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作为世界海上三大高温高压地区之一,我国南莺歌海盆地在开发中不仅面临着典型高温高压钻井技术难题[1],其开发井轨迹与井身结构还会受到来自平台数量与位置等因素的限制而必须采用大斜度、小井眼等方式进行设计,从而给该区域高温高压钻井带来更高的挑战。本文结合目标油气田实际情况,通过优选适合大斜度、水平井的水力参数计算及分析模型,针对目标井小井眼井段钻进过程中的主要水力参数进行了分析计算与优化,并对关键水力参数开展了敏感性分析工作。优化结果表明,目标井水力参数设计结果与实际作业值吻合良好,所优选的分析模型及方法具有较高的精度,对今后类似油气田钻井设计、提高作业安全与效率具有一定指导意义。
As one of the three major high-temperature and high-pressure seas in the world, the South China Sea in Songhuahe Basin not only faced the typical high-temperature and high-pressure drilling technology problems [1], but also the development well trajectory and well bore structure were affected by the number and location of platforms Due to the limitation of the factors, the design must be carried out in the way of the large slope and slim hole so as to bring higher challenges to the HTHP drilling in this area. According to the actual conditions of the target oil and gas field, the hydraulic parameters of the wellbore of the target well are analyzed, calculated and optimized through the hydraulic parameter calculation and analysis model suitable for the high-gradient and horizontal wells. The key hydraulic Parameter sensitivity analysis carried out. The optimization results show that the design results of the hydraulic parameters of the target well are in good agreement with the actual operation values, and the optimized analysis models and methods are of high precision, which is of guiding significance to drilling design in similar oil and gas fields in the future and improving operation safety and efficiency.