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首页> 外文期刊>The Saudi Aramco journal of technology >The Successful Application of MPD Technology in Drilling Horizontal Wells in High-Pressure Formation Heterogeneity to Mitigate Drilling Hazards: Case Study
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The Successful Application of MPD Technology in Drilling Horizontal Wells in High-Pressure Formation Heterogeneity to Mitigate Drilling Hazards: Case Study

机译：MPD技术在高压地层非均质性水平井钻井中减轻钻井危险的成功应用：案例研究

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摘要

Highly pressurized intervals, coupled with high permeability, make the drilling of a 61/8" horizontal hole section particularly challenging in water injector wells, as mud losses are frequently encountered along with differential sticking events. The objective of workover operations in the field is to sidetrack the power water injector (PWI) from the existing well motherbore, converting the well to a dual lateral, which will maintain the reservoir pressure and enhance oil recovery from the oil-bearing formation. The variance in formation pressure distribution makes drilling with high mud density systems a challenge and increases the risk of encountering losses and differential sticking. To overcome the challenges mentioned, the application of managed pressure drilling (MPD) technology using the constant bottom-hole pressure (CBHP) method during the drilling of the 61/8" hole section enables use of a mud system that is statically below the formation pressure, while keeping the equivalent circulating density (ECD) slightly over the formation pressure and constant at static and dynamic conditions. This is achieved by applying surface back pressure (SBP) using an automated MPD control choke manifold. As the drilling is continued in the lateral, a dynamic formation pressure evaluation can be performed to assess the changing formation pressure and to adjust the drilling parameters. This article will summarize the results of using MPD, compare it to conventional drilling methods and highlight the lessons learned from the application of the MPD (CBHP variant) approach described to enhance drilling efficiency and to mitigate drilling hazards, such as losses and differential sticking. The analysis will further enhance the drilling practices of PWI wells.
机译：高压间隔以及高渗透率使得在注水井中钻出61/8“水平孔截面特别困难，因为泥浆流失经常伴随着微差的黏结事件而发生。该井的修井作业目标是从现有井的母孔旁侧注入动力注水器（PWI），将井转换为双侧井，这将保持储层压力并增强从含油地层中采油的能力。密度系统面临挑战并增加了遭受损失和粘滞差异的风险，为克服上述挑战，在61/8钻井过程中采用恒压底孔压力（CBHP）方法进行的有管理压力钻井（MPD）技术的应用”孔段使得能够使用静态低于地层压力的泥浆系统，同时保持等效压力t循环密度（ECD）略高于地层压力，在静态和动态条件下均保持恒定。这是通过使用自动MPD控制节流阀施加表面背压（SBP）来实现的。随着钻探在横向上的继续进行，可以执行动态地层压力评估以评估变化的地层压力并调整钻探参数。本文将总结使用MPD的结果，将其与常规钻探方法进行比较，并重点介绍从MPD（CBHP变体）方法的应用中汲取的经验教训，所述方法可提高钻井效率并减轻钻井危险，例如损失和差异粘结。该分析将进一步加强PWI井的钻井实践。

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