三维水平井随钻修正设计的优化方法及应用  

Optimization method of modifying 3-D horizontal wells trajectory while drilling and its application

作　　者：钱伟懿[1] 冯恩民[1] 韦艳华[1] 

机构地区：[1]大连理工大学应用数学系

出　　处：《大连理工大学学报》2004年第4期610-615,共6页Journal of Dalian University of Technology

基　　金：国家自然科学基金资助项目(19871009).

摘　　要：在水平井实际应用中,实钻轨道常偏离原设计最优轨道.把实钻轨道与已设计最优轨道的状态变量差值作为参数,建立带有参数的三维水平井最优控制模型,把该模型转化为非线性规划问题求解,讨论了该非线性规划问题的最优解性质.依此性质给出一个全局最优的算法,并将其应用到实际水平井轨道设计中,数值结果表明模型及算法有效、正确.The practical trajectory often deviates the designed optimal trajectory in the practical application of horizontal wells. For this reason the authors regard the state variable dispersion between practical trajectory and the designed optimal trajectory as parameter, and propose an optimal control model for designing 3-dimensional horizontal wells with parameter. The proposed model is transcribed into nonlinear programming problem. The properties of optimal solution of this nonlinear programming are discussed. A global optimization algorithm, based on these properties, is proposed. This algorithm is applied to practical design, and the numerical results illustrate the accuracy and the efficiency of the proposed model and its algorithm.

关 键 词：三维水平井 随钻修正设计 最优控制 非线性规划 全局优化算法 实钻轨道 

分 类 号：TE243[石油与天然气工程—油气井工程]