Hydraulic Fracturing Process: Roles of In Situ Stress and Rock Strength

Abstract:

This paper presents results of a comprehensive study involving analytical and field experimental investigations into the factors controlling the hydraulic fracturing process. Analytical theories for fracture initiation of vertical and horizontal borehole are reviewed. The initiation and propagation process of hydraulic fracturing is performed in the field by means of hydraulic fracturing and stepwise hydraulic fracturing, the effect of factors such as in-situ stress and rock strength on fracture propagation process is studied and discussed. The fracture initiation pressures estimated from the analytical model and field experiments are compared as well as the fracturing process during case 1and case 2. Results from the analytical model and field experiments conducted in this study are interpreted with a particular effort to enlighten the factors controlling the hydraulic fracturing process.

• Periodical: Advanced Materials Research (Volumes 616-618)
• Pages: 435-440
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.616-618.435
• Online since: December 2012
• Authors: Yan Jun Feng, Xiu Wei Shi
• Keywords: Factor, Hard Roof, Hydraulic Fracturing, In Situ Stress, Rock Strength

References

[1] Fan, J., et al., Directional hydraulic fracturing to control hard-roof rockburst in coal mines. International Journal of Mining Science and Technology, 2012. 22(2): pp.177-181.

DOI: 10.1016/j.ijmst.2011.08.007

[2] Matsui, K., H. Shimada and H.Z. Anwar, Acceleration of massive roof caving in a longwall gob using a hydraulic fracturing. Mining science and technology, 1999: pp.43-46.

[3] Rahman, M.K., et al., Unsuccessful hydraulic fracturing cases in Australia: Investigation into causes of failures and their remedies. Journal of Petroleum Science and Engineering, 2007. 57(1–2): pp.70-81.

DOI: 10.1016/j.petrol.2005.07.009

[4] Zhang, X., et al., Initiation and growth of a hydraulic fracture from a circular wellbore. International Journal of Rock Mechanics and Mining Sciences, 2011. 48(6): pp.984-995.

DOI: 10.1016/j.ijrmms.2011.06.005

[5] Huang, J., D.V. Griffiths and S. Wong, Initiation pressure, location and orientation of hydraulic fracture. International Journal of Rock Mechanics and Mining Sciences, 2012. 49: pp.59-67.

DOI: 10.1016/j.ijrmms.2011.11.014

[6] Hubbert, M.K. and D.G. Willis, Mechanics of Hydraulic Fracturing. Transactions of Society of Petroleum Engineers of AIME, 1957. 210: pp.153-168.

DOI: 10.2118/686-g

[7] Yew, C.H., Mechanics of hydraulic fracturing. 1997: Gulf Professional Publishing.

[8] Hossain, M.M., M.K. Rahman and S.S. Rahman, Hydraulic fracture initiation and propagation: roles of wellbore trajectory, perforation and stress regimes. Journal of Petroleum Science and Engineering, 2000. 27(3–4): pp.129-149.

DOI: 10.1016/s0920-4105(00)00056-5