摘要
新疆玉北地区古生界沙井子组地层埋深4000 m以上,岩石强度高;加之泥质岩含量高、塑性强,地层可钻性较差,提速困难。前期实践表明,沙井子组高塑性地层牙轮钻头的纵向冲击压碎破岩效果不佳,常规PDC钻头钻井反扭矩大,易产生“黏滑”现象,破岩效率低。为提高机械钻速,降低钻井综合成本,引入了国外的新型钻井提速工具--TorkBuster扭力冲击器,并通过匹配个性化PDC钻头、提高钻井液排量、合理控制钻压等配套技术措施,大幅度地提高了平均机械钻速。“PDC钻头+螺杆钻具”、“孕镶PDC石钻头+涡轮钻具”和“PDC钻头+扭力冲击器”3种钻井工艺的现场试验结果表明,扭力冲击器提速效果明显,平均机械钻速为6.42 m/h,与前期相比机械钻速提高了2~3倍。扭力冲击器钻井克服了深井高强度塑性地层的钻井难题,可进一步推广应用。
Due to the great burying depth, larger than 4000m, and hard Shajingzi formation with strong abrasiveness and poor drill-ability in Yubei area of Xinjiang Province, it is hard to speed up drilling operation, Previous practice shows that the cone bits have a poor impact on the Shajingzi formation and the conventional PDC bit has high anti-torque, so it is easy to produce“stick-slip”phenomenon. Finally, the rock breaking is inefifcient. In order to improve the penetration rate and reduce the cost, TorkBuster torsion impact generator with a personalized PDC bit is recommended. The three drilling technologies,"PDC bit+screw drill tool","diamond bit+turbine tool"and"torsion impact generator+PDC bit”, are discussed in the paper. The results show that torsion impact generator is more effective than other drilling technologies, with the average rate up to 6.42m/h, 200%-300%higher than earlier stage. The torsion impact generator overcomes the deep drilling problems in the high-strength plastic formations. It should be widely applied.
出处
《石油钻采工艺》
CAS
CSCD
北大核心
2013年第5期132-136,共5页
Oil Drilling & Production Technology
基金
国家自然科学基金(编号:51004084)
高等学校博士学科点专项科研基金(编号:20105121120002)联合资助
关键词
深井提速
扭力冲击器
PDC钻头
钻井参数
现场试验
deep well drilling speed improvement
torsion impact generator
PDC bit
drilling parameter
field testing