundamentals, the book then includes real field data that will not only generate reliable reserve estimation, but also predict the. This course will provide participants with an overview of the analysis and development of tight gas reservoirs. The paper includes an example that contrasts the application of numerical reservoir simulation and advanced declinecurve analyses to illustrate. Table 1 lists the data required to run both the reservoir model and the fracture treatment design model.
Part iv case histories of tight gas reservoir development ebook supplement edited by stephen a. However, calculation of hydrocarboninplace of a gas condensate reservoir is more complex because of the change from a single gaseous phase in the reservoir to. Tight gas is natural gas produced from reservoir rocks with such low permeability that massive hydraulic fracturing is necessary to produce the well at economic rates. Shale gas and tight oil reservoir simulation knovel. A fast simulation tool for evaluation of novel well stimulation techniques for tight gas reservoirs.
Low permeability sandstones encased in shaly source rocks can be charged with gas. Shale gas, tight oil, and induced seismicity by mark d. Often, more data and more engineering manpower are required to. Here, we are presenting an updated dualmechanism dualporosity that accounts the free gas in the reservoir pores and the adsorbed gas on the surface of the kerogen. Analytical and numerical simulation studies are performed to have a qualitative understanding of damage mechanisms associated with production from nonfractured and hydraulically fractured tight gas reservoirs. By feng gui, khalil rahman, daniel moos, george vassilellis, chao li, qing liu, fuxiang zhang, jianxin peng, xuefang yuan and guoqing zou. A fast simulation tool for evaluation of novel well. A schematic diagram of this process is shown in figure 1. The pressure will build and the tight sandstones will be overpressured, but a low permeability barrier above them will contain the gas. Although the first objective of our study was to model shale gas reservoirs, however this proposed approach looks also suitable for the simulation of multiphase flow from different reservoirs types all types of low permeability reservoirs, including tight oil reservoirs.
Special issue reservoir simulation and prediction of gas. Embedded discrete fracture model edfm for complex fracture geometry. Cmgs superior technology continues to break new ground for capabilities simulating the simple to the most advanced recovery processes through a combination of easytouse model building workflows, stateoftheart performance enhancement. Many more details can be found in the referenced papers and books. If you continue browsing the site, you agree to the use of cookies on this website. Shale gas and tight oil reservoir simulation sciencedirect. This simulation technique is one of the fields of reservoir engineering. Trace the history of technological discoveries allowing the industry to produce tight gas reservoirs in stephen a. Starting with basic fundamentals, the book then includes real field data that will not only generate reliable reserve estimation, but also predict the effective range of reservoir and. Numerical model for shale gas and tight oil simulation. In shale gas reservoirs, the gas desorption phenomenon exists so we included the gas desorption in the model using langmuir isotherm as summarized in table 3 1819 20.
Simulation of petroleum reservoir performance refers to the construction and operation of a model whose behavior assumes the appearance of actual reservoir. Reservoir fluid characterisation supplementary scripts used at the montanuniversitat up to the retirement. Because a typical tight gas reservoir is a layered formation, it is necessary to determine values of reservoir properties, such as permeability, net pay, porosity, and water saturation on a layerbylayer basis. Schlumberger eclipse suite e100, e300, eadvanced eclipse is an oil and gas reservoir simulator originally developed by ecl exploration consultants limited and currently owned, developed, marketed and maintained by sis formerly known as geoquest, a division of schlumberger. Formation damage, which refers to a loss in reservoir productivity, is also examined comprehensively. Gas reservoirs lend themselves to easy calculation of the hydrocarboninplace through a general gas law equation. Use features like bookmarks, note taking and highlighting while reading shale gas and tight oil reservoir simulation. Production optimization of a tight sandstone gas reservoir. The liquid dropout curve assumes the two phases remain in contact with one another. In shale gas reservoirs, the gas will be stored in the form of free gas and the adsorbed gas.
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