摘要
YK5H深水平井是雅克拉凝析油气田的第一口水平井,其主力产层之一的白垩系下统卡普沙良群下段地层的显著特点是抗压强度及硬度大、岩石可钻性差、应用牙轮钻头钻进时机械钻速较低,为此该井进行了“PDC+螺杆钻具”现场试验,但在造斜钻进过程中发生螺杆落井事故,经多次打捞均未获成功。详细介绍了该井螺杆钻具落井事故的处理过程,分析了螺杆钻具打捞失败的原因,并指出应进行水平井专用打捞工具的研制及其配套工艺的研究。
Well YK5H is the first horizontal well in the Yakela condensate gas reservoir. One of the main pay zones in this reservoir, the lower Xiatongkapushaliang section of the cretaceous system, is noted by its high compressive strength find hardness, and bad drillability. Therefore, the penetrating velocity is quite low while drilling with a roller bit. In this case, ＂PDC＋dyna-drill＂ was tested in field. During build-up drilling process, the dyna-drill is twisted off and leaved at well bottom after several times fishing operations. This paper introduces in detail the down-hole trouble treatments, analyzes causes for fishing failure, anti proposes that special fishing tools and related fishing techniques for horizontal wells should be researched for similar cases.
出处
《石油钻探技术》
CAS
北大核心
2006年第5期81-82,共2页
Petroleum Drilling Techniques
