裸眼侧钻技术在川马页1井的应用实践

Application of open hole sidetracking technology in Well Chuanmaye 1

摘要:

川马页1井为部署在四川省马边地区的一口页岩气参数井，该井在钻进至3437.58 m时出现井内复杂，在第一阶段处理无果后对其进行了注水泥封井。针对川马页1井的复杂情况，提出了三开裸眼段侧钻方案。在分析了近钻头位置侧向力影响因素的基础上，结合实际情况优选了侧钻点、侧钻方式和侧钻钻具组合，确定了侧钻技术措施。经过2次侧钻施工，克服了邻井资料缺乏、侧钻深度大、地层复杂易垮塌、侧钻井段井温高、地层强度高、原井眼井斜小、侧钻方位限制等施工难点，最终侧钻出新井眼并钻达预定井深。为该地区后续钻井施工与复杂处理提供了借鉴。

Abstract:

Well Chuanmaye 1 is a shale gas parameter well deployed in Mabian， Sichuan. When drilling to 3437.58m， there were drilling complexs and sealed with cement after the first stage of treatment was unsuccessful. This article proposes a three hole open hole section sidetracking technology scheme for the complex situation of Well Chuanmaye 1. Based on the analysis of the factors affecting the sidetracking force near the drill bit position， combined with the actual situation， the sidetracking point， sidetracking method， and sidetracking tool combination were optimized， and the sidetracking technical measures were determined. After two rounds of sidetracking construction， the construction difficulties such as lack of adjacent well data， large sidetracking depth， complex formation prone to collapse， high temperature and formation strength in the sidetracking section， small inclination of the original wellbore， and limited sidetracking direction were overcome. Finally， a new wellbore was drilled and reached the predetermined depth. Provided reference for subsequent drilling construction and complex treatment in the region.