蒙古林砾岩油藏内源菌厌氧激活实验研究

Experimental study on anaerobic activation of indigenous bacteriafor Conglomerate reservior in Menggulin Oilfield

为了评价厌氧激活内源微生物采油技术在蒙古林砾岩油藏中的应用情况,结合该油藏温度及物性特征对其开展了内源微生物厌氧激活实验研究。利用绝迹稀释法对内源菌进行了菌浓检测,通过自行设计的厌氧激活装置对内源菌激活过程中的压力、pH值、产气量及气体组分进行了跟踪监测,最后通过物理模拟实验对激活效果进行了验证。结果表明,内源菌厌氧激活效果非常显著,产生了大量的气体,产气率达到了2.4,厌氧激活物理模拟驱油实验提高原油采收率9.55%。

In order to estimate the potential of stimulating indigenous microorganisms in Menggulin Oilfield, anaerobic stimulationexperiment is carried out according to the reservoir conditions and fluid properties. The anaerobic stimulation experiment is conductedwith the own-designed equipment. During cultivation, the cell concentrations of the indigenous microorganisms are enumerated by mostprobable number（MPN）method. The pressure, pH value, gas production and composition are also monitored and the stimulating efficiencyis then evaluated by the physical simulation method. The results suggest that the indigenous microorganisms could thrive andgrow well under the reservoir condition. The gas-producing rate is 2.4 and the result of physical simulation exhibits a total enhanced oilrecovery of 9.55 %.