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    高儲層壓力區(qū)塊生產(chǎn)套管柱優(yōu)化設計及配套套管的開發(fā)與制造

    Optimization Design of Casing String for Production in High Reservoir-pressure Blocks and Development and Manufacture of Applicable Casings

    • 摘要: 針對克深氣田克深13等新勘探開發(fā)區(qū)塊儲層埋藏深、地層壓力高、關井壓力高達110 MPa的難點，對塔標Ⅱ號井身的套管柱結構進行了優(yōu)化設計，并開發(fā)了配套的Φ206.38 mm×17.25 mm BG140V BGT2的非API規(guī)格高強度、高韌性、高氣密性套管。優(yōu)化設計后的生產(chǎn)套管柱既能滿足高關井壓力要求，也可滿足鉆機大鉤懸重要求。評價試驗表明，新設計開發(fā)的Φ206.38 mm×17.25 mm BG140V BGT2套管可以滿足克深氣田新勘探區(qū)塊的復雜使用工況要求。套管材料的韌脆轉變溫度低于-74℃，確保了在-38℃極限環(huán)境溫度下的施工和采氣生產(chǎn)安全。

       

      Abstract: Addressing the difficulties associated with the newly-explored/exploited blocks of Keshen Gas Field like Keshen 3, including deep reservoir, high pressure of the stratum, and so high a shut-in pressure as up to 110 MPa, the design for optimization of the casing string structure of the hole geometry of Well TabiaoⅡis made.Accordingly the Φ206.38 mm×17.25 mm hi-strength, hi-toughness and hi-air tightness non-API BG140V BGT2 casing is developed.The optimized casing string can not only meet the high shut-in pressure requirement, but also satisfy the requirement for hanging load of the drilling rig rotary hook.Relevant evaluation test result shows that the newly designed and developed Φ206.38 mm×17.25 mm BG140V BGT2 casing is capable of meeting the complicated service conditions of the newly-explored blocks of Keshen Oilfield, and that the FATT of the casing material is under-74℃, which meansthat safety for construction and gas production under thelimitingambient temperatureof-38℃shall be ensured.

       

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