涪陵页岩气钻探在水平段目的层使用油基钻井液。钻探过程中出现井漏,漏失大量油基泥浆,造成巨大经济损失、钻井周期增加,导致勘探成本增加。目的层井漏特点是漏点多,漏失量大;同时存在裂缝和溶洞,堵漏时间长。针对目的层井漏,该区块探索了随钻堵漏、静止堵漏、桥塞堵漏、水泥堵漏、管外封隔器+水泥机械式堵漏等多种堵漏方法,保证了钻探施工的顺利进行。 Fuling shale gas drilling uses oil-based drilling fluids at the target level of the horizontal section. Lost circulation during drilling, the loss of a large amount of oil-based mud, causing huge economic losses, drilling cycles increase, resulting in increased exploration costs. The purpose of the loss of the characteristics of the hole is more leakage, loss of large; the same time there are cracks and caves, plugging a long time. For the purpose of the purpose of well leakage, the block explores drilling plugging, static plugging, plug plugging, cement plugging, pipe packer + cement mechanical plugging and other plugging methods to ensure drilling The construction proceeded smoothly.