基于预防井涌的水平井最大长度设计方法

发布时间：2018-05-10 21:55

本文选题：最大长度 + 环空压耗　；参考：《石油科学通报》2016年02期

【摘要】：从预防井涌的角度对水平井最大长度的限制因素进行了分析,根据钻井液流体力学基本原理及水平井水平段环空压耗计算模型,得出水平井水平段最大长度的设计方法;针对排量、地层安全密度窗口和钻井液流变性等因素对水平井水平段长度的影响进行敏感性分析。结果表明,水平井水平段最大长度受排量、地层安全密度窗口和钻井液流变性等多个因素共同影响。泵排量增加、钻井液粘度增大,水平段最大允许长度减小;地层安全密度窗口增加,水平段最大允许长度增大。
[Abstract]:The limiting factors of the maximum length of horizontal well are analyzed from the angle of preventing wellbore. According to the basic principle of fluid hydrodynamics and the calculation model of annular pressure loss in horizontal section of horizontal well, the design method of maximum length of horizontal section of horizontal well is obtained. According to the influence of displacement, formation safe density window and drilling fluid rheology on the horizontal section length of horizontal well, the sensitivity analysis is carried out. The results show that the maximum length of horizontal section is affected by displacement, formation safety density window and drilling fluid rheology. With the increase of pump displacement, the viscosity of drilling fluid increases, the maximum allowable length of horizontal section decreases, and the window of formation safety density increases, and the maximum allowable length of horizontal section increases.
【作者单位】：中国海洋石油国际有限公司;中国石油大学(华东);
【基金】：973项目(2015CB251200) 国家重大专项(2016ZX05020006-007) 国家自然基金(51374232)联合资助
【分类号】：TE22

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