水滑石插层降失水剂的制备和性能研究

摘要随着石油开发逐渐转向陆地深层、超深层，固井工程对油井水泥降失水剂的要求越来越高，降失水剂在高温高盐地层依然需要具备良好的控水特性。为了满足油井水泥降失水剂耐高温的性能，将有机聚合物降失水剂与新型无机材料水滑石结合起来，研制出一种耐高温耐盐的新型油井水泥降失水剂。选择2-丙酰胺基-2-甲基丙磺酸（AMPS）、对苯乙烯磺酸钠（SSS）、N，N-二甲基丙烯酰胺（DMAA）与衣康酸（IA）合成四元有机聚合物降失水剂F₁，利用水滑石的层间离子可交换特性将有机聚合物降失水剂插入镁铝型水滑石（Mg/Al-LDHs）层间，研究高温下水滑石对聚合物降失水剂的保护作用。利用红外光谱、XRD与热重分析等表征水滑石插层降失水剂Mg/Al-F₁-LDHs，采用静态失水实验测试水泥浆失水量。结果证明该新型降失水剂合成成功，在240℃，氯化钠（NaCl）浓度为57%（质量分数，下同）的盐水条件下，水泥浆失水量为86 mL。

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	魏浩光
	常庆露
	刘小刚
	邢钰冰
	胡苗苗
	郭锦棠

关键词：油井水泥耐高温降失水剂水滑石

Abstract： As oil development gradually shifts to deep and ultra-deep layers on land, cementing engineering has higher and higher requirements for fluid loss additives on oil well cements. Fluid loss additives still need to have good water control properties in high-temperature and high-salt formations. In order to meet the high temperature resistance of oil well cement fluid loss agent, the organic polymer fluid loss agent is combined with the new inorganic material hydrotalcite to develop a new type of oil well cement fluid loss agent that is resistant to high temperature and salt. 2-Acrylamido-2-methylpropane sulfonic acid (AMPS), sodium p-styrene sulfonate (SSS), N,N-dimethylacrylamide (DMAA) and itaconic acid (IA) were chosen to synthesize quaternary organic polymer fluid loss agent F₁, and the interlayer ion exchange characteristics of hydrotalcite was used to insert the organic polymer fluid loss agent into magnesium aluminum hydrotalcite (Mg/Al-LDHs) between layers, the protective effect of hydrotalcite on polymer fluid loss agent at high temperature was studied. Infrared spectroscopy, XRD and thermogravimetric analysis were used to characterize the hydrotalcite intercalation fluid loss reducer Mg/Al-F₁-LDHs, and the static fluid loss experiment was used to test the fluid loss of cement slurry. The results proved that the new fluid loss agent was successfully synthesized, and the water loss of cement slurry was 86 mL under the condition of 240℃ and salt water with 57% sodium chloride (NaCl) concentration.

Keywords： oil well cement； high temperature resistance； fluid loss agent； hydrotalcite

Received 2021-06-24;

Fund:中国石化固井与完井重点实验室开放基金（20-GWJ-KF-2）；国家自然科学基金资助项目（51874210）。

Corresponding Authors: 郭锦棠,教授,E-mail:jtguo@tju.edu.cn。 Email: jtguo@tju.edu.cn

About author: 魏浩光(1982-),男,高级工程师,现从事固井水泥浆胶凝材料与化学剂方面的研究;常庆露(1995-),女,博士研究生,现从事油井水泥外加剂方面的研究。

引用本文:

魏浩光, 常庆露, 刘小刚, 邢钰冰, 胡苗苗, 郭锦棠.水滑石插层降失水剂的制备和性能研究[J]. 化学工业与工程, 2022,39(2): 84-89

WEI Haoguang, CHANG Qinglu, LIU Xiaogang, XING Yubing, HU Miaomiao, GUO Jintang.Preparation and performance of hydrotalcite intercalation fluid loss agent[J]. Chemcial Industry and Engineering, 2022,39(2): 84-89

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