固核结构复合凝胶GN-1的制备及调堵性能

doi:10.7623/syxb202303009

石油学报 ›› 2023, Vol. 44 ›› Issue (3): 510-517.DOI: 10.7623/syxb202303009

固核结构复合凝胶GN-1的制备及调堵性能

李翔¹, 宋伟², 徐国瑞¹, 李敬松¹, 王晓龙¹

1. 中海油田服务股份有限公司天津 300459;
2. 中国石油大学(华东)石油工程学院山东青岛 266580

收稿日期:2022-10-12 修回日期:2023-01-18 出版日期:2023-03-25 发布日期:2023-04-06
通讯作者: 宋伟,男,1998年12月生,2021年获中国石油大学(华东)学士学位,现为中国石油大学(华东)硕士研究生,主要从事油田化学与提高采收率研究工作。Email:song15954231226@163.com
作者简介:李翔,男,1978年4月生,2001年获西南石油学院学士学位,现为中海油田服务股份有限公司油田生产研究院高级工程师,主要从事海上油气田稳油控水研究工作。Email:lixiang20@cosl.com.cn
基金资助:
国家重点研发计划项目"稠油化学复合驱冷采工业示范应用"(2018YFA0702405)资助。

Preparation and plugging performance of composite gel GN-1 with a firm core structure

Li Xiang¹, Song Wei², Xu Guorui¹, Li Jingsong¹, Wang Xiaolong¹

1. China Oilfield Services Limited, Tianjin 300459, China;
2. School of Petroleum Engineering, China University of Petroleum, Shandong Qingdao 266580, China

Received:2022-10-12 Revised:2023-01-18 Online:2023-03-25 Published:2023-04-06

摘要/Abstract

摘要： 由于长期注水开发,海上油田高含水问题越来越严重。凝胶体系可以有效封堵地层高渗通道,改善吸水剖面,减缓含水上升。基于海上作业实际情况,运用有机、无机化学合成理论,制备了易注入、耐温耐盐,用于逐步深部封堵的固核结构复合凝胶体系GN-1。用红外光谱仪、冷场发射扫描电镜SEM与透射电镜TEM观察分析了GN-1的基本结构及颗粒形貌,评价了GN-1的粒度分布和水化性能,并通过物理模拟实验测试了GN-1的封堵和驱油效果。实验结果表明,GN-1是一种具有纳米二氧化硅固核结构的微米级耐温耐盐型复合凝胶颗粒,粒径小于150 μm。GN-1在矿化度小于1×10⁵mg/L、温度小于130 ℃的条件下具有良好的水化性能。渗透率为124.9~2 952.4 mD条件下封堵率高于90%,非均质填砂管(3 259.5 mD和554.6 mD)模拟实验表明,GN-1辅助二次水驱总采出程度为52.9%,能进一步提高原油采出程度22.8%。

关键词: 固核结构, 复合凝胶, 纳米颗粒, 深部调剖, 采出程度

Abstract: Owing to the long-term water flooding development, high water cut in offshore oil field is a growing problem. The gel system can effectively plug the high permeability channel in reservoirs, improve water injection profile and reduce the rising rate of water cut. Based on the actual situation of offshore operation, the composite gel system with a firm core structure GN-1 used for gradual in-depth plugging has been prepared by use of the theory of organic and inorganic chemical synthesis, which is easy for injection, temperature and salt resistant. Infrared spectrometer, and cold field emission scanning electron microscopy (SEM)and transmission electron microscope (TEM)are applied to investigate and analyze the basic structure and particle morphology of GN-1, and evaluate the particle size distribution and hydration performance of GN-1; meanwhile, the plugging and oil displacement effect of GN-1 is tested through physical model experiment. The experimental results show that GN-1 is a micron composite gel particle resistant to temperature and salt, which has a nano-silica firm core structure with the particle size less than 150 μm. GN-1 boasts good hydration performance with the salinity less than 1×10⁵mg/L and the temperature under 130 ℃. When the permeability is between 124.9 and 2 952.4 mD, the plugging rate is higher than 90%. Heterogeneous sand filling pipe (3 259.5 mD and 554.6 mD)simulation experiment results show that total recovery degree of the secondary water flooding assisted by GN-1 is 52.9%, increased by 22.8%.

Key words: firm core structure, composite gel, nanoparticles, deep profile control, recovery degree

中图分类号:

TE357.4

李翔, 宋伟, 徐国瑞, 李敬松, 王晓龙. 固核结构复合凝胶GN-1的制备及调堵性能[J]. 石油学报, 2023, 44(3): 510-517.

Li Xiang, Song Wei, Xu Guorui, Li Jingsong, Wang Xiaolong. Preparation and plugging performance of composite gel GN-1 with a firm core structure[J]. Acta Petrolei Sinica, 2023, 44(3): 510-517.

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固核结构复合凝胶GN-1的制备及调堵性能

Preparation and plugging performance of composite gel GN-1 with a firm core structure

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