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高密度钻井液高温静态沉降稳定性室内研究

董晓强,  李雄,  方俊伟,  张国

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文章导航 > 钻井液与完井液  > 2020 >  37(5): 626-630
董晓强, 李雄, 方俊伟, 张国. 高密度钻井液高温静态沉降稳定性室内研究[J]. 钻井液与完井液, 2020, 37(5): 626-630. doi: 10.3969/j.issn.1001-5620.2020.05.015
引用本文: 董晓强, 李雄, 方俊伟, 张国. 高密度钻井液高温静态沉降稳定性室内研究[J]. 钻井液与完井液, 2020, 37(5): 626-630. doi: 10.3969/j.issn.1001-5620.2020.05.015
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DONG Xiaoqiang, LI Xiong, FANG Junwei, ZHANG Guo. Laboratory Study on Static Sedimentation Stability of High-Density Drilling Fluids at High Temperatures[J]. DRILLING FLUID & COMPLETION FLUID, 2020, 37(5): 626-630. doi: 10.3969/j.issn.1001-5620.2020.05.015
Citation: DONG Xiaoqiang, LI Xiong, FANG Junwei, ZHANG Guo. Laboratory Study on Static Sedimentation Stability of High-Density Drilling Fluids at High Temperatures[J]. DRILLING FLUID & COMPLETION FLUID, 2020, 37(5): 626-630. doi: 10.3969/j.issn.1001-5620.2020.05.015
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高密度钻井液高温静态沉降稳定性室内研究

doi: 10.3969/j.issn.1001-5620.2020.05.015

  • 1. 页岩油气富集机理与有效开发国家重点实验室, 北京 100101;

  • 2. 中国石化石油工程技术研究院, 北京 100101;

  • 3. 中国石化西北油田分公司石油工程技术研究院, 乌鲁木齐 841000

基金项目: 

国家重点研发计划子课题“火成岩地区深层地热高效成井关键技术”（2019YFC0604904）、中石化科技部“顺北一区断溶体油藏储层保护技术研究”（P18021-4）、国家重大专项“彭水地区常压页岩气勘探开发示范工程”（2016ZX05061）、国家自然科学基金重大项目“页岩油气高效开发基础理论研究”（51490650）联合资助

详细信息
    作者简介:

    董晓强,副研究员,博士,1980年生,毕业于山东大学物理化学专业,现在从事钻井液技术研究工作。电话(010)84988195;E-mail:dongxq.sripe@sinopec.com

  • 中图分类号: TE254.1

Laboratory Study on Static Sedimentation Stability of High-Density Drilling Fluids at High Temperatures

  • 1. State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Beijing 100101;

  • 2. SINOPEC Research Institute of Petroleum Engineering, Beijing 100101;

  • 3. SINOPEC North-west Oilfield Corporation, Urumqi, Xinjiang 841000

    摘要
  • 摘要: 高温高密度钻井液的沉降稳定性对钻井液性能稳定和井控安全都至关重要。采用低剪切应力及低振荡频率对钻井液胶液进行小幅度原位振荡的方法，考察了在不破坏胶体缔合结构的状态下高密度钻井液组分在胶液中的黏弹性响应，分析了静置条件下胶液中处理剂间的作用及重晶石在钻井液胶液中所处的应力环境。实验结果表明，钻井液中的共聚物、磺化材料、膨润土等通过疏水缔合、桥接作用形成具有柔性网架的弱胶凝结构，高密度钻井液胶液主要表现为黏性特征。表明高温下高密度钻井液胶液中黏土-磺化材料-共聚物中组分相互作用，减小了重晶石沉降速度，提高了重晶石的沉降稳定性能。

     

    Abstract: The sedimentation stability of a high temperature high density drilling fluid plays a key role in stabilizing the property of the drilling fluid and in the safety of well control. Using small amplitude in-situ oscillation method, in which low shearing stress and low frequency oscillation were applied to a high density drilling fluid, the viscoelastic response of the drilling fluid constituents in gel solution was observed under the condition that the associative structure of the drilling fluid was not broken down, and analyses were performed on the interaction among the additives in the drilling fluid at rest and the effect of the stress environment on the barite in the drilling fluid. Experimental results showed that drilling fluid additives, such as copolymers, sulfonates and bentonite, can develop a weak gel structure with flexible network among them through hydrophobic association and bridging. The gel solution of the highdensity drilling fluid generally exhibits viscous characteristics. indicating that interaction among clay, sulfonate and copolymer in a high-density drilling fluid at elevated temperatures effectively hinders the sedimentation of barite, thereby improving the sedimentation stability of barite.

     

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  • 收稿日期:  2020-06-15
  • 刊出日期:  2020-10-28

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