长水平段水平井靶区多控制点轨道优化设计方法  

Optimization of borehole trajectory with multi-control points for long lateral section horizontal wells

作　　者：孔德林[1] 李黔[1] 

机构地区：[1]西南石油大学,四川成都610500

出　　处：《中国海上油气》2016年第5期92-97,共6页China Offshore Oil and Gas

基　　金："十二五"国家科技重大专项"钻井工程设计与工艺软件(编号:2011ZX05021-006)";中国石油天然气集团公司科学研究与技术开发项目"钻井工程设计与控制一体化软件V2.0升级版开发(编号:2014B-4316)"部分研究成果

摘　　要：试算法设计的多控制点水平井轨道造斜段多、轨迹控制作业难度大,不利于快速钻井。结合水平井"PDC钻头+弯外壳螺杆钻具"复合钻快速钻井特点,提出了长水平段水平井靶区多控制点轨道优化设计方法,即先用直线间隔连接控制点得到控制单元,再通过选择适当曲线连接相邻控制单元形成二维或三维控制单元体。实例计算结果表明,本文提出的优化设计方法设计的靶区多控制点水平井轨道稳斜段总进尺长,三维水平井轨道可在装置角保持不变的情况完成轨迹控制作业,有利于复合钻快速钻井和提高作业效率。Trajectories of horizontal wells with multi-control points designed by the trial method have many building sections, is difficult to control and not conducive to fast drilling. Therefore, based on the characteristics of the combination of ＂PDC bit ＋ bent-housing positive displacement motor＂, a design method for optimized trajectory with multi-control points for long lateral section horizontal wells was proposed. In this method, the control points are linked by straight lines to generate control segments, then an appropriate curve is selected to connect the adjacent segments, which is called two-dimensional or three-dimensional control segment. An example of application shows that the total length of holding section by the proposed design method is much longer. Moreover, with the 3D trajectory designed by this method, tool face angle can be kept constant while deflecting, which facilitates the implementation of compound drilling technology and enhances drilling efficiency.

关 键 词：长水平段 水平井 靶区 多控制点 控制单元 轨道设计 

分 类 号：TE243.1[石油与天然气工程—油气井工程]