封堵用交联体系成胶机理及微观表征分析

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引用格式：，等. 封堵用交联体系成胶机理及微观表征分析[J]. 当代化工，2026, 55（4）：806-810.

KONG Liping, KAN Liang, ZHANG Qiang, et al. Analysis on Polymerization Mechanism and Micro-characterization of Crosslinking System for Sealing[J]. Contemporary Chemical Industry, 2026, 55(4): 806-810.

1,2,3 ，阚亮 1,2,3 ，张强 1,2,3 ，敖文君 1,2,3 ，王锦林 1,2,3 ，任树亮 1,2,3 ，方月月 1,2,3

（1.海洋油气高效开发全国重点实验室，北京102209；2.中海油能源发展股份有限公司提高采收率重点实验室，天津300452；3.中海油能源发展股份有限公司工程技术分公司，天津300450)

中图分类号：TQ427；TE53

文献标志码：A

文章编号：1671-0460（2026）04-0806-05

Analysis on Polymerization Mechanism and Micro-characterization of Crosslinking System for Sealing

KONG Liping 1,2,3 , KAN Liang 1,2,3 , ZHANG Qiang 1,2,3 , AO Wenjun 1,2,3 , WANG Jinlin 1,2,3 , REN Shuliang 1,2,3 , FANG Yueyue 1,2,3

(1. State Key Laboratory of Offshore Oil and Gas Exploitation, Beijing 102209;

2. CNOOC Energy Technology & Services Limited Key Laboratory of Enhanced Oil Recovery, Tianjin 300452;

3. CNOOC EnerTech-Drilling & Production Company, TianJin 300450)

Abstract: Based on the oil reservoir conditions of Bohai B oilfield, the polymerization mechanism and microcharacterization analysis of phenolic-formaldehyde cross-linked gel system were studied. The viscosity meter, high-temperature high-pressure rheometer, and scanning electron microscope were used to analyze the changes in polymerization strength, rheological characteristics, and internal micro-morphology of the cross-linked system at different stages, and further characterize the mechanism of cross-linking. At the same time, a double-layer non-uniform core was used to investigate the sealing rate and residual resistance coefficient of the cross-linked system after sealing, and further explain the fluid flow direction and sealing regulation mechanism of the high-permeability layer. The results showed that with the increase of polymer main agent mass concentration and temperature, the viscosity of the system increased, the polymerization strength increased, and the polymerization time decreased. During the polymerization process, the elastic modulus of the system gradually increased, and the viscous modulus changed less in this process, and the elastic modulus always dominated, and the cross-linked system showed obvious elastic characteristics. After the system polymerization, the molecular chains of the cross-linked system were cross-linked and entwined, forming a clear three-dimensional spatial network structure, with better water content and stability. In the double-layer non-uniform core porous medium, the sealing rate of the cross-linked system after polymerization was 98.8%, and the residual resistance coefficient was 80.32. After polymerization, the cross-linked system could effectively control the sealing of large pores and dominant channels to realize fluid flow direction.

Keywords: Polymers; Gels; Gel strength; Viscosity; Interfacial rheology; Micro-characterization; Porous medium; Sealing control

高含水油田的长期水驱造成了储层非均质性不断加剧，层间、平面、层内三大矛盾更加突出，注入水低效无效循环是高含水、低采出程度的重要原因。（剩余10814字）