聚合物微球试验效果评价

Effect evaluation of polymer microsphere test

油藏的非均质性对水驱驱替液波及系数的影响严重,只有通过深部调驱,才能更经济有效地调整、改善油藏的非均质性,从而提高注入液的体积波及系数,提高注水采油阶段的原油采收率。聚合物微球技术是近年来发展起来,具有“注得进、堵得住、能移动”等特性的新型深部调驱技术,依靠纳/微米级遇水可膨胀微球来逐级封堵地层孔喉实现其逐级深部调驱的效果。该技术具有体系黏度低、耐高温高盐、可以直接污水配制、在线注入等优点。本文通过试验区注水井注入特征及采油井见效特征进行综合分析,系统评价了聚合物微球的整体效果。

The influence of reservoir heterogeneity on sweep coefficient of water flooding displacement fluid is serious.Only by deep litter flooding,can the reservoir heterogeneity be adjusted and improved more economically and effectively,thus the volume sweep coefficient of injection fluid is increased,and the oil recovery during water flooding and oil recovery stage is enhanced.Polymer microspheres technology is a new deep profile control and displacement technology developed in recent years,which has the characteristics of"injection,plugging and movable".It relies on nano/micron expandable microspheres to plug formation pore throat step by step to achieve the effect of deep profile control and displacement step by step.The technology has the advantages of low viscosity,high temperature and salt resistance,direct sewage preparation and on-line injection.In this paper,the overall effect of polymer microspheres is systematically evaluated by comprehensive analysis of injection characteristics of water injection wells and production wells in the test area.