钻井液与完井液2025，Vol.42Issue(3)：290-295,6.DOI:10.12358/j.issn.1001-5620.2025.03.002
钻井液用无荧光柔性封堵剂的制备及性能
Preparation and Properties of a Drilling Fluid Non-Fluorescent Flexible Plugging
摘要
Abstract
As flexible plugging agents used in drilling fluids,gel plugging agents have great effects on the rheology of the drilling fluids,and asphalt plugging agents have fluorescent effect that interferes with mud logging data acquisition.To solve these problems,a water-based polyurethane emulsion plugging agent SMPU-1 has been prepared with the following monomers:isophorone diisocyanate(IPDI),polytetramethylene ether glycol(PO3G),2-hydroxyethyl disulfide(HEDS)and dimethylol butyric acid(DMBA)as the chain extenders,dibutyltin dilaurate(DBTDL)as the catalyst,furfuryl alcohol(FA)as the end-capping agent,and triethylamine(TEA)as the emulsifier.Using IR spectrometer,laser particle size analyzer and scanning electron microscope,the molecular structure of SMPU-1 was characterized,and the particle size distribution and the micromorphology of SMPU-1 analyzed.It was found that under the action of high temperature,the SMPU-1 particles are still in nano-micron monodisperse state,and become soft and deformed.Under the action of pressure,the SMPU-1 particles can be squeezed into and hence densely plug the micro-fractures on the surfaces of rocks.The results of the plugging performance test show that the optimum temperature for the SMPU-1 particles to function is 140℃ or lower,and the optimum treatment of SMPU-1 is 4％.SMPU-1 has little effect on the rheology of drilling fluids.At the maximum applicable work temperature and the optimum dosage,the API filter loss of a drilling fluid is 6.2 mL,and the high temperature high pressure(HTHP)filter loss is 16 mL,indicating that the drilling fluid still has good filtration and wall-building properties.关键词
钻井液/井壁稳定/柔性封堵剂/聚氨酯/无荧光/软化变形Key words
Drilling fluid/Borehole wall stabilization/Flexible plugging agent/Polyurethane/Non-fluorescence/Softening deformation分类
能源科技引用本文复制引用
褚奇,穆国臣,葛春梅,张天笑,杨铭,刘聪..钻井液用无荧光柔性封堵剂的制备及性能[J].钻井液与完井液,2025,42(3):290-295,6.基金项目
中国石化科技部科研攻关项目"环境响应自适应封堵防塌钻井液体系研究"(P24236). （P24236）
