水基钻井液防泥包润滑剂的性能评价与机理分析Performance and Effect Mechanism Analysis of Mud Bag Prevention Lubricant in Water-based Drilling Fluid
于洪江,张美画,杜春保,高明慧,常紫汐
摘要(Abstract):
制备了防泥包润滑剂FNBJ,研究了FNBJ的润滑性、耐温性、防泥包性和缓蚀性。结果表明,在水基钻井液中加入质量分数1.0%的FNBJ可使润滑系数降低率达到89.2%;FNBJ具有较好的耐温性,在180℃下热滚16 h,摩阻系数为0.066 0;当FNBJ质量分数为1.5%时,防泥包效果显著,泥包黏土量降低率达96.1%。此外,在90℃下,FNBJ的缓蚀效率达95.0%。FNBJ具有较低的表面张力,FNBJ分子中的极性基团易吸附在钻头表面,非极性疏水链段排列在外形成疏水油膜,从而提高钻井液的润滑性,达到防泥包的目的。
关键词(KeyWords): 水基钻井液;润滑剂;防泥包;润滑系数;耐温;油膜
基金项目(Foundation): 西安石油大学研究生创新与实践能力培养计划项目“抗温抗盐改性淀粉降滤失剂的研究”(YCS19213133)
作者(Author): 于洪江,张美画,杜春保,高明慧,常紫汐
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