石油学报 ›› 2005, Vol. 26 ›› Issue (5): 111-114.DOI: 10.7623/syxb200505025

• 石油工程 • 上一篇    下一篇

岩盐层蠕变规律的反演方法研究

林元华1, 曾德智1, 施太和1, 韩建增2, 何开平3   

  1. 1. 西南石油学院石油工程系, 四川, 成都, 610500;
    2. 宝山钢铁股份有限公司, 上海, 201900;
    3. 江汉石油管理局, 湖北, 潜江, 433121
  • 收稿日期:2004-10-11 修回日期:2005-03-07 出版日期:2005-09-25 发布日期:2010-05-21
  • 作者简介:林元华,男,1971年1月生,1999年获西南石油学院油气井工程专业博士学位,现为西南石油学院石油工程系副教授,重庆大学机械传动国家重点实验室兼职博士后研究人员,主要从事石油管线、石油钻井工艺方面的科研和教学工作.E-mail:yhlin28@163.com
  • 基金资助:
    国家自然科学基金(No.50074025);四川省青年基金和石油科技中青年创新基金联合资助

Inversion algorithm for creep laws of salt rocks

LIN Yuan-hua1, ZENG De-zhi1, SHI Tai-he1, HAN Jian-zeng2, HE Kai-ping3   

  1. 1. Department of Petroleum Engineering, Southwest Petroleum Institute, Chengdu 610500, China;
    2. Baoshan Steel Company Limited, shanghai 201900, China;
    3. Jianghan Petroleum Administration Bureau, Qianjiang 433121, China
  • Received:2004-10-11 Revised:2005-03-07 Online:2005-09-25 Published:2010-05-21

摘要: 在岩盐层钻井过程中,井眼易发生蠕变缩径从而引起卡钻;固井后,又易发生套管挤毁等事故。为此预测岩盐层的蠕变规律尤为重要。研究了井下岩盐本构关系的辨识方法,建立了岩盐本构模型辨识的目标函数,并提出了以井径测量信息为基础反演确定岩盐层蠕变特性参数的位移反分析法。利用该方法较好地预测了井下岩盐的蠕变规律,并由此可确定井径缩小规律和钻井液的密度。在江汉油田的应用结果表明,理论预测结果和实际结果能较好地吻合。

关键词: 岩盐层, 钻井, 蠕变规律, 反演方法, 力学参数, 本构模型

Abstract: During the drilling process in salt rocks, the creep of wellhole and the shrinkage of wellbore in diameter often happen,which results in sticking of tool and failure of casing.It is important to identify the constitutive laws of salt rocks.The objective functions for identifying the constitutive model of salt rock are established,and the algorithm to inverse the mechanical properties and creep coefficient of salt rocks based on the caliper logging data is put forward.The creep laws of salt rock were predicted by this algorithm.Based on the theory,the trends of wellbore shrinkage and mud density can be determined.The inversion algorithm was used in Jianghan Oilfield. The theoretical results are coincident with the field data.

Key words: salt rock, drilling, creeplaw, inversion algorithm, mechanical parameters, constitutive model

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