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Keywords: fracture toughness value
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Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-1107
... crack model. The modified SCB fracture toughness values are higher than the original SCB and CCNSCB fracture toughness values. shale gas fracture mechanics ccnscb method reservoir geomechanics Upstream Oil & Gas crack length determination toughness Reservoir Characterization complex...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0061
... analysis shows that the mean value of the fracture toughness of Sample 1 and Sample 2 are 0.61 mMPa , 0.50 mMPa , respectively (Fig.9). Sample 2 from Middle Bakken formation has a smaller fracture toughness value which shows that Middle Bakken is easier to be fractured. 1.61.20.80.40.0 12 10 8 6 4 2 0...
Proceedings Papers

Paper presented at the 49th U.S. Rock Mechanics/Geomechanics Symposium, June 28–July 1, 2015
Paper Number: ARMA-2015-634
... on the experimental results, a statistical regression analysis was conducted to obtain the optimum orientation angle to obtain the highest strength under indirect tensile loading. Statistical analysis showed anisotropy orientations of 45° gave the highest fracture toughness value. 1. INTRODUCTION...
Proceedings Papers

Paper presented at the DC Rocks 2001, The 38th U.S. Symposium on Rock Mechanics (USRMS), July 7–10, 2001
Paper Number: ARMA-01-0753
...-sensitive range of the given specimen type. The notch sensitivity analysis can be applied to discriminate invalid fracture toughness values in screening stage. Similarly, with an estimated fracture toughness for a rock material, the valid range of the initial crack length ratio for a given type of specimen...
Proceedings Papers

Paper presented at the The 34th U.S. Symposium on Rock Mechanics (USRMS), June 28–30, 1993
Paper Number: ARMA-93-0668
... Upstream Oil & Gas fracture toughness equation 1 toughness mechanics hydraulic fracturing strength in-situ fracture toughness fracture toughness value University laboratory test process zone laboratory determination stress intensity factor closing pressure proceedings stress...
Proceedings Papers

Paper presented at the The 32nd U.S. Symposium on Rock Mechanics (USRMS), July 10–12, 1991
Paper Number: ARMA-91-221
... petroleum industry. However, one should note that the use of fracture toughness values obtained under laboratory conditions may lead to erroneous conclusions. For example, Shlyapobersky (1985) reported that the apparent fracture toughness, determined from microfrac data, has values between one to two orders...
Proceedings Papers

Paper presented at the The 28th U.S. Symposium on Rock Mechanics (USRMS), June 29–July 1, 1987
Paper Number: ARMA-87-0149
... hydraulic fracturing stress intensity factor fracture toughness reservoir geomechanics Berea sandstone microcrack Reservoir Characterization Upstream Oil & Gas half-crack length Wellbore Design sandstone loading surface toughness Schmidt fracture toughness value propagation...
Proceedings Papers

Paper presented at the The 26th U.S. Symposium on Rock Mechanics (USRMS), June 26–28, 1985
Paper Number: ARMA-85-0497-1
... strain fracture toughness which is so widely applied to predict the onset of fracture in engineering materials may also be useful in predicting the onset of fracture in geological materials such as coal and oil shales. This paper examines fracture toughness values for coal from three different coal seams...
Proceedings Papers

Paper presented at the 19th U.S. Symposium on Rock Mechanics (USRMS), May 1–3, 1978
Paper Number: ARMA-78-0306
... strength experimental verification apparent fracture toughness configuration hydraulic fracturing fracture toughness prediction fracture toughness value tensile strength Upstream Oil & Gas tensile strength prediction fracture mechanics model toughness propagation Schmidt...

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