E-mail Alert
Research and application of sand-flushing with foam fluid for horizontal wells
-
摘要: 水平井冲砂作业时由于地层压力较低冲砂液漏失严重，泡沫流体冲砂技术可以有效减轻低压水平井的漏失问题，提高冲砂效率。通过实验和数值模拟方法研究了泡沫流体的携砂能力，得到了泡沫流体的携砂规律，并进行了现场应用。研究结果表明：当泡沫特征值为0.85时泡沫流体的黏度达到最大值1.14 Pa·s，直径为0.5 mm的砂粒的沉降速度为10-4~10-3 m/s，几乎可以悬浮在泡沫中；在接近水平的环空管道，泡沫流体的携砂性能远大于混气水和水的携砂性能，泡沫流体更适合于水平井的冲砂洗井。现场应用实例证实了泡沫能有效防止地层漏失，顺利建立起油套循环，作业后产量有较大幅度的增加，泡沫流体冲砂洗井技术是清除低压水平井井底出砂的一项有效措施，对现场具有指导意义。Abstract: Sand-flushing with foam fluid can effectively reduce leakage of flushing fluid in horizontal wells with low pressure. Sand carrying ability of foam fluid is studied by experiment and numerical simulation. When foam quality is 0.85, the maxmum of viscosity of foam fluid is 1.14 Pa·s. Falling velocity of sand with diameter 0.5 mm is from 10-4 m/s to 10-3 m/s. The sand could nearly suspend in foam fluid. In the annular pipeline closing to horizontal well, sand carrying ability of foam fluid is much better than that of aerated water and water, and it is especially suitable for sand cleanout of horizontal well. It can be seen from site applications that sand cleanout with foam fluid could prevent formation from leakage, and set up circulation between casing and tubing effectively. Oil production can be recovered soon after sand cleanout operation, and oil production rate can be improved. Sand cleanout with foam fluid is an effective method to remove bottom-hole produced sand of horizontal wells.
-
Key words:
- horizontal well /
- foam fluid /
- sand cleanout /
- sand carrying ability /
- site application
-
[1] ［1］OZBAYOGLU Evren M, MISKA Stefan Z. Cuttings transport with foam in horizontal & highly-inclined wellbores［R］. SPE 79856, 2003.
［2］SAINTPERE Stephane, MARCILLAT Yannick. Hole cleaning capabilities of foams compared to conventional fluids［R］. SPE 63049, 2000.
［3］李治龙，钱武鼎.我国油田用泡沫流体综述［J］.钻井液与完井液，1994，11（1）：1-5.
LI Zhilong, QIAN Wuding. Survey on the application of foam fluid in China oilfield［J］. Drilling Fluid & Completion Fluid, 1994, 11（1）: 1-5.
［4］刘伟，董胜祥，曹子龙.泡沫洗井工艺的研究及应用［J］.钻采工艺，2002，25（2）：45-49.
LIU Wei, DONG Shengxiang, CAO Zilong. Research and application of foam well flushing technology［J］. Drilling & Production Technology, 2002, 25（2）: 45-49.
［5］杨虎，江勇，胡军，等.牛102井欠平衡泡沫水平井钻井技术［J］.石油学报，2002，23（1）：88-93.
YANG Hu, JIANG Yong, HU Jun, et al. The application of UBD technique in horizontal section of well Niu 102［J］. Acta Petrolei Sinica, 2002, 23（1）: 88-93.
［6］李克向.保护油气层钻井完井技术［M］.北京：石油工业出版社，1993.
LI Kexiang. Drilling and completion technology for protecting oil and gas formation［M］. Beijing: Petroleum Industry Press, 1993.
［7］杨肖曦，李松岩，林日亿，等.泡沫流体携砂能力的数值模拟［J］.中国石油大学学报：自然科学版，2006，30（3）： 89-92.
YANG Xiaoxi, LI Songyan, LIN Riyi, et al. Numerical simulation for prop-carrying capacity of foam fluid［J］. Journal of China University of Petroleum: Edition of Natural Science, 2006, 30（3）: 89-92. ［1］OZBAYOGLU Evren M, MISKA Stefan Z. Cuttings transport with foam in horizontal & highly-inclined wellbores［R］. SPE 79856, 2003.
［2］SAINTPERE Stephane, MARCILLAT Yannick. Hole cleaning capabilities of foams compared to conventional fluids［R］. SPE 63049, 2000.
［3］李治龙，钱武鼎.我国油田用泡沫流体综述［J］.钻井液与完井液，1994，11（1）：1-5.
LI Zhilong, QIAN Wuding. Survey on the application of foam fluid in China oilfield［J］. Drilling Fluid & Completion Fluid, 1994, 11（1）: 1-5.
［4］刘伟，董胜祥，曹子龙.泡沫洗井工艺的研究及应用［J］.钻采工艺，2002，25（2）：45-49.
LIU Wei, DONG Shengxiang, CAO Zilong. Research and application of foam well flushing technology［J］. Drilling & Production Technology, 2002, 25（2）: 45-49.
［5］杨虎，江勇，胡军，等.牛102井欠平衡泡沫水平井钻井技术［J］.石油学报，2002，23（1）：88-93.
YANG Hu, JIANG Yong, HU Jun, et al. The application of UBD technique in horizontal section of well Niu 102［J］. Acta Petrolei Sinica, 2002, 23（1）: 88-93.
［6］李克向.保护油气层钻井完井技术［M］.北京：石油工业出版社，1993.
LI Kexiang. Drilling and completion technology for protecting oil and gas formation［M］. Beijing: Petroleum Industry Press, 1993.
［7］杨肖曦，李松岩，林日亿，等.泡沫流体携砂能力的数值模拟［J］.中国石油大学学报：自然科学版，2006，30（3）： 89-92.
YANG Xiaoxi, LI Songyan, LIN Riyi, et al. Numerical simulation for prop-carrying capacity of foam fluid［J］. Journal of China University of Petroleum: Edition of Natural Science, 2006, 30（3）: 89-92. -
点击查看大图
计量
- 文章访问数: 2942
- HTML全文浏览量: 15
- PDF下载量: 48
- 被引次数: 0
下载:
