泾河油田三维水平井井眼轨迹优化设计及应用

在规模化开发过程中,泾河油田面临井场确定困难、剩余油挖潜难度大等难题。基于泾河油田储层地质特点,应用理论计算、数值模拟等方法优化水平井三维井眼轨迹参数;轨迹剖面采用六段制、造斜率(4°~6°)/30 m、靶前距和偏移距相互匹配且不大于600 m。JH17P25井三维轨迹设计及实施结果表明,三维水平井有利于解决泾河油田开发中遇到的难题,满足摩阻和扭矩限制要求,完井管柱可安全下入,实钻轨迹及钻井指标符合设计要求。

Optimization and application of borehole tiajectoiy in 3D horizontal wells in Jinghe oilfield

In process of large-scale development,there existed big difficulties in wellsite determination and remaining oil potential tapping of Jinghe oilfield.Based on reservoir geological characteristics of Jinghe oilfield,theoretical calculation and numerical simulation method were used to optimized borehole trajectory parameters in 3D horizontal wells.Six sections were adopted in trajectory profile,with build-up rate of 4~6°/30 m,and the frontal distance from target point and offset distance being less than 600 meters and matching with each other.The design analysis and field application of JH17P25 indicated the 3D horizontal wells were beneficial to solving many problems encountered in development and met limitation requirements of friction torque,and then the completion string can be safely run into,with good practical drilling trajectory and drilling index effect.