油基钻井液在页岩油气水平井的研究与应用

Study and Application of Oil-based Drilling Fluids for Horizontal Well Drilling

针对页岩油气水平井的特点,室内着重研究了油基钻井液体系的携砂能力及封堵能力,构建了适合于页岩油气水平井的强封堵油基钻井液体系。通过现场4口页岩油气水平井的应用表明,油基钻井液具有良好的流变性能,没有岩屑床形成,且防塌能力强,滤失量低,井壁稳定,电测一次成功,下套管顺利到底。

Based on the characteristics of horizontal well drilling in shale oil and gas reservoirs,sand carrying capacity and sealing ability of oil-based drilling fluid were emphatically studied.And an oil-based drilling fluid system for horizontal wells in shale oil and gas reservoirs was established.The result of its field applications in four wells shows that the oil-based drilling fluid has good stability and rheological behavior without cuttings beds,it has good anti-sloughing ability and low filtration and successful electrical logging is successful at the first time.Casing is set smoothly.