Effects of confining pressure and temperature on mixed-mode (I-II) fracture toughness of a limestone rock

N. A. Al-Shayea; K. Khan; S. N. Abduljauwad

doi:10.1016/S1365-1609(00)00003-4

Effects of confining pressure and temperature on mixed-mode (I-II) fracture toughness of a limestone rock

N. A. Al-Shayea^*, K. Khan, S. N. Abduljauwad

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

266 Scopus citations

Abstract

Studying fracture toughness behavior at elevated temperatures and confining pressures is valuable for a number of practical situations such as hydraulic fracturing used to enhance oil and gas recovery from a reservoir, and the disposal or safe storage of radioactive waste in underground cavities. Mixed-mode (I-II) fracture toughness under simulated reservoir conditions of high temperature and confining pressure was studied using straight notched Brazilian disk (SNBD) specimens under diametrical compression. Rock samples were collected from a limestone formation outcropping in the Central Province of Saudi Arabia. Tests were conducted under an effective confining pressure (σ₃) of up to 28 MPa (4000 psi), and a temperature of up to 116°C. The results show a substantial increase in fracture toughness under confining pressure. The pure mode-I fracture toughness (K(IC)) increased by a factor of about 3.7 under a σ₃ of 28 MPa compared to that under ambient conditions. The variation of K(IC) was found to be linearly proportional to σ₃. The pure mode-II fracture toughness (K(IIC)) increased by a factor of 2.4 upon increasing σ₃ to 28 MPa. On the other hand, K(IC) at 116°C was only 25% more than that at ambient conditions. Some ductile behavior was displayed by the rock samples at a high temperature and confining pressure. (C) 2000 Elsevier Science Ltd. All rights reserved.

Original language	English
Pages (from-to)	629-643
Number of pages	15
Journal	International Journal of Rock Mechanics and Mining Sciences
Volume	37
Issue number	4
DOIs	https://doi.org/10.1016/S1365-1609(00)00003-4
State	Published - 2000

Bibliographical note

Funding Information:
The authors acknowledge the support of King Fahd University of Petroleum & Minerals for providing computing and laboratory facilities. They also would like to acknowledge the support of Saudi-ARAMCO through Research Institute, KFUPM. They are also grateful to Dr Abdulraheem, from the Petroleum Engineering Section, RI and to Mr Hasan Zakaria, from the geotechnical laboratory.

ASJC Scopus subject areas

Geotechnical Engineering and Engineering Geology

Access to Document

10.1016/S1365-1609(00)00003-4

Cite this

@article{4d3a1f33c8d64b7880979b5773949c14,

title = "Effects of confining pressure and temperature on mixed-mode (I-II) fracture toughness of a limestone rock",

abstract = "Studying fracture toughness behavior at elevated temperatures and confining pressures is valuable for a number of practical situations such as hydraulic fracturing used to enhance oil and gas recovery from a reservoir, and the disposal or safe storage of radioactive waste in underground cavities. Mixed-mode (I-II) fracture toughness under simulated reservoir conditions of high temperature and confining pressure was studied using straight notched Brazilian disk (SNBD) specimens under diametrical compression. Rock samples were collected from a limestone formation outcropping in the Central Province of Saudi Arabia. Tests were conducted under an effective confining pressure (σ3) of up to 28 MPa (4000 psi), and a temperature of up to 116°C. The results show a substantial increase in fracture toughness under confining pressure. The pure mode-I fracture toughness (K(IC)) increased by a factor of about 3.7 under a σ3 of 28 MPa compared to that under ambient conditions. The variation of K(IC) was found to be linearly proportional to σ3. The pure mode-II fracture toughness (K(IIC)) increased by a factor of 2.4 upon increasing σ3 to 28 MPa. On the other hand, K(IC) at 116°C was only 25\% more than that at ambient conditions. Some ductile behavior was displayed by the rock samples at a high temperature and confining pressure. (C) 2000 Elsevier Science Ltd. All rights reserved.",

author = "Al-Shayea, \{N. A.\} and K. Khan and Abduljauwad, \{S. N.\}",

note = "Funding Information: The authors acknowledge the support of King Fahd University of Petroleum \& Minerals for providing computing and laboratory facilities. They also would like to acknowledge the support of Saudi-ARAMCO through Research Institute, KFUPM. They are also grateful to Dr Abdulraheem, from the Petroleum Engineering Section, RI and to Mr Hasan Zakaria, from the geotechnical laboratory. ",

year = "2000",

doi = "10.1016/S1365-1609(00)00003-4",

language = "English",

volume = "37",

pages = "629--643",

journal = "International Journal of Rock Mechanics and Mining Sciences",

issn = "1365-1609",

publisher = "Elsevier B.V.",

number = "4",

}

TY - JOUR

T1 - Effects of confining pressure and temperature on mixed-mode (I-II) fracture toughness of a limestone rock

AU - Al-Shayea, N. A.

AU - Khan, K.

AU - Abduljauwad, S. N.

N1 - Funding Information: The authors acknowledge the support of King Fahd University of Petroleum & Minerals for providing computing and laboratory facilities. They also would like to acknowledge the support of Saudi-ARAMCO through Research Institute, KFUPM. They are also grateful to Dr Abdulraheem, from the Petroleum Engineering Section, RI and to Mr Hasan Zakaria, from the geotechnical laboratory.

PY - 2000

Y1 - 2000

N2 - Studying fracture toughness behavior at elevated temperatures and confining pressures is valuable for a number of practical situations such as hydraulic fracturing used to enhance oil and gas recovery from a reservoir, and the disposal or safe storage of radioactive waste in underground cavities. Mixed-mode (I-II) fracture toughness under simulated reservoir conditions of high temperature and confining pressure was studied using straight notched Brazilian disk (SNBD) specimens under diametrical compression. Rock samples were collected from a limestone formation outcropping in the Central Province of Saudi Arabia. Tests were conducted under an effective confining pressure (σ3) of up to 28 MPa (4000 psi), and a temperature of up to 116°C. The results show a substantial increase in fracture toughness under confining pressure. The pure mode-I fracture toughness (K(IC)) increased by a factor of about 3.7 under a σ3 of 28 MPa compared to that under ambient conditions. The variation of K(IC) was found to be linearly proportional to σ3. The pure mode-II fracture toughness (K(IIC)) increased by a factor of 2.4 upon increasing σ3 to 28 MPa. On the other hand, K(IC) at 116°C was only 25% more than that at ambient conditions. Some ductile behavior was displayed by the rock samples at a high temperature and confining pressure. (C) 2000 Elsevier Science Ltd. All rights reserved.

AB - Studying fracture toughness behavior at elevated temperatures and confining pressures is valuable for a number of practical situations such as hydraulic fracturing used to enhance oil and gas recovery from a reservoir, and the disposal or safe storage of radioactive waste in underground cavities. Mixed-mode (I-II) fracture toughness under simulated reservoir conditions of high temperature and confining pressure was studied using straight notched Brazilian disk (SNBD) specimens under diametrical compression. Rock samples were collected from a limestone formation outcropping in the Central Province of Saudi Arabia. Tests were conducted under an effective confining pressure (σ3) of up to 28 MPa (4000 psi), and a temperature of up to 116°C. The results show a substantial increase in fracture toughness under confining pressure. The pure mode-I fracture toughness (K(IC)) increased by a factor of about 3.7 under a σ3 of 28 MPa compared to that under ambient conditions. The variation of K(IC) was found to be linearly proportional to σ3. The pure mode-II fracture toughness (K(IIC)) increased by a factor of 2.4 upon increasing σ3 to 28 MPa. On the other hand, K(IC) at 116°C was only 25% more than that at ambient conditions. Some ductile behavior was displayed by the rock samples at a high temperature and confining pressure. (C) 2000 Elsevier Science Ltd. All rights reserved.

UR - https://www.scopus.com/pages/publications/0034353211

U2 - 10.1016/S1365-1609(00)00003-4

DO - 10.1016/S1365-1609(00)00003-4

M3 - Article

AN - SCOPUS:0034353211

SN - 1365-1609

VL - 37

SP - 629

EP - 643

JO - International Journal of Rock Mechanics and Mining Sciences

JF - International Journal of Rock Mechanics and Mining Sciences

IS - 4

ER -

Effects of confining pressure and temperature on mixed-mode (I-II) fracture toughness of a limestone rock

Abstract

Bibliographical note

ASJC Scopus subject areas

Access to Document

Fingerprint

Cite this