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1-20 of 32
Keywords: microfracture
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Proceedings Papers
Publisher: American Rock Mechanics Association
Paper presented at the 58th U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2024
Paper Number: ARMA-2024-0055
... tests and further investigated with mesoscopic fluid dynamics – microscopic solid mechanics coupling simulations. In this work, two field-scale porous media fluid flow models, consisting of rock matrix, randomly distributed microfractures and a major hydraulic fracture, are developed to evaluate...
Proceedings Papers
Publisher: American Rock Mechanics Association
Paper presented at the 57th U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2023
Paper Number: ARMA-2023-0300
...). clastic rock geologist sedimentary rock mudrock reservoir geomechanics compressibility pore pressure united states government hysteresis phyllosilicate reservoir characterization liquid bridge microfracture negative compressibility geology rock type mudstone bulk modulus air pressure s...
Proceedings Papers
Publisher: American Rock Mechanics Association
Paper presented at the 56th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2022
Paper Number: ARMA-2022-0009
.... In contrast, in strongly cemented glutenite and sandstone, acoustic emission does not occur until the load rises to the peak load. In the weakly cemented glutenite, an extensive fracture process zone (FPZ) exists near the fracture tip, where microfractures appear and coalesce to form the main fracture...
Proceedings Papers
Publisher: American Rock Mechanics Association
Paper presented at the 56th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2022
Paper Number: ARMA-2022-0213
... oil & gas hydraulic fracturing casing and cementing flow in porous media displacement co 2 microfracture continuity equation integrity storage geological storage fracture geometry cement plug strength equation reservoir characterization governing equation coefficient interface...
Proceedings Papers
Publisher: American Rock Mechanics Association
Paper presented at the 56th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2022
Paper Number: ARMA-2022-0363
... determined based on rock mechanics and in-situ stress conditions interpreted by logging and loboratory test. In this study, the parameters such as microscopic mineral composition , micropore and microfracture were introduced to establish a multi-scale data set. Besides, the equilibrium degree of fracture...
Proceedings Papers
Publisher: American Rock Mechanics Association
Paper presented at the 56th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2022
Paper Number: ARMA-2022-0398
... sequence microfracture experiment sequential journal specimen propagation wellbore horizontal stress difference pipeline ARMA 22 0398 Stress Interference Between Fractures of Alternating Fracturing of Horizontal Wells Wenrui Wang, Guangqing Zhang, Chunyang Zhao, Liji Shen, Houze Chen China...
Proceedings Papers
Publisher: American Rock Mechanics Association
Paper presented at the 56th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2022
Paper Number: ARMA-2022-2209
... are directly meshed, resolving grain-grain interfaces. Semi-ductile microfracture is simulated by prescribing a combination of inter-granular brittle fracture and intra-granular grain plasticity. Pristine (undamaged) and damaged microstructures are simulated in uniaxial compression tests and compared...
Proceedings Papers
Publisher: American Rock Mechanics Association
Paper presented at the 56th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2022
Paper Number: ARMA-2022-2055
... ABSTRACT: The complex fracture network generated from hydraulic fracturing is of great importance for well productivity in unconventional reservoirs. However, numerous natural or induced microfractures are closed without proppant placement after hydraulic fracturing is completed. Micro...
Proceedings Papers
Publisher: American Rock Mechanics Association
Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1159
... method of rock softening degree of shale hydration was put forward. The rock mechanical parameters and the dynamic change law of induced microfractures were analyzed. The results shown that shale hydration has an important influence on rock mechanical parameters, in which rock compressive strength, peak...
Proceedings Papers
C. Lu, Q. J. Zeng, J. Wang, Q. Y. Meng, J. B. Wang, H. G. Lu, J. D. Wang, Z. J. Du, X. B. Meng, G. Q. Zhou, M. S. Song
Publisher: American Rock Mechanics Association
Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1318
... oil & gas hydraulic fracturing fracture characterization fracture length displacement axial stress reservoir characterization complex reservoir engineering concentration tortuosity 1 tortuous micro-fracture lu stress condition closure stress mpa microfracture normal stress...
Proceedings Papers
Publisher: American Rock Mechanics Association
Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1751
... mechanism tight sandstone triaxial compressive strength microfracture reaction Microstructure experimental result tensile strength matrix ARMA 19 1751 Super-Critical CO2 Weakening Effect on Strength of Tight Sandstone with a Weak Plane: experimental results and causes Guangqing Zhang, Yuanxun...
Proceedings Papers
Publisher: American Rock Mechanics Association
Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1595
... air voids) are sheared, flattened, and sites of crack opening. Micron-scale capillary porosity, determined using SEM image processing, is similar for all specimens. The results from these few experiments indicate that microfracturing of cement during triaxial deformation results in permeability...
Proceedings Papers
Publisher: American Rock Mechanics Association
Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-202
... ABSTRACT: Several laboratory experiments are carried out to investigate the effects of microfractures on stress-dependent permeability. An analytical model depending on pore elasticity theory is proposed to study the related influencing factors. The results show that each curve of stress...
Proceedings Papers
Publisher: American Rock Mechanics Association
Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0294
... stress parameter b, defined as b = (s 2 – s 3 )/(s 1 – s 3 ), the effects stress-induced anisotropy on deformation and permeability was observed to be consistent with expected microstructural changes related to the opening/closing of microfractures due to the change in shear stress magnitude. Changes...
Proceedings Papers
Publisher: American Rock Mechanics Association
Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0553
... are conducted on crushed samples, and a new method is proposed to differentiate between matrix and microfractures by using diffusion data. A large amount of salt ions exit in shale pores and can diffuse into fracturing fluids after fracturing operations. To a great extent, ion diffusion rate is determined...
Proceedings Papers
Publisher: American Rock Mechanics Association
Paper presented at the 50th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2016
Paper Number: ARMA-2016-552
... microfractures and extend previous microfractures on initial fracture surface; a refracturing network appeared in the stimulation test with cryogenic treatment. The test results indicate that the refracture reorientation depends on the failure of the weakened zones induced by cryogenic treatment, apart from geo...
Proceedings Papers
Publisher: American Rock Mechanics Association
Paper presented at the 49th U.S. Rock Mechanics/Geomechanics Symposium, June 28–July 1, 2015
Paper Number: ARMA-2015-488
... in fracturing between the static and cyclic loading. It was found that the cyclic loading had an important effect on microfracture propagation through the Fracture Propagation Zone (FPZ).p> 1. INTRODUCTION Rock cutting is a common rock breakage, or excavation mechanism in tunneling, mining, well drilling...
Proceedings Papers
Publisher: American Rock Mechanics Association
Paper presented at the 47th U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2013
Paper Number: ARMA-2013-653
... hysteresis was observed in strain versus pressure response in the first and second pressurization cycles. Only after two or three cycles, the measured strain response became fully reversible, and equilibration was four times faster compared to the first cycle. SEM imaging showed that microfractures had...
Proceedings Papers
Publisher: American Rock Mechanics Association
Paper presented at the 46th U.S. Rock Mechanics/Geomechanics Symposium, June 24–27, 2012
Paper Number: ARMA-2012-562
... and formation pressure in determining the crack volume changes were found to be significant. The results could be used to relate the significant reduction in production from some of the shale gas wells to the closure of microfractures or even larger non-propped fractures. 1. INTRODUCTION The scarce amount...
Proceedings Papers
Publisher: American Rock Mechanics Association
Paper presented at the 44th U.S. Rock Mechanics Symposium and 5th U.S.-Canada Rock Mechanics Symposium, June 27–30, 2010
Paper Number: ARMA-10-325
... of a wellbore. It is therefore rare that more than one or two large natural fractures are preserved in core, precluding attempts to quantify fracture spacing. Microfracture scaling is a method to extrapolate large-fracture spacing using microscopic fractures, whose average spacings may be sufficiently small...
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