苏里格气田优化三开水平井三开“一趟钻”可行性研究

Study on the Feasibility of Optimizing the “One-Trip Drilling” of Triple-Opening Horizontal Wells of Sulige Gas Field

摘要: 近年来，随着长庆油田苏里格气田井身结构的调整，优化三开结构水平井已成为天然气各区块重要井型，并为控降故障复杂、钻井提速提效作出积极贡献。水平井“一趟钻”技术是某一开次井段使用一只钻头单趟钻完成的进尺和井眼轨迹控制技术，这是一项系统工程，不仅是钻井工程和钻井工具的全面升级，也是水平井整体技术水平的集中体现，是水平井钻井提速提效的有效途径。本文针对优化三开水平井三开“斜 + 水”井段，对致密气区域施工的18口井及历年数据分析，通过钻井工具优选、剖面轨迹优化、地质优势助力等各种措施，论证了三开“一趟钻”技术的可行性，通过完井资料分析“一趟钻”制约因素，研究“一趟钻”实施条件，为优化三开水平井三开“一趟钻”的实施提供理论依据。

Abstract: In recent years, with the adjustment of the well structure, the optimization of three open structure horizontal wells has become an important well type in various natural gas blocks, and has made positive contributions to the control and reduction of fault complexity and speed up and efficiency of drilling. Horizontal well “one-trip drilling” technology is a single trip drilling technology using a single drill bit to complete a certain open section of the well in terms of footage and borehole trajectory control, which is a systematic project that is not only a comprehensive upgrade of drilling engineering and drilling tools, but also a concentrated expression of the overall technical level of horizontal wells, and an effective way to speed up and improve the efficiency of horizontal well drilling. In this paper, we analyze the 18 wells constructed in the tight gas area and the data of the past years to optimize the “slant + water” section of the horizontal wells, and demonstrate the feasibility of the “one-trip drilling” technology through various measures such as the selection of drilling tools, optimization of the profile trajectory and geological advantages. The feasibility of the “one-trip drilling” technique was demonstrated, the constraints of “one-trip drilling” were analyzed through completion data, and the conditions of “one-trip drilling” were studied to provide a theoretical basis for optimizing the implementation of “one-trip drilling” in the three-drive horizontal wells theoretical basis.