文章摘要
碳酸盐储层酸化解堵配方优化及解堵机理
Optimization of Formula for Acidizing and Plugging Removal in Carbonate Reservoirand Plugging Mechanism Analysis
  
DOI:10.19346./j.cnki.1000-4092.2017.04.004
中文关键词: 解堵  酸化  碳酸盐岩  复配酸  响应面
英文关键词: plug removal  acidification  carbonate rock  compound acid  response surface
基金项目:
作者单位
孙淑娟, 张群正, 刘金磊, 郭王钊, 柯从玉 西安石油大学化学化工学院 陕西 西安 710065 
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中文摘要:
      为了解除碳酸盐岩超低渗透储层钻井泥浆污染, 通过响应面回归模拟分析解堵剂对泥饼和岩心溶蚀率差值来评价复配酸组分对泥饼和岩心的溶蚀效果, 确定了适宜的解堵剂配方, 考察了复配酸对岩心的解堵效果, 分析了解堵机理。结果表明, 在泥饼溶蚀中各组分的影响大小顺序为 H2O2>HCl>HF>HAc, 在碳酸盐岩岩心溶蚀中各组分的影响大小顺序为 HCl>HAc>HF>H2O2; 解堵剂配方为 9.2% HCl+1.3% HF+5% H2O2+15% HAc时, 解堵后的岩心渗透率恢复率达到 130%; 该复配酸具有缓速性能, 在解堵的同时能将岩心的伤害降到最低, 能 有效保护地层结构, 达到深部酸化的目的。图 8表 3参 12
英文摘要:
      In order to relieve the contamination of drilling mud in ultra-low permeability reservoir of carbonate rock,the corrosion effect of compound acid components on mud cake and core was evaluated by response surface regression analysis of the difference between dissolution rate of mud cake and core. The appropriate formula of plugging removal agent was determined. The plugging effect of compound acid on core was investigated and the plugging mechanism was analyzed. The results showed that four components were arranged according to their influence on dissolution efficiency of mud cake in following order: H2O2>HCl>HF>HAc,and that on dissolution efficiency of carbonate rock in following order: HCl>HAc>HF>H2O2. When the formula of plugging agent was 9.2% HCl+1.3% HF+5% H2O2+15% HAc,the recovery rate of core permeability after plugging removal was up to 130%.The compound acid had retarding property,and the damage of core could be reduced to minimum when the plug was removed. The stratum structure could be effectively protected so as to achieve the purpose of deep acidification.
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