Fracturing In Deep Boreholes
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Fracturing In Deep Boreholes
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Author : Georg Maximilian Stockinger
language : en
Publisher:
Release Date : 2022
Fracturing In Deep Boreholes written by Georg Maximilian Stockinger and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022 with categories.
The development of the base-load capable, climate-friendly, and practically inexhaustible source of "geothermal energy" represents an important pillar of the energy supply of the future. If it were possible to expand geothermal energy production accordingly, Germany could generate 100% of its energy in a climate-neutral manner by 2050. The joint research project "Dolomitkluft," funded by the German Federal Ministry for Economic Affairs and Energy from 2016 to 2018, aims to establish a new and improved reservoir model for the Upper Jurassic carbonates of the Northern Alpine Foreland Basin for deep geothermal energy. Emerged from this project, the dissertation by Mr. Stockinger geomechanically and numerically characterizes the deep geothermal reservoir in carbonate rocks-limestones and dolomites-of the Upper Jurassic in the Northern Alpine Foreland Basin in over 4000 m depth. This book specifically addresses fracture initiation, propagation, and hydraulic conductivity around a borehole and their controlling factors such as the in situ stress, the existing discontinuity network, and the geomechanical rock properties. Mr. Stockinger has thus successfully addressed the most important aspects for the retrievability of deep geothermal energy at its point of origin-namely the (deep) borehole.
Fracturing In Deep Boreholes
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Author : Georg Maximilian Stockinger
language : en
Publisher: Springer Nature
Release Date : 2022-02-17
Fracturing In Deep Boreholes written by Georg Maximilian Stockinger and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-02-17 with Science categories.
The development of the base-load capable, climate-friendly, and practically inexhaustible source of "geothermal energy" represents an important pillar of the energy supply of the future. If it were possible to expand geothermal energy production accordingly, Germany could generate 100% of its energy in a climate-neutral manner by 2050. The joint research project "Dolomitkluft," funded by the German Federal Ministry for Economic Affairs and Energy from 2016 to 2018, aims to establish a new and improved reservoir model for the Upper Jurassic carbonates of the Northern Alpine Foreland Basin for deep geothermal energy. Emerged from this project, the dissertation by Mr. Stockinger geomechanically and numerically characterizes the deep geothermal reservoir in carbonate rocks—limestones and dolomites—of the Upper Jurassic in the Northern Alpine Foreland Basin in over 4000 m depth. This book specifically addresses fracture initiation, propagation, and hydraulic conductivity around a borehole and their controlling factors such as the in situ stress, the existing discontinuity network, and the geomechanical rock properties. Mr. Stockinger has thus successfully addressed the most important aspects for the retrievability of deep geothermal energy at its point of origin—namely the (deep) borehole.
Hydraulic Fracturing And Overcoring Stress Measurements In A Deep Borehole At The Stripa Test Mine Sweden
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Author :
language : en
Publisher:
Release Date : 1981
Hydraulic Fracturing And Overcoring Stress Measurements In A Deep Borehole At The Stripa Test Mine Sweden written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1981 with categories.
Recently, a workable method was developed for performing overcoring measurements in holes hundreds of meters in length. With the need to obtain in situ stress values for nuclear waste disposal simulation experiments at the Stripa Mine in central Sweden, the task of running both the Power Board's Leeman triaxial cell and hydraulic fracturing in the same hole was undertaken. This paper is a report of the results of the comparative measurements. 9 figures, 1 table.
Entwurf Eines Gesetzes Betreffend Die Haltung Der Zuchtstiere Nebst Begruendung Landesausschuss 25 Session 1898 U 1899
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Author :
language : en
Publisher:
Release Date : 1899*
Entwurf Eines Gesetzes Betreffend Die Haltung Der Zuchtstiere Nebst Begruendung Landesausschuss 25 Session 1898 U 1899 written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1899* with categories.
Application Of Borehole Geophysics In The Characterization Of Flow In Fractured Rocks
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Author : F. L. Paillet
language : en
Publisher:
Release Date : 1994
Application Of Borehole Geophysics In The Characterization Of Flow In Fractured Rocks written by F. L. Paillet and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with Aquifers categories.
Intermediate Scale Hydraulic Fracturing In A Deep Mine Kismet Project Summary 2016
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Author :
language : en
Publisher:
Release Date : 2016
Intermediate Scale Hydraulic Fracturing In A Deep Mine Kismet Project Summary 2016 written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with categories.
In support of the U.S. DOE SubTER Crosscut initiative, we established a field test facility in a deep mine and designed and carried out in situ hydraulic fracturing experiments in the crystalline rock at the site to characterize the stress field, understand the effects of rock fabric on fracturing, and gain experience in monitoring using geophysical methods. The project also included pre- and post-fracturing simulation and analysis, laboratory measurements and experiments, and we conducted an extended analysis of the local stress state using previously collected data. Some of these activities are still ongoing. The kISMET (permeability (k) and Induced Seismicity Management for Energy Technologies) experiments meet objectives in SubTER's "stress" pillar and the "new subsurface signals" pillar. The kISMET site was established in the West Access Drift of SURF 4850 ft (1478 m) below ground (on the 4850L) in phyllite of the Precambrian Poorman Formation. We drilled and cored five near-vertical boreholes in a line on 3 m spacing, deviating the two outermost boreholes slightly to create a five-spot pattern around the test borehole centered in the test volume at ~1528 m (5013 ft). Laboratory measurements of core from the center test borehole showed P-wave velocity heterogeneity along each core indicating strong, fine-scale (~1 cm or smaller) changes in the mechanical properties of the rock. The load-displacement record on the core suggests that the elastic stiffness is anisotropic. Tensile strength ranges between 3-7.5 MPa and 5-12 MPa. Permeability measurements are planned, as are two types of laboratory miniature hydraulic fracturing experiments to investigate the importance of rock fabric (anisotropy and heterogeneity) on near-borehole hydraulic fracture generation. Pre-fracturing numerical simulations with INL's FALCON discrete element code predicted a fracture radius of 1.2 m for a corresponding injection volume of 1.2 L for the planned fractures, and negligible microseismicity. Field measurements of the stress field by hydraulic fracturing showed that the minimum horizontal stress at the kISMET site averages 21.7 MPa (3146 psi) pointing approximately N-S (356 degrees azimuth) and plunging slightly NNW at 12°. The vertical and horizontal maximum stress are similar in magnitude at 42-44 MPa (6090-6380 psi) for the depths of testing which averaged approximately 1530 m (5030 ft). Hydraulic fractures were remarkably uniform suggesting core-scale and larger rock fabric did not play a role in controlling fracture orientation. Monitoring using ERT and CASSM in the four monitoring boreholes, and passive seismic accelerometer-based measurements in the West Access Drift, was carried out during the generation of a larger fracture (so-called stimulation test) at a depth of 40 m below the invert. ERT was not able to detect the fracture created, nor were the accelerometers in the drift, but microseismicity was detected for first (deepest) hydraulic-fracturing stress measurement. The CASSM data have not yet been analyzed. Analytical solutions suggest fracture radius of the large fracture (stimulation test) was more than 6 m, depending on the unknown amount of leak-off. The kISMET results for stress state are consistent with large-scale mid-continent estimates of stress. Currently we are using the orientation of the stress field we determined to interpret a large number of borehole breakouts recorded in nearby boreholes at SURF to generate a more complete picture of the stress field and its variations at SURF. The efforts on the project have prompted a host of additional follow-on studies that we recommend be carried out at the kISMET site.
Hydraulic Fracturing In Inclined Boreholes
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Author : Narayanan Harikrishnan
language : en
Publisher:
Release Date : 1994
Hydraulic Fracturing In Inclined Boreholes written by Narayanan Harikrishnan and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with categories.
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
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Author :
language : en
Publisher:
Release Date : 2001
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 has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with Engineering geology categories.
Lithology And Fracture Characterization From Drilling Investigations In The Mirror Lake Area Grafton County New Hampshire
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Author : Carole D. Johnson
language : en
Publisher:
Release Date : 1998
Lithology And Fracture Characterization From Drilling Investigations In The Mirror Lake Area Grafton County New Hampshire written by Carole D. Johnson and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with Borings categories.
Hydraulic Fracturing Using A Modified Borehole Deformation Gage In The Test Interval
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Author : Steven Anthony Dischler
language : en
Publisher:
Release Date : 1987
Hydraulic Fracturing Using A Modified Borehole Deformation Gage In The Test Interval written by Steven Anthony Dischler and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1987 with Boring categories.