三次采油用小分子自组装超分子体系驱油性能

发布时间：2019-05-22 17:47

【摘要】：胜利油区三类油藏由于温度和矿化度较高,常规聚丙烯酰胺驱油剂无法在该类油藏条件下取得较好的驱油效果。为此,利用自制的超分子主剂和辅剂,研制耐温抗盐非聚丙烯酰胺类新型超分子体系,并对其基本性能、驱油效果及微观聚集形态进行分析。研究结果表明:超分子体系利用小分子之间的自组装,能够形成和常规聚丙烯酰胺一样致密的网络聚集体;在胜利油区三类油藏条件下,超分子体系质量分数为0.1%~0.25%时相对于常规聚丙烯酰胺,粘度提高1倍以上;不除氧条件下,超分子体系在30 d内粘度保持稳定;超分子体系质量分数为0.15%时的单管物理模拟实验能提高采收率18%以上;因此,超分子体系是一种非常有前景且能适用于胜利油区高温高盐油藏的新型驱油体系。
[Abstract]:Due to the high temperature and salinity of the three kinds of reservoirs in Shengli oil area, the conventional polyacrylamide oil displacement agent can not achieve good oil displacement effect under the conditions of this kind of reservoir. Therefore, a new supramolecular system of temperature-resistant and salt-resistant non-polyacrylamide was developed by using self-made supramolecular main agent and auxiliary agent, and its basic properties, oil displacement effect and microscopic aggregation morphology were analyzed. The results show that the supramolecular system can form as dense network aggregates as conventional polyacrylamide by using the self-assembly between small molecules. Under the condition of three kinds of reservoirs in Shengli oil field, the viscosity of supramolecular system is more than 1 times higher than that of conventional polyacrylamide when the mass fraction of supramolecular system is 0.1% ~ 0.25%, and the viscosity of supramolecular system is stable within 30 days without oxygen removal. When the mass fraction of supramolecular system is 0.15%, the single tube physical simulation experiment can improve the oil recovery by more than 18%. Therefore, supramolecular system is a new type of oil displacement system which is very promising and can be applied to high temperature and high salt reservoirs in Shengli oil area.
【作者单位】：中国石化胜利油田分公司勘探开发研究院;
【基金】：国家科技重大专项“高温高盐油田化学驱提高采收率技术”(2016ZX05011)
【分类号】：TE39

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