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Dynamic Analysis of Solid Expandable Tubular and Its Applications in Tahe Oilfield

  • Research Article - Petroleum Engineering
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Abstract

For ultra-deep horizontal wells in Tahe Oilfield in China, the solid expandable tubular (SET) technology was applied in the buildup section to isolate unstable mud stone with clays above the pay zone. This technology satisfies the requirements of geological water avoidance, and a larger hole size is adopted in the pay zone. This paper proposed a finite element dynamic model to analyze the expansion of the SET, and the impacts of the following factors on the expansion force required for the expandable tubular were analyzed: yield strength of the tubular material, solid tubular expansion ratio, the coefficient of friction between the expansion cone and the tubular, the angle of the expansion cone, movements velocity of the expansion cone, and DLS (dogleg severity). The calculation results indicate that a higher expansion ratio, a higher yield strength, and a higher friction coefficient of the SET result in a larger expansion force to different degrees, whereas the other factors have little effect on the expansion force. The dynamic expansion force calculation model established in this paper is consistent with the actual conditions, and the simulation calculation results can be applied to provide theoretical guidance for SET expansion operations.

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Fu, J., Tang, X., Zhou, W. et al. Dynamic Analysis of Solid Expandable Tubular and Its Applications in Tahe Oilfield. Arab J Sci Eng 40, 2437–2446 (2015). https://doi.org/10.1007/s13369-015-1740-8

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  • DOI: https://doi.org/10.1007/s13369-015-1740-8

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