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页岩气水平井可溶性桥塞室内测试及现场试验
Lab and field tests of dissolvable bridge plug technology in shale-gas horizontal wells
刘 辉1 尹 强1 喻成刚1 肖勇军2 杨云山1 刘 强3
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DOI:
作者单位:1. 中国石油西南油气田公司工程技术研究院 2. 四川长宁天然气开发有限责任公司3. 中国石油西南油气田公司工程技术处
中文关键字:页岩气 水平井 可溶性桥塞 分段压裂 全通径 生产测井
英文关键字:Shale gas; Horizontal well; Dissolvable bridge plug; Staged fracturing; Full bore; Production logging
中文摘要:可溶性桥塞技术既能有效解决复合桥塞钻磨施工投入大、风险高、连油自锁、套管变形等造成桥塞无法钻除而影响
后续生产的难题,又能成功弥补大通径桥塞不能实现井筒全通径,无法开展后期生产测井及重复压裂等作业的不足,可最大程度
保证井筒完整性。通过开展可溶性桥塞室内测试,评价了桥塞可溶材料与现场应用工况的适应性,确保了桥塞能够满足现场压裂
及后期溶解要求。在CNH13-1 井开展了可溶性桥塞现场先导试验,压裂前桥塞泵送、座封丢手正常,压裂时桥塞承压密封性能稳定,
压裂后桥塞溶解性能良好,试验结果基本达到了预期效果。

DOI: 10.12055/gaskk.issn.1673-3177.2018.02.011


英文摘要:Dissolvable bridge plug is superior to composite one because the latter is featured by higher investment in both drilling
and grinding, higher risk, coiled-tubing possible self-locking, and casing deformation frustrating bridge plug to impede subsequent
operations. Moreover, dissolvable one can maintain wellbore integrity to the utmost, so it is also better than large bore bridge plug
which fails to ensure a full bore and thus disables the next production logging and refracturing. In this study, lab test was conducted on
dissolvable bridge plug to evaluate the adaptability of materials to field, so as to guarantee that this one can satisfy the requirements
of site fracturing and later dissolution. Its field pilot test was carried out in CNH13-1 well. And the dissolvable bridge plug was found
with normal pumping and setting before fracturing, stable pressurized sealing performance during fracturing, and successful dissolution
after fracturing. Obviously, these obtained results basically meet expectations.
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国内统一连续出版物号:CN51-1159/TE |国内发行代码: |国际标准出版物号:ISSN1673-3177 |国际发行代码:
主管单位:中国石油西南油气田公司  主办单位:中国石油西南油气田公司勘探开发研究院
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