Main Article Content


 The aim of this study is to explain the mechanics of tubular expansion in irregularly shaped boreholes such as those frequently observed in the upper Natih reservoirs. Statistical analysis of borehole data does not indicate a strong correlation between the non-circularity and expanded tubular’s in such boreholes. A two-dimensional (2-D) finite element model was developed using commercial software to determine the non-circularity of an expanded tubular and those data were compared with the measured values. A parametric study was also conducted and spider plots were generated to determine the amount of irregularity in the expanded tubulars so that optimum operational parameters could be identified to limit cross-section irregularities during the expansion process.



Tubular expansion Irregular boreholes Spider diagram Finite element analysis

Article Details

How to Cite
Marketz, F., & Al-Hiddabi, S. (2013). Spider Diagram for Tubular Expansion with Restraints. The Journal of Engineering Research [TJER], 10(1), 1–10.


  1. Akgun F, Mitchell, BJ, Huttelmaier HP (1994), API tubular ovality and stresses in horizontal wells with finite element method. SPE Drilling and Completion 9:103-106.
  2. Fokker PA, Verga F, Egberts PJP (2005), New semi analytic technique to determine horizontal well productivity index in fractured reservoirs. SPE Reservoir Evaluation Engineering 8(1):123-131.
  3. Lighthelm DJ, Hoek PJ, Hos P, Faber MJ, Roeterdink RC (2006), Improved oil recovery in fractured carbonate reservoirs: Don't give induced fractures a chance. SPE paper 98386. SPE Europe/EAGE Conference, Vienna, 12-15 June.
  4. Marketz F, Leuranguer C, Welling RWF, Ogoke V (2005), Waterflood appraisal-Well delivery with expandable tubular. Paper # IPTC-10345. International Petroleum Technology Conference, Doha, Qatar, 21-23 November.
  5. Ozkaya SI, Richard PD (2006), Fractured reservoir characterization using dynamic data in a carbonate field. SPE Reservoir Evaluation Engineering 9(3):227-238.
  6. Pervez T, Qamar SZ, Seibi A, Al-Jahwari FK (2008), Use of SET in cased and open holes: Comparison between aluminum and steel. Journal of Materials and Design 29:811-817.
  7. Pervez T, Qamar SZ (2011), Finite element analysis of tubular ovality in oil well. Advanced Materials Research 264-265:1654-1659.
  8. Welling RWF, Marketz F, Moosa R, Riyami N, Follows EJ, Bruijn G, Hosny K (2007), Inflow profile control in horizontal wells in a fractured carbonate using swellable elastomers. SPE paper # 105709. 15th SPE Middle East Gas Show and Conference, Bahrain, 11-14 March.