纪照生,袁国栋,晁文学,等. 塔里木盆地超深小井眼定向钻井提速提效关键技术[J]. 石油钻探技术,2024,52(0):1-7. DOI: 10.11911/syztjs.2024064
引用本文: 纪照生,袁国栋,晁文学,等. 塔里木盆地超深小井眼定向钻井提速提效关键技术[J]. 石油钻探技术,2024,52(0):1-7. DOI: 10.11911/syztjs.2024064
JI Zhaosheng, YUAN Guodong, CHAO Wenxue, et al. Key Technology for Speeding up and Improving Efficiency of Ultra-Deep Slimhole Directional Drilling in Tarim Basin[J]. Petroleum Drilling Techniques, 2024, 52(0):1-7. DOI: 10.11911/syztjs.2024064
Citation: JI Zhaosheng, YUAN Guodong, CHAO Wenxue, et al. Key Technology for Speeding up and Improving Efficiency of Ultra-Deep Slimhole Directional Drilling in Tarim Basin[J]. Petroleum Drilling Techniques, 2024, 52(0):1-7. DOI: 10.11911/syztjs.2024064

塔里木盆地超深小井眼定向钻井提速提效关键技术

Key Technology for Speeding up and Improving Efficiency of Ultra-Deep Slimhole Directional Drilling in Tarim Basin

  • 摘要: 针对塔里木盆地台盆区超深小井眼定向钻井机械钻速低、钻头寿命短、常规螺杆钻具脱胶脱扣、钻井液稳定性差以及产层喷漏同存等难题,研究形成了塔里木盆地超深小井眼定向钻井提速提效关键技术:以标准行程钻速和钻头进尺为指标,采用统计分析法优选适用目的层的ϕ149.2 mm和ϕ165.1 mm KS1352DGRX型钻头,ϕ120.7 mm KDM1062TR型钻头;对比国内外抗高温螺杆现状,确定了井底温度低于180 ℃推荐使用国产抗高温螺杆,否则推荐使用全金属螺杆或进口耐高温螺杆的方案;采用理论分析结合数值模拟的方法,优化设计了小尺寸降摩减阻工具并优化了工具安防位置;优选抗盐高温高压降滤失剂和抑制剂,研选除氧剂等,制定合理的pH调控和钙离子补充措施,配伍形成了抗温200 ℃钻井液体系;分析了顺北油气田产层钻进喷漏同层的特点,确定了“降密度+井口控压+优化排量”的井控基本原则。塔里木盆地超深小井眼定向钻井提速提效关键技术现场应用5口井,小井眼段平均机械钻速提高113.24%,平均井径扩大率5.57%,平均钻井周期缩短35.03%,均未发生井下故障和复杂情况。该技术为塔里木盆地超深小井眼定向钻井提供了支撑。

     

    Abstract: In view of the problems such as low penetration rate, short bit life, degumming and tripping of conventional screw drilling tools, poor stability of drilling fluid, and simultaneous occurrence of blowout and leakage in pay zones in ultra deep slim hole directional drilling in the platform basin area of the Tarim Basin, scientific research has formed the key technology for speed and efficiency improvement in ultra deep slim hole directional drilling in the Tarim Basin. Using standard stroke penetration rate and bit footage as indicators, statistical analysis method is used to select bit KS1352DGRX with a diameter of ϕ149.2 mm and ϕ165.1 mm and bit KDM1062TR with a diameter of ϕ120.7 mm applicable to the target layer; Comparing the current situation of high-temperature resistant screws at home and abroad, it has been determined that domestic high-temperature resistant screws are recommended for bottomhole temperatures below 180 ℃. Otherwise, it is recommended to use all metal screws or imported high-temperature resistant screws; We optimized the design of small-sized friction and drag reduction tools using theoretical analysis combined with numerical simulation methods, and optimized the tool's security position; Optimal selection of salt resistant, high-temperature, and high-pressure filtration loss reducing agents and inhibitors, research and selection of deoxidizers, formulation of reasonable pH control and calcium ion supplementation measures, and compatibility to form a temperature resistant 200 ℃ drilling fluid system; Analyzed the characteristics of drilling and leakage in the same layer of Shunbei Oilfield in the Northwest Work Area, and determined the basic principle of well control of "density reduction + wellhead pressure control + optimized displacement". The key technology of ultra-deep slim hole directional drilling in the Tarim Basin for speed and efficiency improvement was applied in five wells. The average ROP of the slim hole section was increased by 113.24%, the average hole diameter expansion rate was 5.57%, and the average drilling cycle was shortened by 35.03%. None of the wells had complex time effect failures.

     

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