海上钻井隔水导管打入作业溜桩深度预测　　

Study on the slip pile depth prediction for offshore drilling conductor installation

张海山 杨进 严德 田瑞瑞 刘佳伟 王啸

ZHANG Haishan YANG Jin YAN De TIAN Ruirui LIU Jiawei WANG Xiao

中海石油中国有限公司上海分公司，上海　200030 中国石油大学，北京　102249

CNOOC Shanghai Branch, Shanghai 200030, China China University of Petroleum, Beijing 102249, China

目前桩体施工溜桩深度预测主要集中在大直径超长桩的打桩风险分析中，对海上隔水导管施工溜桩机理和深度预测缺乏研究，存在作业盲目性和风险性。通过对海上隔水导管施工中导管与平台几何关系分析、导管极限承载力计算和溜桩机理分析，提出了海上隔水导管施工溜桩深度预测理论模型。溜桩深度预测理论模型在我国某海域油气田数口井的隔水导管施工作业中得到了成功应用，施工预测深度范围与实际溜桩深度基本一致，为隔水导管施工风险评估提供了理论基础，确保了海上作业的安全性。

In view of the slip pile depth prediction in pile construction is concentrated on pile driving risk analysis of large diameter and super-long piles, but the slip depth and slip pile mechanism of offshore riser construction is lack of study, which means blindness and risk exist in operation. The geometrical relationship between conductor and offshore platform during pile driving operation, the ultimate bearing capacity of conductor and the slip pile mechanism were analyzed, and then the theoretical prediction model of the slip depth for offshore conductor driving construction was proposed. The theoretical prediction model of slip depth has been successfully applied in several wells in an offshore oil field, and the actual slip depth of conductor driving is nearly in line with the calculated result. The research achievements provide the theoretic foundation for risk assessment of conductor operation, and ensure security for offshore drilling.