新型聚胺页岩抑制剂特性及作用机理

doi:10.7623/syxb201104017

石油学报 ›› 2011, Vol. 32 ›› Issue (4): 678-682.DOI: 10.7623/syxb201104017

新型聚胺页岩抑制剂特性及作用机理

邱正松钟汉毅黄维安

中国石油大学石油工程学院山东青岛 266555

收稿日期:2010-10-08 修回日期:2011-01-24 出版日期:2011-07-25 发布日期:2011-09-22
通讯作者: 邱正松
作者简介:邱正松，男，1964年8月生，2001年获中国石油大学（华东）博士学位，现为中国石油大学（华东）石油工程学院副院长、教授、博士生导师，主要从事井壁稳定理论及应用、钻井液处理剂研发、油气层保护等教学科研工作。
基金资助:
国家自然科学基金项目（No-41072094）资助。

Properties and mechanism of a new polyamine shale inhibitor

QIU Zhengsong ZHONG Hanyi HUANG Wei’an

Received:2010-10-08 Revised:2011-01-24 Online:2011-07-25 Published:2011-09-22

摘要/Abstract

摘要：

通过抑制膨润土造浆、屈曲硬度、耐崩散等新型实验方法，评价了新型聚胺页岩抑制剂SDA的抑制特性。结果表明，SDA的抑制性优于传统抑制剂KCl，并与国外同类产品Ultrahib相当。借助FT-IR、XRD、Zeta电位测试等实验分析手段，深入探讨了聚胺的强抑制作用机理。研究表明，低分子聚胺进入黏土层间后，解离出的铵离子交换出层间水化阳离子，通过静电作用中和黏土晶层表面负电荷，降低黏土层间水化斥力；同时聚胺与黏土层间硅氧烷基形成氢键，进一步强化其在黏土表面的吸附，二者共同作用将相邻黏土片层束缚在一起，抑制黏土水化膨胀；聚胺吸附在黏土晶层表面之后，其分子结构中聚氧丙烯疏水部分覆盖在黏土表面，使黏土亲水性减弱，进一步抑制黏土水化。

关键词: 聚胺页岩抑制剂, 抑制性, 屈曲硬度, 质子化, 亲水性

Abstract:

Inhibitive properties of a newly developed polyamine shale inhibitor (SDA) were evaluated by means of novel testing methods, such as mud-making inhibition of bentonite, buckling hardness and slake durability. The results indicate that highly inhibitive SDA is superior to the conventional inhibitor (KCl) and equivalent to a foreign product (Ultrahib). The inhibition mechanism of this polyamine was thoroughly studied by FT-IR, XRD, Zeta potential measurement analyses. The results demonstrate that when low molecule weight polyamine enters into clay interlayers, dissociated ammonium ions may exchange hydration cationic ions from interlayers and reduce hydration repulsion by neutralizing negative charges on the intermicellar surface. Meanwhile, hydrogen bonds formed between polyamine molecules and oxygen atoms on the siloxane surface in tetrahedral layers of the clay sheet intensify adsorption further. Both electrostatic attraction and hydrogen bonds jointly bind the adjacent clay sheets together and inhibit the clay from hydration and swelling. Moreover, when adsorption occurs, hydrophobic polyoxypropylene chains of the polyamine cover the clay surface and render the clay more hydrophobic, which may further inhibit the clay from hydration.

Key words: polyamine shale inhibitor, inhibition, buckle hardness, protonation, hydrophilicity

邱正松钟汉毅黄维安. 新型聚胺页岩抑制剂特性及作用机理[J]. 石油学报, 2011, 32(4): 678-682.

QIU Zhengsong ZHONG Hanyi HUANG Wei’an. Properties and mechanism of a new polyamine shale inhibitor[J]. Editorial office of ACTA PETROLEI SINICA, 2011, 32(4): 678-682.

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新型聚胺页岩抑制剂特性及作用机理

Properties and mechanism of a new polyamine shale inhibitor

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