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Xu, Feng
- Effect of Confining Pressure on the Mechanical Properties of Thermally Treated Sandstone
Abstract Views :284 |
PDF Views:93
Authors
Affiliations
1 State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, Hubei, CN
2 State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, CN
1 State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, Hubei, CN
2 State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, CN
Source
Current Science, Vol 112, No 06 (2017), Pagination: 1101-1106Abstract
To understand the effect of confining pressure on the mechanical properties of thermally treated coarse sandstone, uniaxial and triaxial compression tests were conducted for six groups of thermally treated sandstone from Xujiahe Formation in southwestern China under confining pressures of 0-40 MPa. The test results indicate that 600°C is a critical threshold of the thermal damage of sandstone by SEM and mechanical tests. When temperature is below 600°C, few micro cracks are observed by SEM. Peak strength, elastic modulus, cohesion and internal friction angle remain constant or increase with increasing temperature and all these values decrease when temperature is above or equal to 600°C under different confining pressures. Under the uniaxial and low confining pressure (≤ 5 MPa), the failure mode shows single or multiple splitting planes and it is easier to generate complex cracks with increasing temperature. Under high confining pressure (10-40 MPa), the failure mode shows a simple shear plane after treatment at different temperatures, i.e. 25-1000°C. The results may provide guidance for rock engineering design after high temperature exposure.Full Text
References
- Wong, T. F., Mech. Mater., 1982, 1, 3–17.
- Wai, R. S. C. and Lo, K. Y., Can. Geotech. J., 1982, 19(3), 307–319.
- Zhang, Z. X., Yu, J., Kou, S. Q. and Lindqvist, P. A., Int. J. Rock Mech. Min. Sci., 2001, 38(2), 211–225.
- Kanagawa, K., Cox, S. F. and Zhang, S, Q., J. Geophys. Res. – Solid Earth, 2000, 105(B5), 1115–11126.
- Baud, P., Wong, T. F. and Zhu, W., Int. J. Rock Mech. Min. Sci., 2014, 67(4), 202–211.
- Misra, S. et al., J. Geophys. Res. – Solid Earth, 2014, 119(5), 3971–3985.
- Zhang, L., Mao, X. and Lu, A., Sci. China Ser. E, 2009, 52(3), 641–646.
- Liu, S. and Xu, J., Eng. Geol., 2015, 185, 63–70.
- Chaki, S., Takarli, M. and Agbodjan, W. P., Constr. Build. Mater., 2008, 22(7), 1456–1461.
- Liu, S. and Xu, J., Int. J. Rock Mech. Min. Sci., 2014, 71, 188–193.
- Wu, G., Wang, Y., Swift, G. and Chen, J., Geotech. Geol. Eng., 2013, 31(2), 809–816.
- Tian, H., Kempka, T., Xu, N.-X. and Ziegler, M., Rock Mech. Rock Eng., 2012, 45(6), 1113–1117.
- P. G R, Viete, D. R., Chen, B. J. and Perera, M. S. A., Eng. Geol., 2012, 151, 120–127.
- Klein, E., Baud, P., Reuschle, T. and Wong, T. F., Phys. Chem. Earth Part A, 2001, 26(1–2), 21–25.
- Dillen, M. W. P., Cruts, H. M. A., Groenenboom, J., Fokkema, J. T. and Duijndam, A. J. W., Geophysics, 1999, 64(5), 1603–1607.
- Saluja, S. S., Singh, D. P. and Kasiviswanadham, M., J. Mines, Met. Fuels, 1977, 25(5), 131–138.
- Zhang, H., Kang, Y., Chen, J., Han, L. and Wang, Y., Chin. J. Rock Mech. Eng. (Suppl. 2), 2007, 26, 4227–4231.
- Deutsch, The ISRM Suggested Methods for Rock Characterization, Testing and Monitoring: 2007–2014 Springer. Springer International Publishing, 2015.
- Mao, H. J., Yang, C. H. and Liu, J., Chin. J. Rock Mech. Eng., 2006, 25(6), 1204–1209.
- Yang, S. Q., Jiang, Y. Z., Xu, W. Y. and Chen, X. Q., Int. J. Solids Struct., 2008, 45(17), 4796–4819.
- Wu, G., Xing, A. and Zhang, L., Chin. J. Rock Mech. Eng., 2007, 26(10), 2110–2116.
- Effect of the Drilling Fluid on Hardness Characteristics of Tight Sandstone
Abstract Views :252 |
PDF Views:76
Authors
Affiliations
1 National and Local Joint Engineering Laboratory for Road Engineering and Technology in Mountainous Areas, Chongqing, CN
2 State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, CN
1 National and Local Joint Engineering Laboratory for Road Engineering and Technology in Mountainous Areas, Chongqing, CN
2 State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, CN
Source
Current Science, Vol 115, No 11 (2018), Pagination: 2015-2018Abstract
To understand the effect of the drilling fluid on hardness characteristics of tight sandstone, indentation hardness tests were conducted on tight sandstone which were soaked in a water- or oil-based drilling fluid at different temperatures and time. The results of the study indicate that: (1) the hardness of tight sandstone decreased rapidly after being soaked in the water-based or oil-based drilling fluid and it decreased by 22.9% and 10.1% respectively after two hours; (2) with the increase in soaking time, the hardness remained almost constant when soaked in the oil-based drilling fluid. However, the reduction in hardness reached 33.1% after soaking in the water-based drilling fluid for 15 days; (3) there was little change in the hardness with the increase in temperature in the oil-based drilling fluid, but in the water-based drilling fluid, the hardness decreased at a temperature above 50°C; (4) high temperature would cause mineral expansion and hydration, resulting in hardness reduction with increase in soaking time in the water-based drilling fluid which would lead to the softening of the tight sandstone’s surface structure.Full Text
References
- Wu, X., Liu, Q. and Zhu, J., Mar. Petrol. Geol., 2016, 79, 412–425.
- Xu, F., Yang, C. H. and Guo, Y. T., Chin. J. Geotech. Eng., 2016, 38, 187– 192.
- Dai, J. X., Ni, Y. Y. and Wu, X. Q., Petrol. Explor. Dev., 2012, 39, 277–284.
- Dai, J. X., Ni, Y. Y. and Gong, D. Y., Mar. Petrol. Geol., 2017, 79, 426–438.
- Chen, P., Drilling and Completion Engineering, Petroleum Industry Press, 2015.
- Yuan, H. Y. and Chen, P., Nat. Gas Ind., 2015, 35, 71–77.
- Xu, F. et al., Arab. J. Geosci., 2017, 10(6), 141.
- Yang, X., Experiment Study on Water and Chemical Solution on Mechanical Properties of Rock, Hubei University of Technology, Wuhan, 2010.
- Tan, Z. Y., Chai, H. B. and Liu, W. J., Chin. J. Rock Mech. Eng., 2005, 24, 2439–2448.
- Jin, Y. and Chen, M., Petrol. Drill. Tech., 2004, 32, 12–14.
- Wen, H., Chen, M. and Jin, Y., Oil Drill. Prod. Technol. (in Chinese), 2014, 36, 57–60.
- Fan, X., Lin, H. and Xiong, W., J. China Univ. Min. Tech., 2015, 44, 233–240.
- Liu, X. J., Xiong, J. and Liang, L. X., Nat. Gas Geosci., 2014, 25, 1644–1652.
- Luo, C., Study Effect of Brittle Shale Hydration Effect on Wellbore Stability (D), South West Petroleum University, Cheng Du, 2015.
- Xu, F. et al., Curr. Sci., 2017, 112, 1101–1106.
- Wang, W., Liu, T. G. and Lv, J., Chin. J. Rock Mech. Eng., 2012, 31, 3607–3617.
- Fan, X., Lin, H. and Xiong, W., J. China Univ. Min. Tech., 2015, 44, 233–240.
- Zhou, H. W., Zuo, J. P. and Wang, J., Experimental researches on meso-scale failure of Beishan granite under thermalmechanical coupling. In Proceedings of the Symposium on Underground Waste Disposal (C). CNNC Beijing Research Institute of Uranium Geology, Beijing, 2008.