不同聚表剂驱油机理与渗流规律研究

发布时间：2018-10-10 07:01

【摘要】：聚表剂作为一种非常有前景的化学驱油剂,已经受到了国内外油田以及各大科研院校的关注。聚表剂驱作为聚驱后潜力巨大的三次采油技术,目前已经在国内外矿场取得了一定的成功经验,它解决了三元复合驱中储层结垢的实际问题。虽然已经有部分科研单位开始研究聚表剂这种新型的驱油剂,但是聚表剂的物化性能、渗流规律等等方面并没有得到足够的认识,对于现场试验中出现一些问题还不能给出明确的解释,所以对于聚表剂的性能、驱油机理以及宏观渗流规律还需要做更深层次的研究。本文通过室内实验,首先采用微观光刻玻璃模型分别深入研究三种聚表剂的驱油机理,并且做出对比。通过对这三种聚表剂驱油机理实验的研究和对比,结果表明:华鼎I型聚表剂的阶段波及面积是三种聚表剂中最大的;在洗油效率方面,海博BI型聚表剂是三种聚表剂中最好的,炼化III型聚表剂在波及面积和洗油效率上都不突出,这说明在本文的实验条件下,炼化III型聚表剂并不适合。本文还对聚表剂的稳定性和抗盐性物化性质进行了研究,并且在此基础上对聚表剂的注入能力进行了研究,以注入能力实验为基础优选出了三种聚表剂的最佳注入浓度和注入段塞,这三种聚表剂的最佳注入浓度均为1000mg/L,最佳注入段塞均为0.7PV。根据优选出的浓度和段塞,设计室内实验研究其渗流规律,实验采用四层加厚非均质岩心,实验结果表明:聚驱后华鼎聚表剂驱生产压差明显高于海博,低渗与高渗分流率存在振荡变化趋势,海博驱替过程中分流率情况相对平缓。华鼎I型聚表剂对剩余油动用程度更大;饱和度模型驱替实验表明:华鼎I聚表剂对中低渗透层的动用程度高于海博聚表剂,而海博BI聚表剂在中低渗透层波及体积大于华鼎I聚表剂。本文所取得的认识,对现场实际应用提供了理论基础,并且对现场实际应用具有指导意义。
[Abstract]:As a promising chemical oil displacement agent, Polymer has been paid attention to by oil fields and scientific research institutes at home and abroad. As a tertiary oil recovery technology with great potential after polymer flooding, polymer flooding has already obtained certain successful experience at home and abroad, which has solved the practical problem of reservoir scaling in ASP flooding. Although some scientific research institutions have begun to study the polymer as a new type of oil displacement agent, but the physical and chemical properties of the polymer, the percolation law, and so on, have not been fully understood. Some problems in the field test can not be explained clearly, so the performance of the polymer, the oil displacement mechanism and the macroscopic percolation law need to be further studied. In this paper, the oil displacement mechanism of the three kinds of polymer is studied and compared with the microscopic lithography glass model through laboratory experiments. Through the experimental study and comparison of the oil displacement mechanism of these three kinds of polymeter agents, the results show that the phase sweep area of Huadin I polymeter agent is the largest of the three kinds of polymeter agents, and the oil washing efficiency, Haibo BI type polymeter agent is the best of the three kinds of polymeter agents. The sweep area and oil washing efficiency of refining III type polymeter agent are not outstanding, which shows that the refining III type polymeter agent is not suitable under the experimental conditions in this paper. The stability and the physical and chemical properties of salt resistance of the polymer were also studied, and the injection ability of the polymer was also studied. Based on the experiment of injection ability, the optimal injection concentration and slug of the three kinds of polymer were selected. The optimum injection concentration of these three kinds of polymer was 1000mg / L, and the optimal injection slug was 0.7PV. According to the selected concentration and slug, the percolation law is studied experimentally in the design room, and the four layers thickened heterogeneous core is used in the experiment. The experimental results show that the production pressure difference of Huading polymeter flooding after polymer flooding is obviously higher than that of Haibo. There is a trend of oscillatory variation in low permeability and high permeability distributary rate, and the distributary rate is relatively flat during Haibo flooding. The saturation model displacement experiment shows that Huadin I polymeter agent is more effective than Haibo polymeter agent in the low and middle permeable layers, and the saturation model displacement experiment shows that the production degree of Huadin I polymeter agent is higher than that of Haibo polymeter agent. However, the sweep volume of Haibo BI in low and medium permeable layer is larger than that of Huadin I. The knowledge obtained in this paper provides a theoretical basis for the practical application in the field and has a guiding significance for the practical application in the field.
【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】：TE357.46;TE312

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