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Using Borehole Geophysics And Cross Borehole Flow Testing To Define Hydraulic Connections Between Fracture Zones In Bedrock Aquifers
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Book Synopsis Using Borehole Geophysics and Cross-borehole Flow Testing to Define Hydraulic Connections Between Fracture Zones in Bedrock Aquifers by :
Download or read book Using Borehole Geophysics and Cross-borehole Flow Testing to Define Hydraulic Connections Between Fracture Zones in Bedrock Aquifers written by and published by . This book was released on 1993 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nearly a decade of intensive geophysical logging at fractured rock hydrology research sites indicates that geophysical logs can be used to identify and characterize fractures intersecting boreholes. However, borehole-to-borehole flow tests indicate that only a few of the apparently open fractures found to intersect boreholes conduct flow under test conditions. This paper presents a systematic approach to fracture characterization designed to define the distribution of fractures along boreholes, relate the measured fracture distribution to structure and lithology of the rock mass, and define the nature of fracture flow paths across borehole arrays. Conventional electrical resistivity, gamma, and caliper logs are used to define lithology and large-scale structure. Borehole wall image logs obtained with the borehole televiewer are used to give the depth, orientation, and relative size of fractures in situ. High-resolution flowmeter measurements are used to identify fractures conducting flow in the rock mass adjacent to the boreholes. Changes in the flow field over time are used to characterize the hydraulic properties of fracture intersections between boreholes. Application of this approach to an array of 13 boreholes at the Mirror Lake, New Hamsphire site demonstrates that the transient flow analysis can be used to distinguish between fractures communicating with each other between observation boreholes, and those that are hydraulically isolated from each other in the surrounding rock mass. The Mirror Lake results also demonstrate that the method is sensitive to the effects of boreholes on the hydraulic properties of the fractured-rock aquifer. Experiments conducted before and after the drilling of additional boreholes in the array and before and after installation of packers in existing boreholes demonstrate that the presence of new boreholes or the inflation of packers in existing boreholes has a large effect on the measured hydraulic properties of the rock mass surrounding the borehole array.
Book Synopsis Analysis of the Results of Hydraulic-fracture Stimulation of Two Crystalline Bedrock Boreholes, Grand Portage, Minnesota by : F. L. Paillet
Download or read book Analysis of the Results of Hydraulic-fracture Stimulation of Two Crystalline Bedrock Boreholes, Grand Portage, Minnesota written by F. L. Paillet and published by . This book was released on 1994 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Application of Borehole Geophysics in the Characterization of Flow in Fractured Rocks by : F. L. Paillet
Download or read book Application of Borehole Geophysics in the Characterization of Flow in Fractured Rocks written by F. L. Paillet and published by . This book was released on 1994 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Water-resources Investigations Report by :
Download or read book Water-resources Investigations Report written by and published by . This book was released on 2001 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis U.S. Geological Survey Toxic Substances Hydrology Program by : U.S. Geological Survey Toxic Substances Hydrology Program. Technical Meeting
Download or read book U.S. Geological Survey Toxic Substances Hydrology Program written by U.S. Geological Survey Toxic Substances Hydrology Program. Technical Meeting and published by . This book was released on 1996 with total page 642 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Conceptual Models of Flow and Transport in the Fractured Vadose Zone by : National Research Council
Download or read book Conceptual Models of Flow and Transport in the Fractured Vadose Zone written by National Research Council and published by National Academies Press. This book was released on 2001-05-21 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fluid flow and solute transport within the vadose zone, the unsaturated zone between the land surface and the water table, can be the cause of expanded plumes arising from localized contaminant sources. An understanding of vadose zone processes is, therefore, an essential prerequisite for cost-effective contaminant remediation efforts. In addition, because such features are potential avenues for rapid transport of chemicals from contamination sources to the water table, the presence of fractures and other channel-like openings in the vadose zone poses a particularly significant problem, Conceptual Models of Flow and Transport in the Fractured Vadose Zone is based on the work of a panel established under the auspices of the U.S. National Committee for Rock Mechanics. It emphasizes the importance of conceptual models and goes on to review the conceptual model development, testing, and refinement processes. The book examines fluid flow and transport mechanisms, noting the difficulty of modeling solute transport, and identifies geochemical and environmental tracer data as important components of the modeling process. Finally, the book recommends several areas for continued research.
Book Synopsis Rock Fractures and Fluid Flow by : National Research Council
Download or read book Rock Fractures and Fluid Flow written by National Research Council and published by National Academies Press. This book was released on 1996-08-27 with total page 568 pages. Available in PDF, EPUB and Kindle. Book excerpt: Scientific understanding of fluid flow in rock fracturesâ€"a process underlying contemporary earth science problems from the search for petroleum to the controversy over nuclear waste storageâ€"has grown significantly in the past 20 years. This volume presents a comprehensive report on the state of the field, with an interdisciplinary viewpoint, case studies of fracture sites, illustrations, conclusions, and research recommendations. The book addresses these questions: How can fractures that are significant hydraulic conductors be identified, located, and characterized? How do flow and transport occur in fracture systems? How can changes in fracture systems be predicted and controlled? Among other topics, the committee provides a geomechanical understanding of fracture formation, reviews methods for detecting subsurface fractures, and looks at the use of hydraulic and tracer tests to investigate fluid flow. The volume examines the state of conceptual and mathematical modeling, and it provides a useful framework for understanding the complexity of fracture changes that occur during fluid pumping and other engineering practices. With a practical and multidisciplinary outlook, this volume will be welcomed by geologists, petroleum geologists, geoengineers, geophysicists, hydrologists, researchers, educators and students in these fields, and public officials involved in geological projects.
Book Synopsis Groundwater in Fractured Bedrock Environments: Managing Catchment and Subsurface Resources by : U. Ofterdinger
Download or read book Groundwater in Fractured Bedrock Environments: Managing Catchment and Subsurface Resources written by U. Ofterdinger and published by Geological Society of London. This book was released on 2019-07-19 with total page 249 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fractured bedrock aquifers have traditionally been regarded as low-productivity aquifers, with only limited relevance to regional groundwater resources. It is now being increasingly recognised that these complex bedrock aquifers can play an important role in catchment management and subsurface energy systems. At shallow to intermediate depth, fractured bedrock aquifers help to sustain surface water baseflows and groundwater dependent ecosystems, provide local groundwater supplies and impact on contaminant transfers on a catchment scale. At greater depths, understanding the properties and groundwater flow regimes of these complex aquifers can be crucial for the successful installation of subsurface energy and storage systems, such as deep geothermal or Aquifer Thermal Energy Storage systems and natural gas or CO2 storage facilities as well as the exploration of natural resources such as conventional/unconventional oil and gas. In many scenarios, a robust understanding of fractured bedrock aquifers is required to assess the nature and extent of connectivity between such engineered subsurface systems at depth and overlying receptors in the shallow subsurface.
Book Synopsis U.S. Geological Survey Open-file Report by :
Download or read book U.S. Geological Survey Open-file Report written by and published by . This book was released on 1996 with total page 622 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Rock Fractures and Fluid Flow by : National Research Council
Download or read book Rock Fractures and Fluid Flow written by National Research Council and published by National Academies Press. This book was released on 1996-08-27 with total page 568 pages. Available in PDF, EPUB and Kindle. Book excerpt: Scientific understanding of fluid flow in rock fracturesâ€"a process underlying contemporary earth science problems from the search for petroleum to the controversy over nuclear waste storageâ€"has grown significantly in the past 20 years. This volume presents a comprehensive report on the state of the field, with an interdisciplinary viewpoint, case studies of fracture sites, illustrations, conclusions, and research recommendations. The book addresses these questions: How can fractures that are significant hydraulic conductors be identified, located, and characterized? How do flow and transport occur in fracture systems? How can changes in fracture systems be predicted and controlled? Among other topics, the committee provides a geomechanical understanding of fracture formation, reviews methods for detecting subsurface fractures, and looks at the use of hydraulic and tracer tests to investigate fluid flow. The volume examines the state of conceptual and mathematical modeling, and it provides a useful framework for understanding the complexity of fracture changes that occur during fluid pumping and other engineering practices. With a practical and multidisciplinary outlook, this volume will be welcomed by geologists, petroleum geologists, geoengineers, geophysicists, hydrologists, researchers, educators and students in these fields, and public officials involved in geological projects.
Book Synopsis Calibration and Reliability in Groundwater Modelling by : Fritz Stauffer
Download or read book Calibration and Reliability in Groundwater Modelling written by Fritz Stauffer and published by . This book was released on 2000 with total page 540 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Proceedings of the Symposium on the Application of Geophysics to Engineering and Environmental Problems by :
Download or read book Proceedings of the Symposium on the Application of Geophysics to Engineering and Environmental Problems written by and published by . This book was released on 1997 with total page 576 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Use of Advanced Borehole Geophysical Techniques to Delineate Fractured-rock Ground-water Flow and Fractures Along Water-tunnel Facilities in Northern Queens County, New York by :
Download or read book Use of Advanced Borehole Geophysical Techniques to Delineate Fractured-rock Ground-water Flow and Fractures Along Water-tunnel Facilities in Northern Queens County, New York written by and published by . This book was released on 2001 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Comparison of Approaches to Characterize Flow Conditions in Bedrock Wells by : Stephanie Phillips
Download or read book Comparison of Approaches to Characterize Flow Conditions in Bedrock Wells written by Stephanie Phillips and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Evaluating vertical flow in bedrock wells is important for understanding aquifer hydraulic parameters, and borehole flowmeter methods are critical for analyzing flow in fractured-rock aquifers. Single borehole logging is used to identify active hydraulic zones under ambient and pumping conditions, and crosshole flowmeter logging is used to identify hydraulic connections between boreholes. To identify potential zones of interest for flowmeter logging in fractured rock, first a series of conventional borehole logs are collected. Then, locations for flowmeter logging are selected and data are collected under ambient and stressed conditions to distinguish fracture flow zones. Because flowmeters are limited by their resolution and operational range, tool selection is critical and should be matched to site conditions and project goals. In this study, data were collected in three boreholes in a fractured rock setting in Storrs, Connecticut, to compare three flow logging methods. Prior to flow logging, acoustic- and optical-televiewer, fluid temperature, and conductivity logs were collected in the wells. Flow measurement data were collected under ambient and pumping conditions using spinner, heat-pulse, and electromagnetic flowmeters. Factors for comparing the flow data include the spatial resolution of flow zones, maximum and minimal flow detection rates, and rapidity and ease of data collection and analysis. Fracture transmissivity results of the flow logs were also compared to results from a dissolved oxygen alteration method and a newly designed packer method.
Book Synopsis Geohydrology and Water Quality of the Durham Center Area, Durham, Connecticut by : Jennifer A. VanLoon
Download or read book Geohydrology and Water Quality of the Durham Center Area, Durham, Connecticut written by Jennifer A. VanLoon and published by . This book was released on 1995 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Journal of Environmental & Engineering Geophysics by :
Download or read book Journal of Environmental & Engineering Geophysics written by and published by . This book was released on 1996 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Theory, Modeling, and Field Investigation in Hydrogeology by : S. P. Neuman
Download or read book Theory, Modeling, and Field Investigation in Hydrogeology written by S. P. Neuman and published by Geological Society of America. This book was released on 2000-01-01 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt: The refereed and edited proceedings of the symposium Schlomo P. Neuman: Recent Advances After 30 Years of Exceptional Contributions to Well Hydraulics, Numerical Modeling, and Field Investigations, which was held in Tucson, Arizona, in October 1998. Among the topics are four decades of inverse problems in hydrogeology, a connected-network paradigm for the alluvial aquifer system, the influence of multi-scale structure in non-ergodic solute transport in heterogeneous porous media, the Gaussian analysis of one-dimensional unsaturated flow in randomly heterogeneous soils, and the type-curve interpretation of transient single-hole pneumatic injection tests in unsaturated fractured tuffs at the Apache Leap Research Site. Annotation copyrighted by Book News Inc., Portland, OR
