高温高盐油藏聚合物纳米微球调驱研究

华北油田赵86油藏断块为一个高温高盐断块油藏,油藏内油水井之间的水淹水窜现象严重,常规的调驱手段存在有效期短和效果差的缺点,深部调驱作用有限,液流改向效果不理想,难以有效提高油藏的最终采收率。近年来,纳米微球深部调驱技术以其良好的调驱效果,逐渐在国内应用并发展起来。纳米微球在地面成胶,可降低矿化度、地层温度、地层剪切等环境因素对体系的影响。纳米微球初始尺寸小、粘度低、注入工艺简单、膨胀时间可控、可实现逐级封堵,在中、低渗透油田适应性强。

Study on Nanospheres Flooding in a High Temperature and High Salinity Reservoir

Zhao 86 fault block is a high temperature and high salinity block reservoir in Huabei Oilfield, water channeling and flooding are serious between oil and water wells in the reservoir, the validity of conventional profile control and displacement is short ,and the results are poor, in this case, this block urgently needs an effective technique of deep profile control and displacement, to improve the deep flow of reservoir, increase the role of oil and water control, increase ultimate recovery reservoir. Nanospheres deep profile control and displacement technology is a new proposed technique. Nanospheres which become gel on the ground, can reduce the effect of salinity, formation temperature, formation shear and other environmental factors on the system. Nanospheres have small initial size, low viscosity, the injection process is simple, expansion time can be controlled, progressively plugging can be achieved in low permeability oilfields.