Understandings on Drilling Technology for Long Horizontal Section Wells
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摘要: 为进一步明晰长水平段水平井与大位移井及常规水平井的差异，探讨相关钻井技术发展思路，进行了长水平段水平井技术特性分析。经分析、对比，认为三者之间的主要区别为：长水平段水平井重点解决的摩阻扭矩问题在常规水平井中不突出；其主要技术目标和形态特征是“相对较长”的水平段，但很多情况下不属于大位移井定义的范畴；相关钻井技术主要关注井斜角为86°以上“长”井段的作业能力，有别于大位移井以水平位移为目标的钻井完井能力。基于上述认识，提出了可表征长水平段水平井形态特征的初步定义，并从完善钻井设计基础理论、创新长水平段提速工艺和经济钻进模式等方面给出了详细建议。Abstract: In order to further clarify the differences among long horizontal section wells,extended reach wells and conventional horizontal wells,and explore drilling technologies and relative developing strategy for long horizontal section wells,the technical characteristics of these kinds of wells were analyzed.The analysis and comparison shows the main differences among the three kinds of wells are as follows:the problem of drag and torque in long horizontal section wells is not serious in conventional horizontal wells;long horizontal section wells feature a long horizontal section,which is beyond the range of extended reach well in many cases;the relative technologies have been focused on the drilling ability for the long horizontal section with deviation of more than 86°,it is different from the drilling and completion capability in extended reach wells that aimed at getting a long displacement.Based on the findings above,preliminary definition of long horizontal section wells was presented,and some specific suggestions on basic drilling design theory,drilling technology for improving ROP of long horizontal section and economic drilling model have been proposed.
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