渤中丛式井轨道设计全角变化率敏感性分析

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英文篇名：Sensitivity Analysis of Dogleg for Trajectory Design in Bozhong Cluster Well 作者：焦明 ; 陈毅 ; 庹海洋 ; 谢涛 ; 李金蔓 英文作者：JIAO Ming;CHEN Yi;TUO Haiyang;XIE Tao;LI Jin-man;Oilfield Technology Division of COSL;Tianjin Branch of CNOOC Ltd.; 关键词：丛式井 ; 轨道设计 ; 全角变化率 ; 渤中油田 英文关键词：cluster wells;;trajectory design;;dogleg;;Bozhong oilfield 中文刊名：LNGX 英文刊名：Journal of Liaoning University of Technology(Natural Science Edition) 机构：中海油田服务股份有限公司油田技术事业部;中海石油(中国)有限公司天津分公司; 出版日期：2019-05-09 10:49 出版单位：辽宁工业大学学报(自然科学版) 年：2019 期：v.39;No.187 基金：渤海油田3000万t持续稳产关键技术研究(CNOOC-KJI35,ZDXM36TJ) 语种：中文; 页：LNGX201903008 页数：4 CN：03 ISSN：21-1567/T 分类号：40-42+46

摘要

海上油田开发受空间限制,多采用丛式井组,丛式井轨道设计时,较大的全角变化率有利于缩小总进尺和进行防碰设计,但全角变化率的增加,对钻杆寿命、套管磨损等都有不利影响,如何确定合理的全角变化率成为影响钻井安全和经济效益的重点之一。首先分析了随着全角变化率的变化,井深变化的规律,再建立模型,分析全角变化率增加对钻杆疲劳、套管磨损、马达滑动造斜段长度等的影响,确定了海上丛式井合理的全角变化率范围,从而得到在合理范围内增加全角变化率有利于节约钻井成本,且安全可行的结论,为海上油田丛式井轨道设计全角变化率选择提供参考依据。
        Offshore oilfield development is restricted by space, and cluster wells are used widely. In the design of cluster well trajectory, a large dogleg contributes to the reduction of total footage and anti-collision design. However, dogleg increase has adverse effects on drill pipes' life and casing wear. The determination of reasonable dogleg plays a key role in affecting drilling safety and economic benefits. First, the law of well depth variation with the dogleg change is analyzed, then a model is established to analyze the influence of dogleg increase on drill pipe fatigue, casing wear, build-up section length, and a reasonable dogleg range for offshore cluster wells is determined. Thus, it is concluded that increasing dogleg within a reasonable range is beneficial to saving drilling cost, it is also safe and feasible, which provides a reference for the dogleg selection for cluster well trajectory design in offshore oilfield.

引文

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