引用本文:[点击复制]
[点击复制]
【打印本页】 【在线阅读全文】【下载PDF全文】 查看/发表评论下载PDF阅读器关闭

←前一篇|后一篇→

过刊浏览    高级检索

本文已被:浏览 206次   下载 82 本文二维码信息
码上扫一扫!
砂岩油藏海水基酸液二次伤害的影响因素分析
李侠清,张贵才,葛际江,蒋平,裴海华,张旋,吴昊
0
(中国石油大学石油工程学院,山东青岛 266580)
摘要:
使用X射线衍射技术分析海水基酸液中的伤害类型,利用浊度法研究酸液类型、pH值、海水稀释倍数以及电解质对二次伤害的影响。结果表明:海水基酸液配制及反应中的二次伤害以MgF2、CaF2为主;相比土酸体系,多氢酸具有更好的抑制二次伤害的性能;增大酸液中HCl的用量、对海水进行稀释以及使用合适的电解质都可以抑制沉淀的生成。在酸效应、络合效应和一种特殊的反常同离子效应的基础上,研制出能够有效抑制酸液配制及反应中二次伤害的海水基酸液体系。
关键词:  海水  酸化  砂岩油藏  二次伤害  反常同离子效应
DOI:10.3969/j.issn.1673-5005.2017.03.020
投稿时间:2016-11-03
基金项目:国家自然科学基金项目(51474234,6);山东省自然科学基金重点项目(ZR2014EZ002, ZR2012EEM007);中国石油科技创新基金项目(2015D-5006-0205);中央高校基本科研业务费专项(14CX05019A)
Analysis on the influencing factors of secondary damage of seawater-based acid on sandstone reservoir
LI Xiaqing,ZHANG Guicai,GE Jijiang,JIANG Ping,PEI Haihua,ZHANG Xuan,WU Hao
(School of Petroleum Engineering in China University of Petroleum, Qingdao 266580, China)
Abstract:
The damage type of seawater-base acid was analyzed by X-ray diffraction technology. And the effects of acid types, pH value, dilution ratio of seawater and electrolytes on the secondary damage were studied by the turbidity method. It is found that the damage in seawater-based acid preparation and reaction is mainly formed by MgF2 and CaF2. Compared with mud acid system, multi-hydrogen acid is better in mitigating the secondary damage. Increasing the amount of HCl, diluting seawater and using appropriate electrolytes can also effectively inhibit the precipitations. Based on the analysis of the acid effects, the complexation effect, and a special kind of abnormal common-ion effect, one seawater-based acid system that can eliminate the secondary damage in sandstone matrix treatmentis developed.
Key words:  seawater  acidizing  sandstone reservoir  secondary damage  abnormal common-ion effect