微生物降解HPAM的机理及其应用  

Mechanism of HPAM-biodegradation and its application

作　　者：李宜强[1] 沈传海[2] 景贵成[1] 胡锦强[1] 

机构地区：[1]大庆石油学院提高油气采收率教育部重点实验室 [2]长庆油田第三采油技术服务处

出　　处：《石油勘探与开发》2006年第6期738-742,共5页Petroleum Exploration and Development

基　　金：黑龙江省青年科学技术专项基金资助项目(0C05C17)

摘　　要：为了开发廉价、长效、环保和安全的解堵剂以解除聚合物对近井地带的堵塞,从油田含聚合物产出液中分离出能降解聚合物的混合菌株进行室内性能评价实验。混合菌群由假单胞菌ML1、梭状芽孢杆菌ML2和ML3组成。菌群降解部分水解聚丙烯酰胺(HPAM)的静态实验、微观仿真模型实验及岩心流动实验表明,微生物可降解长链大分子聚合物,解除近井堵塞,提高孔道连通性,增加产液量,从而带动单井产油量的增加,在注聚合物驱油的基础上提高原油采收率达11.9%。矿场应用结果,经过微生物解堵,注水井注入压力明显下降,采油井产液量显著提高,有效期达到540d以上。To develop a water block remover of low-cost, long-term effect, environmental protection and safety, and of being able to relieve the block caused by polymer near well-bore, the evaluation experiments were carried out indoors using the mixed strains separated from the polymer-bearing produced liquid in an oilfield. The mixed strains consist of pseudomonas sp. ML1, clostridia sp. ML2 and ML3. The static experiments with HPAM biodegradation, the oibdisplacement experiments in the emulation micromodels, and man-made cores indicated that the microbes could degrade the long-chained high-molecular polymer, release the block near well-bore, improve the communication of the pores and channels and increase the productivity, thus improving the single-well production. The final oil recovery was increased by 11.9 % on what has already been achieved with polymer flooding. The field test demonstrated that after the damage removal by using the microbes, the injection pressure of injectors reduced, the liquid production of producers increased, and the effective period was up to more than 540 days.

关 键 词：微生物降解 聚合物 解堵 矿场试验 

分 类 号：TE327[石油与天然气工程—油气田开发工程]