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| 深水钻井气侵溢流发展规律及隔水管气侵监测优势 |
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许玉强1,2,金衍2,管志川1,刘永旺1,王晓慧1,张波1,胜亚楠1
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(1.中国石油大学(华东)石油工程学院,山东青岛 266580;2.中国石油大学(北京)石油工程学院,北京 102249)
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| 摘要: |
| 随着石油勘探开发迈向深水超深水,利用隔水管的长度优势、在隔水管底部对气侵进行早期监测的新思路成为研究的热点之一。从深水钻井气侵气体运移的基本规律出发,通过建立深水钻井井筒气液两相流计算模型,分析不同水深、泥线以下深度、井底压差、地层渗透率等工况下气侵气体的运移规律及其与溢流量的关系。结果表明:对于水深大于800 m、泥线以下深度小于2800 m、地层渗透率小于50×10-3μm2的深水钻井,在隔水管底部对气侵进行监测比常规的泥浆池液面监测法更具时效性优势,且水深越深,泥线以下深度越小,地层渗透率越小,井底压差越小,该优势越明显。 |
| 关键词: 深水钻井 气侵溢流 泥浆池增量 气侵早期监测 隔水管 |
| DOI：10.3969/j.issn.1673-5005.2019.01.007 |
| 分类号::TE 52 |
| 文献标识码:A |
| 基金项目:国家自然科学基金面上项目(51574275);国家自然科学基金青年项目(51704320);中央高校基本科研业务费专项(18CX02164A); 中国博士后科学基金项目(2017M611110) |
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| Evolution of gas kick and overflow in wellbore during deepwater drilling and advantage analysis of early gas kick detection in riser |
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XU Yuqiang1,2, JIN Yan2, GUAN Zhichuan1, LIU Yongwang1, WANG Xiaohui1, ZHANG Bo1, SHENG Yanan1
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(1.School of Petroleum Engineering in China University of Petroleum(East China), Qingdao 266580, China;2.College of Petroleum Engineering in China University of Petroleum(Beijing), Beijing 102249, China)
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| Abstract: |
| For oil and gas well-drilling in deepwater and ultra deepwater, the idea of making use of the advantage of the long length of the riser to monitor gas kicks at the bottom of the riser has become one of the hot spots for research. In this study, the flow and migration gas in wellbore were analyzed, considering the effects of water depth, drilling depth below the mud line, bottom hole pressure difference, formation permeability, and a two-phase flow model of gas-liquid in wellbore was established. The simulation results indicate that monitoring of the gas kicks at the bottom of the riser is more effective than that using the conventional mud level method in deepwater drilling under the conditions of water depth greater than 800 m, the drilling depth less than 2800 m below the mud line, and the formation permeability less than 50×10-3 μm2. Moreover, the deeper the water depth, the less of the drilling depth below the mud line and the smaller of the formation-bottom hole pressure difference, the more effective of the riser monitoring technique. |
| Key words: deepwater drilling gas kick and overflow mud pit gain early gas kick detection riser |
