低渗透油田微生物代谢产物驱油技术研究

发布时间：2018-06-17 11:23

  本文选题：低渗透 + 微生物驱油　； 参考：《东北石油大学》2017年硕士论文

【摘要】：微生物在代谢过程中会产生生物聚合物与生物表面活性剂,通常我们采用其中一种方式进行微生物驱油,微生物复合驱就是在此基础上,将两种代谢产物进行复合注入油藏进行驱油的一种新技术。微生物复合驱首分为两个部分——地面部分和地上部分,其中在地面筛选出合适的生物表面活性剂产生菌与生物聚合物产生菌并进行发酵培养,获得复合体系菌液,然后将复合体系菌液进行室内物理模拟实验评价,之后在将优选出的复合体系注入油藏目的区块中进行驱油,通过扩大波及体积和采油效率进而提高原油采收率。微生物复合驱具有微生物驱油的环保、投入成本低等特点,同时又具有二元复合驱的耦合作用的优势,尤其适用于化学驱受限制的低渗透油藏。本文从目的区块油井产出水中分离筛选出6株菌种,并对这六株菌株进行了油藏配伍性评价与发酵培养条件优化,然后优选出一种产表面活性剂菌种SC4和产聚合物菌种SC6,分别对SC4和SC6菌种进行了鉴定和生长、代谢条件进行了研究,并优化了培养基配方和发酵条件。研究结果表明,2株菌种均能够适应低渗透油田的地质环境。之后通过室内岩心物理模拟实验,研究了微生物二元复合体系浓度、用量、注入时机等参数对提高原油采收率的影响,实验结果表明对于低渗透油藏水驱后,采用微生物复合驱可进一步增加原油产量,最后通过数值模拟研究优化了现场试验方案和效果评价。
[Abstract]:Biopolymers and biosurfactants are produced in the metabolic process of microbes, and we usually use one of the methods for microbial oil displacement, and microbial compound flooding is based on this. A new technique for oil displacement by injecting two metabolites into a reservoir. The microbial compound flooding is divided into two parts: the surface part and the aboveground part, in which the suitable biosurfactant producing bacteria and biopolymer producing bacteria are screened out on the ground, and the fermentation culture is carried out to obtain the bacteria liquid of the compound system. Then the bacterial fluid of the composite system is evaluated by physical simulation experiment in laboratory, and then the selected composite system is injected into the target block of the reservoir for oil displacement. The oil recovery can be improved by expanding the sweep volume and oil recovery efficiency. Microbial compound flooding has the characteristics of environmental protection and low input cost of microbial flooding, and it also has the advantages of coupling of binary compound flooding, which is especially suitable for low permeability reservoirs restricted by chemical flooding. In this paper, six strains were isolated from the water produced from the oil wells in the target block, and the reservoir compatibility of the six strains was evaluated and the fermentation culture conditions were optimized. Then, a surfactant producing strain SC4 and a polymer producing strain SC6 were selected. The strain SC4 and SC6 were identified and grown, and the metabolic conditions were studied, and the medium formulation and fermentation conditions were optimized. The results show that the two strains can adapt to the geological environment of low permeability oil fields. Then, the effects of the concentration, dosage and injection time of microbial binary composite system on oil recovery were studied through the laboratory core physical simulation experiment. The experimental results show that after water flooding in low permeability reservoir, Microbial compound flooding can further increase crude oil production. Finally, the field test scheme and effect evaluation are optimized by numerical simulation.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TE357.9
，

本文编号：2030866