新型智能旋转导向工具在南海东部探井的应用分析

黄懿强

摘 要：【目的】为满足南海东部勘探钻井数量和完钻深度逐年增加情况下，垂直钻井和定向钻井对井眼轨迹控制高的要求，确保钻井井眼轨迹质量，解决前期定向井工具定向能力不足的问题，积极推动“一趟钻”工程。【方法】通过对非动力及动力定向井工具的技术原理和作业优缺点进行比较和分析，结合作业需求和工具特点，优选了智能推靠式旋转导向工具iCruise，该工具系统定向能力强、耐高温，坚固的机械设计和高强度材料使其可在恶劣环境中使用。【结果】优选的旋转导向工具iCruise在南海东部十余口探井进行了成功应用，不仅满足复杂结构井的精准定向要求，而且大幅度提高了效率。【结论】本研究为定向钻井作业积累了经验，也为旋转导向工具的国产化提供了建议。

关键词：定向钻井；旋转导向；井斜角；推靠式

中图分类号：TE243      文献标志码：A    文章编号：1003-5168（2023）09-0065-04

Abstract：[Purposes] In order to meet the increasing number of exploration drilling and completion drilling depth in the eastern of South China Sea year by year， vertical drilling and directional drilling have high requirements on the control of well trajectory， ensure the quality of well trajectory， solve the problem of insufficient directional ability of directional drilling tools in the early stage， and actively promote the "one trip drilling" project. [Methods] Combining operation requirements and tool characteristics，through the comparison and analysis of the technical principles and advantages and disadvantages of non-dynamic and dynamic directional drilling tools， the intelligent push-back rotary steerable tool iCruise was selected. The tool system has strong directional capability， high temperature resistance， strong mechanical design and high strength materials for using in harsh environments. [Findings] The preferred rotary steerable tool iCruise has been successfully applied to more than 10 exploration Wells in the eastern of South China Sea， which not only meets the orientation requirements of complex structural Wells， but also greatly improves the operational efficiency. [Conclusions] This study has accumulated valuable experience for directional drilling operations and provided suggestions for the localization of rotary steering tools.

Keywords：directional drilling; rotary steerable;  inclination angle; push the bit

0 引言

南海東部积极践行油气勘探开发“七年行动计划”，勘探钻井井数和完钻井深度逐年增加。2022年完钻43口探井，创历史最高水平，平均钻井深度3 735.4 m，刷新历年探井平均井深纪录，其中A井完钻井深达5 470 m，为井深最大的井。随着直探井和定向探井数量及钻井深度的增加，对定向井工具的性能提出了新的要求［1］，在作业者不断追求提速提效的情况下，不仅要求工具定向作业能力优异，而且需要具备出色的作业稳定性和智能辅助决策能力。

1 常见定向井工具

定向井工具用于井眼轨迹控制，主要包括非动力防斜打直钻具组合、螺杆马达和旋转导向工具等，海上作业中常用的定向井工具为钟摆钻具、螺杆马达和旋转导向工具。……