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水平井化学驱挖潜聚驱后侧积夹层剩余油研究

Research on Using Horizontal Well with Chemical Flooding to Exploit Remaining Oil of Side Interlayer after Polymer Flooding

作者: 专业:油气田开发工程 导师:陈涛平 年度:2015 学位:硕士  院校: 东北石油大学

Keywords

Side Interlayer, Horizontal Well, High Concentration Polymer Flooding, Variable Concentration Polymer Flooding, Polymer Activator Alternating Flooding

        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。
    In order to study the influence of horizontal well with chemical flooding on remaining oil of side interlayer after polymer flooding, physical model studies about water well of vertical well inject high concentration polymer solution while horizontal well product, oil well of vertical well inject high concentration polymer solution while horizontal well product and oil well and water well of vertical well inject high concentration polymer solution together while horizontal well product are completed, after determining optimum position of horizontal well and way of injection and production of water flooding and polymer flooding, in order to determine optimum way of injection and production of chemical flooding after polymer flooding. After determining optimum way of injection and production of chemical flooding after polymer flooding, studies about horizontal well with variable concentration polymer flooding and horizontal well with polymer activator alternating flooding are completed. In this section, firstly eclipse numerical simulation software is used to build model, calculate the result of horizontal well with high concentration polymer flooding, which will be used as foundation method, secondly study the influence of different concentration combination of different polymer slug on flooding effect under the condition of injection total amount of polymer are the same and injection amount of different polymer slug are the same, study the influence of different concentration combination of different polymer slug on flooding effect under the condition of injection total amount of polymer are the same and injection volume of different polymer slug are the same, study the influence of different concentration combination of different polymer slug on flooding effect under the condition of injection total amount of polymer are different and injection volume of different polymer slug are the same; finally select a optimum method to do physical model study, compare two results, and give the conclusion. After that, physical model study about horizontal well with polymer activator alternating flooding is completed. Results show that the method of oil well and water well of vertical well inject high concentration polymer solution together while horizontal well product is the optimum method of injection and production of chemical flooding after polymer flooding. The three methods all can improve recovery efficiency of side interlayer after polymer flooding effectively; the method of horizontal well with variable concentration polymer flooding compared with the method of high concentration polymer flooding, the improved recovery efficiency difference is small because injection total amount of polymer is the same; the method of horizontal well with polymer activator alternating flooding can not only enlarge sweep volume, but also improve the efficiency of wash oil, enhance recovery efficiency obviously, when compared with the method of high concentration polymer flooding, is the optimum method of exploitation for remaining oil of side interlayer after polymer flooding.
        

水平井化学驱挖潜聚驱后侧积夹层剩余油研究

摘要4-5
ABSTRACT5
创新点摘要6-9
第一章 绪论9-15
    1.1 研究目的及意义9
    1.2 研究现状9-14
        1.2.1 侧积夹层的成因及识别9-11
        1.2.2 侧积夹层对剩余油的影响11-13
        1.2.3 水平井挖潜侧积夹层剩余油13-14
    1.3 研究内容14-15
第二章 化学驱原理概述15-22
    2.1 聚合物及聚合物驱15-19
        2.1.1 聚合物溶液的性质15-17
        2.1.2 聚合物溶液的驱油原理17-19
    2.2 表面活性剂及表面活性剂驱19-22
        2.2.1 表面活性剂的分类19-21
        2.2.2 表面活性剂的驱油原理21-22
第三章 不同注采方式挖潜聚驱后侧积夹层剩余油物模研究22-30
    3.1 物模设备22
    3.2 物模材料22-23
        3.2.1 物模岩心22
        3.2.2 物模流体22-23
    3.3 物模方案23
    3.4 物模步骤23-24
    3.5 物模结果24-30
        3.5.1 直井水井注-水平井采24-26
        3.5.2 直井油井注-水平井采26-27
        3.5.3 直井油水井合注-水平井采27-28
        3.5.4 三种注采方式对比分析28-30
第四章 不同化学驱挖潜聚驱后侧积夹层剩余油研究30-60
    4.1 水平井-变浓度聚驱挖潜聚驱后侧积夹层剩余油数模研究30-55
        4.1.1 数模模型的建立及基础方案的计算30-32
        4.1.2 聚合物总量不变,各级质量相同,各级浓度组合不同32-42
        4.1.3 聚合物总量不变,各级体积相同,各级浓度组合不同42-45
        4.1.4 聚合物总量不同,各级体积相同,各级浓度组合不同45-55
        4.1.5 不同前提下,各级不同浓度组合对比分析55
    4.2 水平井-变浓度聚驱挖潜聚驱后侧积夹层剩余油物模研究55-57
        4.2.1 物模方案56
        4.2.2 物模步骤56
        4.2.3 物模结果56-57
    4.3 水平井-聚表交替驱挖潜聚驱后侧积夹层剩余油物模研究57-59
        4.3.1 物模流体—活性剂57
        4.3.2 物模方案57
        4.3.3 物模步骤57-58
        4.3.4 物模结果58-59
    4.4 三种挖潜方式对比分析59-60
结论60-61
参考文献61-65
发表文章目录65-66
致谢66-67
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