井眼测量误差椭球最小间距计算方法

发布时间：2018-06-06 04:07

本文选题：丛式井 + 井眼防碰　；参考：《石油学报》2017年11期

【摘要】：随着丛式井和加密井在油田的广泛应用,对井眼防碰分析提出了更高的要求。井眼分离系数是防碰分析的一个常用指标,然而不同误差椭球分离距计算方法导致结果差异较大,为此提出测量误差椭球最小间距计算新方法,以更好地满足应用需要。在坐标变换及误差椭球计算基础上,推导了中心向量法误差椭球分离距计算公式,进而应用最优化理论求解了两误差椭球最小间距,并研究了快速求解策略,可精确、快速地计算井眼分离系数。算例分析表明,与其他计算方法相比,新方法能更好地指导井眼防碰风险评价工作,在丛式井设计和定向钻井中具有应用价值。
[Abstract]:With the wide application of cluster wells and infill wells in oil fields, higher requirements are put forward for hole collision prevention analysis. Borehole separation coefficient is a commonly used index for anti-collision analysis. However, the calculation results of different error ellipsoid separation distance are quite different. Therefore, a new method for calculating the minimum spacing of measuring error ellipsoid is proposed to better meet the needs of application. On the basis of coordinate transformation and error ellipsoid calculation, the formula for calculating the separation distance of error ellipsoid by the center vector method is derived, and the minimum distance between two ellipsoids is solved by using optimization theory. The wellbore separation coefficient is calculated quickly. The analysis of examples shows that the new method can better guide the evaluation of hole collision prevention risk compared with other calculation methods and has application value in the design of cluster wells and directional drilling.
【作者单位】：北京航空航天大学自动化科学与电气工程学院;中国石油集团钻井工程技术研究院;
【基金】：中国石油集团公司科技项目(2013E-3801、2014A-4215)资助
【分类号】：TE21

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