水平井化学驱挖潜聚驱后侧积夹层剩余油研究

发布时间：2018-04-28 14:50

本文选题：侧积夹层 + 水平井　；参考：《东北石油大学》2015年硕士论文

【摘要】：为了研究水平井化学驱对聚驱后侧积夹层剩余油作用的实际效果,在优选水平井位置,确定水驱聚驱注采方式后,进行了直井水井注-水平井采、直井油井注-水平井采和直井油水井合注-水平井采高浓度聚驱三个方案的物模研究,来确定聚驱后化学驱的最佳注采方式。在最佳注采方式确定后,又进行了水平井-变浓度聚驱和水平井-聚表交替驱两个方案的研究。在这一部分,首先应用Eclipse数值模拟软件建立模型,计算出水平井-高浓度聚驱结果,并以此作为基础方案;其次在聚合物注入总量不变,各级聚合物段塞注入质量相同的前提下,研究各级聚合物段塞不同浓度组合对驱油效果的影响;在聚合物注入总量不变,各级聚合物段塞注入体积相同的前提下,研究各级聚合物段塞不同浓度组合对驱油效果的影响;在聚合物注入总量不同,各级聚合物段塞注入体积相同的前提下,研究各级聚合物段塞不同浓度组合对驱油效果的影响;最后选出一最佳方案进行物模研究,并将二者相对照,得出最终结论。之后又进行了水平井-聚表交替驱物模研究。结果表明直井油水井合注-水平井采方案为聚驱后化学驱的最佳注采方案。水平井-高浓度聚驱、水平井-聚表交替驱和水平井-变浓度聚驱三个方案均能有效地提高聚驱后侧积夹层采收率;水平井-变浓度聚驱方案与水平井-高浓度聚驱方案相比,由于聚合物注入总量保持不变,所以采收率提高值差异不大;水平井-聚表交替驱方案相比水平井-高浓度聚驱方案既能扩大波及体积,又能提高洗油效率,提高采收率效果明显,为聚驱后侧积夹层剩余油最佳挖潜方案。
[Abstract]:In order to study the effect of chemical flooding in horizontal wells on residual oil in lateral interlayers after polymer flooding, after selecting the location of horizontal wells and determining the injection and production mode of water flooding, the injection-horizontal production of straight wells was carried out. In order to determine the best injection and production mode of chemical flooding after polymer flooding, the three schemes of high concentration polymer flooding in vertical well injection-horizontal well and vertical oil and water well combined injection and horizontal well were studied. After the determination of the best injection and production mode, two schemes of horizontal well variable concentration flooding and horizontal well aggregate table alternate flooding are studied. In this part, the Eclipse numerical simulation software is used to establish the model, and the results of horizontal well and high concentration polymer flooding are calculated, which is taken as the basic scheme, and then the total amount of polymer injection is not changed. Under the same injection quality of polymer slug, the effect of different concentration combinations of polymer slug on displacement effect is studied, when the total amount of polymer injection is constant and the volume of polymer slug injection is the same, The effect of different concentration combinations of polymer slug on oil displacement effect is studied, and the effect of different concentration combinations of polymer slug on displacement effect is studied under the premise of different polymer injection amount and the same injection volume of each polymer slug. At last, an optimal scheme is selected to study the physical model, and the final conclusion is drawn by comparing the two. After that, the model of horizontal well and aggregate table displacement was studied. The results show that the combined injection-horizontal well recovery scheme is the best scheme for chemical flooding after polymer flooding. The three schemes of horizontal well- high concentration polymer flooding, horizontal well-table alternating flooding and horizontal well-variable concentration polymer flooding can effectively improve the recovery efficiency of lateral interlayer after polymer flooding, and the horizontal well-variable concentration polymer flooding scheme is compared with the horizontal well-high concentration polymer flooding scheme. Since the total amount of polymer injection remains constant, there is no significant difference in oil recovery improvement. Compared with horizontal well and high concentration polymer flooding, the horizontal well / polymeter alternative flooding scheme can not only enlarge the sweep volume, but also improve the efficiency of oil washing. The effect of oil recovery is obvious, which is the best way to tap the potential of residual oil in lateral interlayer after polymer flooding.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE357.46

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