The Effects of Operational Parameters on the Flow Characteristics in Annular Space During Under-Balanced Drilling Operations

Document Type : Full Length Research Article

Authors

1 Mechanical Engineering Department, Faculty of Gas and Petroleum, Yasouj University, Gachsaran, Iran

2 Department of Mechanical Engineering, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran

Abstract

In this research, gas-liquid-solid three-phase flow in the annulus during under-balanced drilling operations is simulated numerically. One-dimensional form of steady-state governing equations including mass and momentum conservation equations for each phase, gas equation of state, and saturation constraint equation in the Eulerian frame of reference are solved by a proposed algorithm. The computational code is validated by using experimental data from a real well, gas-liquid two-fluid numerical simulation, and also some mechanistic models of WellFlo software. Moreover, the results are compared with the experimental data from a laboratory study. The numerical code succeeds in predicting bottom hole pressure and obtaining the characteristic flow behavior during under-balanced drilling. Due to the importance of controlling flow characteristics during the drilling operations, the effects of change in the injected liquid flow rate, gas injection flow rate, choke pressure on the gas, liquid, and solid volume fractions, as well as gas, liquid, and solid velocity distributions along with the annulus, are investigated. According to the obtained results, the effects of liquid injection flow rate and injected gas flow rate on the flow characteristics are decreased along the annulus in the flow direction, but the effects of choke pressure on the flow characteristics are increased along the annulus in the flow direction. Consequently, to change the flow characteristics in the wellhead area, it is better to change the choke pressure and to affect the flow characteristics in the bottom-hole area, it is preferred to change the gas and liquid injection flow rate. In other words, depending on the required situation of flow characteristic changes, the appropriate operational parameter can be used.

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Main Subjects

References

[1] Lorentzen, R.J., Fjelde, K.K., Froyen, J., Lage, A.C., Naevdal, G. and Vefring, E.H., 2001, January. Under-balanced drilling: Real time data interpretation and decision support. In SPE/IADC drilling conference. Society of Petroleum Engineers. https://doi.org/10.2118/67693-MS.
[2] Lorentzen, R.J., Fjelde, K.K., Froyen, J., Lage, A.C., Naevdal, G. and Vefring, E.H., 2001, January. Under-balanced and low-head drilling operations: Real time interpretation of measured data and operational support. In SPE Annual Technical Conference and Exhibition. Society of Petroleum Engineers. https://doi.org/10.2118/71384-MS.
[3] Lorentzen, R.J., Naevdal, G. and Lage, A.C., 2003. Tuning of parameters in a two-phase flow model using an ensemble Kalman filter. International Journal of Multiphase Flow, 29(8), pp.1283-1309. https://doi.org/10.1016/S0301-9322(03)00088-0.
[4] Vefring, E.H., Nygaard, G., Fjelde, K.K., Lorentzen, R.J., Naevdal, G. and Merlo, A., 2002, January. Reservoir characterization during underbalanced drilling: Methodology, accuracy, and necessary data. In SPE Annual Technical Conference and Exhibition. Society of Petroleum Engineers. https://doi.org/10.2118/77530-MS.
[5] Vefring, E.H., Nygaard, G.H., Lorentzen, R.J., Naevdal, G. and Fjelde, K.K., 2006. Reservoir characterization during underbalanced drilling (UBD): Methodology and active tests. SPE Journal, 11(02), pp.181-192. https://doi.org/10.2118/77530-MS.
[6] Fan, J., Gao, C., Taihe, S., Liu, H. and Yu, Z., 2001, January. A comprehensive model and computer simulation for underbalanced drilling in oil and gas wells. In SPE/ICoTA Coiled Tubing Roundtable. Society of Petroleum Engineers. https://doi.org/10.2118/68495-MS.
[7] Perez-Tellez, C., 2003. Improved Bottom Hole Pressure Control for Underbalance Drilling Operation (Ph. D. thesis). Louisiana State University.
[8] Perez-Tellez, C., Urbieta-Lopez, A., Miller, A. and Banda-Morato, R.G., 2003, January. Bottomhole Pressure Measurements: Indispensable Tool for Optimizing Underbalanced Drilling Operations. In Offshore Technology Conference. Offshore Technology Conference. https://doi.org/10.4043/15061-MS.
[9] Fadairo, A.S. and Falode, O.A., 2009, January. Effect of drilling cuttings transport on pressure drop in a flowing well. In Middle East Drilling Technology Conference & Exhibition. Society of Petroleum Engineers. https://doi.org/10.2118/125707-MS.
[10] Yan, T., Wang, K., Sun, X., Luan, S. and Shao, S., 2014. State-of-the-art cuttings transport with aerated liquid and foam in complex structure wells. Renewable and Sustainable Energy Reviews, 37, pp.560-568. https://doi.org/10.1016/j.rser.2014.05.047
[11] Ghobadpouri, S., Hajidavalloo, E. and Noghrehabadi, A.R., 2017. Modeling and simulation of gas-liquid-solid three-phase flow in under-balanced drilling operation. Journal of Petroleum Science and Engineering, 156, pp.348-355. https://doi.org/10.1016/j.petrol.2017.06.015.
[12] Wei, N., Xu, C., Meng, Y., Li, G., Ma, X. and Liu, A., 2018. Numerical simulation of gas-liquid two-phase flow in wellbore based on drift flux model. Applied Mathematics and Computation, 338, pp.175-191. https://doi.org/10.1016/j.amc.2018.03.067
[13] Li, X., Ma, H., Zhao, H., Gao, D., Lu, B., Ding, S., Gong, D. and Ma, Z., 2020. Study on the model for predicting maximum allowable measured depth of a horizontal well drilled with underbalanced operation. Journal of Petroleum Science and Engineering, 191, p.107104.https://doi.org/10.1016/j.petrol.2020.107104.
[14] Evje, S. and Flåtten, T., 2003. Hybrid flux-splitting schemes for a common two-fluid model. Journal of Computational Physics, 192(1), pp.175-210. https://doi.org/10.1016/j.jcp.2003.07.001.
[15] Hatta, N., Fujimoto, H., Isobe, M. and Kang, J.S., 1998. Theoretical analysis of flow characteristics of multiphase mixtures in a vertical pipe. International Journal of Multiphase Flow, 24(4), pp.539-561. https://doi.org/10.1016/S0301-9322(97)00074-8.
[16] Jahangiri, M. and Delbari, O., 2020. Heat Transfer Correlation for Two Phase Flow in a Mixing Tank. Journal of Heat and Mass Transfer Research, 7(1), pp.1-10. https://doi.org/10.22075/jhmtr.2020.17712.1232.
[17] Falavand Jozaei, A., Tayebi, A., Shekari, Y. and Ghafouri, A., 2017. Numerical simulation of transient natural gas flow in pipelines using high order DG-ADER scheme. Journal of Heat and Mass Transfer Research, 4(1), pp.35-43. https://doi.org/10.22075/jhmtr.2016.497.
[18] Dranchuk, P.M. and Abou-Kassem, H., 1975. Calculation of Z factors for natural gases using equations of state. Journal of Canadian
138 S.Ghobadpouri / JHMTR 8 (2021) 127- 138
Petroleum Technology, 14(03). https://doi.org/10.2118/75-03-03.
[19] Bratland, O., 2010. Pipe flow 2: multi-phase flow assurance.
[20] Boyun, G., William, C. and Ali Ghalambor, G., 2007. Petroleum production engineering: a computer-assisted approach.
[21] Khezrian, M., Hajidavalloo, E. and Shekari, Y., 2015. Modeling and simulation of under-balanced drilling operation using two-fluid model of two-phase flow. Chemical
Engineering Research and Design, 93, pp.30-37. https://doi.org/10.1016/j.cherd.2014.05.007.
[22] Lage, A.C. and Time, R.W., 2000, January. An experimental and theoretical investigation of upward two-phase flow in annuli. In SPE Asia Pacific Oil and Gas Conference and Exhibition. Society of Petroleum Engineers. https://doi.org/10.2118/64525-MS.

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History

  • Receive Date: 27 January 2021
  • Revise Date: 15 May 2021
  • Accept Date: 15 May 2021

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