摘要
为提高胺类抑制剂的抑制性和抗温性,优选一种新型两亲性低分子多胺BHTA,设计页岩滚动分散实验、抑制膨润土造浆实验、粒度分布测试评价抑制性能.结果表明:BHTA抑制性优于传统的无机盐类抑制剂KCl和国外聚胺产品Ultrahib,能有效抑制黏土水化膨胀和分散,耐温性优良,可用作泥页岩水化抑制剂.采用Zeta电位测试、红外光谱分析、改性膨润土吸水实验及X线衍射分析测试黏土层间距等,探讨BHTA的作用机理,表明BHTA主要通过质子化胺基与黏土颗粒的静电作用、氢键吸附在黏土表面,以静电吸附为主,通过疏水屏蔽作用发挥抑制作用;BHTA单层吸附进入黏土层间,能最大限度降低黏土水化层间距,破坏黏土水化结构.
In order to improve the inhibitive property and high temperature resistance,a novel amphipathic low molecular weight multi-amine compound BHTA was selected as shale hydration inhibitor.The inhibitive properties were evaluated with cuttings hot-rolling dispersion test,bentonite inhibition test and particle distribution test.The results indicated that BHTA effectively suppressed clay hydration swelling and dispersion,superior to KCl and foreign polyamine product Ultrahib and resistant to high temperature,indicating that BHTA could be applied as shale inhibitor.The inhibition mechanism was investigated via zeta potential measurement,FT-IR,modified montmorillonite adsorbing water test and XRD for measuring interlayer space.The results demonstrated that the electrostatic interaction between protonated amine groups and negative clay surface,hydrogen bonding between amine group and clay surface and hydrophobic effect contributed to the inhibition,while electrostatic interaction played the leading role.BHTA was adsorbed onto the clay surface with monolayer,which reduced the interlayer space most and destroyed the hydration structure of clay.
出处
《东北石油大学学报》
CAS
北大核心
2012年第5期51-55,60,共6页
Journal of Northeast Petroleum University
基金
国家科技重大专项(2011ZX05021-004)
中国石油大学(华东)优秀博士学位论文培育计划项目(LW110202A)
中央高校基本科研专项(12CX06023A)
关键词
黏土水化
抑制剂
质子化
多胺
层间距
两亲性
低分子
clay hydration
inhibitive agent
protonation
multi-amine group
interlayer space
amphipathic
low molecular weight
