摘要
Abstract
Because Ordovician reservoir is deeper, the drilled wells are ultra deep wells in Tahe oilfield. From engineering point, introduced are logging obstructing causes in ultra-deep wells, such as, irregular borehole, sand bridge, higher viscosity drilling fluid, poor quality of mud cake, heavy oil in wellbore, poor well trajectory, etc. Analyzed are three causes of logging sticking which are pressure difference, sloughing and key seating. By improving borehole cleanup and logging technology, the risk of logging obstructing and sticking is obviously controlled. Proposed are two solutions: The key to reduce the risk is to control drilling quality, and ensure the down hole tools and wireline safety when changing tool string connection mode.关键词
测井工艺/超深井/遇阻/遇卡/井筒准备/塔河油田Key words
logging technology, ultra-deep well, obstructing, sticking, borehole cleanup, Tahe oilfield分类
天文与地球科学
