超支化聚合物HP-NH2的合成及防塌机理研究

doi:10.11885/j.issn.16745086.2021.04.30.01

西南石油大学学报(自然科学版) ›› 2021, Vol. 43 ›› Issue (4): 99-108.DOI: 10.11885/j.issn.16745086.2021.04.30.01

• 深层和非常规油气钻完井专刊 • 上一篇下一篇

超支化聚合物HP-NH₂的合成及防塌机理研究

魏云锦¹, 黄学刚¹, 邹源红², 徐伟宁^1,3, 谢刚³

1. 中国石油西南油气田公司开发事业部, 四川成都 610000;
2. 中国石油西南油气田公司气田开发管理部, 四川成都 610000;
3. 西南石油大学石油与天然气工程学院, 四川成都 610500

收稿日期:2021-04-30 发布日期:2021-08-06
通讯作者: 谢刚,E-mail:201899010129@swpu.edu.cn
作者简介:魏云锦,1989年生,女,汉族,四川成都人,工程师,硕士,主要从事钻井技术研究。E-mail:weiyj045@petrochina.com.cn
黄学刚,1984年生,男,汉族,四川成都人,工程师,硕士,主要从事钻井技术研究。E-mail:huangxueg407@petrochina.com.cn
邹源红,1974年生,女,汉族,四川成都人,工程师,主要从事页岩气勘探开发研究。E-mail:zyhweihw@petrochina.com.cn
徐伟宁,1991年生,男,汉族,四川成都人,工程师,主要从事钻井工程管理方面的研究。E-mail:xwn2014@petrochina.com.cn
谢刚,1987年生,男,汉族,四川成都人,讲师,博士,主要从事油气井工作液基础理论与技术研究工作。E-mail:201899010129@swpu.edu.cn
基金资助:
中国石油-西南石油大学创新联合体科技合作项目（2020CX040201）；中国石油西南油气田公司开发事业部项目（XNS开发部JS2020-04）

A Study on Anti-collapse Mechanism and Synthesis of Hyperbranched Polymer HP-NH₂

WEI Yunjin¹, HUANG Xuegang¹, ZOU Yuanhong², XU Weining^1,3, XIE Gang³

1. Development Division, Southwest Oil and Gas Field Company, PetroChina, Chengdu, Sichuan 610000, China;
2. Gas Field Development Management Department, Southwest Oil and Gas Field Company, PetroChina, Chengdu, Sichuan 610000, China;
3. Petroleum Engineering School, Southwest Petroleum University, Chengdu, Sichuan 610500, China

Received:2021-04-30 Published:2021-08-06

摘要/Abstract

摘要： 井壁稳定是当前水基钻井液钻深层页岩气的技术难点。以二乙烯三胺和N，N-亚甲基双丙烯酰胺为原料，通过迈克尔加成反应合成了超支化聚合物HP-NH₂。采用红外光谱法、液相色谱-质谱联用法、凝胶色谱法、粒度分析法和热失重分析法表征了HP-NH₂的结构和特征。研究发现，HP-NH₂的数均分子量为3 371 g/mol，多分散指数为2.7，分子量分布较宽，粒径280～1 900 nm，抗温能力达到280℃。通过线性膨胀实验、回收率实验、泥饼分散实验和“人造泥饼”法分析了HP-NH₂作为防塌剂的防塌性能。研究表明，随着HP-NH₂浓度的增加，膨润土的线性膨胀率逐渐降低（最低为19.11%），岩屑的滚动回收率逐渐升高（最高为75.18%），人造泥饼的渗透率逐渐下降。小分子HP NH₂能够插入蒙脱石的晶层间，交换出层间易水化的阳离子，拉紧基底间距，抑制蒙脱石的水化分散；大分子HP-NH₂能有效封堵泥饼的微纳米孔缝，起到一剂多用的功效。因此，HP-NH₂可作为一种潜在的一剂多用防塌剂应用于水基钻井液体系。

关键词: 防塌剂, 超支化聚合物, 抑制性能, 封堵性能, 防塌机理

Abstract: Wellbore stability is the current technical difficulty in drilling deep shale gas with water-based drilling fluids. Using diethylenetriamine and N, N-methylenebisacrylamide as raw materials, the hyperbranched polymer HP-NH₂ was synthesized by Michael addition reaction. The structure and characteristics of the hyperbranched polymer HP-NH₂ were characterized by infrared spectroscopy, liquid chromatography-mass spectrometry, gel chromatography, particle size analysis and thermal weight loss analysis. The study found that the number average molecular weight of the hyperbranched polymer HP-NH₂ was 3 371 g/mol, the particle size was in the range of 280～1 900 nm, and the temperature resistance reached 280℃. Through the artificial mud cake method, linear expansion experiment, recovery rate experiment and mud cake dispersion experiment, the anti-collapse performance of hyperbranched polymer HP-NH₂ as an anti-collapse agent was analyzed. We found that with the increase of HP-NH₂, the linear expansion rate of bentonite gradually decreased (the lowest was 19.11%), the rolling recovery rate of cuttings gradually increased (the highest was 75.18%), and the permeability of the artificial mud cake gradually declined. Hyperbranched polymer HP-NH₂ can be inserted between the crystal layers of montmorillonite to exchange cations that are easily hydrated between the layers, tighten the substrate spacing, and inhibit the hydration and dispersion of montmorillonite; HP-NH₂ can also effectively block mud cake's micro-nano pores. Therefore, the hyperbranched polymer HP-NH₂ can be used as a potential anti-collapse agent in water-based drilling fluid systems.

Key words: anti-collapse agent, hyperbranched polymer, inhibition performance, blocking performance, anti-collapse mechanism

中图分类号:

TE254

魏云锦, 黄学刚, 邹源红, 徐伟宁, 谢刚. 超支化聚合物HP-NH₂的合成及防塌机理研究[J]. 西南石油大学学报(自然科学版), 2021, 43(4): 99-108.

WEI Yunjin, HUANG Xuegang, ZOU Yuanhong, XU Weining, XIE Gang. A Study on Anti-collapse Mechanism and Synthesis of Hyperbranched Polymer HP-NH₂[J]. Journal of Southwest Petroleum University(Science & Technology Edition), 2021, 43(4): 99-108.

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超支化聚合物HP-NH₂的合成及防塌机理研究

A Study on Anti-collapse Mechanism and Synthesis of Hyperbranched Polymer HP-NH₂

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