水平井入窗井段井斜角计算方法研究

Research on the Calculation Method of Wellbore Inclination Angle in the Window Section of Horizontal Wells

摘要: 水平井入窗是石油钻井施工过程中的重点，由于地下地质体存在预测误差，储层埋深、厚度、地层倾角均存在一定的不确定性，并且着陆位置、造斜率、揭开储层顶的井斜角等对入窗效果有明显影响，因此，如何开展井斜角的优化是当前面临的难题之一。研究表明，明确入窗阶段着陆位置、造斜率等关键参数的确定原则，建立揭开储层顶所需要的井斜角迭代计算方法，形成入窗阶段井斜角计算流程与方法，能有效降低施工风险，为水平井入窗的施工提供技术支持。

Abstract: Window entry is a key point in the construction process of horizontal wells. Due to the prediction errors of underground geological bodies, there are certain uncertainties in reservoir burial depth, thickness, and dip angle. In addition, the landing position, build-up rate, and wellbore inclination angle that reveal the top of the reservoir have a significant impact on the window entry effect. Therefore, how to optimize the wellbore inclination angle is one of the current challenges. Research has shown that clarifying the principles for determining key parameters such as landing position and build-up rate during the window entry stage, establishing an iterative calculation method for well inclination angle required to uncover the reservoir top, and forming a calculation process and method for well inclination angle during the window entry stage can effectively reduce construction risks and provide technical support for horizontal well window entry construction.