A Comprehensive Study of the Combined Effects of Drilling Fluid Rheological Properties and Near Wall Turbulence on the Particle Removal From Bed Deposits in Horizontal Wells

钻井液流变特性和近壁湍流对水平井床层沉积物颗粒去除的综合影响

• 批准号: RGPIN-2016-04647
• 负责人: Kuru, Ergun
• 金额: $ 2.04万
• 依托单位: University of Alberta
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=638297
• 关键词: Comprehensive; Study; Combined; Effects; Drilling

When drilling long horizontal wells, drilled solids tend to settle down on the low side of the wellbore and form a stationary bed. Presence of stationary cuttings bed causes operational difficulties such as pack-off, excessive torque and drag, slow drilling rate, and in severe cases, stuck pipe, lost circulation, and even loss of the well control. Occasionally, drilling must stop to clean the stationary bed, which is an expensive process and must be done in a timely manner. Despite significant progress made in drilling fluids, tools, and field practices, along with more than 50 years of university and industry research, field experience indicates that hole cleaning is still a major problem in most horizontal wells. The primary motivation of this study is the lack of a reliable model for optimizing hole cleaning process.

当钻长水平威尔斯井时，钻取的固体倾向于沉降在井筒的下侧并形成固定床。固定岩屑床的存在会导致操作困难，例如封隔、过大的扭矩和阻力、缓慢的钻井速度，并且在严重的情况下，会导致卡管、井漏，甚至失去井控。有时，钻井必须停止以清洁固定床，这是一个昂贵的过程，必须及时完成。尽管在钻井液、工具和现场实践方面取得了显著进展，沿着超过50年的大学和工业研究，现场经验表明，井眼清洁仍然是大多数水平威尔斯中的主要问题。这项研究的主要动机是缺乏一个可靠的模型来优化孔清洗过程。