Stress-strain response and seismic signature analysis of phyllite reservoir rocks from Blue Mountain geothermal field

Kamali-Asl, Arash; Kc, Bijay; Foroutan, Maziar; Ghazanfari, Ehsan; Cladouhos, Trenton T.; Stevens, Mathew

doi:10.1016/j.geothermics.2018.09.004

Cited by 20 publications

(7 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, the P waveforms did not exhibit any change with respect to the fracture orientation. However, as the mean total stress increased, the fracture closed due to crushing of the asperities, which increases the fracture specific stiffness of the rock specimen [4]. Therefore, the P wave velocity increased with the mean total stress.…”

Section: Resultsmentioning

confidence: 99%

“…P-wave is the fastest wave, which propagates by creating alternate zones of compression and rarefaction along the direction of the propagation [4,14,15] (Fig. 2(a)).…”

Section: Resultsmentioning

confidence: 99%

“…At laboratory scale, ultrasonic waves are shown to be sensitive to the different elements of geologic formations such as stress conditions, fluid saturations, internal structures of the intact rocks, and presence of fractures (or cluster of fractures) in the rock (e.g. [1][2][3][4][5]). Due to the lower cost, remote geophysical methods that use seismic waves are usually used in field (e.g.…”

Section: Introductionmentioning

confidence: 99%

“…Several experimental (e.g. [4,17]) as well as numerical (e.g. [14,18]) studies have verified that the ultrasonic wave is affected by the presence of fracture in the rock.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Effect of fracture orientation on ultrasonic wave signatures

Ghazanfari

2020

E3S Web Conf.

Self Cite

View full text Add to dashboard Cite

Fluid flow through low-permeable rock masses is dominated by transport through discontinuities such as fractures, faults, and joints present in the rock. These discontinuities are beneficial for some geo-resources such as geothermal, oil and gas reservoir, but detrimental for other applications such as CO2 storage and hazardous waste isolation. Fracture orientation plays a critical role during the design of the geo-resources. Often times, ultrasonic waves are used in the field to locate and characterize the fractures. In this study, the effect of fracture orientation (0° to 90°) on ultrasonic wave signatures was investigated by conducting a series of experiments on a granite rock with a longitudinal fracture under confining pressures of 15, 30, and 45 MPa. Ultrasonic wave signatures during the experiment were collected using the ultrasonic transducers embedded in the core holders that were attached to the two ends of the specimen. Results indicated sensitivity of the ultrasonic wave velocities, waveforms, and amplitudes (cross-polarized S-waves) to the fracture orientation.

show abstract

Section: Resultsmentioning

confidence: 99%

“…P-wave is the fastest wave, which propagates by creating alternate zones of compression and rarefaction along the direction of the propagation [4,14,15] (Fig. 2(a)).…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Several experimental (e.g. [4,17]) as well as numerical (e.g. [14,18]) studies have verified that the ultrasonic wave is affected by the presence of fracture in the rock.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effect of fracture orientation on ultrasonic wave signatures

Ghazanfari

2020

E3S Web Conf.

Self Cite

View full text Add to dashboard Cite

show abstract

“…In recent years, experimental and simulation investigations into breakage index, breakage efficiency, breakeage energy and particle size distribution using instruments (uniaxial compression [4,5], drop hammer impact machine [6][7][8], and dynamic Hopinson bar impact [9][10]) and numerical simulation have been conducted by several researchers [11][12][13]. Kamali-Asl, et al have investigated the effects of anisotropy on the mechanical response of one vertically-drilled and one horizontally-drilled sub-core that were extracted from a phyllite core [14]. Kamali-Asl, et al characterized shale gas rock to improve the constitutive and numerical modeling [15].…”

Section: Introductionmentioning

confidence: 99%

Study on the Mechanism of Particle Breakage under New Composite Loads

Tong

et al. 2019

J. Eng. Technol. Sci.

View full text Add to dashboard Cite

A theoretical model of particle breakage under a novel combination of dynamic and static loads is presented in this paper. In order to enhance the capability of the actual physical and mechanical properties towards rocks, parallel connector parameters of a bonded particle model (BPM) from the discrete element method (DEM) were investigated by uniaxial compression tests. Then, the efficiency evaluation index system of particle breakage was defined and different simulations of various parameters were set, i.e. the speed of the moving plate, the curvature of the moving plate, the curvature of the fixed plate, the space between the two plates, and the initial particle radius. The mechanism of particle breakage was analyzed by the relationships between the efficiency evaluation index and various parameters. The investigation of particle breakage theory and law can help to design and improve crushing equipment, reduce the energy consumption of the crusher, and improve the quality of the broken product.

show abstract