【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。图5表1参12更多还原

【Abstract】 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 oil-displacement experiments in the emulation micro-models,and manmade 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.更多还原