长庆油田水平井体积压裂工具发展浅析  

Analysis of Volume-fracturing Tools Developed for Horizontal Wells in Changqing Oilfield

作　　者：任勇[1,2] 冯长青[1,2] 胡相君[1,2] 张文星[1,2] 何华[1,2] 蒙鑫[1,2] 赵粉霞[1,2] 

机构地区：[1]低渗透油气田勘探开发国家工程实验室 [2]中国石油长庆油田公司油气工艺研究院

出　　处：《中国石油勘探》2015年第2期75-81,共7页China Petroleum Exploration

基　　金：国家科技重大专项"鄂尔多斯盆地大型低渗透岩性地层油气藏开发示范工程"(2011ZX05044)

摘　　要：长庆油田致密油资源丰富,水平井钻井及体积压裂工艺是主要开发方式,而体积压裂工具是工艺实现的关键。通过对前期水平井分段改造管柱及配套工具对比分析,结合体积压裂工艺在作业排量、多簇射孔方式等方面对工具的要求,重点介绍了水力喷射分段多簇体积压裂工具、大通径快钻桥塞压裂工具和可开关套管滑套压裂工具。结果表明,在139.7mm套管固井完井条件下,当施工总排量低于8m3/min时,水力喷射分段多簇体积压裂工具具有操作简单、作业成本低的优点,成为长庆油田水平井体积压裂主体工具,已规模应用505口油田水平井;当施工排量超过8m3/min时,则采用大通径快钻桥塞压裂工具,该工具压后无需钻磨,可直接放喷、投产,已在长庆油田应用井数42口;而可开关套管滑套压裂工具不仅可以满足大排量压裂改造,还考虑了后期分层测试以及找水、堵水、重复改造等需要,将是最具有发展潜力的工具,它代表着体积压裂工具的发展方向。Changqing Oilfield is rich in tight oil resources. Drilling of horizontal well and volume-fracturing process are the main methods for development. Volume-fracturing tools hold the key to development process. Based on the analysis comparison of the pipe string and support tools used for staged renovation of horizontal wells in the previous stage and combined with the requirements on the tools for volume-fracturing process and cluster perforation, this paper briefs about hydro-jetting cluster-perforating volume-fracturing tools, large-bore and fast-drilling bridge plug fracturing tools and switchable fracturing sliding sleeve tools with casing. The results indicate that hydro-jetting cluster-perforating tools are advantageous for their simple use and low operating cost under the conditions that 139.7 casing is used for cementation and completion and the pumping rate is less than 8m3/min. Therefore, hydro-jetting cluster-perforating tools become the main volume-fracturing tools for volume-fracturing of horizontal wells in Changqing Oilfield. a total of 505 horizontal wells have been fractured by means of these tools. When the pumping rate exceeds 8m3/min, large-bore and fast-drilling bridge plug fracturing tools are used because no drilling is needed after fractured and the wells can be directly put into production. A total of 42 horizontal wells have been fractured by means of such tools. Switchable fracturing sliding sleeve tool with casing, the most potential for development, can not only meet the need for large-rate fracturing renovation but also the need for later-on layered testing, water plugging and repeated renovations, indicating the development orientation for volume-fracturing tools

关 键 词：油田水平井 体积压裂工具 水力喷射分段多簇压裂工具 大通径快钻桥塞 可开关套管滑套压裂工具 

分 类 号：TE934.2[石油与天然气工程—石油机械设备]