连续管密切割压裂工艺技术实践与应用
投稿时间:2021-02-23  修订日期:2021-06-29  点此下载全文
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侯景龙 大庆油田有限责任公司井下作业分公司 163453
王传庆 大庆油田有限责任公司第七采油厂 
李玉东 大庆油田有限责任公司井下作业分公司 
刘岩 大庆油田有限责任公司井下作业分公司 
中文摘要:外围扶余和高台子致密油储层,孔隙度低,渗透率小于0.01mDc,基质物性差,常规完井后难以有效动用,必须进行体积压裂改造才能开发。以往该类储层采用“水平井(水平段1600m)+桥塞”多簇体积压裂方式,针对性不强、施工时效低。针对以上储层特点以及开发过程中压裂工艺技术存在的问题,研究了以“缝控储量最大化”为目标、利用连续管携带底封工具,单簇单压、密集切割连续管压裂工艺,增加有效SRV,提高改造效果。该技术在173-86区块现场应用实践了4口井,工艺获得显著提升, Q196-P2 单井切割压裂完成118段,是目前国内单井切割段数之最,压后均套管自喷生产,改造效果明显。
中文关键词:密切割 缝控 连续管 喷枪
 
Practice and application of the technology intensive cutting fracturing by coiled tubing
Abstract:Fuyu and Gaotaizi tight oil reservoir have the characteristic of low porosity, the permeability is less than 0.01mDc, the reservoir property is poor, so the conventional well completion cannot achieve the effective development, the only way is stimulated reservoir volume. In the past, this kind of reservoir used SRV fracturing with multi gunpowder perforating and bridge plug by cable in approximately 1600 metre horizontal section, so the targeted strategy and the fracturing operation are inefficiency. According to these properties of both reservoirs and these problems in fracturing technology, research the new coiled tubing fracturing technique with the target of obtain the maximum production in every fracturing crack, implementing separate perforation and separate fracturing to each cluster, and intensive cutting with small space, by the Y211 bottom hole assembly. Through the above measures, increase effective SRV, improve the effect of fracturing. This tech has been applied in 4 wells in 173-86 block, and the output has increased significantly. The well of Q196-P2 has been fractured up to 118 sections, is now the most cutting section in one well in China. All the wells are natural flow producting by casing after fracturing measures, so the effect of this tech is obvious.
keywords:coiled tubing intensive cutting fracture control ejection gun
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