耐温抗盐类聚合物驱研究现状及展望

Development and Prospect of Heat-and Salt-Resistant Polymer Flooding

随着我国常规油藏的开采逐渐进入后期阶段,原油的产量缓慢减少,所以对于页岩油、重油、高温高盐等非常规油藏的开发开采以及提高原油产量越来越受到关注,因此,优化石油开采技术与提高原油开采率依然是研究的重点。化学驱是三次采油继续开采储层中未被驱替的剩余油和残余油的一种重要方法,可用于水驱后剩余油的开采。在化学驱提高采收率技术中,聚合物具有成本低、种类多等优点,应用较为广泛。对聚合物驱的基础理论、最新研究成果以及各类耐温耐盐的聚合物的发展趋势进行概括,并对其在矿场的应用效果进行了总结,展望了聚合物驱在复杂油气藏条件下的未来研究趋势。

The development of China s conventional oil reservoirs has gradually entered the late stage,with a slow decline in crude oil production.Consequently,the exploration and development of unconventional oil reservoirs such as shale oil,heavy oil,high-temperature,and high-salinity reservoirs have gained increasing attention.Thus,optimizing petroleum extraction techniques and enhancing the crude oil recovery rate remain research focal points.Chemical flooding is a significant method for the tertiary oil recovery,specifically for the extraction of residual and remaining oil in reservoirs that remains unrecovered after water flooding.In the context of enhanced oil recovery through chemical flooding,polymers have the advantages of low cost,multiple types,and are widely used.This article provides an overview of the fundamental theory of polymer flooding and the latest research achievements.It also summarizes the development trends of various high-temperature and high-salinity resistant polymers.Furthermore,it concludes their application effectiveness in the field and anticipates future research directions for polymer flooding in complex oil and gas reservoir conditions.