The utility model discloses a sectional fracturing experimental device for a horizontal well in shale layer, which comprises a simulated well bore, an experimental core, a core holder and a fracturing pump. The experimental core is arranged in the core holder and has a hole, the simulated well bore is arranged in the hole of the experimental core, the simulated well bore includes an inner bore and an outer bore, the outer bore is provided with an inner thread, the inner bore is provided with an outer thread, and the outer bore is also provided with an outer thread A plurality of water outlet holes are arranged on the inner cylinder, the inner cylinder is connected with the fracturing pump, and the upper part of the outer cylinder is provided with a clamping groove group, in which a plurality of clamping grooves are arranged, and at the same time, a clamping plate matched with the clamping groove is arranged. The utility model makes the well bore fixed on the core holder by setting a clamp plate and a clamp groove, the whole experimental process is safer, the installation process is faster, more convenient, and time-saving; the installation length of the well bore can also be adjusted according to the depth of the inner hole of the experimental core; the drainage pipe can be set to observe the discharge of the fracturing fluid, and can enter after the fracturing test Displacement experiment was carried out.
【技术实现步骤摘要】
一种页岩层水平井分段压裂实验装置
本技术涉及地层压裂
,具体涉及一种页岩层水平井分段压裂实验装置。
技术介绍
压裂是油气藏增产改造的重要手段,随着以页岩气和致密油为代表的非常规油气资源的开采,水平井分段压裂技术已经得到大规模应用。水平井分段压裂是指根据储层的物性特征针对水平井段不同位置地层进行分段压裂,用多段压裂增大裂缝与地层的接触面积,获得较高的初始产量和提高最终采收率。目前,国内外众多学者对压裂裂缝进行了大量实验研究,但大多数仅能实现单井单端压裂的物理模拟。中国专利CN207686702U公开了一种水平井分段水力压裂实验中可循环实用的压裂管装置,该装置通过在内井筒和外井筒上设置螺纹,同时内井筒和外井筒上开设有出水孔,通过出水口注入压裂液,实现重复开展水平井段水力压裂试验的目的。但该专利存在着安装繁琐的问题,为了防止试验时井筒受到的压力过高而被压出,造成安全隐患,实施该专利时需要事先在井筒上涂抹AB胶,通过AB胶的粘接力来固定井筒。但是该方法较为繁琐,且AB胶在高温高压下容易失活,存在安全隐患。
技术实现思路
鉴于以上技术问题,本技术的目的在于提供一种页岩层水平井分段压裂实验装置,解决内外筒在实验岩心中的固定问题。本技术采用以下技术方案为:一种页岩层水平井分段压裂实验装置,包括模拟井筒、实验岩心、岩心夹持器和压裂泵,所述实验岩心设于岩心夹持器内且开有井筒安装孔,所述模拟井筒设于实验岩心的孔内,所述模拟井筒包括内筒和外筒,所述外筒内设有内螺纹,对应的,所述内筒上设 ...
【技术保护点】
1.一种页岩层水平井分段压裂实验装置,包括模拟井筒、实验岩心、岩心夹持器和压裂泵,所述实验岩心设于岩心夹持器内且开有孔,所述模拟井筒设于实验岩心的孔内,所述模拟井筒包括内筒和外筒,所述外筒内设有内螺纹,对应的,所述内筒上设有外螺纹,同时外筒上还设有多个外出水孔,所述内筒上设有内出水孔,所述内筒连接压裂泵,其特征在于,所述外筒上部外表面设有卡槽组,卡槽组中设有数个卡槽,同时还设有与卡槽匹配的卡板。/n
【技术特征摘要】
1.一种页岩层水平井分段压裂实验装置,包括模拟井筒、实验岩心、岩心夹持器和压裂泵,所述实验岩心设于岩心夹持器内且开有孔,所述模拟井筒设于实验岩心的孔内,所述模拟井筒包括内筒和外筒,所述外筒内设有内螺纹,对应的,所述内筒上设有外螺纹,同时外筒上还设有多个外出水孔,所述内筒上设有内出水孔,所述内筒连接压裂泵,其特征在于,所述外筒上部外表面设有卡槽组,卡槽组中设有数个卡槽,同时还设有与卡槽匹配的卡板。
2.根据权利要求1所述的页岩层水平井分段压裂实验装置,其特征在于,所述卡槽组绕外筒轴心均匀设有数组,所有卡槽组内的卡槽数量均相同。
3.根据权利要求2所述的页岩层水平井分段压裂实验装置,其特征在于,所述卡槽组中的卡槽均从上到下依次等间距设置。
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