扶余油田废弃井层封固技术研究

发布时间：2018-05-09 21:31

本文选题：水泥浆封固 + 封堵参数　；参考：《东北石油大学》2015年硕士论文

【摘要】：扶余油田作为吉林地区最早开发的油田,当前注采老井问题严重,废弃井大多已多年停产不用,在油田开发过程中易产生不良影响。这些报废井需要水泥封井,如果封固不好会导致层间串通,影响后期注水开发效果,后果严重的情况甚至本井或临井会发生套返,短时间内难以及时治理,导致大面积污染。并且,注水井在废弃井点形成二次分配,导致有效注水效率降低,无效水循环问题严重。为此,需要运用优化废弃井井下作业方案设计的方法,进行不同井况类型永久废弃封井工艺技术。本项目对扶余油田中区储层物性特征进行研究,通过室内实验对水泥浆型号和配方进行优选,得出封固水泥浆性能与工艺参数优选。最后通过扫描电子显微镜对3块扶余油田天然岩心进行扫描观察,分析封固前后岩心的微观结构,确定水泥浆封固速凝时间。
[Abstract]:As the earliest oilfield developed in Jilin area, Fuyu Oilfield has serious problems in the old wells of injection and production at present, and most of the abandoned wells have stopped production for many years, which is easy to produce adverse effects in the course of oilfield development. These abandoned wells need cement sealing wells. If the cementing is not good, it will lead to interlayer collusion, which will affect the effect of water injection in the later stage. If the consequences are serious, even the wells or adjacent wells will return, it will be difficult to deal with them in time, resulting in a large area of pollution. Moreover, the secondary distribution of water injection wells at the abandoned well point leads to the reduction of effective water injection efficiency and the serious problem of ineffective water circulation. Therefore, it is necessary to use the method of optimizing the downhole operation scheme design of abandoned wells to carry out the technology of permanent abandoned well sealing with different types of well conditions. This project studies the physical properties of reservoir in the middle area of Fuyu Oilfield, and optimizes the type and formula of cement slurry through laboratory experiments, and obtains the optimum selection of performance and technological parameters of cement slurry. Finally, the scanning electron microscope was used to scan and observe the natural cores in three Fuyu oil fields, and the microstructure of the cores before and after sealing was analyzed, and the cementing time of the cement slurry was determined.
【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】：TE25

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