In order to achieve the goal of high efficiency,fast and uniform acidification,deep plugging removal and prolong the period of acidizing validity,organic polyacid YJS- 1,steering agent GX- 2 and high efficiency corrosion inhibitor GH- X were prepared. Then multifunctional and environmental acid DHS-1 was prepared by mixing YJS-1,GX-2,GH-X,hydrochloric acid, hydrofluoric acid and water. The blockage removal performance,chelating performance,glue breaking property,corrosiveness, steering property of DHS-1 were investigated. Finally DHS-1 was applied on site in Tarim Basin,Xinjiang. The experiment results showed that DHS- 1,whose formula was 10% HCl,2% HF,10% YJS- 1,6% GX- 2,0.5% GH- X,could effectively dissolve the blockage without excessive dissolution and avoid destroying the rock skeleton,and had a good slow performance during reacting with clay mineral. It had excellent performances of strong dissolution,deep penetration,inhibition of secondary precipitation,low corrosion,no residue,effective steering and easy biodegradation. The field application results showed that compared with conventional acidification,the acidification process was simplified,the cost was reduced,the effect of increasing production and injection was obvious,and the average period of acidification was more than 200 days.
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徐太平,李 栓,周京伟,张书荣.多功能环保酸的制备与性能评价[J].油田化学,2021,38(2):247-252. XU Taiping, LI Shuan, ZHOU Jingwei, ZHANG Shurong. Preparation and Performance Evaluation of Multifunctional and Environmental Acid[J]. OILFIELD CHEMISTRY,2021,38(2):247-252.