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当深层高温高压气井采用酸压措施生产一体化管柱完井投产时,既要防止管径太小酸化压裂时摩阻太大导致井口施工压力太大,影响井口的安全性,也要防止管径太大井筒携液能力差,使气井过早停喷,因此需要选择合理的完井管柱或完井管柱组合。通过利用实验设计软件对影响气井井口施工压力的4个主要参数进行优化设计,在优化设计的基础上对设计出的14种参数组合进行了井口施工压力计算,并进一步回归出了井口施工压力计算方程,经与实际计算的结果对比,模型的平均相对误差为0.24%,同时还利用优化设计得到了不同井深不同管柱组合下的井口施工压力曲线图版,可以从图版上很直观地选择管柱。运用该方法可以计算不同参数组合下的井口施工压力并进行敏感性分析,也可以对新井进行管柱优化设计。
When the deep high temperature and pressure gas wells using acid pressure measures to produce integrated column completion and commissioning, it is necessary to prevent the pipe diameter is too small When the friction resistance is too high, the wellhead pressure is too large, the wellhead safety is affected, Pipe diameter is too large Well fluid carrying capacity is poor, the gas well to stop spraying prematurely, so need to choose a reasonable completion string or completion string combination. Through the use of experimental design software to optimize the design of the four main parameters that affect the construction pressure of the wellhead, based on the optimal design of the 14 parameters of the combination of wellhead construction pressure calculation, and further regression of the wellhead construction pressure calculation Compared with the actual calculation results, the average relative error of the model is 0.24%. At the same time, we get the pressure curve of wellhead construction under different well depths by using the optimized design. The column can be selected intuitively from the plate . Using this method, the pressure of wellhead construction under different combinations of parameters can be calculated and the sensitivity analysis can be carried out, and the new well can also be optimized for pipe string design.