化学驱原油原位乳化及提高采收率机理研究进展

Progress of In-situ Emulsification and Enhanced Oil Recovery Mechanism of Chemical Flooding

周亚洲 杨文斌 殷代印

ZHOU Yazhou YANGWenbin YIN Daiyin

化学驱开采常伴随乳化现象的发生，原油原位乳化对于提高采收率有积极的作用。由于油藏孔喉结构以 及剩余油分布的复杂性，原油原位乳化独具特点。基于化学驱原油原位乳化近年来的研究成果，从化学驱原油 原位乳化机制、乳状液流变性及稳定性、原油原位乳化渗流特征和提高采收率机理等方面阐述了国内外研究现 状及发展趋势，分析了化学驱矿场试验中原油原位乳化规律及开采特征方面取得的经验与认识，并指出考虑乳 化形成机制、乳化程度以及乳化原油流变特性的非连续多相渗流数值模拟以及基于乳化调控机制的化学驱注入 方案优化设计是今后化学驱的重点攻关方向，以期为化学驱化学剂的选择及注入参数的优化提供理论指导。

In-situ crude oil emulsification often occurs in chemical flooding. Emulsification plays a positive role in enhancing oil recovery. Due to the complexity of pore-throat structure and remaining oil distribution，in-situ crude oil emulsification has its own characteristic. Based on the research results of crude oil in-situ emulsification in chemical flooding in recent years，the status and development trend were investigated from the in-situ emulsification mechanism of chemical flooding，rheology and stability of emulsion，emulsion seepage characteristic and improving oil recovery mechanism. The in-situ emulsification mechanism of crude oil and exploiting experience were analyzed from the field test of chemical flooding. The numerical simulation considering emulsification formation mechanism，emulsification degree and rheological property of emulsified crude oil，and the optimization design of chemical flooding injection scheme based on emulsification mobility control were the key research direction of chemical flooding in the future. It could provide theoretical guidance for the optimization of chemical agent and injection parameter of chemical flooding.

10.19346/j.cnki.1000-4092.2022.04.028