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Keywords: brittleness
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Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1437
... on mechanical parameters could be obtained, which would be vital references for ultra-deep sandstone reservoir development. Rock mechanical properties such as uniaxial compressive, triaxial compressive, Brazilian tensile, shear strength, and brittle index were acquired. Variation laws were studied...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1438
... mechanic experiments were conducted on shale samples from the same formation with various depths. Rock mechanical properties such as triaxial compression and brittleness were focused on to acquire variation laws of mechanical parameters such as triaxial compressive strength, tensile strength, shear...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1570
... of brittleness indices, it is found the nominal "ductile" regions do not behave as expected. They are weaker, but not consistently more ductile. Furthermore, some brittleness indices lead to contradictory conclusions. For example, zones which would be considered the most brittle according to the proportion...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1581
... ABSTRACT: This paper aims to investigate the effect of cyclic thermal shock on mechanical properties and brittleness of granite. Uniaxial compression tests and brittleness evaluation was performed on granite samples after cyclic heating and water-cooling treatment. Further, characteristics...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1061
... ABSTRACT: Understanding the true failure mechanism of rock and rock-like materials has been a significant challenge in rock mechanics particularly in the rocks with high brittleness where the sample fails rapidly under complex mixed mode of shearing and multiple tensile cracking. This study...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1680
... significance for the variation of mechanical properties and brittleness assessment of continental shale under the influence of fracturing fluid immersion. 1. Introduction In recent years, typical shale gas resources has developed rapidly, the oil and gas theory and fracturing technology have been upgraded...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1934
... oil & gas drilling operation optimization complex reservoir correlation optimize perforation selection porosity brittleness technical conference avg poisson drilling data acquisition shale gas wellbore design exhibition stix software oklahoma hareland permeability caney shale...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1152
... in order to figure out that. The result shows that under the same experimental condition, brittle deformation occurs in tight dolomite, while plastic deformation appears in tight limestone; in addition, compressive strength and Young's modulus of dolomite surpass limestone. The deformation mechanism...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1108
..., tensile strength, density, brittleness and Cerchar abrasivity index were carried out on a rock specimen. Then relations between measured intact rock properties and measured cutting force via LCM tests were examined. It is found that the intact rock properties could be employed to estimate cutting force...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0136
... ABSTRACT: Shale brittleness is a very important parameter for shale gas exploitation. Due to the complex mineral composition and micro-structure of shale rocks, shale rocks are usually characterized by strong heterogeneity and anisotropy, which makes it strong anisotropic in mechanical...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0332
... ABSTRACT: Currently, some reservoir brittleness evaluation methods can only obtain the fracability results near the borehole, but they cannot study the three dimensional (3D) distribution of the fracability of reservoirs. Based on the generation mechanism of the complex fracture...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-2117
... ABSTRACT: To understand the effect of cold water injection on the mechanical properties and brittleness of rock, a series of mechanical tests were performed on granite samples. Firstly, granite samples were slowly heated to a series of target temperatures and then rapidly cooled down using...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1892
... ABSTRACT: Hydraulic fracturing can generate large fracture networks, which is good for enhancing the recovery of tight reservoir. Fracability evaluation is essential for design of hydraulic fracturing. Based on the review of the existing brittle and fracability evaluation methods...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-273
... to investigate the effect of cryogenic liquid nitrogen on the physical/mechanical properties of shale samples. Successively, the changes in shale brittleness, pore structure and fracture toughness were quantitatively evaluated by elastic parameters, acoustic velocity and tensile strength, respectively. Finally...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-713
... friction angle post-peak strain mechanical behavior friction angle generalized cohesion brittleness stress-strain curve generalized internal friction angle 1. INTRODUCTION The rock has very complex mechanical properties due to the heterogeneity. Many engineering practices show...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-767
... complex reservoir carbon dioxide fracture complexity co 2 experiment Upstream Oil & Gas hf branch chang-7 tight sandstone fracture specimen he8-1 Zhang structural geology tight sandstone brittleness slickwater sandstone specimen he8-3 experimental study fracture geometry 1...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-897
... is investigated for a suite of rocks and the impact of confining pressure on their failure mechanism and brittle-ductile transition is studied. The samples are wrapped with copper jacket such that the confining fluid does not communicate with the rock matrix. Then, by applying a constant confining pressure...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-1178
... ABSTRACT: The stability of soft rock cliffs can be treated nowadays by using advanced calculation techniques, as the hybrid FDEM approach, which are capable of simulating rock fragmentation processes owing to post-failure material brittleness. In order to assess the stability of cliffs...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0080
...) and brittleness of rock samples. Rock brittleness is a function of UCS and Brazilian tensile strength (BTS). Thus, collected data of these parameters were hired to develop and train artificial neural networks (ANN) as an artificial intelligence (AI) method for estimation of drilling tool wear using data of rock...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0255
... on several shale specimens, and explore the effect of the intermediate principal stress on the failure properties of shale. Results indicate that the intermediate principal stress has a measurable contribution to rock strength, and impacts rock brittleness during the fracturing process. Failure laws...

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