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影响大位移井钻井技术风险的因素较多,但大位移井钻井技术风险主要是由钻井风险和后勤保障风险两线组成,包括:水平垂深比,井眼净化,下套管斜深,扭矩与摩阻,井壁稳定性,钻井液性能,中靶能力,完井风险,钻机更新,钻机失效。大位移井钻井技术风险的多因素综合评价方法,是对各种因素的风险系数、权重、成功率做全面的分析,并用数学方法处理,使其结果更加直观、定量。对这些因素的综合评价有利于确定风险的范围,提高移钻井的成功率。
There are many factors that affect the technical risk of drilling in large displacement wells. However, the risk of drilling technology in large displacement wells mainly consists of drilling risk and logistics support risk, including horizontal and vertical ratio, hole cleaning, casing depth, torque And friction, borehole stability, drilling fluid properties, target capability, completion risk, rig update, rig failure. The multi-factor comprehensive evaluation method of drilling technology risk in large displacement well is to comprehensively analyze the risk coefficient, weight and success rate of various factors and process it with mathematical method to make the result more intuitive and quantitative. The comprehensive evaluation of these factors will help determine the scope of the risks and increase the success rate of moving wells.