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第一届世界稠油大会9 Drilling and Completions 共有9篇论文

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    本帖最后由 fortune860101 于 2011-10-13 06:48 编辑

    第一届世界稠油大会Technical Paper\Drilling and Completions 9
    Casing Design and Analysis for Heavy Oil Wells
    J. XIE
    C-FER Technologies, Canada

    Abstract
    Heavy oil recovery uses primary or thermal production technologies. The primary production method often involves continuous sand production to maximize fluid rates. The thermal processes usually consist of some variation of Cyclic Steam Stimulation (CSS) or Steam Assisted Gravity Drainage (SAGD).
    Heavy oil production poses serious challenges to well casing designs. In addition to the installation loads such as hanging/buoyancy forces and well curvature effect, a casing must support the thermal strains due to the temperature change and formation movements induced by well production. In many field operations, the thermal loading and formation movements can cause large casing strains in excess of the elastic limit. Therefore, a strain-based concept should be used for casing design in order to utilize the allowable strain capacity beyond the yield. The allowable strain design limit is defined by many studies as the strain required to cause structural failure of casing connections.

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