高温中低渗油藏智能纳米黑卡驱提高采收率技术

Nano Black Card Flooding Technology for Enhanced Oil Recovery in High Temperature and Low Permeability Reservoirs

李洪生 刘艳华 王正欣 张连锋 赵宇恒 袁伟峰 侯吉瑞

LI Hongsheng LIU Yanhua WANG Zhengxin ZHANG Lianfeng ZHAO Yuheng YUAN Weifeng HOU Jirui

当前化学驱储量接替严重不足，亟需攻关突破高温中低渗油藏提高采收率技术。智能纳米黑卡驱油技术是当下极具前瞻性的纳米驱油技术，可大幅度提高采收率。针对河南油田高温中低渗油藏，开展高温条件下纳米黑卡静态性能评价，并通过高温岩心驱替实验评价不同渗透率条件下智能纳米黑卡驱油效果。结果表明，智能纳米黑卡具有优异的耐高温性能，分散稳定性好，能够降低油水界面张力至 10-1 mN/m，并具有改变润湿性和快速乳化与破乳性能。同时，纳米黑卡具有高效的洗油能力，在95 ℃下注入0.3 PV的质量分数为0.005%的智能纳米黑卡溶液，在目标油田不同渗透率（50×-3 ～450×10-3 μm2）条件下可提高采收率 15.8 百分点～20.0 百分点。因此，智能纳米黑卡驱油技术适用于河南油田高温中低渗油藏提高采收率。

In the case of the severe inadequacy in replacing chemical flooding reservoirs currently，there is an urgent need to tackle and break through the technology for enhancing oil recovery in high-temperature and low-permeability oil reservoirs. The smart nano black card oil displacement technology is a highly forward-looking nanotechnology for enhanced oil recovery，which has the potential to significantly enhance oil recovery. According to the condition of high temperature and low permeability reservoir in Henan oilfield，the static performance evaluation of smart nano black card（SNBC）under high temperature condition was carried out，and the oil displacement effect of SNBC under different permeability conditions was evaluated by high temperature core displacement experiment. The results showed that the SNBC had excellent high temperature resistance and good dispersion stability. SNBC could reduce the oil-water interfacial tension to 10-1 mN/m，and had the ability to change the wettability and emulsify and demulsify rapidly. At the same time，the SNBC had a high efficient oil washing ability. At the temperature of 95 ℃，the injection of 0.3 PV SNBC solution with a mass concentration of 0.005% could improve the recovery rate by 15.8—20 percentage points under different permeability of 50×10-3 —450×10-3 μm2 in the target oilfield. As a result，the SNBC oil displacement technology is suitable for enhanced oil recovery of high temperature and low permeability reservoirs in Henan oilfield.

10.19346/j.cnki.1000-4092.2024.03.014