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Fractured Geothermal Reservoir Growth Induced By Heat Extraction
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Book Synopsis Fractured Geothermal Reservoir Growth Induced by Heat Extraction by :
Download or read book Fractured Geothermal Reservoir Growth Induced by Heat Extraction written by and published by . This book was released on 1986 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Field testing of a hydraulically-stimulated, hot dry rock geothermal system at the Fenton Hill site in northern New Mexico has indicated that significant reservoir growth occurred as energy was extracted. Tracer, microseismic, and geochemical measurements provided the primary quantitative evidence for documenting the increases in accessible reservoir volume and fractured rock surface area that were observed during energy extraction operations which caused substantial thermal drawdown in portions of the reservoir. These temporal increases suggest that augmentation of reservoir heat production capacity in hot dry rock systems may be possible.
Book Synopsis Fractured Geothermal Growth Induced by Heat Extraction by :
Download or read book Fractured Geothermal Growth Induced by Heat Extraction written by and published by . This book was released on 1989 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Field testing of a hydraulically stimulated, hot dry rock (HDR) geothermal system at the Fenton Hill site in northern New Mexico indicated that significant reservoir growth occurred as energy was extracted. Tracer, microseismic, and geochemical measurements provided the primary quantitative evidence for the increases in accessible reservoir volume and fractured rock surface area that were observed during energy extraction operations that caused substantial thermal drawdown in portions of the reservoir. These temporal increases suggest that augmentation of reservoir hear-production capacity in an HDR system may be possible. [DJE 2005].
Book Synopsis Analytic Element Modeling of Groundwater Flow by : H. M. Haitjema
Download or read book Analytic Element Modeling of Groundwater Flow written by H. M. Haitjema and published by Elsevier. This book was released on 1995-09-20 with total page 407 pages. Available in PDF, EPUB and Kindle. Book excerpt: Modeling has become an essential tool for the groundwater hydrologist. Where field data is limited, the analytic element method (AEM) is rapidly becoming the modeling method of choice, especially given the availability of affordable modeling software. Analytic Element Modeling of Groundwater Flow provides all the basics necessary to approach AEM successfully, including a presentation of fundamental concepts and a thorough introduction to Dupuit-Forchheimerflow. This book is unique in its emphasis on the actual use of analytic element models. Real-world examples complement material presented in the text. An educational version of the analytic element program GFLOW is included to allow the reader to reproduce the various solutions to groundwater flow problems discussed in the text. Researchers and graduate students in groundwater hydrology, geology, andengineering will find this book an indispensable resource. * * Provides a fundamental introduction to the use of the analytic element method. * Offers a step-by-step approach to groundwater flow modeling. * Includes an educational version of the GFLOW modeling software.
Book Synopsis Enhanced Heat Extraction from Hot-dry-rock Geothermal Reservoirs Due to Interacting Secondary Thermal Cracks. Final Report by :
Download or read book Enhanced Heat Extraction from Hot-dry-rock Geothermal Reservoirs Due to Interacting Secondary Thermal Cracks. Final Report written by and published by . This book was released on 1979 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: How the fluid circulating through the main hydraulic fracture and the thermally-induced secondary, growing, interacting cracks affects the time-varying temperature, deformations, stresses, thermal crack geometry, water flow rates through the main and thermal cracks, reservoir coolant outlet temperature, and reservoir thermal power of the cracked geothermal reservoir is investigated. First, a simplified version of the proposed hot-dry-rock reservoir is considered. A closed-form solution of the rock temperature without thermal crack was found and substituted into SAP-IV computer code to calculate the stresses. These stresses being superposed with earth stresses and fluid pressure were used in conjunction with the fracture mechanics criterion to determine the initiation of secondary thermal crack. After the initiation of secondary thermal crack, the rock temperature was then calculated by a two-dimensional heat conduction program AYER. The detailed procedures for carrying out these steps are listed. Solutions developed are applied to studying the time-varying temperature field, thermal stresses and crack geometry produced, and additional heat power generated in the reservoir. Conclusions were discussed and summarized. (MHR).
Book Synopsis Experimental Studies on Heat Extraction from Fractured Geothermal Reservoirs by : Paul Kruger
Download or read book Experimental Studies on Heat Extraction from Fractured Geothermal Reservoirs written by Paul Kruger and published by . This book was released on 1982 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Thermal Stress Cracking and the Enhancement of Heat Extraction from Fractured Geothermal Reservoirs by : Hugh D. Murphy
Download or read book Thermal Stress Cracking and the Enhancement of Heat Extraction from Fractured Geothermal Reservoirs written by Hugh D. Murphy and published by . This book was released on 1978 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy Research Abstracts written by and published by . This book was released on 1994 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Geothermal Energy Systems by : Ernst Huenges
Download or read book Geothermal Energy Systems written by Ernst Huenges and published by John Wiley & Sons. This book was released on 2011-08-24 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt: Geothermal Energy Systems The book encounters basic knowledge about geothermal technology for the utilization of geothermal resources. The book helps to understand the basic geology needed for the utilization of geothermal energy, shows up the practice to make access to geothermal reservoirs by drilling and the engineering of the reservoir by enhancing methods. The book describes the technology to make use of the Earth?s heat for direct use, power, and/or chill and gives boundary conditions for its economic and environmental utilization. A special focus is made on enhanced or engineered geothermal systems (EGS) which are based on concepts which bring a priori less productive reservoirs to an economic use. From the contents: Reservoir Definition Exploration Methods Drilling into Geothermal Reservoirs Enhancing Geothermal Reservoirs Geothermal Reservoir Simulation Energetic Use of EGS Reservoirs Economic Performance and Environmental Assessment Deployment of Enhanced Geothermal Systems plants and CO2-mitigation
Book Synopsis Autograph Letters Signed from Sydney Grundy to Augustin Daly by :
Download or read book Autograph Letters Signed from Sydney Grundy to Augustin Daly written by and published by . This book was released on 1888 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Hydraulic fracturing and geothermal energy by : S. Nemat-Nassar
Download or read book Hydraulic fracturing and geothermal energy written by S. Nemat-Nassar and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 519 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hydraulic fracturing has been and continues to be a major techno logical tool in oil and gas recovery, nuclear and other waste disposal, mining and particularly in-situ coal gasification, and, more recently, in geothermal heat recovery, particularly extracting heat from hot dry rock masses. The understanding of the fracture process under the ac tion of pressurized fluid at various temperatures is of fundamental scientific importance, which requires an adequate description of thermomechanical properties of subsurface rock, fluid-solid interaction effects, as well as degradation of the host rock due to temperature gradients introduced by heat extraction. Considerable progress has been made over the past several years in laboratory experiments, analytical and numerical modeling, and in-situ field studies in various aspects of hydraulic fracturing and geothermal energy extraction, by researchers in the United States and Japan and also elsewhere. However, the results have been scattered throughout the literature. Therefore, the time seemed ripe for bringing together selected researchers from the two countries, as well as observers from other countries, in order to survey the state of the art, exchange scientific information, and establish closer collaboration for further, better coordinated scientific effort in this important area of research and exploration.
Book Synopsis A Thermoelastic Hydraulic Fracture Design Tool for Geothermal Reservoir Development by :
Download or read book A Thermoelastic Hydraulic Fracture Design Tool for Geothermal Reservoir Development written by and published by . This book was released on 2003 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: Geothermal energy is recovered by circulating water through heat exchange areas within a hot rock mass. Geothermal reservoir rock masses generally consist of igneous and metamorphic rocks that have low matrix permeability. Therefore, cracks and fractures play a significant role in extraction of geothermal energy by providing the major pathways for fluid flow and heat exchange. Thus, knowledge of conditions leading to formation of fractures and fracture networks is of paramount importance. Furthermore, in the absence of natural fractures or adequate connectivity, artificial fracture are created in the reservoir using hydraulic fracturing. At times, the practice aims to create a number of parallel fractures connecting a pair of wells. Multiple fractures are preferred because of the large size necessary when using only a single fracture. Although the basic idea is rather simple, hydraulic fracturing is a complex process involving interactions of high pressure fluid injections with a stressed hot rock mass, mechanical interaction of induced fractures with existing natural fractures, and the spatial and temporal variations of in-situ stress. As a result it is necessary to develop tools that can be used to study these interactions as an integral part of a comprehensive approach to geothermal reservoir development, particularly enhanced geothermal systems. In response to this need we have set out to develop advanced thermo-mechanical models for design of artificial fractures and rock fracture research in geothermal reservoirs. These models consider the significant hydraulic and thermo-mechanical processes and their interaction with the in-situ stress state. Wellbore failure and fracture initiation is studied using a model that fully couples poro-mechanical and thermo-mechanical effects. The fracture propagation model is based on a complex variable and regular displacement discontinuity formulations. In the complex variable approach the displacement discontinuities are defined from the numerical solution of a complex hypersingular integral equation written for a given fracture configuration and loading. The fracture propagation studies include modeling interaction of induced fractures with existing discontinuities such as faults and joints. In addition to the fracture propagation studies, two- and three-dimensional heat extraction solution algorithms have been developed and used to estimate heat extraction and the variations of the reservoir stress with cooling. The numerical models have been developed in a user-friendly environment to create a tool for improving fracture design and investigating single or multiple fracture propagation in rock.
Book Synopsis Hydraulic Proppant Fracturing and Gravel Packing by : D. Mader
Download or read book Hydraulic Proppant Fracturing and Gravel Packing written by D. Mader and published by Elsevier. This book was released on 1989-03-01 with total page 1277 pages. Available in PDF, EPUB and Kindle. Book excerpt: Many aspects of hydraulic proppant fracturing have changed since its innovation in 1947. The main significance of this book is its combination of technical and economical aspects to provide an integrated overview of the various applications of proppants in hydraulic fracturing, and gravel in sand control. The monitoring of fractures and gravel packs by well-logging and seismic techniques is also included.The book's extensive coverage of the subject should be of special interest to reservoir geologists and engineers, production engineers and technologists, and well log analysts.
Book Synopsis An Experimental Study of Creation of Optimal Fracture Network for Heat Extraction from Engineered Geothermal Reservoirs by : Banambar Singh
Download or read book An Experimental Study of Creation of Optimal Fracture Network for Heat Extraction from Engineered Geothermal Reservoirs written by Banambar Singh and published by . This book was released on 2015 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt: Enhanced geothermal system has been successfully able to increase the permeability of the reservoir and hydro-fracturing is the conventional method of creating artificial fracture system. But more precise technique is required to reduce the cost of the geothermal energy extraction and this will require proper understanding of the thermo-mechanical behaviour of the reservoir rocks i.e. Granites. Current research work has focused on the thermo-mechanical properties of granites under various temperature and strain rate condition. Granites of two different areas i.e. Bundelkhand granite, India and Harcourt granite, Australia have been investigated for the research work. 4 different strain rates i.e. 0.05 mm/min, 0.5 mm/min, 5.0 mm/min and 50 mm/min at 3 different temperatures i.e. room temperature (25 °C), 200 °C and 400 °C were considered for experimental analysis. It was observed that at room temperature, with increasing strain rate the uniaxial compressive strength of the rock increases and the same trend is also observed at higher temperatures conditions. Whereas at low strain rate the compressive strength decreases with increase in temperature, while the trend is irregular at higher strain rates. Bundelkhand granites have thermal conductivity values between 3.1 to 3.6 W/m.K whereas that of Harcourt granite is 2.4 W/m.K. Sieve analysis of the fragmented particles due to UCS test suggested that there is no effect of strain rate on particle size distribution whereas higher temperatures produces more finer particles. It was observed that more than 75% of the fragmented particles are having diameter of greater than 11.3 mm. Effective size i.e. D10 was analysed and found that at room temperature (25 °C) 10% of fragmented particles are finer than 3.0 mm whereas at 200 °C and 400 °C 10% of finer particles are finer than 1.9 mm and 1.5 mm respectively. Numerical simulation results of the numerical simulation are quite analogous to the lab experimental data.
Book Synopsis Analysis of Heat Transfer and Energy Recovery in Fractured Geothermal Reservoirs by :
Download or read book Analysis of Heat Transfer and Energy Recovery in Fractured Geothermal Reservoirs written by and published by . This book was released on 1978 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Geothermal Energy by : United States. Dept. of Energy. Division of Geothermal Energy
Download or read book Geothermal Energy written by United States. Dept. of Energy. Division of Geothermal Energy and published by . This book was released on 1986 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Heat Extraction Modeling of Single-phase Sweep Flows in Fractured Geothermal Reservoirs by : Stephen Tang-Fei Lam
Download or read book Heat Extraction Modeling of Single-phase Sweep Flows in Fractured Geothermal Reservoirs written by Stephen Tang-Fei Lam and published by . This book was released on 1990 with total page 638 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Heat Extraction in Fractured Hydrothermal Reservoirs by :
Download or read book Heat Extraction in Fractured Hydrothermal Reservoirs written by and published by . This book was released on 1988 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The main objective of the Heat Extraction Project has been the development of means to estimate the thermal behavior of geothermal fluids from fractured hydrothermal resources based on production of mixed reservoir fluids from heat sweep by reinjected brine and resource fluid cooled by drawdown and infiltrating waters. Several reports and publications, listed in the concluding section of this report, resulted from the application of the SGP heat sweep model to achieve this objective. The Heat Extraction Project made major advances in the development of the 1-D Heat Sweep Model and its application in geothermal fields in several countries. Heat sweep joint studies are underway for reinjection evaluation at the Los Azufres, Los Humeros, and La Primavera fields in Mexico, for the 500 t/h reinjection test for the redevelopment program at Wairakei, New Zealand, for two hot water supply recirculation systems to be developed in the USSR, and for the phase 2 test at the Hot Dry Rock project at Fenton Hill, New Mexico. Advances were also made in the cooperative studies with CFE at Los Azufres on the evaluation of the effects of early operation of small wellhead generators on the reservoirs of potentially large geothermal fields. 9 refs., 5 figs.
