西安石油大学学报（自然科学版）2017，Vol.32Issue(4)：55-60,6.DOI:10.3969/j.issn.1673-064X.2017.04.009
丛式井侧钻绕障水平井优化设计方法
Optimum Design Method for Sidetracking Horizontal Well Bypassing Obstacle in Cluster Well
摘要
Abstract
There is the problem to bypass obstacle in the sidetracking horizontal well trajectory design of cluster well,which makes the trajectory design process become complicated.The obstacles are assumed to be drilled vertical well section and directional well section,and they are described as a part of cylinder and annulus separately.The axis equations of the obstacles are obtained using vector algebra.The trajectory types of the bypassing obstacle horizontal well are determined according to the geometrical relationships between the directional line of sidetracking point,the directional line of target point and the axis of obstacle.Taking the shortest bypassing obstacle trajectory length of the horizontal well as objective function,taking the nearest distance between the bypassing obstacle trajectory and the obstacle well section,the maximum deviation rate,the maximum azimuth change rate and the maximum borehole curvature as constraints,the optimum design model for sidetracking horizontal well bypassing obstacle in cluster well was established.The case calculation results of different trajectory types of bypassing obstacle horizontal wells show that the shortest borehole trajectory which meets the requirements to safe bypassing distance,deviation rate,azimuth change rate and borehole curvature can be obtained using the established optimum model.The optimum design method avoids complex trial calculation and check,and it is also applicable to the trajectory design of other types of bypassing obstacle wells.关键词
侧钻水平井/绕障/优化设计/最优化模型/井眼轨道/矢量代数Key words
sidetracking horizontal well/bypassing obstacle/optimum design/optimization model/well trajectory/vector algebra分类
能源科技引用本文复制引用
王志月,高德利,秦星..丛式井侧钻绕障水平井优化设计方法[J].西安石油大学学报（自然科学版）,2017,32(4):55-60,6.基金项目
国家自然科学基金创新研究群体项目“复杂油气井钻井与完井基础研究”(编号:51521063) （编号:51521063）
国家重点研发计划课题“钻井工艺及井筒工作液关键技术研究”(编号:2016YFC0303303) （编号:2016YFC0303303）
国家重大科技专项(编号:2017ZX05009-003) （编号:2017ZX05009-003）
