摘要
为了确定多梯度动态钻井过程中的关键控制参数,优化钻井效率,建立多梯度钻井动态参数优化模型。以每次调整控制参数后的最大钻进深度和同一井身结构条件下的最大钻进深度为优化目标,以旋流分离器位置和钻井液密度为优化参数,以钻井液循环当量密度与安全密度窗口之间的约束关系以及钻头预期寿命为约束条件,并利用粒子群优化算法对该优化模型进行求解。结果表明:每次调整控制参数后都存在同一组最优的旋流分离器位置和钻井液密度值使单趟钻进深度最大;随着调整次数的增加,旋流分离器距钻头的最优距离和钻井液的最优密度均逐渐增大,但单趟最大钻进深度逐渐减小;旋流分离器和钻头预期寿命的设计应协调,避免起下钻浪费。
In order to determine the important control parameters in multi-gradient drilling and optimize drilling efficiency,a dynamic parameter optimization model was established.In the improved model,the maximum drilling depth after the adjustment of the control parameters for a single drill bit trip and the maximum drilling depth under the same well structure were set as the optimized subjects.The position of cyclone and drilling fluid density were set as the optimizing parameters,and the constraint relationship between the drilling fluid cyclic equivalent density and safe density window as well as the drill bit life expectancy were the constraints.The optimization model was solved by a particle swarm optimization algorithm.The results of case study show that there are optimal position of the cyclone separator and density of the drilling fluid after each adjustment to make the drilling depth of each single trip longest.With the increase of the number of the adjustments,the optimal position of the cyclone separator from the drill bit and the optimal density of the drilling fluid are gradually increased,but the maximum drilling depth of the single trip is gradually reduced.The design of cyclone separator and bit life expectancy should be coordinated to avoid waste of rising and drilling.
作者
杨宏伟
李军
柳贡慧
高旭
王江帅
骆奎栋
YANG Hongwei;LI Jun;LIU Gonghui;GAO Xu;WANG Jiangshuai;LUO Kuidong(College of Petroleum Engineering in China University of Petroleum(Beijing),Beijing 102249,China;Beijing University of Technology,Beijing 100124,China;The 2nd Gas Production Plant of Changqing Oilfield Company,Yulin 719000,China)
出处
《中国石油大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2019年第3期73-79,共7页
Journal of China University of Petroleum(Edition of Natural Science)
基金
国家自然科学基金重点项目(51734010,51334003)
国家科技重大专项(2016ZX05020-003)
关键词
钻井
动态参数优化
粒子群优化算法
旋流分离器
窄安全密度窗口
drilling
dynamic parameter optimization
particle swarm optimization algorithm
cyclone separator
narrow safe density window
