石油学报 ›› 2007, Vol. 28 ›› Issue (3): 124-126,130.DOI: 10.7623/syxb200703026

• 石油工程 • 上一篇    下一篇

盐岩层钻大斜度井的井壁稳定性研究

曾德智1, 林元华1, 李留伟1, 施太和1, 李再军2, 白登相2   

  1. 1. 西南石油大学石油管力学和环境行为重点实验室, 四川成都, 610500;
    2. 中国石油塔里木油田公司, 新疆库尔勒, 201900
  • 收稿日期:2006-02-23 修回日期:2006-08-07 出版日期:2007-05-25 发布日期:2010-05-21
  • 作者简介:曾德智,男,1980年6月生,2005年获西南石油学院油气井工程专业硕士学位,现为西南石油大学油气井工程博士研究生,研究方向为钻井新技术与理论.E-mail:zengdezhi@tom.com
  • 基金资助:
    四川省杰出青年学科带头人培养基金(06ZQ026-028)和中国石油科技中青年创新基金(05E7044)联合资助.

Study on wellbore stability during high-angle well drilling in salt rock

Zeng Dezhi1, Lin Yuanhua Li Liuwei1, Shi Taihe1, Li Zaijun1, Bai Dengxiang2   

  1. 1. Key Laboratory for Mechanical and Environmental Behavior of Tubular Goods, Southwest Petroleum University, Chengdu 610500, China;
    2. PetroChina Tarim Oilfield Company, Kuerle 201900, China
  • Received:2006-02-23 Revised:2006-08-07 Online:2007-05-25 Published:2010-05-21

摘要: 针对盐岩井段易发生蠕变缩径,引起卡钻、固井后又易发生挤毁套管等事故的现象,应用有限元方法,建立了描述盐岩层中斜井井眼蠕变缩径的空间力学模型,从岩石力学角度分析了塔里木油田羊塔克地区盐岩层钻大斜度井的井壁稳定性,论述了一定地应力状态下井斜角和方位角对井眼缩径的影响规律.该研究成果为盐层段定向井井眼轨迹设计、合理确定泥浆密度和盐岩层钻井施工提供了理论参考,已成功应用于塔里木地区钻遇盐岩层时钻井工程的设计和施工.

关键词: 盐岩层, 大斜度井, 井壁稳定性, 有限元模型, 数值模拟

Abstract: During drilling of high-angle well in salt rock,the creep of salt rock often happens,which gives rise to the shrinkage of well-bore diameter and results in drill pipe sticking and casing failure.A three-dimensional mechanical model for describing creep and shrinkage of wellbore diameter was developed with the finite element analysis.The wellbore instability of high-angle well drilled in the salt rock of Yangtake district in Tarim Oilfield was studied.The correlations of creep rule with the drift angle and drift azimuth were discussed.The study result provided the theoretical reference for design of directional well path,determination of mud density and drilling high-angle wells in salt rock.The model was used to drilling engineering design and drilling operation in Tarim Oilfield.

Key words: salt rock, high angle well, wellbore stability, finite element model, numerical simulation

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