Abstract
Post-accident tracing is necessary for risk assessment and prevention in oil drilling industry. The blowouts of the wellbore were triggered by falling of broken drill string, which generated high surge pressure at the bottom hole and induced fractures with the formation. Because pre-kick condition of the wellbore is unclear, it is necessary to ascertain the condition by calculating key factors such as surge pressure and fracture width. Calculations in this research are based on Herschel-Bulkley’s model for non-Newtonian fluid and Lietard’s model for one-dimensional radial loss. It is concluded that the 4,500 m-long drill string may have generated more than 20 MPa of surge pressure as it fell to the bottom hole and could have caused over 20 m3 of drilling fluid loss over 7–8 min. In addition, the research also assessed risks for the wellbore and estimated time allowance for responses under different levels of surge pressure and fracture width. It finds that under high level of surge pressure, a fracture wider than 10 mm can instantly take in tens of cubic meters of drilling fluid and make the wellbore totally uncontrollable, but a mild fracture no wider than 0.25 mm may need about 10 h to consume 20 m3 of drilling fluid. At the width of 1 mm, a fracture will take in 20 m3 of mud over about 6 min, a situation that most matches the condition of the accident wellbore.
Copyright 2023, IFEDC Organizing Committee.
This paper was prepared for presentation at the 2023 International Field Exploration and Development Conference in Wuhan, China, 20–22 September 2023.
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References
Xu, T.T., Liu, Y.J., Shen, W.: Leakage Prevention and Plugging Technology in Drilling Engineering, pp. 88–103. Petroleum Industry Press, Bei**g (1997)
Wang, H.G., Liu, X.S.: Study on steady surge pressure of casson fluid in concentric annulus of directional wells. Drill. Fluid Complet. Fluid (06), 38–43+47+81–82 (1994)
Wang, H.G., Su, Y.N., Liu, X.S.: Numerical analysis of steady surge pressure of power-law fluid in eccentric annuli. Acta Petrolei Sinica 19(03), 116–121+111 (1998)
Wang, H.G., Liu, X.S.: Study on steady fluctuation pressure of RS fluid in concentric annulus of directional well. Drill. Process 02, 4–9 (1995)
Wang, H.G., Liu, X.S.: Solution of surge pressure of power-low fluid in the deviated selections of directional well. J. Univ. Petrol. China (01), 29–33 (1996)
Wang, H.G., Liu, X.S.: Study on steady surge pressure of yield-pseudoplastic fluid in a concentric annulus. Appl. Math. Mech. 01, 15–22 (1996)
Fan, H.H., Liu, X.S.: Study on steady state fluctuation pressure calculation model of bingham vertical well. Oil Drill. Prod. Technol. 03, 13–18 (1993)
Fan, H.H., Liu, X.S.: Analysis on surge pressure caused by mud viscosity in a vertical well. J. Univ. Petrol. China (02), 8–15 (1990)
Fan, H.H., Liu, X.S.: Steady state fluctuating pressure calculation model for Herschel-Balclay liquid vertical wells. Petrol. Drill. Techn. (01), 51–54+70 (1994)
Lietard, O., Unwin, T., Guillot, D., et al.: Fracture Width LWD and Drilling Mud / LCM Selection Guidelines in Naturally Fractured Reservoirs. In: European Petroleum Conference, Milan, pp. 25–56 (1996)
Li, D.Q.: Numerical and Experimental Investigations of Drilling Fluid Losses in Fractured Formations, pp. 64–75. Southwest Petroleum University, Chengdu (2012)
Jia, L.C., Chen, M., Hou, B., et al.: Drilling fluid loss model and loss dynamic behavior in fractured formations. Pet. Explor. Dev. 41(01), 95–101 (2014)
Nie, R., **a, H., Mao, L., et al.: Research on conversion time between lost circulation and overflow for the fractured stratum. Petroleum 6(01), 98–105 (2020)
Liu, Y.X.: Research on Casing Leakage Prevention Technology Under Narrow Safe Density Window in Tarim Ultra-deep Well, pp. 36–42. Southwest Petroleum University, Chengdu (2019)
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Liang, S., Luo, Fy., Yu, Hh., Gao, J., Shu, Xl. (2024). Analysis and Research on Influence Factors of Leakage Caused by Surge Pressure. In: Lin, J. (eds) Proceedings of the International Field Exploration and Development Conference 2023. IFEDC 2023. Springer Series in Geomechanics and Geoengineering. Springer, Singapore. https://doi.org/10.1007/978-981-97-0256-5_25
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