钻井液与完井液2025，Vol.42Issue(4)：462-471,10.DOI:10.12358/j.issn.1001-5620.2025.04.004
特深井钻井液微纳米有机封堵剂的研制及应用
Development and Application of Micro-Nano Organic Plugging Agent for Ultra-Deep Well Drilling Fluids
摘要
Abstract
An ultra-high temperature micro-nano organic plugging agent TSF is developed through a two-step reaction(pre-hydrolysis followed by free radical polymerization)with organic hydrolysable monomers and polymerization monomers such as AMPS,DMAA and BA.Thermogravimetric(TG)analysis shows that the initial thermal decomposition temperature of TSF is 240℃,indicating that TSF has excellent thermal stability.Before and after aging at 220℃,the particle sizes of TSF remain between 342 nm and 825 nm,indicating that TSF has dispersion stability.TSF has a glass transition temperature of 192℃,and can transform from the glassy state to the viscoelastic rubbery state,meaning that it has both plugging capacity through deformation and borehole wall strengthening capacity through adhesion.At 4%TSF treatment,a base drilling fluid,after aging at 220℃for 16 hours,can have its HTHP filter loss reduced by 43.1%,and have its HTHP filter losses tested on 5 μm and 10 μm ceramic sand discs reduced by 37.1%and 34.5%,respectively.These data show that TSF has excellent filtration control capacity through plugging.At 220℃,TSF produces no H2S,indicating that TSF has good safety performance at ultra-high temperatures.After aging at 220℃,the drilling fluid produced mud cakes whose permeability was reduced by 50.8%.Borehole wall strengthening effect through adhesion of TSF can increase the compressive strengths of core columns by 12.6-17 times,showing that TSF can enhance its ability to plug the fractures in the formations in ultra-deep wells through self-adaptability and to strengthen the borehole wall.These characteristics of TSF have been successfully applied in drilling the ultra-deep well A.关键词
特深井/钻井液/微纳米封堵剂/黏结固壁Key words
Ultra-deep well/Drilling fluid/Micro-nano plugging agent/Borehole wall strengthening through adhesion分类
能源科技引用本文复制引用
刘锋报,尹达,罗绪武,孙金声,黄贤斌,吴虹宇..特深井钻井液微纳米有机封堵剂的研制及应用[J].钻井液与完井液,2025,42(4):462-471,10.基金项目
新疆维吾尔自治区青年拔尖人才-青年科技创新人才项目"超深层抗温240℃水基钻井液体系构建"(2024TSYCCX0061). （2024TSYCCX0061）
