钻探工程2024，Vol.51Issue(5)：68-76,9.DOI:10.12143/j.ztgc.2024.05.008
剪切增稠流体对裂隙地层的封堵特性试验研究
Experimental study on the sealing characteristics of fractured formation by shear thickening fluid
摘要
Abstract
The fracture leakage channel in fractured formation usually has multi-scale characteristics and uncertainty.The drilling fluid leakage problem is particularly prominent in the construction of geological drilling in fractured formation.Shear Thickening Fluid(STF),as a new type of intelligent material,has excellent properties such as self-sensing,self-adaptation and self-repair,and has been widely used in many fields.In this study,shear thickening fluid was used as a plugging material,and the plugging characteristics of shear thickening fluid were investigated under different dispersed phase concentrations(56.9vol%,59.2vol%and 61.7vol%),slit widths(1,2,3,4,5mm)and pressure conditions through the plugging test of API plugging instrument.The plugging test results show that the amount of leakage increases with the increase of seam width and time.When the concentration of nano silica increases in the range of 56.9%～61.7%,the leakage rate will be reduced and the effect of the gap width on the leakage rate will be weakened.When the leakage pressure is 0 MPa,the shear thickening fluid does not produce thickening effect,but leaks out from the seam in the form of liquid.When the pressure increases slightly,the thickening effect will be stimulated,and agglomeration particles will be generated to seal the seam pipe and reduce the leakage rate.When the pressure further increases beyond the bearing capacity of the sealing layer,the shear-thickening fluid is extruded out of the fracture in a plate form.The application of shear-thickening fluid in plugging field is expected to provide innovative solutions for plugging in fractured formation.关键词
剪切增稠流体/纳米SiO2/智能材料/堵漏试验/裂缝封堵Key words
shear thickening fluid/nano-silica/smart material/plugging test/crack plugging分类
地质学引用本文复制引用
邓盈盈,孙平贺,夏余宏烨,徐勇,蒲英杰,张鑫鑫,张晨,张航盛,张绍和..剪切增稠流体对裂隙地层的封堵特性试验研究[J].钻探工程,2024,51(5):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:2024ZZTS0397) （编号:2024ZZTS0397）
