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Title: Images of Fracture Sustainability Test on Stripa Granite

Images of the Stripa Granite core before and after the fracture sustainability test. Photos of fracture faces of Stripa Granite core.
Publication Date:
Report Number(s):
DOE Contract Number:
FY13 AOP 5.1
Product Type:
Research Org(s):
DOE Geothermal Data Repository; Lawrence Berkeley National Laboratory
Lawrence Berkeley National Laboratory
Sponsoring Org:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Geothermal Technologies Program (EE-2C)
15 Geothermal Energy; geothermal; fracture; sustainability; stripa granite; fracture face images; core images; granite fractures; granite core; LBNL; granite
OSTI Identifier:
  1. The Geothermal Data Repository (GDR) is the submission point for all data collected from researchers funded by the U.S. Department of Energy's Geothermal Technologies Office (DOE GTO). The DOE GTO is providing access to its geothermal project information through the GDR. The GDR is powered by OpenEI, an energy information portal sponsored by the U.S. Department of Energy and developed by the National Renewable Energy Laboratory (NREL).
No associated Collections found.
  1. Spreadsheet containing the raw measured data, calibrated data, and brief explanation of data for Test1 Stripa Granite Geomechanical/Geochemical Test. Stress on fracture ~20.7 MPa.
  2. This folder contains X-ray CT images and an explanation related to the shear induced permeability testing of Stripa granite
  3. This data file is for test 2. In this test a sample of granite with a pre cut (man made fracture) is confined, heated and differential stress is applied. max temperature in this this system development test is 95C. test details on the spreadsheets--note thtamore » there are 2 spreadsheets « less
  4. Borehole W1 is a NQ core hole drilled at our test site in Socorro. The rock is rhyolite. Borehole W1 which was used to test gas-gas explosive mixtures is 55 feet deep with casing (pinkish in the drawing) set to 35 feet. The model ismore » a representation of the borehole and the holes we cored around the central borehole after the test. The brown colored core holes showed dye when we filled W1 with water and slightly pressurized it. This indicates there was some path between W1 and the colored core hole. The core holes are shown to their TD in the drawing. The green plane is a fracture plane which we believe is the result of the explosions of the gas mixture in W1. Data resource is a 2D .pdf Solid Works Drawing of borehole w-1 « less
  5. Six samples were evaluated in unconfined and triaxial compression, their data are included in separate excel spreadsheets, and summarized in the word document. Three samples were plugged along the axis of the core (presumed to be nominally vertical) and three samples were plugged perpendicular tomore » the axis of the core. A designation of "V"indicates vertical or the long axis of the plugged sample is aligned with the axis of the core. Similarly, "H" indicates a sample that is nominally horizontal and cut orthogonal to the axis of the core. Stress-strain curves were made before and after the testing, and are included in the word doc.. The confining pressure for this test was 2800 psi. A series of tests are being carried out on to define a failure envelope, to provide representative hydraulic fracture design parameters and for future geomechanical assessments. The samples are from well 52-21, which reaches a maximum depth of 3581 ft +/- 2 ft into a gneiss complex. « less