塔东古城地区钻头优选及应用

针对大庆油田塔东区块古城地区地层含砾、岩石硬度大、85%以上井段采用牙轮钻进，导致深部地层钻速慢，钻头磨损严重等问题，在传统钻速预测方法基础上，引入钻头磨损、地层岩性、应用井深等相关参数，建立钻头破岩效率计算方法，并结合所钻遇的地层岩性、测井资料及钻头类型等，建立钻头优选模型，实现钻头选型定量化，提出了适用于古城地区的钻头序列推荐方案。现场成功应用5口井，单只钻头进尺和平均机械钻速均得到了很大的提高，实现了钻头优选提速提效的目的，为古城地区的高效钻井施工提供了重要的技术支撑。

Optimization and Application of Bit in Gucheng Region of Daqing

Poor drilling efficiency in deep formation and serious bit wearing are caused by gravel-containing formation, hard rock and roller cone drilling for more than 85% of the well sections in Gucheng region of Tadong block of Daching. Based on the traditional drilling speed prediction method, the calculation method of rock breaking efficiency is established by introducing the related parameters of bit wearing, formation lithology, well depth and so on, and based on the formation lithology, logging data and drill bit types, the optimization model of drill bit is set up to realize quantitative bit selection, bit series recommendations suitable for Gucheng region is put forward, which was successfully applied in 5 wells, the footage of single bit and the average penetration rate have been greatly improved, the bit optimization provides technical basis for efficient drilling construction in Gucheng region.