高温高盐碳酸盐岩储层用油溶性混合树脂暂堵剂的制备与评价

doi:10.3969/j.issn.1006-6535.2026.04.022

摘要/Abstract

摘要： 塔河油田碳酸盐岩储层具有高温、高盐、高酸的特征,常规暂堵剂稳定性差、强度不足,难以适配该储层的需求。针对该问题,以马来酸酐改性石油树脂为主要原料,复配松香改性酚醛树脂、萜烯树脂和环氧树脂,制备了一种油溶性混合树脂暂堵剂,对其配方进行优化,并进行了性能评价。研究表明:该暂堵剂最优配方为81.67%改性C₉石油树脂+6.77%松香改性酚醛树脂+8.72%萜烯树脂+2.84%环氧树脂;在温度为140 ℃、矿化度为21×10⁴ mg/L、质量分数为5.00%盐酸的极端条件下,该暂堵剂仍能保持优异稳定性,突破压力超过10 MPa,同时,具备遇水封堵、遇油解堵的油水选择性,封堵后储层渗透率恢复率超过93.0%。塔河油田X井现场先导试验显示,应用该暂堵剂后,油井无水采油期较邻井延长20%,含水率由82%降至18%,日产油由3.5 t提升至12.8 t,控水增油效果显著。该研究成功解决了高温高盐碳酸盐岩储层暂堵技术瓶颈,可为缝洞型碳酸盐岩油藏高效控水开发提供技术支持。

关键词: 高温高盐, 碳酸盐岩, 缝洞型油藏, 暂堵剂, 塔河油田

Abstract: Carbonate reservoirs in the Tahe Oilfield are characterized by high temperature,high salinity and high acidity.Conventional temporary plugging agents show poor stability and insufficient strength,and that are difficult to meet the requirements of such reservoirs.In response to this,an oil-soluble mixed-resin temporary plugging agent was prepared using maleic anhydride modified petroleum resin as the main raw material,and compounding rosin-modified phenolic resin,terpene resin,and epoxy resin.The formulation was optimized and its performance was evaluated.The results show that the optimal formulation is 81.67% modified C₉ petroleum resin+6.77% rosin-modified phenolic resin+8.72% terpene resin+2.84% epoxy resin.Under extreme conditions of 140 ℃,salinity of 21×10⁴ mg/L,and 5.00% hydrochloric acid,the temporary plugging agent still maintains excellent stability,with a breakthrough pressure exceeding 10 MPa.Meanwhile,it exhibits oil-water selectivity of plugging upon water contact and unplugging upon oil contact;after plugging,the reservoir permeability recovery exceeds 93.0%.A pilot field test in Well X in the Tahe Oilfield shows that after application of this temporary plugging agent,the water-free oil production period is extended by 20% compared with nearby wells,water cut decreases from 82% to 18%,and daily oil production increases from 3.5 t to 12.8 t,indicating significant water control and oil increase effects.This study successfully addresses the bottleneck of temporary plugging technology for high-temperature and high-salinity carbonate reservoirs,and can provide technical support for efficient water-control development of fractured-vuggy carbonate reservoirs.

Key words: high temperature and high salinity, carbonate rocks, fractured-vuggy reservoir, temporary plugging agent, Tahe Oilfield

中图分类号:

TE357

董秀民, 方静, 冯新根. 高温高盐碳酸盐岩储层用油溶性混合树脂暂堵剂的制备与评价[J]. 特种油气藏, 2026, 33(4): 168-174.

Dong Xiumin, Fang Jing, Feng Xin'gen. Preparation and evaluation of an oil-soluble mixed-resin temporary plugging agent for high-temperature and high-salinity carbonate reservoirs[J]. Special Oil & Gas Reservoirs, 2026, 33(4): 168-174.

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