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一种新型油井水泥两性复合高温缓凝剂的合成及缓凝机理研究

Synthesis and retarder mechanism study of a novel amphoteric composite high temperature-resistant retarder for oil well cement.

作者信息

Zhigang Peng, Jian Zhang, Qian Feng, Changjun Zou, Yong Zheng, Bojian Zhang, Jinhua Huo

机构信息

The School of Chemistry and Chemical Engineering, Southwest Petroleum University 610500 Sichuan China

出版信息

RSC Adv. 2018 Apr 19;8(27):14812-14822. doi: 10.1039/c8ra01139g. eCollection 2018 Apr 18.

DOI:10.1039/c8ra01139g
PMID:35541348
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9079965/
Abstract

An amphoteric composite polymer (hereinafter referred to as PAADM) as a high temperature-resistant cement retarder was prepared by intercalated polymerization method with 2-crylamido-2-methylpropanesulfonic acid (AMPS), acrylic acid (AA) and two diallyl dimethyl ammonium chloride (DMDAAC) as monomers, and modified montmorillonite as an active polymerization filler. The synthetic composite polymer was characterized by Fourier transform infrared spectroscopy (FT-IR), H nuclear magnetic resonance (H-NMR), X-ray diffraction (XRD) and thermogravimetric analysis (TGA). The results of the aforementioned characterization showed that the synthesized copolymer (PAADM) has an intercalation/exfoliation composite structure and excellent thermal stability. Performance evaluation evidenced that the cement slurry containing PAADM has good retarding property in the range of 120-200 °C, and demonstrated the rapid development of compressive strength under high temperature and low temperature conditions, this property could guarantee that the retarder PAADM could be applied to the construction of deep wells and long interval wells. Moreover, the retarding mechanism of PAADM was studied through calcium binding capacity, adsorption amount, zeta potential, XRD and SEM analysis, and it was found that "adsorption deposition" and "calcium complexation" should be responsible for this retarder delaying the hydration process of cement grains.

摘要

以2-丙烯酰胺基-2-甲基丙磺酸（AMPS）、丙烯酸（AA）和二烯丙基二甲基氯化铵（DMDAAC）为单体，采用插层聚合法，以改性蒙脱土为活性聚合填料，制备了一种耐高温水泥缓凝剂两性复合聚合物（以下简称PAADM）。采用傅里叶变换红外光谱（FT-IR）、氢核磁共振（H-NMR）、X射线衍射（XRD）和热重分析（TGA）对合成的复合聚合物进行了表征。上述表征结果表明，合成的共聚物（PAADM）具有插层/剥离复合结构和优异的热稳定性。性能评价表明，含PAADM的水泥浆在120-200℃范围内具有良好的缓凝性能，在高温和低温条件下均表现出抗压强度的快速发展，这一性能可以保证缓凝剂PAADM能够应用于深井和长间隔井的施工。此外，通过钙结合能力、吸附量、zeta电位、XRD和SEM分析研究了PAADM的缓凝机理，发现“吸附沉积”和“钙络合”是该缓凝剂延缓水泥颗粒水化过程的原因。

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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ce1e/9079965/13d5d3f18bd0/c8ra01139g-f8.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ce1e/9079965/5405bb150554/c8ra01139g-f11.jpg
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本文引用的文献

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Self-healable, tough, and ultrastretchable nanocomposite hydrogels based on reversible polyacrylamide/montmorillonite adsorption.基于可逆聚丙烯酰胺/蒙脱土吸附的自修复、坚韧和超拉伸纳米复合水凝胶。
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R Soc Open Sci. 2021 Jan 13;8(1):201480. doi: 10.1098/rsos.201480. eCollection 2021 Jan.