聚合物微球与本源微生物的协同驱油效果

Synergy Oil Displacment Effect of Polymeric Microspheres and Origin Microorganism Flooding System

韩作为 曹 丽 王晓锋 苏 明

HAN Zuowei，CAO Li，WANG Xiaofeng，SU Ming

为深入研究聚合物微球与本源微生物驱油技术在低渗裂缝性油藏的协同驱油效果，研究了聚合物微球对岩心的封堵性，微生物与油藏温度、地层水的配伍性，聚合物微球对菌种繁殖能力影响，并进行了微生物驱和“聚合物微球/复合微生物”驱实验。研究结果表明：聚合物微球在低渗岩心中具有较好的注入性，随着聚合物微球在低渗岩心中运移的深入，产生逐级封堵效果。优选的微生物在目标区块储层能很好地生产繁殖，聚合物微球具有良好的协同配伍性，聚合物微球的加入不会影响微生物的繁殖。单独实施本源微生物驱油，油水界面张力可降低47%，驱油效率比水驱提高6.91%；“聚合物微球/复合微生物”驱油体系的驱油效率比水驱提高10.05%，满足了安塞油田王窑区块低渗裂缝油藏的矿场调驱需要。

In order to further study the synergistic oil displacement effect of polymer microspheres and origin microorganism flooding technology in low-permeability fractured reservoirs，the plugging ability of polymer microspheres to the core，the compatibility of microorganisms with reservoir temperature and formation water，and the influence of polymer microspheres on the propagation ability of microorganisms were studied，and microbiological displacement and polymer microsphere/compound microbe flooding experiments were also carried out. The test results showed that polymer microspheres had a good injectability in low-permeability cores. With the further migration of polymer microspheres in low permeability cores，the stepwise plugging effect would be produced. The optimized microorganisms could grow and propagate well in the reservoir of the target block，with the addition of polymer microspheres. The interfacial tension between oil and water could be reduced by 47% in microorganism flood test and the oil displacement efficiency could be increased by 6.91% compared with that of water flooding. Oil displacement efficiency was higher than that of water flooding with the increasing of 10.05% in microspheres/origin microorganism flooding test， which met the field profile control and flooding adjustment needs of low-permeability fractured reservoirs in Wangyao block of Ansai oilfield.

10.19346/j.cnki.1000-4092.2019.03.008