西南石油大学学报(自然科学版) ›› 2025, Vol. 47 ›› Issue (4): 1-9.DOI: 10.11885/j.issn.1674-5086.2024.07.03.02

• 院士思维 •    下一篇

钻井液用高吸水性树脂的防漏堵漏性能研究

罗平亚1,2, 代锋1,3, 刘应民3, 贺佳宁1, 白杨1,2,4   

  1. 1. 西南石油大学石油与天然气工程学院, 四川 成都 610500;
    2. 油气藏地质及开发工程全国重点实验室·西南石油大学, 四川 成都 610500;
    3. 四川长宁天然气开发有限责任公司, 四川 成都 610000;
    4. 油气钻完井技术国家工程研究中心, 北京 昌平 102200
  • 收稿日期:2024-07-03 发布日期:2025-07-25
  • 通讯作者: 代锋,E-mail:daifeng99@petrochina.com.cn
  • 作者简介:罗平亚,1940年生,男,汉族,四川隆昌人,中国工程院院士,主要从事钻井液与完井液、储层保护技术和提高采收率方面的研究工作。E-mail:luopy@swpu.edu.cn
    代锋,1984年生,男,汉族,四川威远人,高级工程师,博士研究生,主要从事页岩气钻完井工程方面的研究工作。E-mail:daifeng99@petrochina.com.cn
    刘应民,1982年生,男,汉族,四川叙永人,高级工程师,主要从事页岩气钻井工程管理和相关科研工作。E-mail:283121983@qq.com
    贺佳宁,2000年生,女,汉族,新疆昌吉人,硕士研究生,主要从事油气井工作液方面的研究工作。E-mail:1484327779@qq.com
    白杨,1985年生,男,汉族,新疆昌吉人,研究员,博士研究生导师,主要从事油气井工作液方面的研究工作。E-mail:281824767@qq.com
  • 基金资助:
    国家自然科学基金(52274008,U23A2026);国家重点研发计划(2019YFA0708303);中国石油西南石油大学创新联合体科技合作项目(2020CX040102,2020CX040201)

Research on High Water Absorbent Resin for Leak Prevention and Sealing in Water-based Drilling Fluid

LUO Pingya1,2, DAI Feng1,3, LIU Yingmin3, HE Jianing1, BAI Yang1,2,4   

  1. 1. Petroleum Engineering School, Southwest Petroleum University, Chengdu, Sichuan 610500, China;
    2. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, China;
    3. Geological Engineering Department of Sichuan Changning Natural Gas Development Co. Ltd., Chengdu, Sichuan 610000, China;
    4. National Engineering Research Center of Oil & Gas Drilling and Completion Technology, Changping, Beijing 102200, China
  • Received:2024-07-03 Published:2025-07-25

摘要: 针对采用水基钻井液开采页岩油气藏时,容易因页岩含黏土颗粒、天然裂缝等导致井漏且无法堵漏成功的问题,以丙烯酸和聚乙烯醇为单体,N,N'-亚甲基双丙烯酰胺为化学交联剂,采用响应曲面法并以吸水倍率为响应目标,对实验因素进行优化,通过自由基溶液聚合制得一种PAA(聚丙烯酸)和PVA(聚乙烯醇)互穿网络结构的高吸水性树脂堵漏剂。采用红外、热重和扫描电镜分析验证了堵漏剂的合成成功并具备热稳定性。利用封堵及承压能力实验、砂床实验和微裂缝模拟实验对堵漏剂的承压堵漏性能进行评价。实验结果表明,堵漏剂具备良好热稳定性,在裂缝宽度为2 mm,温度为180 ℃,堵漏剂加量为3%,围压为10 MPa条件下,最高承压能力为6.08 MPa,高温高压滤失量为9 mL,能够有效实现页岩地层中水基钻井液的堵漏目标。

关键词: 页岩, 堵漏, 高吸水性树脂, 响应曲面法, 吸水倍率

Abstract: To address the problem of wellbore leakage caused by clay particles and natural fractures in shale oil and gas reservoirs using water-based drilling fluids, which cannot be successfully plugged, acrylic acid and polyvinyl alcohol are used as monomers, N, N'-methylene bisacrylamide is used as a chemical crosslinking agent, and the response surface method is adopted with water absorption rate as the response target. The experimental factors are optimized, and a PAA/PVA interpenetrating network structure high water absorbent resin plugging agent is prepared through free radical solution polymerization. The successful synthesis and thermal stability of the plugging agent were verified by infrared, thermogravimetric, and scanning electron microscopy analysis. Evaluate the pressure sealing performance of the plugging agent through sealing and pressure bearing capacity experiments, sand bed experiments, and micro crack simulation experiments. The test results show that the plugging agent has good thermal stability. Under the conditions of a fracture width of 2 mm, a temperature of 180 ℃, a plugging agent dosage of 3%, and a confining pressure of 10 MPa, the maximum pressure bearing capacity is 6.08 MPa, and the high-temperature and high-pressure filtration loss is 9 mL. It can achieve the plugging effect of water-based drilling fluid in shale formations.

Key words: shale, plugging, high water absorbent resin, response surface methodology, water absorption rate

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