中文摘要：

基于仿生技术,模仿海洋生物贻贝分泌的贻贝蛋白具超强黏附性能的特点,合成了仿生固壁剂GBFS-1和仿生页岩抑制剂YZFS-1,并以这2种仿生处理剂为核心,研制了可有效加固井壁并维持井壁稳定的仿生钻井液体系。2种仿生处理剂的性能评价结果表明：GBFS-1具有良好的降滤失性能,且在井壁岩石表面形成的仿生壳能胶黏岩石,胶黏能力强于常见的市售胶黏剂;YZFS-1具有良好的抑制页岩水化膨胀和分散、剥落的能力,抑制效果优于目前国内常用的页岩抑制剂,且有良好的造浆抑制能力。通过处理剂配伍性评价和加量优化,确定了仿生钻井液体系的配方,对其性能进行了评价并与现场应用的某种防塌钻井液体系进行了对比,结果表明：仿生钻井液体系各项基本性能良好,且能有效抑制页岩水化膨胀和分散剥落,总体上优于对比钻井液体系。

英文摘要：

Based on biomimetic technology, wellbore strengthener GBFS-1 and shale inhibitor YZFS-1 were synthesized imitating the mussel protein which has super adhesion. A new drilling fluid system centering on the two biomimetic agents was designed and prepared in order to enhance the strength of shale rocks near wellbore and maintain wellbore stability. Various inhibition evaluation tests show that YZFS-1 can strongly inhibit clay hydrated swelling and the resulting shale dispersion, due to the adsorption and self-polymerization of YZFS-1 molecules in the interlayer of clay. Besides the ability of controlling fluid loss, GBFS-1 can also adhere to shale rock, produce dense and water impermeable biomimetic shell that has relative strong cohesion strength after spontaneous cure. The shear strength tests show that the shear strength of two shale pieces glued together by the biomimetic shell in aqueous environment is obviously stronger than glued by several commonly-used binders. Through compatibility evaluation and dosage optimization of the additives, the formula of biomimetic drilling fluid was established, and its performance was evaluated and compared with another anti-caving drilling fluid. The results show the biomimetic drilling fluid is better in all basic performances than the anti-caving drilling fluid on the whole, and can effectively inhibit shale swelling and dispersion.