一种耐温耐盐冻胶调剖体系的制备与性能评价

Preparation and Performance Evaluation of Gel Profile Control System with Temperature and Salt Resistance

杜 洁 原凤刚 陈锐兵 谢 辉 张翰清 袁恩来

DU Jie YUAN Fenggang CHEN Ruibing XIE HUI ZHANG Hanqing YUAN Enlai

为了解决油田开采后期储层平剖面矛盾加剧、水流优势通道发育导致注入水低效无效循环、注采不平衡等问题，以疏水缔合聚合物为主剂，以无机盐铝和氧氯化锆为原料制得的有机铝锆交联剂为主交联剂，以木质素磺酸钠热稳定剂为助剂，制得了一种耐温耐盐冻胶调剖体系，研究了其成胶性能、抗稀释性能、抗剪切性能、运移封堵性能及耐冲刷性能。该调剖体系的优选配方为：0.4%疏水缔合聚合物+0.3%～0.35%有机铝锆交联剂+0.2%热稳定剂。研究结果表明，优选体系的基液黏度为 88.3～95.8 mPa·s，低黏度基液赋予体系较好的泵入性，可保证施工安全。在温度为 200 ℃、矿化度为 27 123.5 mg/L 的条件下，体系的成胶黏度（90 d）可保持在 6000 mPa·s 以上，黏度保留率在 80%以上；当用 60%的地层水对优选体系稀释后，成胶黏度仍能达到 4000 mPa·s，且成胶后稀释对体系成胶黏度影响更小。该体系在渗透率分别为 500×10-3、1000×10-3、2000×10-3 μm2的岩心均具有良好的运移能力，在距离岩心注入端≥50 cm处压力逐渐趋于平稳，且封堵率均达80%以上，随着大量注入水的驱替，注入调剖体系的岩心渗透率基本不变，具有良好的耐冲刷性能。

In order to solve the problems of inefficient，ineffective circulation of injected water and imbalanced injection and production in the later stage of oilfield development due to intensified contradictions in reservoir profile and development of dominant channel of water flow，a temperature and salt resistant gel profile control system was developed using hydrophobic associating ploymer as the main agent，organic aluminum zirconium crosslinking agent made from inorganic salt aluminum and zirconium oxychloride as the main crosslinking agent，and sodium lignosulfonate heat stabilizer as the auxiliary. Its gelling performance，anti-dilution performance，shear resistance，plugging performance and erosion resistance were studied. The optimal formula for the profile control system was as follows：0.4% hydrophobic associating polymer，0.3%—0.35% organic aluminum zirconium crosslinking agent and 0.2% heat stabilizer. The research results indicated that the viscosity of the base liquid was 88.3—95.8 mPa·s，and the low viscosity base fluid endowed with better pumping performance，which could ensure the construction safety. Under the condition of 200 ℃ and salinity of 27 123.5 mg/L，the gelation viscosity of the system within 90 d could be maintained above 6000 mPa·s，and the viscosity retention rate could reach above 80%. When diluted with 60% of the formation water，the gelation viscosity of the system could still reach over 4000 mPa·s，and the dilution after gelation had a smaller impact on the gelation strength of the system. The system has good migration ability in cores with permeability of 500×10-3，1000×10-3 and 2000×10-3 μm2，respectively，and the pressure gradually stabilized at a distance greater than 50 cm from the injection end of the rock core，and plugging rate was over 80%. With the displacement of a large amount of injected water，the permeability of the injected profile control system remained basically unchanged，exhibiting good erosion resistance.

10.19346/j.cnki.1000-4092.2025.01.010