气田开发

蒙脱石与酸化体系反应实验研究

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  • (1.长庆油田公司勘探部,陕西 西安 710021;2.西南石油大学,四川 成都 610500;3.长庆油田公司气田开发处,陕西 西安 710021)
阎荣辉(1975-),男,湖北罗田人,工程师,主要从事油气勘探科研及管理工作.

收稿日期: 2007-04-11

  修回日期: 2007-06-05

  网络出版日期: 2007-08-10

基金资助

“油气藏地质及开发工程”国家重点实验室基金项目(编号:PLN0114)资助.

EXPERIMENTAL STUDY ON MONTMORILLONITE REACTION IN ACIDIZATION SYSTEM

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  • (1.Exploration Department of Changqing Oil Field Company, Xi'an 710021, China; 2.Southwest Petroleum University,Chengdu 610500, China
    ; 3.Gas Field Exploitation Department of Changqing Oil Field Company, Xi'an 710021, China)

Received date: 2007-04-11

  Revised date: 2007-06-05

  Online published: 2007-08-10

摘要

选择纯度大于98%的单一蒙脱石,在60℃条件下,与HF、土酸、氟硼酸等酸化体系进行反应,并用X\|衍射仪、能谱电镜分析仪、分光光度计等进行测量与分析,探讨了蒙脱石与酸化体系反应后残酸液体中主要离子(硅、铝)浓度的变化规律、蒙脱石微观结构的变化、矿物的转化及其影响因素等,结果表明:酸对蒙脱石晶体中铝元素具有优先溶蚀的能力;蒙脱石与HF、土酸体系反应速度很快,1h内硅、铝离子浓度达到最大,均显示强酸、快速溶蚀的特点,2 h内8% HBF4体系表现出弱酸性,主要离子(硅、铝)浓度为HF体系中的1/2~1/3,2 h后8% HBF4和5% HCl+7% HBF4体系对蒙脱石的溶蚀强度基本相同;反应中有复杂的垢成分产生,可能对储层造成损害。

关键词: 酸化; 蒙脱石; 溶蚀; ; 损害

本文引用格式

阎荣辉, 唐洪明, 李皋, 卢蜀秀 . 蒙脱石与酸化体系反应实验研究[J]. 天然气地球科学, 2007 , 18(4) : 626 -628 . DOI: 10.11764/j.issn.1672-1926.2007.04.626

Abstract

Under 60℃ circumstance, with X'Pert PRO X Ray, Spectrometry Electron Microscope, Scanning Spectrometer and so on, the concentration changing law of main ions is systematically investigated in the residual acids after montmorillonite mineral, whose content is over 98%, reacts with HF, HF/HCl, HCl/HBF4. Solid phase transformation, characteristics of particle fabric, and factors of affecting the transformation etc have also been researched. The experiment results indicate: acids have capability to dissolve Al element of montmorillonite crystal initially. HF/mud acid reacts with montmorillonite at a very fast rate, showing fast and intensive dissolution characteristics. In the reaction less than 2 hours, 8% HBF4 system turns into weak acid and the main ions content is only 1/2 to 1/3 of that in HF or mud acid; after 2 hours, HBF4 system has identical dissolving endurance of montmorillonite; with Spectrometry Electron Microscope, complicated scale has been found, which is likely to damage reservoir bed.

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