大修井管柱力学分析软件的研制与应用

Mechanical analysis software of workover pipe strings and its application

赵文彬 李子丰 王国斌 王海军

ZHAO Wenbin LI Zifeng WANG Guobin WANG Haijun

燕山大学，河北秦皇岛　066004 华北油田公司采油五厂，河北辛集　052360 华北油田公司采油工艺研究院， 河北任丘　062552

Yanshan University, Qinhuangdao 066004, China NO.5 Oil Production of Huabei Oilfield Company, Xinji 052360, China Oil Production Research Institute of Huabei Oilfield Company, Renqiu 062552, China

随着越来越多的油田进入开发中后期，各大油田及其子公司都在努力研制开发指导修井方面的软件。由于大修井的复杂性和多样性，目前国内没有对大修各种作业过程的分析，考虑到下入杆管柱及作业工具的安全性，力学分析是关键。为此，采用面向对象软件开发的思想完成大修井管柱力学分析软件，通过输入实钻轨道基本参数、管柱结构及作业参数，实现井筒轨道的三维显示；并利用拉力—扭矩模型输出作业过程管柱各点的拉力、扭矩、侧压力、安全系数和稳定性等力学参数；工具库部分可提供各种修井工具的性能、使用条件和规范。以上的输出结果计算准确，可信度高，对现场作业有较好的指导作用。

As more and more oilfields are entering into mid and late development stage, oilfield companies and their subsidiaries are sparing no efforts to develop workover software. Due to the complexity and diversity of workover wells, all workover process has not been analyzed in China so far. Considering the safety of running string and operating tool, mechanics analysis is critical. Therefore, this paper tends to complete mechanical analysis software of workover pipe strings by adopting the object-oriented idea. Through inputing basic well path parameters, string structure, and operational parameters, 3D description of well track could be fulfilled. Tension-torque physical models are used to output tension, torque, side pressure, safety factors and stability and other mechnics parameters of each point of pipe strings during operating process. The tool base could provide performance, usage conditions and norms for all kinds of workover tools. The calculating results mentioned above have high accuracy and credibility, so this software has a strong guide for field operation.