莱州纱岭矿区深孔复杂地层钻进冲洗液技术

Drilling Fluid Technology of Deep Hole in Complex Formation of Shaling Mining Area

摘要:

山东省莱州市纱岭矿区地层复杂破碎，岩石硬度高，岩石的可钻性级别在7～9级，属于较典型的“硬、脆、酥、漏、碎”复杂地层，钻进极其困难。通过对冲洗液进行一系列的探索和测试，改良了配方，提高了钻进效率，减少了孔内事故，实现了安全生产，提高了经济效益。在该矿区已施工钻孔117个，总工作量180795.10 m，平均孔深达1545.26 m，最深孔深达2117.70 m。

Abstract:

Drilling operation is very difficult in Shaling mining area in Laizhou of Shandong Province, where the drillability grade is 7～9, this typically complex formation is hard, brittle, loose, leakage and broken. Through a series of exploration and tests of the drilling fluid, flushing fluid formula was optimized to improve the drilling efficiency and reduce downhole accidents with safe production and high economic benefits. 117 holes have been completed in this mining area, the total drilling footage is up to 180795.10m with average depth of 1545.26m, and the deepest hole is 2117.70m.