针对深水油气田开发钻井表层导管的安装,业内提出了基于动力沉桩理论的深水钻井导管水下打桩技术,并通过实践证明了该技术的可行性。由于国内尚无该技术应用,为评价该技术在中国南海深水区块的适用性，从对导管可打性角度出发,基于南海深水典型表层土壤特性与钻井实践,对国外已实施油田的土壤特性进行了类比分析,利用波动方程分析软件建立了管-土-锤模型,分析并设定了打桩工况,对导管在设定工况下进行了可打性评估,分析了打桩过程导管管体应力、锤效率、锤击数表现及锤击能量影响。分析表明,对于南海深水区块,典型深水钻井导管能在设定打桩工况下安全锤入至南海深水典型导管入泥设计深度,导管的可打性满足作业要求,有利于该技术的探索。分析结果可以为南海深水导管水下技术应用评估提供参考。

As to the installation of deepwater oil and gas development drilling conductor, a new alternative, i.e. conductor subsea driving technology, has been proposed and carried out in recent years and its feasibility has been proven in practice. Due to the lack of application of this technology in China, in order to evaluate the applicability of this technology in the deepwater block of South China Sea, based on the typical surface soil characteristics of South China Sea and drilling practice, the paper makes an analogy analysis of the soil characteristics of the oil fields that have been implemented abroad. Meanwhile, a conductor-soil-hammer model has been established using the wave equation analysis software to analyze and set the driving conditions and boundary under which the conductor drivability is performed to analyze the conductor stress, the influence and interaction of hammer efficiency, output energy and blow counts. The analysis shows that for the deepwater block in South China Sea, the typical deepwater drilling conductor can be safely driven into the typical designed penetration under the given driving conditions. The driving performance meets the operational requirements, which is conductive to the exploration of this technology. The analysis results can provide reference for thee application assessment of this technology in the South China Sea.