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Author: Dean Clark
Publisher:
ISBN:
Category :
Languages : en
Pages : 72
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Author: Dean Clark
Publisher:
ISBN:
Category :
Languages : en
Pages : 72
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Book Description
Author: Geophysical Society of Tulsa. Symposium
Publisher:
ISBN:
Category : Borehole mining
Languages : en
Pages : 126
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Author: W. Scott Keys
Publisher: Routledge
ISBN: 1351469665
Category : Science
Languages : en
Pages : 194
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Book Description
Borehole geophysics is frequently applied in hydrogeological environmental investigations where, for example, sites must be evaluated to determine the distribution of contaminants. It is a cost-effective method for obtaining information during several phases of such investigations. Written by one of world's leading experts in the field, A Practical Guide to Borehole Geophysics in Environmental Investigations explains the basic principles of the many tools and techniques used in borehole logging projects. Applications are presented in terms of broad project objectives, providing a hands-on guide to geophysical logging programs, including specific examples of how to obtain and interpret data that meet particular hydrogeologic objectives.
Author:
Publisher:
ISBN:
Category : Aquifers
Languages : en
Pages : 19
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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.
Author: W. S. Keys
Publisher:
ISBN:
Category : Borings
Languages : en
Pages : 172
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Author: Ticie A. Taylor
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 72
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Author: J. Labo
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 348
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Author:
Publisher:
ISBN:
Category : Earth resistance (Geophysics)
Languages : en
Pages : 308
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Book Description
Author: Wayne R. Saunders
Publisher: ASTM International
ISBN: 0803114036
Category : Building
Languages : en
Pages : 115
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