CAJ | 학술논문

长庆气田水平井钻进具有地层条件复杂，岩石可钻性差的特点。为探索适合长庆气田水平井提速的配套技术，从复合钻井工艺、钻井液体系性能、防托压和事故复杂预防4个方面进行了生产应用。实践表明，高效PDC钻头配合螺杆复合钻井可显著提高机械钻速，缩短建井周期；膨润土、聚合物和聚磺钻井液体系可通过控制钻井液性能参数防止不同井段的地层漏失、坍塌，并满足钻具润滑要求；采用倒装钻具组合和应用水力加压器可减小钻具摩阻，减缓托压现象，从而提高滑动钻进速度；此外，应做好井下复杂事故的防治方案并在施工中严格执行。该配套工艺可为长庆地区同类结构水平井钻进提供参考，对提高勘探开发效益具有重要意义。
장경기전수평정찬진구유지층조건복잡，암석가찬성차적특점。위탐색괄합장경기전수평정제속적배투기술，종복합찬정공예、찬정액체계성능、방탁압화사고복잡예방4개방면진행료생산응용。실천표명，고효PDC찬두배합라간복합찬정가현저제고궤계찬속，축단건정주기；팽윤토、취합물화취광찬정액체계가통과공제찬정액성능삼수방지불동정단적지층루실、담탑，병만족찬구윤활요구；채용도장찬구조합화응용수력가압기가감소찬구마조，감완탁압현상，종이제고활동찬진속도；차외，응주호정하복잡사고적방치방안병재시공중엄격집행。해배투공예가위장경지구동류결구수평정찬진제공삼고，대제고감탐개발효익구유중요의의。
Drilling of horizontal wells in Changqing Gasifeld is characterized by complex formation conditions and poor rock drillability. To explore the matching technology for speeding up the horizontal well drilling in this area, the compound drilling technology, mud properties, prevention of backing pressure and preventing of complex conditions and accidents were applied in ifeld drilling practices. The practices indicated that high efifciency polycrystalline diamond compact (PDC) bit and screw compound drilling can improve rate of penetration signiifcantly and reduce well construction period. By controlling mud properties, the bentonite, polymer and sulphonated polymer drilling lfuid systems can prevent the formation leakage and collapse at different intervals and can satisfy the lubrication requirement of drill string. Method of inverted drill string and application of hydraulic thruster can decrease frictional resistance of the drill string so as to mitigate backing pressure and improve ROP of slide drilling. Besides, plans to prevent complex conditions and accidents should be developed and executed strictly during drilling. This matching technology provides a reference for the horizontal well drilling with similar well structures in Changqing area, which is of great signiifcance to improvement of exploration and development beneift.