南海西江大位移井摩阻和扭矩数值分析研究

RESEARCH ON NUMERICAL ANALYSIS OF DRAG AND TORQUE FOR XIJIANG EXTENDED REACH WELLS IN SOUTH-CHINA SEA

高德利 覃成锦 李文勇

Gao Deli Tan Chengjin LiWenyong

石油大学, 北京 102249 菲利普斯中国有限公司, 广州深圳 518067

井下摩阻和扭矩,是影响大位移井设计与施工的2个关键因素。对三维井眼中管柱单元进行受力分析,建立了通用的井下摩阻和扭矩计算模型和算法,并开发出大位移井摩阻和扭矩的数值计算软件。该软件在南海西江大位移井钻井和下套管作业案例分析中得到成功应用,对井下摩阻和扭矩进行了数值模拟计算及预测分析,获得较好的结果,并可在今后的大位移井工程中推广应用。

Downhole drag and torque are two key factors which affect design and operation of extended reach well.In this paper,the loaded state of tubular element in three dimension wellbore was analyzed,the general numerical model and arithmetic for downhole drag and torque calculation were set up,and numerical calculation software was developed.This software had been applied successfully to case analysis of drilling and casing running operations forXijiang extended reach wells in South-China Sea.The numerical simulation and predictive analysis on downhole drag and torque were made with this software,and satisfied results were obtained.Consequently,it can be generally applied to future extended reach well engineering.

10.3969/j.issn.1000-7393.2003.05.002