耐温自降解暂憋剂性能影响因素实验

刘顺; 刘建斌; 陈鑫; 周志祥; 黄凯; 杜恒毅; 张亚龙; 王宗振

doi:10.3969/j.issn.1006-6535.2024.06.018

特种油气藏 >

2024 , Vol. 31 >Issue 6: 145 - 150

DOI: https://doi.org/10.3969/j.issn.1006-6535.2024.06.018

钻采工程

耐温自降解暂憋剂性能影响因素实验

刘顺 ,
刘建斌 ,
陈鑫 ,
周志祥 ,
黄凯 ,
杜恒毅 ,
张亚龙 ,
王宗振

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1.西安石油大学石油工程学院,陕西西安 710065;
2.陕西省油气田特种增产技术重点实验室,陕西西安 710065;
3.中国石化江苏油田分公司,江苏扬州 225009;
4.中国石化中原油田分公司,河南濮阳 457001;
5.中国石油长庆油田分公司,陕西西安 710018

刘顺(1977—),男,教授,1998年毕业于西安石油学院化工设备与机械专业,2009年毕业于中国石油大学(华东)油气田开发工程专业,获博士学位,现主要从事非常规油气增产新策略与新方法等方面的研究工作。

收稿日期: 2023-07-04

修回日期: 2024-08-26

网络出版日期: 2025-01-22

基金资助

国家自然科学基金面上项目“超深致密油储层多效应协同驱油机理及强化排驱调控研究”(52174032);国家自然科学基金青年项目“地下复杂结构孔隙中稠油多重乳化机理与粒径预测”(52304035);陕西省博士后科研项目“油水前缘界面孔喉稳定机理及脉冲调控研究”(2023BSHYDZZ161)

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Study on the Influencing Factors of Diversion Agent Performance Suitable for New Volume Fracturing Technology

Liu Shun ,
Liu Jianbin ,
Chen Xin ,
Zhou Zhixiang ,
Huang Kai ,
Du Hengyi ,
Zhang Yalong ,
Wang Zongzhen

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1. College of Petroleum Engineering,Xi'an Shiyou University,Xi'an,shaanxi 710065,China;
2. Shaanxi Key Laboratory of Advanced Stimulation Technology for Oil & Gas Reservoirs,Xi'an,shaanxi 710065,China;
3. China Petroleum and Chemical Corporation Jiangsu Oil Field Branch,Yangzhou,Jiangsu 225009,China;
4. China Petroleum and Chemical Corporation Zhongyuan Oilfield Branch,Puyang,Henan 457001,China;
5. PetroChina Changqing Oilfield Company,Xi'an,shaanxi 710018,China

Received date: 2023-07-04

Revised date: 2024-08-26

Online published: 2025-01-22

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摘要

暂憋体积压裂技术要求暂憋剂解堵时间在几小时之内,而暂堵剂的解堵时间通常为几天,无法满足暂憋体积压裂对暂憋剂性能的要求。为此,采用水溶液聚合法,以纤维素为主体,丙烯酰胺为接枝单体,N,N-亚甲基双丙烯酰胺为交联剂合成了一种暂憋剂,并研究了在油藏条件下温度、矿化度、草酸含量、暂憋剂粒径对暂憋剂性能的影响。结果表明:该暂憋剂具有较好的耐温性能,残渣率基本维持稳定;温度为60 ℃时,暂憋剂可流动时间为2.60 h,溶解时间为7.43 h,残渣率为7.25%;暂憋剂的溶解速度随矿化度的升高而略有延缓,并且暂憋剂在CaCl₂溶液中的溶解速度较NaCl溶液中的溶解速度更慢,具有较好的耐盐性;暂憋剂与压裂液有较好的配伍性,在压裂液中的可流动时间和溶解时间略有延长;草酸含量对暂憋剂的残渣率影响非常小;随着暂憋剂粒径的降低,暂憋剂的可流动时间和溶解时间呈先缓慢降低后升高的变化趋势,并且组合粒径的暂憋剂的可流动时间和溶解时间均较单一粒径的暂憋剂有所延长。研究结果可为暂憋剂性能优化与暂憋剂运移规律研究提供理论基础。

关键词： 体积压裂; 暂憋剂; 溶解规律; 解堵

本文引用格式

刘顺 , 刘建斌 , 陈鑫 , 周志祥 , 黄凯 , 杜恒毅 , 张亚龙 , 王宗振 . 耐温自降解暂憋剂性能影响因素实验[J]. 特种油气藏, 2024 , 31(6) : 145 -150 . DOI: 10.3969/j.issn.1006-6535.2024.06.018

Abstract

The technology of volume fracturing by diversion agent requires that the deblocking time is within a few hours,whereas it usuallysustain several days,which cannot meet the requirements.To address the issue,an aqueous solution polymerization method was employed,utilizing cellulose as the main component,acrylamide as the graft monomer,and N,N-methylene bisacrylamide as the crosslinking agent,to synthesize a diversion agent.The study investigated the effects of temperature,salinity,oxalic acid content,and particle size of the crosslinking agent on its performance under reservoir conditions.The results indicate that the temporary storage agent exhibits good temperature resistance,with a residual rate remaining stable;at a temperature of 60 ℃,the flowable time of theagent is 2.60 hours,the dissolution time is 7.43 hours,and the residual rate is 7.25%.The dissolution rate slightly slows down with increasing salinity,and its dissolution rate in CaCl₂ solution is slower than in NaCl solution,which demonstrates good salt tolerance.The diversion agent exhibits good compatibility with fracturing fluids,with slightly extended flowable time and dissolution time in the fracturing fluid.The oxalic acid content has a minimal impact on the residual rate of theagent.As the particle size of the agent decreases,its flowable time and dissolution time exhibit a trend of slow decrease followed by an increase,and the flowable time and dissolution time with combined particle sizes are longer than those with a single particle size.The research results provide a theoretical basis for optimizing the performance of diversion agent and studying their migration patterns.

Key words： volume fracturing; diversion agent; dissolution pattern; deblocking

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