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A Semi Analytical Approach To Geothermal Reservoir Performance Prediction
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Book Synopsis A Semi-Analytical Approach to Geothermal Reservoir Performance Prediction by :
Download or read book A Semi-Analytical Approach to Geothermal Reservoir Performance Prediction written by and published by . This book was released on 1976 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper presents a simplified analytic treatment of the problem of fluid flow and heat transfer in a hot water reservoir. A multi-layered reservoir is considered, with a circular array of producing wells surrounded by a concentric, circular array of injection wells. Complete injection of produced water, and hence an eventual steady state, is assumed for the flow system. A temperature gradient is assumed in the radial direction. The rock properties are allowed to vary from layer to layer, but are considered uniform within a particular layer. The heat transfer problem is handled by a modification of the solution to the problem of heat extraction from fractured dry rocks proposed by Gringarten, et al. (1975). The reservoir is represented as a vertical stack of horizontal layers, with permeable and impermeable layers alternating. The pressure distributions in various layers are calculated by spatial superposition of the continuous line source solution for the given geometry, with average fluid and rock properties within the system. This approach can yield results such as the breakthrough time of injected water in each layer, pressure distribution in space and time and the temperature of the produced water over time. In a study of the Heber geothermal reservoir in the Imperial Valley of California such results have shown reasonably close agreement with the results from computer simulation. Many hot water geothermal reservoirs display a closed temperature anomaly, i.e., the temperature of the reservoir is highest near the center and gradually declines towards the periphery. For such reservoirs a logical development plan is to produce hot water from the central part of the reservoir through an array or cluster of production wells. The heat is extracted from the produced water for power generation, and the cooled water is injected into the cooler marginal areas of the reservoir through an array of injection wells. This paper presents a semi-analytic method for analyzing the heat and fluid flow characteristics of such a system. 3 figs.
Book Synopsis A Semi-analytical Model to Calculate Energy Production in Single Fracture Geothermal Reservoirs by : G. M. Shook
Download or read book A Semi-analytical Model to Calculate Energy Production in Single Fracture Geothermal Reservoirs written by G. M. Shook and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The ultimate goal of geothermal reservoir management is to mine as much energy as possible from the reservoir. Since most of geothermal reservoirs are fractured, the development of improved techniques for monitoring, prediction and control of two-phase mass and energy transport in the fractures are needed. Tracer testing is a powerful tool for characterizing fractures properties such as swept pore volume. By incorporating the pore volume of the fracture estimated from tracer data with a semi-anaytical model of mass and energy transport in the fracture and matrix, the energy production rate can be calculated. Previous models to predict energey production assumed single-phase flow and semi-infinite matrix blocks and thus overestimate the energy that can be usufully produced from the reservoir. In this paper, a semi-analytical solution to the mass and energy balance equations is derived for two-phase flow in a fracture with heat conduction from a finite matrix. Calculations using the semi-analytical model are shown to be in good agreement with numerical simulations using the TETRAD simulator.
Book Synopsis Reservoir Modeling and Prediction at Pleasant Bayou Geopressured-Geothermal Reservoir by :
Download or read book Reservoir Modeling and Prediction at Pleasant Bayou Geopressured-Geothermal Reservoir written by and published by . This book was released on 1992 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Modeling and prediction of geopressured-geothermal reservoirs is an excellent example of an engineering problem that can be solved through many different means. The problem may be approached from a purely numerical viewpoint, where a successful history match ''demonstrates'' the validity of the reservoir model, or from an analytical point of view. Each method has its own inherent limitations and weaknesses. Such limitations can be minimized by using some combination of both numerical and analytical methods, taking advantage of the strengths of each without the attendant weaknesses. This paper describes a combined numerical/analytical approach to reservoir engineering at the Pleasant Bayou geopressured-geothermal reservoir. A reservoir description had previously been developed, through which a successful history match was performed. Certain details of the reservoir can also be obtained through analysis of pressure and flow transients; these can then be used to constrain the numerical model. Methods for extracting such reservoir data are discussed, and the manner in which they can be used as constraints in the numerical models are presented.
Book Synopsis A Semi-analytical Model for Heat and Mass Transfer in Geothermal Reservoirs to Estimate Fracture Surface-are-to-volume Ratios and Thermal Breakthrough Using Thermally-decaying and Diffusing Tracers by :
Download or read book A Semi-analytical Model for Heat and Mass Transfer in Geothermal Reservoirs to Estimate Fracture Surface-are-to-volume Ratios and Thermal Breakthrough Using Thermally-decaying and Diffusing Tracers written by and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A semi-analytical model was developed to conduct rapid scoping calculations of responses of thermally degrading and diffusing tracers in multi-well tracer tests in enhanced geothermal systems (EGS). The model is based on an existing Laplace transform inversion model for solute transport in dual-porosity media. The heat- and mass-transfer calculations are decoupled and conducted sequentially, taking advantage of the fact that heat transfer between fractures and the rock matrix is much more rapid than mass transfer and therefore mass transfer will effectively occur in a locally isothermal system (although the system will be nonisothermal along fracture flow pathways, which is accounted for by discretizing the flow pathways into multiple segments that have different temperature histories). The model takes advantage of the analogies between heat and mass transfer, solving the same governing equations with k{sub m}/(?C{sub p}){sub w} being substituted for?D{sub m} in the equation for fracture transport and k{sub m}/(?C{sub p}){sub m} being subsituted for D{sub m} in the equation for matrix transport; where k = thermal conductivity (cal/cm-s-K),? = density (g/cm3), C{sub p} = heat capacity (at constant pressure) (cal/g-K),? = matrix porosity, and D = tracer diffusion coefficient (cm2/s), with the subscripts w and m referring to water and matrix, respectively. A significant advantage of the model is that it executes in a fraction of second on a single-CPU personal computer, making it very amenable for parameter estimation algorithms that involve repeated runs to find global minima. The combined thermal-mass transport model was used to evaluate the ability to estimate when thermal breakthrough would occur in a multi-well EGS configuration using thermally degrading tracers. Calculations were conducted to evaluate the range of values of Arrhenius parameters, A and E{sub {alpha}} (pre-exponential factor, 1/s, and activation energy, cal/mol) required to obtain interpretable responses of thermally-degrading tracers that decay according to the rate constant k{sub d} = Ae{sup -E{sub {alpha}}/RT}, where k{sub d} = decay rate constant (1/s), R = ideal gas constant (1.987 cal/mol-K), and T = absolute temperature (K). It is shown that there are relatively narrow ranges of A and E{sub {alpha}} that will result in readily interpretable tracer responses for any given combination of ambient reservoir temperature and working fluid residence time in a reservoir. The combined model was also used to simulate the responses of conservative tracers with different diffusion coefficients as a way of estimating fracture surface-area-to-volume ratios (SA/V) in multi-well EGS systems. This method takes advantage of the fact that the differences in breakthrough curves of tracers with different matrix diffusion coefficients are a function of SA/V. The model accounts for differences in diffusion coefficients as a function of temperature so that tracer responses obtained at different times can be used to obtain consistent estimates of SA/V as the reservoir cools down. Some single-well applications of this approach are simulated with a numerical model to demonstrate the potential to evaluate the effectiveness of EGS stimulations before a second well is drilled.
Download or read book Geothermal Energy Update written by and published by . This book was released on 1978 with total page 750 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Bibliography on Heat and Mass Transfer in Porous Media by : Christoph Clauser
Download or read book Bibliography on Heat and Mass Transfer in Porous Media written by Christoph Clauser and published by . This book was released on 1987 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Analysis of Layered Gas Reservoir Performance Using a Semi-analytical Solution for Rate and Pressure Behavior by : I. Nengah Suabdi
Download or read book Analysis of Layered Gas Reservoir Performance Using a Semi-analytical Solution for Rate and Pressure Behavior written by I. Nengah Suabdi and published by . This book was released on 2001 with total page 630 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Petroleum Abstracts written by and published by . This book was released on 1993 with total page 1752 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Unconventional Reservoir Rate-Transient Analysis by : Christopher R. Clarkson
Download or read book Unconventional Reservoir Rate-Transient Analysis written by Christopher R. Clarkson and published by Gulf Professional Publishing. This book was released on 2021-06-15 with total page 1144 pages. Available in PDF, EPUB and Kindle. Book excerpt: Unconventional Reservoir Rate-Transient Analysis provides petroleum engineers and geoscientists with the first comprehensive review of rate-transient analysis (RTA) methods as applied to unconventional reservoirs. Volume One—Fundamentals, Analysis Methods, and Workflow is comprised of five chapters which address key concepts and analysis methods used in RTA. This volume overviews the fundamentals of RTA, as applied to low-permeability oil and gas reservoirs exhibiting simple reservoir and fluid characteristics.Volume Two—Application to Complex Reservoirs, Exploration and Development is comprised of four chapters that demonstrate how RTA can be applied to coalbed methane reservoirs, shale gas reservoirs, and low-permeability/shale reservoirs exhibiting complex behavior such as multiphase flow. Use of RTA to assist exploration and development programs in unconventional reservoirs is also demonstrated. This book will serve as a critical guide for students, academics, and industry professionals interested in applying RTA methods to unconventional reservoirs. - Gain a comprehensive review of key concepts and analysis methods used in modern rate-transient analysis (RTA) as applied to low-permeability ("tight") oil and gas reservoirs - Improve your RTA methods by providing reservoir/hydraulic fracture properties and hydrocarbon-in-place estimates for unconventional gas and light oil reservoirs exhibiting complex reservoir behaviors - Understand the provision of a workflow for confident application of RTA to unconventional reservoirs
Book Synopsis Tractationum philosophicarum tomus unus, in quo continentur 1. Philippi Mocenici universalium institutionum ad hominum perfectionem ... contemplationes 5. 2. Andreae Caesalpini quaestionum peripateticarum libri 5. 3. Bernardini Telesii by :
Download or read book Tractationum philosophicarum tomus unus, in quo continentur 1. Philippi Mocenici universalium institutionum ad hominum perfectionem ... contemplationes 5. 2. Andreae Caesalpini quaestionum peripateticarum libri 5. 3. Bernardini Telesii written by and published by . This book was released on 1588 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Geothermal Reservoir Engineering by : Malcomm Grant
Download or read book Geothermal Reservoir Engineering written by Malcomm Grant and published by Elsevier. This book was released on 2013-02-07 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt: Geothermal Reservoir Engineering offers a comprehensive account of geothermal reservoir engineering and a guide to the state-of-the-art technology, with emphasis on practicality. Topics covered include well completion and warm-up, flow testing, and field monitoring and management. A case study of a geothermal well in New Zealand is also presented. Comprised of 10 chapters, this book opens with an overview of geothermal reservoirs and the development of geothermal reservoir engineering as a discipline. The following chapters focus on conceptual models of geothermal fields; simple models that illustrate some of the processes taking place in geothermal reservoirs under exploitation; measurements in a well from spudding-in up to first discharge; and flow measurement. The next chapter provides a case history of one well in the Broadlands Geothermal Field in New Zealand, with particular reference to its drilling, measurement, discharge, and data analysis/interpretation. The changes that have occurred in exploited geothermal fields are also reviewed. The final chapter considers three major problems of geothermal reservoir engineering: rapid entry of external cooler water, or return of reinjected water, in fractured reservoirs; the effects of exploitation on natural discharges; and subsidence. This monograph serves as both a text for students and a manual for working professionals in the field of geothermal reservoir engineering. It will also be of interest to engineers and scientists of other disciplines.
Book Synopsis Mechanics of Hydraulic Fracturing by : Xi Zhang
Download or read book Mechanics of Hydraulic Fracturing written by Xi Zhang and published by John Wiley & Sons. This book was released on 2022-12-15 with total page 291 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mechanics of Hydraulic Fracturing Comprehensive single-volume reference work providing an overview of experimental results and predictive methods for hydraulic fracture growth in rocks Mechanics of Hydraulic Fracturing: Experiment, Model, and Monitoring provides a summary of the research in mechanics of hydraulic fractures during the past two decades, plus new research trends to look for in the future. The book covers the contributions from theory, modeling, and experimentation, including the application of models to reservoir stimulation, mining preconditioning, and the formation of geological structures. The four expert editors emphasize the variety of diverse methods and tools in hydraulic fracturing and help the reader understand hydraulic fracture mechanics in complex geological situations. To aid in reader comprehension, practical examples of new approaches and methods are presented throughout the book. Key topics covered in the book include: Prediction of fracture shapes, sizes, and distributions in sedimentary basins, plus their importance in petroleum industry Real-time monitoring methods, such as micro-seismicity and trace tracking How to uncover geometries of fractures like dikes and veins Fracture growth of individual foundations and its applications Researchers and professionals working in the field of fluid-driven fracture growth will find immense value in this comprehensive reference on hydraulic fracturing mechanics.
Book Synopsis Proceedings of the 17th New Zealand Geothermal Workshop 1995 by : M. P. Hochstein
Download or read book Proceedings of the 17th New Zealand Geothermal Workshop 1995 written by M. P. Hochstein and published by . This book was released on 1995 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fundamentals of Applied Reservoir Engineering by : Richard Wheaton
Download or read book Fundamentals of Applied Reservoir Engineering written by Richard Wheaton and published by Gulf Professional Publishing. This book was released on 2016-04-20 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fundamentals of Applied Reservoir Engineering introduces early career reservoir engineers and those in other oil and gas disciplines to the fundamentals of reservoir engineering. Given that modern reservoir engineering is largely centered on numerical computer simulation and that reservoir engineers in the industry will likely spend much of their professional career building and running such simulators, the book aims to encourage the use of simulated models in an appropriate way and exercising good engineering judgment to start the process for any field by using all available methods, both modern simulators and simple numerical models, to gain an understanding of the basic 'dynamics' of the reservoir –namely what are the major factors that will determine its performance. With the valuable addition of questions and exercises, including online spreadsheets to utilize day-to-day application and bring together the basics of reservoir engineering, coupled with petroleum economics and appraisal and development optimization, Fundamentals of Applied Reservoir Engineering will be an invaluable reference to the industry professional who wishes to understand how reservoirs fundamentally work and to how a reservoir engineer starts the performance process. - Covers reservoir appraisal, economics, development planning, and optimization to assist reservoir engineers in their decision-making. - Provides appendices on enhanced oil recovery, gas well testing, basic fluid thermodynamics, and mathematical operators to enhance comprehension of the book's main topics. - Offers online spreadsheets covering well test analysis, material balance, field aggregation and economic indicators to help today's engineer apply reservoir concepts to practical field data applications. - Includes coverage on unconventional resources and heavy oil making it relevant for today's worldwide reservoir activity.
Book Synopsis Modeling, Design, and Life Performance Prediction for Energy Production from Geothermal Reservoirs. Final Report by :
Download or read book Modeling, Design, and Life Performance Prediction for Energy Production from Geothermal Reservoirs. Final Report written by and published by . This book was released on 1998 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: System modeling supports the design and long-term, commercially successful operation of geothermal reservoirs. Modeling guides in the placement of the injection and production wells, in the stimulation of the reservoir, and in the operational strategies used to ensure continuing production. Without an understanding of the reservoir, it is possible to harm the reservoir by inappropriate operation (especially break-through of cold injection fluid) and the desired profitable lifetimes will not be reached. In this project the authors have continued to develop models for predicting the life of geothermal reservoirs. One of the goals has been to maintain and transfer existing Hot Dry Rock two-dimensional fractured reservoir analysis capability to the geothermal industry and to begin the extension of the analysis concepts to three dimensions. Primary focus has been on interaction with industry, maintenance of Geocrack2D, and development of the Geocrack3D model. It is important to emphasize that the modeling is complementary to current industry modeling, in that they focus on flow in fractured rock and on the coupled effect of thermal cooling. In the following sections the authors document activities as part of this research project: industry interaction; national and international collaboration; and model development.
Download or read book Energy Research Abstracts written by and published by . This book was released on 1989 with total page 1332 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Modeling, Design, and Life Performance Prediction for Energy Production from Geothermal Reservoirs. First Quarter Progress Report by :
Download or read book Modeling, Design, and Life Performance Prediction for Energy Production from Geothermal Reservoirs. First Quarter Progress Report written by and published by . This book was released on 1997 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this project is to both transfer existing Hot Dry Rock two-dimensional fractured reservoir analysis capability to the geothermal industry and to extend the analysis concepts to three dimensions. In this quarter, the primary focus has been on interaction with industry, development of the Geocrack3D model, and maintenance of Geocrack2D. It is important to emphasize that the modeling is complementary to current industry modeling, in that they focus on flow in fractured rock and on the coupled effect of thermal cooling, while a primary focus of current modeling technology is multi-phase flow.
