微生物采油技术用于聚驱后油藏的研究进展

聚合物驱后仍会有大量的剩余油残留在低渗透层中,而且油层中滞留的聚合物还会给后续的驱油带来负面影响。有很多证据表明,在聚驱油藏中、聚驱油田产出液中、油田土壤中,存在能降解常用驱油聚合物,并以之为唯一营养源的细菌。这样人们就可以利用微生物的降解作用除去油藏中残留聚合物,再结合常规微生物采油技术进一步提高聚驱后油藏的采收率。目前已经进行的室内、现场实验取得了一定成效,但有明显局限性。不过通过进一步的理论研究,大部分问题会得到解决,所以该技术的发展前景仍然广大。

Advance of Research for MEOR in Oil Reservoir after Polymer Flooding

After polymer flooding,much oil remained in permeable zone.The polymers leaved in oil reservoir would be harmful of succeeding flooding.It had been proven that the bacteria decomposing polymers for flooding as exclusive nutrition exist in oil reservoir applying polymers,produced liquid and soil of oil field with polymer.So,the polymers remaining in oil reservoir could be removed with degrading ability of microbe,and the recovery of oil reservoir with polymer flooding would advance with general technology of microbial enhance oil recovery.The indoor and field experiments had been effective,but they were limited obviously.The problems mostly would been settled by more theory studies,so the MEOR after polymer flooding would advance rapid still.