Effect of Eccentricity on Annulus Pressure of Aerated Drilling

ZHANG Nan, BI Xueliang, CHEN Xun, YU Xiaowen, LIU Shanshan

Abstract


In the past two decades, aerated drilling has been applied to improving recovery of the low permeability oil and gas reservoirs at home and abroad. This technology can improve the level of exploration and development, reduce the cost of drilling and protect reservoir. Because of its advantages, aerated drilling has been developed and promoted rapidly. And its theoretical study has also been further developed. In this paper, the impact of the eccentric drill string to annular multiphase fluid in aerated drilling was studied. Based on mathematical solution of eccentric annuli, combined with multiphase flow control equations and flow law, aerated drilling eccentric annulus pressure formula was derived. Under the condition of Concentricity and different degrees of eccentricity, the eccentric annulus pressure were calculated. The distribution law of annulus pressure with depth and the influence law of the eccentricity to annulus pressure were analyzed.
Key words: Aerated drilling, Eccentric annuli; Annulus pressure


Keywords


Aerated drilling, Eccentric annuli; Annulus pressure

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References


[1] Francis, P. A., Davidson, I. A., Harthi, S., Geldof, W., Culen, M. S., & Jenkins, T. (2003, February). Low risk/high reward strategy drives underbalanced drilling impementation in PDO. Paper presented at SPE/IADC Drilling Conference, Amsterdam, Netherlands.

[2] Gas Technology Institute (GTI). (2001). Underbalanced Completions: A Technology Review. Chicago, USA: Gas Technology Institute.

[3] Divine, R. (2003, March). Planning is critical for underbalanced applications with under experienced operators. Paper presented at IADC/SPE Underbalanced Technology Conference and Exhibition, Houston, Texas.

[4] Hogg, T. W. (1997). Colombian underbalanced drilling operations achieve breakthrough success. Paper presented at IADC/SPE, Amsterdam, Netherlands.

[5] Zhang, H. M., & Yang, H. (2004). DNP-02 CBM well underbalanced horizontal milti-branchs wellbore drilling engineering technical proposal. Beijing, China: Asian American Coal (China), Inc.

[6] Lage, A. C. V. M., & Time, R. W. (1986). An experimental and theoretical investigation of upwrd tow- phase flow in Annuli. SPE Journal, 7(3), 325-336.

[7] Lage, A. C. V. M., & Time, R. W. (2000). Mechanical model for upward tow-phase flow in Annuli. SPE 63127.

[8] Brill, J. P., & Mukherjee, H. (1999). Multiphase flow in wells. USA: The Society of Petroleum Engineers Inc.

[9] Taitel, Y, & Barnea, D. (1983). Counter gas-liquid vertical flow, model for flow pattern and pressure drop. J. Multiphase Flow, (9), 637-647.

[10] Eaton, D. (1997). Fracture gradien prediction for the new generation [Online forum comment]. Retrieved from http://business.highbeam.com/1886/article-1G1-20095161/fracture-gradient-prediction-new-generation

[11] Sunthanker, A. A., Kuru, E., & Miska, S. (2001). New development in aerated mud hydraulics for drilling in inclined well. SPE Drilling & Completion, 18(2), 152-158.




DOI: http://dx.doi.org/10.3968/6455

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