Predicting the occurrence of mixed mode failure associated with hydraulic fracturing, part 2 water saturated tests

Technical Report · Mon Sep 14 00:00:00 EDT 2015

DOI:https://doi.org/10.2172/1215562· OSTI ID:1215562

Bauer, Stephen J. ^[1]; Broome, Scott Thomas ^[1]; Choens, Charles ^[1]; Barrow, Perry Carl ^[1]

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1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

Seven water-saturated triaxial extension experiments were conducted on four sedimentary rocks. This experimental condition was hypothesized more representative of that existing for downhole hydrofracture and thus it may improve our understanding of the phenomena. In all tests the pore pressure was 10 MPa and confirming pressure was adjusted to achieve tensile and transitional failure mode conditions. Using previous work in this LDRD for comparison, the law of effective stress is demonstrated in extension using this sample geometry. In three of the four lithologies, no apparent chemo-mechanical effect of water is apparent, and in the fourth lithology test results indicate some chemo-mechanical effect of water.

• Research Organization: Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA)
• DOE Contract Number: AC04-94AL85000
• OSTI ID: 1215562
• Report Number(s): SAND-2015-7808R; 603682
• Country of Publication: United States
• Language: English