Journal of Canadian Petroleum Technology
Volume 51, Number 3, May 2012, pp. 215-222

SPE-157852-PA

How To Assess a Depth of Permeability Impairment of the Wellbore Zone Using Drillstem-Testing Flow-Period Data

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DOI  More information 10.2118/157852-PA http://dx.doi.org/10.2118/157852-PA

Citation

  • Szpunar, T. and Budak, P. 2012. How To Assess a Depth of Permeability Impairment of the Wellbore Zone Using Drillstem-Testing Flow-Period Data. J Can Pet Technol  51 (3): 215-222. SPE-157852-PA. http://dx.doi.org/10.2118/157852-PA.

Discipline Categories

  • 6.6.3 Pressure Transient Testing
  • 6.6.5 Well Performance Monitoring, Inflow Performance
  • 6.6.4 Drillstem/Well Testing

Keywords

  • DST flow period data, depth of permeavbility imapirment, filtrate invasion, wellbore zone

Summary

This paper provides a simple procedure for evaluation of depth of permeability impairment within the wellbore zone using drillstem-testing (DST) flow-period data. Also computed are skin factor, permeability of the wellbore zone, and permeability of the reservoir. Contrary to the type-curve-fitting method, straight-line approximations were used to compute these values. All calculations presented are for "real-world" data.

© 2012. Society of Petroleum Engineers

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History

  • Original manuscript received: 13 July 2011
  • Revised manuscript received: 10 December 2011
  • Manuscript approved: 15 December 2011
  • Published online: 24 April 2012
  • Version of record: 1 May 2012