南黄海铁板砂地层插桩分析及应对

Offshore Oil(2021)

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Abstract
南黄海盆地存在海底地层岩性为中密的灰色粉砂,砂颗粒级配均匀,孔隙水饱和,俗称铁板砂地层.自升式钻井平台在该种地层插桩时桩腿难以入泥,且入泥深度较小,另外随着平台自身及环境载荷变化,桩腿会发生下沉,严重影响作业及平台自身安全.通过对南黄海某探井在作业海区海底铁板砂地层的插桩深度浅、作业期间桩腿下沉情况进行原因分析,提出针对性措施及建议,为后续类似井作业提供参考借鉴.
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