基于多目标优化的大位移井轨道设计方法  

Trajectory design method of extended-reach well based on multi-objective optimization

作　　者：贾江鸿 韩来聚 窦玉玲 闫振来 黄根炉[2] 马庆涛 

机构地区：[1]中石化胜利石油工程有限公司钻井工艺研究院,山东东营257017 [2]中国石油大学(华东)石油工程学院,山东青岛266580

出　　处：《广西大学学报（自然科学版）》2014年第4期847-853,共7页Journal of Guangxi University（Natural Science Edition）

基　　金：国家863计划项目(2012AA091501)

摘　　要：大位移井由于井深、位移大,摩阻扭矩问题是大位移井钻井过程中面临的一个主要问题,轨道的优劣直接关系到大位移井钻井过程中摩阻扭矩的大小,由此提出了基于多目标优化的大位移井轨道设计方法。在给定地质目标条件下,综合考虑轨道类型、造斜率、造斜点深度、稳斜角等条件进行批量轨道设计,在此基础上对不同工况下的摩阻、扭矩进行计算,建立包括摩阻、扭矩、轨道长度的综合目标函数,采用容限法对多目标函数进行求解,形成既有利于缩短钻井周期又有利于减小摩阻扭矩的大位移井轨道设计方法并进行现场应用。结果表明,该方法综合考虑钻井难度及钻井周期成本,具有明显的优越性,为大位移井轨道设计提供了新思路。Torque and drag are major problems in the drilling of extended-reach well due to the great depth and large displacement, which is directly affected by well trajectory quality. A trajectory de-sign method of extended-reach well based on multi-objective optimization is introduced. When geo-logical targets were given, masses of trajectory design were carried out considering the trajectory type, built-up rate, depth of kick off point and hold angle, and torque and drag were calculated un-der different working condition. The generalized objective function including drag, torque and trajec-tory length was established and solved using tolerance algorithm. The trajectory optimal design meth-od was formed and applied on-site, which not only shortened drilling period but also reduced torque and drag. The results show that the proposed method takes not only the drilling difficulty but also drilling period and costs into account, and it has obvious advantages and provides a new solution for trajectory design of extended-reach well.

关 键 词：大位移井 摩阻扭矩 轨道设计 地质目标 多目标优化 

分 类 号：TE22[石油与天然气工程—油气井工程]