中国石油大学学报（自然科学版）2017，Vol.41Issue(3)：161-168,8.DOI:10.3969/j.issn.1673-5005.2017.03.020
砂岩油藏海水基酸液二次伤害的影响因素分析
Analysis on the influencing factors of secondary damage of seawater-based acid on sandstone reservoir
摘要
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 meth od.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.关键词
海水/酸化/砂岩油藏/二次伤害/反常同离子效应Key words
seawater/acidizing/sandstone reservoir/secondary damage/abnormal common-ion effect分类
能源科技引用本文复制引用
李侠清,张贵才,葛际江,蒋平,裴海华,张旋,吴昊..砂岩油藏海水基酸液二次伤害的影响因素分析[J].中国石油大学学报（自然科学版）,2017,41(3):161-168,8.基金项目
国家自然科学基金项目(51474234,51574266) （51474234,51574266）
山东省自然科学基金重点项目(ZR2014EZ002,ZR2012EEM007) （ZR2014EZ002,ZR2012EEM007）
中国石油科技创新基金项目(2015D-5006-0205) （2015D-5006-0205）
中央高校基本科研业务费专项(14CX05019A) （14CX05019A）
