大斜度井投捞系统动力学模型及力学特性

doi:10.7623/syxb202105011

石油学报 ›› 2021, Vol. 42 ›› Issue (5): 677-685.DOI: 10.7623/syxb202105011

大斜度井投捞系统动力学模型及力学特性

宋显民¹, 杨辉¹, 柳军², 黄祥², 付军¹, 郭晓强², 李国永¹, 段健¹

1. 中国石油冀东油田公司钻采工艺研究院河北唐山 063004;
2. 西南石油大学机电工程学院四川成都 610500

收稿日期:2020-04-06 修回日期:2020-12-29 出版日期:2021-05-25 发布日期:2021-06-05
通讯作者: 宋显民,男,1971年9月生,1995年获西安石油大学学士学位,2018年获西南石油大学石油矿场机械专业博士学位,现为中国石油冀东油田公司钻采工艺研究院高级工程师,主要从事采油工艺研究工作。
作者简介:宋显民,男,1971年9月生,1995年获西安石油大学学士学位,2018年获西南石油大学石油矿场机械专业博士学位,现为中国石油冀东油田公司钻采工艺研究院高级工程师,主要从事采油工艺研究工作。Email:1925184311@qq.com
基金资助:
中国石油冀东油田公司重大项目"注水专项治理工程研究"（KF2018A02）资助。

A dynamic model and mechanical properties of the fishing system for high-inclination wells

Song Xianmin¹, Yang Hui¹, Liu Jun², Huang Xiang², Fu Jun¹, Guo Xiaoqiang², Li Guoyong¹, Duan Jian¹

1. Research Institute of Drilling and Production Technology, PetroChina Jidong Oilfield Company, Hebei Tangshan 063004, China;
2. School of Mechanical Engineering, Southwest Petroleum University, Sichuan Chengdu 610500, China

Received:2020-04-06 Revised:2020-12-29 Online:2021-05-25 Published:2021-06-05

摘要/Abstract

摘要： 大斜度井井斜角大、井身结构复杂，其投捞操作的可靠性受一系列理论难题的影响，目前缺乏大斜度井投捞系统动力学理论研究成果，无法进行投捞系统力学特性分析和基于基础理论的投捞工艺改进研究。通过提出钢丝-油管接触分析、油管压差阻力计算等系列方法，以此建立了综合考虑井口辅助装置、钢丝、投捞器相互作用的大斜度井钢丝投捞系统动力学模型，基于有限差分法、高斯消去法结合迭代法实现了模型的求解，利用现场实测结果验证了模型的有效性。根据投捞系统的动力学模型，开展了大斜度井投捞系统力学特性研究，揭示了投捞工具串下入、投送、上提、打捞等过程载荷变化规律，以及下冲过程中井斜、井深、井眼轨迹、冲程、投捞器几何参数等因素对下冲速度的影响机理。

关键词: 大斜度井, 钢丝投捞系统, 动力学研究, 力学特性分析, 投捞工具串

Abstract: High-inclination well shave large hole deviation angle and complex structure. The fishing system of high-inclination wells faces some theoretical problems that affect the reliability of fishing operations, and need to be overcome. Currently, less research results in terms of the dynamics theory have been obtained for the fishing system of high-inclination wells. As a result, it is impossible to analyze the mechanical characteristics of the fishing system and study the improvement of fishing technology based on basic theories. This paper proposes a series of methods such as steel wire-tubing contact analysis and pressure drag calculation of tubing, aiming to establish a dynamic model for the steel-wire fishing system of high-inclination wells that comprehensively considers the interaction between wellhead auxiliary device, steel wire, and fishing device. Based on the finite difference method, and the Gaussian elimination method in combination with the iteration method, the model was solved; the validity of the model was verified using the on-site measurement results. According to the dynamics model, a study is performed on mechanical characteristics of the fishing system of high of the fishing system; it finds the load fluctuation law of fishing tool string in the processes of tripping in, delivery, lifting, and fishing, and reveals the influence mechanisms of hole deviation, hole depth, wellbore trajectory, stroke, and the geometric parameters of fishing device on undershooting speed.

Key words: high-inclination wells, steel wire fishing system, dynamic research, mechanical characteristics analysis, fishing tool string

中图分类号:

TE283

宋显民, 杨辉, 柳军, 黄祥, 付军, 郭晓强, 李国永, 段健. 大斜度井投捞系统动力学模型及力学特性[J]. 石油学报, 2021, 42(5): 677-685.

Song Xianmin, Yang Hui, Liu Jun, Huang Xiang, Fu Jun, Guo Xiaoqiang, Li Guoyong, Duan Jian. A dynamic model and mechanical properties of the fishing system for high-inclination wells[J]. Acta Petrolei Sinica, 2021, 42(5): 677-685.

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大斜度井投捞系统动力学模型及力学特性

A dynamic model and mechanical properties of the fishing system for high-inclination wells

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