冀东浅海探区隔水导管入泥深度研究

隔水导管是海洋钻井关键部分,确定合理的下入深度对于安全钻完井作业具有非常重要的意义。冀东浅海探区导管的入泥深度通常是根据经验确定,一般为泥面以下50m,存在一定的盲目性。本文根据隔水导管轴向受力分析,建立了隔水导管极限承载力计算模型,并利用VB语言编写程序根据地层性质计算隔水导管的最小入泥深度。同时为了验证计算结果的可靠性,对隔水导管贯入地层过程进行了室内模拟实验。实验表明：极限承载力计算值和实验值偏差在10%以内,说明建立的计算模型可靠性高,可用于冀东浅海探区单井隔水导管的最小入泥深度设计。

Study on the optimalSdrivingSdepthSofSriser in Jidong offshore exploration area

The riser is a key part of offshore drilling,and it is very important for drilling and completion to determine the reasonable depth of the riser. Currently,the optimal driving depth of riser in Jidong offshore exploration area is mostly base on the experience,which has a certain degree of blindness subjectivity.According to the axial stress analysis of the riser,the calculation model of ultimate bearing capacity and the program in VB language for calculating the optimal driving depth of riser have been established.To verify our results,the injection process is simulated by using laboratory experiment.Experiments show that the deviation between the calculation results and experimental results is less than 10%,and the reliability of the model is high.It can meet required by the riser design.