Authors: Amorer, G; Duffield, S; De Ross, J; Viegas, G

Open access courtesy of:

DOI https://doi.org/10.36487/ACG_repo/2205_81

Cite As:
Amorer, G, Duffield, S, De Ross, J & Viegas, G 2022, 'Surface hydraulic fracturing trial at Cadia East', in Y Potvin (ed.), Caving 2022: Fifth International Conference on Block and Sublevel Caving, Australian Centre for Geomechanics, Perth, pp. 1173-1188, https://doi.org/10.36487/ACG_repo/2205_81

Download citation as:   ris   bibtex   endnote   text   Zotero


Abstract:
Historically, preconditioning practice at Newcrest’s Cadia Valley Operations has been to conduct the drilling and fracturing activities associated with hydraulic fracturing from underground excavations. In 2020, Newcrest undertook a trial to investigate the application of oil and gas industry techniques from the surface as an alternative to the approach from underground. Prior to this trial, these techniques had not been tested in a hard rock mining environment. The trial was designed to show that hydraulic preconditioning operations, including drilling, fracturing and monitoring, could be successfully completed solely from surface. The primary objective of the trial was to investigate the potential safety, logistical, schedule and financial benefits that could be realised from executing hydraulic preconditioning from surface. The trial consisted of preparation of the surface drill pad and water supply, the drilling of three boreholes each over 1,520 m deep, collection of detailed geophysical logging, execution of 132 fractures and the monitoring and verification of execution outcomes. The results of the trial greatly exceeded expectations for hydraulic fracture extents and the volume preconditioned. This paper discusses the Surface Preconditioning Trial stages and summarises the outcomes against the trial objectives.

Keywords: hydraulic fracturing, preconditioning, block caving, microseismics

References:
Catalan, A, Onederra, I & Chitombo, G 2017, ‘Evaluation of intensive preconditioning in block and panel caving – part II, quantifying the effect on seismicity and draw rates’, Mining Technology, April 2017.
Cuello, D & Newcombe, G 2018, ‘Key geotechnical knowledge and practical mine planning guidelines in deep, high-stress, hard rock conditions for block and panel cave mining’, in Y Potvin & J Jakubec (eds), Caving 2018: Proceedings of the Fourth International Symposium on Block and Sublevel Caving, Australian Centre for Geomechanics, Perth, pp. 17–36,
/ACG_rep/1815_0.2_Cuello
Flores-Gonzalez, G 2019, ‘Major hazards associated with cave mining: are they manageable?’, in J Wesseloo (ed.), MGR 2019: Proceedings of the First International Conference on Mining Geomechanical Risk, Australian Centre for Geomechanics, Perth, pp. 31–46,
King, GE 2012, ‘Hydraulic fracturing 101’, paper SPE 152596 presented at the SPE Hydraulic Fracturing Technology Conference, The Woodlands, Texas, USA, .
Lett, J 2022, ‘The Role of Pre-conditioning in mitigating seismic hazards – an innovative method for future caving operations’, in 10th International Symposium on Rockbursts and Seismicity in Mines (RaSiM10), Society for Mining, Metallurgy and Exploration, Arizona.
Peytchev, P, Malik, SD, Varghese, R, Doodraj, S, Benny, P, Raghav, S & Narayanan, S 2013, ‘Solving Hard/Abrasive Sedimentary and Igneous Formation Challenge: New PDC Bit Design Reduces 6-in Section Drilling Time by 47%’, Paper presented at SPE/IADC Middle East Drilling Technology Conference and Exhibition, Dubai, UAE.
Raymond, D, Knudsen, S, Blankenship, D, Bjornstad, S, Barbour, J & Schen, A 2012, ‘PDC Bits Outperform Conventional Bit in Geothermal Drilling Project’, GRC Transactions, vol. 36.
Urbancic, T, Baig, A, Viegas, G, Thompson, JM, Anderson, D, Rice, C & Martin, L 2017, ‘Effective Constraint of RTA Models Utilizing Microseismicity Derived Flow Attributes’, Proceedings of the Unconventional Resources Technology Conference, urtec-2017–2689356.
Viegas, G, Urbancic, T & Thompson, J 2018, ‘Utilizing microseismicity to define stimulated surface area and effective permeability’, First Break, vol. 36, no. 9, pp. 65–74, –2397.n0121.




© Copyright 2022, Australian Centre for Geomechanics (ACG), The University of Western Australia. All rights reserved.
Please direct any queries or error reports to repository-acg@uwa.edu.au