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Journal of Hydrodynamics

, Volume 18, Issue 1, pp 396–402 | Cite as

Pressure drop models for gas-liquid two-phase flow and its application in underbalanced drilling

Article

Abstract

Hasan-Kabir’s model and modified Ansari’s model were used to analyze the pressure drop of two-phase flow in underbalanced drilling (UBD). The mathematical and physical models of UBD were established and solved numerically. The effects of injection rate of gas and liquid and, back pressure on bottom-hole pressure were analyzed. The bottom-hole pressure control procedures were concluded. The computer simulations were validated with data obtained from experiment performed in a full-scale well located at Louisiana State University. The prediction accuracy of two methods was analyzed. The results showed that the error with the Hasan-Kabir model’ is less than 10%, however the error with the modified Ansari model’ is less than 5%. Ansari’s model is superior to Hasan-Kabir’s model in predicting pressure. This supplies theoretical support for success in UBD.

Key words

gas-liquid two-phase flow pressure drop models underbalanced drilling pressure predictions accuracy comparison 

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References

  1. [1]
    GUO, B, HARELAND, G., and RAJTAR, J., Computer Simulation Predicts Unfavorable Mud Rate for Aerated Mud Drilling. SPE26892, 1993Google Scholar
  2. [2]
    SHARMA, Y., KAMP, A., Yonezawa, T., RIVERO, L.M., Kobayashi, A., and Gonzalez, J., Simulating Aerated Drilling. SPE59424, 2000Google Scholar
  3. [3]
    TIAN, Shifeng, MEDLEY, GEORGE H. and STONE, CHARLES R., Optimizing circulation while drilling underbalanced. World Oil, June 2000, pp48-55Google Scholar
  4. [4]
    LIU, Gefei, MEDLEY Jr, GEORGE H, Houston, Foam computer model helps in analysis of underbalanced Drilling. Oil and Gas J., July 1, 1996, pp18-27Google Scholar
  5. [5]
    BIJLEVELD, A. F., KOPER, M., SAPONJA, J., Development and Application of an Underbalanced Drilling Simulator. SPE39303, 1998Google Scholar
  6. [6]
    LAGE, A.C.V.M., TIME, R.W., An Expermental and Theoretical Investigation of Upward Two-Phase Flow in Annuli. SPE64525, 2000Google Scholar
  7. [7]
    HASAN, A. R. and KABIR, C. S., Two-phase flow in vertical and inclined annuli. Int. J. Multiphase Flow, Vol. 18, No. 2, 1992, pp279–293CrossRefGoogle Scholar
  8. [8]
    HASAN, A. R., Void fraction in bubbly and slug flow in downward vertical and inclined systems. SPE26522, 1995Google Scholar
  9. [9]
    LAGE, A.C.V.M. and TIME, R.W., Mechanistic Model for Upward Two-Phase Flow in Annuli. SPE63127, 2000Google Scholar
  10. [10]
    PEREZ-TELLEZ, C. Smith, J.R, EDWARDS, J. K., A New comprehensive mechanistic model for underbalanced drilling improves wellbore pressure predictions. SPE74426, 2002Google Scholar
  11. [11]
    BEGGS, H.D. and BRILL, J.P., A study of two phase flow in inclined pipes. JPT, May 1973, pp607–617Google Scholar
  12. [12]
    ZHOU Kaiji, Multiphase-flow circulation system analysis in UBD operations[J]. Natural Gas Industry, 1998,18(5):44–47Google Scholar
  13. [13]
    CHEN Jialang, CHEN Taoping, WEI Zhaosheng, Gas-Liquid Two-phase Flow of Rod Pump Well. Petroleum Industry Press, 1994, 5, pp6–15Google Scholar
  14. [14]
    HASAN, A. R. and KABIR, C. S., A Study of multiphase flow behavior in vertical wells. SPE15138, 1988Google Scholar
  15. [15]
    ANSARI, A. M., SYLVESTER, N. D., SARICA, C., SHOHAM, O. and BRILL, J. P., A Comprehensive mechanistic model for upward two-phase flow in wellbores. SPE Production & Facilities, May 1994CrossRefGoogle Scholar
  16. [16]
    LUO Shiying, A mechanistic model and simulation for underbalanced drilling. Ph.D Dissertation, Southwest Petroleum Institute, 1999, 5 (in Chinese)Google Scholar

Copyright information

© China Ship Scientific Research Center 2006

Authors and Affiliations

  1. 1.Institute of Oil and GasPetroleum University of ChinaBeijingChina

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