一种微生物采油功能性激活剂激活特性及驱油性能*

Activation Characteristics and Oil Displacement Performance of a New Functional Activator

陈琼瑶 刘 涛 于 瑶 李彩风 曹嫣镔 林军章

CHEN Qiongyao LIU Tao YU Yao LI Caifeng CAO Yanbin LIN Junzhang

为了解决常规激活剂在油藏深部的激活作用较弱的问题，胜利油田石油工程技术研究院研发了以长碳链高分子多糖为碳源的长效功能性激活剂，本文研究了该功能性激活剂的好氧激活、厌氧激活特性及该功能激活剂的驱油效果。研究结果表明，该功能性激活剂激活后菌数达到5×108个/mL以上，延长激活时间超过60 d，好氧激活微生物后乳化指数高达95%，厌氧激活微生物后产气压力达到0.058 MPa。经功能性激活剂激活后微生物代谢产物对原油的乳化分散及产气效果明显提高，功能性激活剂驱替岩心后在空白基础上提高驱替效率14.1%，比常规激活剂的提高4.5%，且岩心内剩余油明显向岩心出口端运移。功能性激活剂能够有效激活好氧及厌氧微生物生长代谢产生驱油作用，具有广阔的现场应用前景。图6表3参19

In order to solve the problem of weak activation of conventional activators in deep reservoir，Shengli oilfield petroleum engineering technology research institute has developed a long-term functional activator with long carbon chain polymer polysaccharide as carbon source. The research on the aerobic activation，anaerobic activation and oil displacement effect of functional activator was carried out. The results showed that after the activation of functional activator，the number of bacteria was more than 5×108 cells/mL and the activation time was extended more than 60 days. The emulsification index of aerobic activated microorganism was as high as 95%. After anaerobic activation of microorganism，the gas production pressure reached 0.058 MPa. After activated by functional activator，the emulsification and gas production of crude oil by microbial metabolites were obviously improved. After the core was displaced by the functional activator，the displacement efficiency was increased by 14.1% on the basis of blank，which was 4.5% higher than that of conventional activator，the remaining oil in the core obviously migrated to the outlet end of the core. The functional activators could activate effectively the aerobic and anaerobic microorganisms to displace the crude oil with a broad field application prospect.

10.19346/j.cnki.1000-4092.2020.01.022