东营凹陷中央隆起带北部深层钻井技术难点与对策

东营凹陷中央隆起带北部深层钻井存在地层倾角大、地层岩石可钻性差、钻头选型困难、盐膏层发育、地层压力系统复杂、地层温度高等技术难点，导致机械钻速低、钻井周期长。为此，胜利油田提出了以下技术对策:开展地层岩石可钻性研究，优选钻头；利用“PDC钻头＋螺杆钻具”进行复合钻进；进行旋冲钻井技术、井底涡轮增压钻具配合超高压射流钻头钻井试验；推广应用气体钻井技术；优选钻井液体系。现场应用和试验结果表明，所提出的技术对策可行、有效，并在应用和试验过程中形成了东营北带深部地层钻井提速配套技术。 

Difficulties and Countermeasures of Deep Drilling Technology in North Central Uplift of Dongying Sag

Low penetration rate and long drilling cycle in north part of central uplift belt of Dongying sag are caused by large formation dip,poor drillability,bit selection,salt gypsum beds,complex pressure system and high formation.Technical strategies are introduced as follows,research on rock drillability,bit optimization,using PDC bit+PDM,using rotary impact drilling technology,using downhole turbocharged drilling assembly and ultra-high pressure jet bit,gas drilling,and drilling fluid optimization.Field applica...