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川西蓬莱镇组及沙溪庙组为川西中深水平井主要开发储层,地层泥页岩发育,地层砂体发育不均质性,地层埋深浅。中深水平井存在水平井水平段长、位垂比大、靶点调整、控制点增加,井眼轨迹复杂,摩阻、扭矩大等难点。聚胺仿油基钻井液具有较强的封堵性,有效地抑制泥页岩水化分散及较佳的润滑性,较好地应用于川西中深水平井钻井。
The Penglaizhen Formation and the Shaximiao Formation in western Sichuan are mainly developed reservoirs in the horizontal deep well in Western Sichuan. The shale of the formation is developed. The sand body of the formation is inhomogeneous and the depth of the formation is shallow. Middle-depth horizontal wells have horizontal long horizontal section, bit-vertical ratio, target adjustment, control points increase, borehole trajectory complexity, friction, torque and other difficulties. Polyamine imitation oil-based drilling fluid has strong sealing, effectively inhibit the shale hydration and dispersion and better lubricity, better applied to the deep well in western Sichuan drilling.