文章摘要
赵文辉.聚合物凝胶堵漏剂配方及其在高原铁路超深水平孔中的应用进展[J].地质与勘探,2024,60(3):601-609
聚合物凝胶堵漏剂配方及其在高原铁路超深水平孔中的应用进展
Progress of polymer gel plugging agent formulation and its application in ultra-deep horizontal holes of plateau railway
投稿时间:2023-08-31  修订日期:2024-02-20
DOI:10.12134/j.dzykt.2024.03.015
中文关键词: 高原铁路 线路勘察 超深水平孔 裂缝性漏失 聚合物凝胶配方 堵漏剂
英文关键词: plateau railway, line survey, ultra-deep horizontal hole, fissure leakage, polymer gel formulas, plugging agent
基金项目:中铁第一勘察设计院集团有限公司科研项目(编号:院科23KY-D006)资助
作者单位E-mail
赵文辉 陕西铁道工程勘察有限公司, 陕西西安 zwenhui1@163.com 
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中文摘要:
      高原铁路横穿藏东南缘,区域岩性复杂多变、岩体强度以及完整程度差异极大,致使线路勘察异常艰难。在开展的超深水平定向孔钻探勘察中,孔内漏失、掉块严重,严重影响钻探进度。分析认为,漏失通道大,水泥浆、PAM+SZ803高分子堵漏剂等传统堵漏材料径向渗透力弱、凝结性差和提下钻时的抽汲作用等多因素,共同导致掉块卡钻、坍塌埋钻、漏失、钻孔弯曲等井下复杂现象发生。为解决水平孔超深部裂缝性漏失问题,利用聚合物凝胶自由交联作用机理,合成一种新型聚合物凝胶堵漏剂。通过实验测试配方中交联剂、延缓剂(GH-8)、羧甲基纤维素的含量以及温度对成胶黏度、成胶时间影响,当聚乙烯醇3%、硼砂2%,羧甲基纤维素0.3%、GH-8 0.6%,交联温度30~45 ℃,成胶时间74~91 min,成胶黏度247400~254400 mPa·s,符合生产需求。承压封堵模拟实验研究表明,加入3%木屑后承压能力还可提高47%,漏失量减少30%以上。生产试验表明,本凝胶堵漏剂配方可有效解决裂隙性漏失问题,护壁效果明显,具有很好的推广应用前景。
英文摘要:
      The plateau railway crosses the southeast edge of Tibet, with complex and changeable regional lithology, and great difference in the strength and integrity of the rock bodies, which makes the line survey exceptionally difficult. In the directional drilling survey of ultra-deep horizontal hole, the significant hole leakage and falling blocks have seriously affected the drilling progress. Results show that the combination of large leakage channels, weak radial penetration of traditional plugging materials such as cement slurry, PAM+SZ803 polymer plugging agent, poor coagulation and the pumping effect when lifting and lowering the drilling, and other factors, all together led to complicated downhole phenomena such as block falling and jamming, collapsing and burying the drilling, loss of leakage, and bending of the drilling hole. In order to solve the problem of ultra-deep fracture leakage in horizontal holes, a new type of polymer gel plugging agent was synthesized by utilizing the mechanism of free cross-linking action of polymer gel. Through experiments to test the content of cross-linking agent, retarder (GH-8), carboxymethyl cellulose in the formula and the effect of temperature on the viscosity and time of gel formation, when poly(vinyl alcohol) 3%, borax 2%, carboxymethyl cellulose 0.3%, GH-8 0.6%, cross-linking temperature of 30~45 ℃, the time of gel formation of 74~91 min, the viscosity of the gel formation of 247,400~25,440 mPa·s. These indexes meet the production requirements. Pressure sealing simulation experiments show that after adding 3% wood chips, the pressure capacity can be increased by 47%, and the leakage amount can be reduced by more than 30%. Production test shows that this gel plugging agent formula can effectively solve the problem of fissure leakage, with obvious wall protection effect, indicative of a good popularization and application prospect.
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