中国南海荔湾区块喷射导管设计入泥深度研究

导管入泥深度的合理设计是深水喷射钻井作业成功实施的关键.通过分析中国南海荔湾区块的地质条件,总结出了中国南海荔湾区块土壤强度随深度变化的关系,结合中国南海喷射导管结构的详细数据,给出了导管承载力随时间的变化以及导管最小入泥深度随时间 的变化.计算方法与结论可为今后中国南海深水喷射钻井导管入泥深度设计提供参考.

Research on the Design of Injection Catheter Driving Depth in the Liwan Block of the South China Sea

The rational design of injection catheter driving depth is a key of successful implementation of jet drilling operation in deep water. By analyzing the geological conditions in the Liwan Block of the South China Sea and combining with the detailed information about the structures of the injection catheter in the South China Sea, the relationship of the changes of soil strength with time is summarized and the variations of both the bearing capacity and the least driving depth of the catheter with time are given. The methods for the calculation of the injection catheter driving depth and the conclu- sions thus obtained could provide useful references for the future driving depth design of the jet drilling catheter in the deep water of the South China Sea.