Practice of Sidetracking Drilling in Dashen CP302 Horizontal Well and the Cognition
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摘要: 达深CP302井是大庆油田自主设计和施工的第一口深层小井眼欠平衡套管开窗侧钻水平井,该井集中了深井、小井眼井、欠平衡井、套管开窗及水平井的所有技术特点与难点。通过技术方案优化,确定了斜向器配合复式铣锥磨铣开窗方式,详细介绍了套管开窗侧钻技术和井眼轨迹控制技术。达深CP302井的钻探成功,取得了良好的经济效益和社会效益。Abstract: Dashen CP302 is the first deep slim hole under-balanced casing window sidetracking horizontal well which is in-dependently designed and constructed in Daqing oilfield, and has concentrated all the technical characteristics and the diffi-culties of deep well, slim hole well, under-balanced well, casing window and horizontal well.By optimization on the tech-nical scheme, whipstock with duplex milling and cone milling window is determined.The paper introduces casing sidetrack-ing technology and well trajectory control technology in detail.
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Key words:
- under-balanced well /
- casing sidetracking /
- trajectory control /
- scheme optimization /
- slim hole /
- Dashen CP302 well
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