钻探工程2026，Vol.53Issue(2)：68-76,9.DOI:10.12143/j.ztgc.2026.02.007
面向能源地质钻探孔隙地层的剪切增稠流体封堵机理研究
Research on the plugging mechanism of shear thickening fluid in porous formations for energy geological drilling
摘要
Abstract
To address the challenges of lost circulation control in porous formations during unconventional geo-energy drilling,as well as the shortcomings of traditional plugging materials such as poor adaptability and difficult performance control,a shear thickening fluid(STF)was prepared using nano-SiO2 as the dispersed phase and polyethylene glycol as the continuous phase.Experiments were conducted using an API static plugger and marble beds to simulate porous formations,systematically investigating the influence mechanisms of three key parameters-critical shear rate,shear thickening intensity,and shear thickening ratio-on the plugging performance of STF.The results indicate that the critical shear rate dominates the pressure response characteristics and the timing of thickening triggering.Within the marble bed pore size range of 0.15～1.66 mm,samples with a lower critical shear rate readily triggered the thickening effect under low pressure,reducing the leakage rate to below 2 mL/min.The shear thickening intensity determines the compactness and ultimate pressure-bearing capacity of the plugging layer;samples with high shear thickening intensity achieved a minimum leakage rate of 0.38 mL/min and maintained excellent plugging effectiveness even under high pressure.The shear thickening ratio affects the stability of the plugging morphology and pressure sensitivity.A high shear thickening ratio facilitated the formation of effective"throat-plugging"or"waist-plugging"structures,reduced a low leakage rate of 1.71 mL/min at pressures exceeding 3.0 MPa and demonstrating good pressure-bearing capacity.This study reveals the mechanisms by which the core thickening parameters of STF affect pore plugging performance,providing theoretical support and a technical basis for its engineering application in porous lost circulation formations.关键词
剪切增稠流体/孔隙地层/堵漏机理/临界剪切速率/剪切增稠强度/剪切增稠比/纳米SiO2/智能材料/能源钻采Key words
shear thickening fluid/porous formation/plugging mechanism/critical shear rate/shear thickening intensity/shear thickening ratio/nano-SiO2/smart material/energy drilling and extraction分类
天文与地球科学引用本文复制引用
黄小程,孙平贺,王亮,夏余宏烨,邓盈盈,李嘉雪,张绍和..面向能源地质钻探孔隙地层的剪切增稠流体封堵机理研究[J].钻探工程,2026,53(2):68-76,9.基金项目
国家自然科学基金面上项目"剪切感知微粒流体对HDD高渗地层泥饼生长与增效机制研究"(编号:42172346) （编号:42172346）
中南大学研究生自主探索创新项目(编号:1053320241405) （编号:1053320241405）
