水平井井眼轨迹整体性评价的一种新方法
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摘要
针对目前水平井实钻井眼轨迹整体性评价方法少、缺少定量化评价手段的问题,通过全井段差异化空间扫描技术,优选轨迹评价参数,从空间距离变化方面得到消除井深影响的距离差异向量,从空间方位变化方面得到消除累积误差影响的方向差异向量,最终构成评价实钻井眼轨迹整体性的二维特征向量,从而量化实钻井眼轨迹相对于设计井眼轨道的波动程度。延平1井实例计算表明,通过角度和距离差异的二维特征向量,准确量化得到了延平1井实钻轨迹与设计轨道的整体符合率为84.11%;在延长油气田现有技术条件下,以二倍均值作为实钻轨迹优劣井段的判别标准,准确识别出延平1井在440～690m、860～1 190m井段实钻井眼轨迹质量差。该方法为水平井井眼轨迹整体性评价提供了一种新的思路。
To ensure the quality of borehole,there is an urgent need to overall evaluate the real drilling trajectory and the borehole trajectory design in scientific and reasonable way.By optimizing trajectory evaluation parameters of well distance and angle changes,based on the trajectory design,used the different scanning technology to get the two-dimensional vector of angle difference and well distance difference of the real drilling trajectory and the trajectory design to simulate the change of the well trajectory.Calculation results of well Yanping-1 showed that the angle difference vector and well distance difference vector can accurately judge the changes between the real drilling trajectory and the trajectory design,the whole coincidence rate of well Yanping-1 is 84.11%,and effectively find the poor interval section,which is section 440～690 m、860～1 190 mof well Yanping-1.This method provides a new way to overall evaluate the horizontal well trajectory.
To ensure the quality of borehole,there is an urgent need to overall evaluate the real drilling trajectory and the borehole trajectory design in scientific and reasonable way.By optimizing trajectory evaluation parameters of well distance and angle changes,based on the trajectory design,used the different scanning technology to get the two-dimensional vector of angle difference and well distance difference of the real drilling trajectory and the trajectory design to simulate the change of the well trajectory.Calculation results of well Yanping-1 showed that the angle difference vector and well distance difference vector can accurately judge the changes between the real drilling trajectory and the trajectory design,the whole coincidence rate of well Yanping-1 is 84.11%,and effectively find the poor interval section,which is section 440～690 m、860～1 190 mof well Yanping-1.This method provides a new way to overall evaluate the horizontal well trajectory.
引文
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[2]李伟峰,赵习森,于小龙,等.延长油田特殊地貌条件下水平井钻井技术难点与对策[J].非常规油气,2017,4(4):102-106.
[3]李闯.国内页岩气水平井钻完井技术现状[J].非常规油气,2016,3(3):106-110.
[4]吴爽,李戮,张众.大位移井技术研究的现状分析[J].石油钻探技术,2002,30(5):17-19.
[5]杨全枝,张晓斌,吴迪,等.延长油田丛式井网加密水平井直井段交碰风险量化分析[J].石油钻采工艺,2017,39(3):298-302.
[6]杨全枝,于小龙,马振锋,等.延长油田浅层高密井网水平井防碰绕障技术[J].探矿工程(岩土钻掘工程),2016,43(1):40-43.
[7]杨飞,李琪,张冰.钻井井身质量评价方法研究及软件实现[J].石油工业技术监督,2008,24(11):18-20.
[8] LIU X S.Average borehole curvature calculation of hole trajectory[J].Oil Drilling&Production Technology,2005,27(5):11-15.
[9] LIU X S.New technique calculates borehole curvature,torsion[J].Oil&Gas Journal,2006,104(40):41-49.
[10] FITCHARD E E,FITCHARD S A.The effect of torsion on borehole curvature[J].Oil&Gas Journal,1983,81(3):121-124.
[11]闫吉曾,梁文龙,屈玉凤,等.一种实钻井眼轨迹与设计轨道符合率的评价方法:201510890746.9[P].2015-12-07.
[12]申峰,杨全枝,于小龙,等.一种实钻井眼轨迹整体性评价方法:201710657453.5[P].2017-08-03.
[13]刘修善,岑章志.井眼轨迹间相互关系的描述与计算[J].钻采工艺,1999,22(3):7-12.
[14] STAGG T O,REILEY R H.Watchdog:An anti-collision wellhead monitoring system[C].SPE 22123:1991.