Filter cake removal treatment fluid with chelating agent and viscoelastic surfactant

A reactive treatment fluid for filter cake removal, the reactive treatment fluid comprising:

• water that is from about 50 weight percent (wt. %) to about 70 wt. % of the reactive treatment fluid;
• diethylenetriamine pentaacetic acid (DTPA) that is from about 1 wt. % to about 15 wt. % of the reactive treatment fluid;
• a carbonate that is from 5 wt. % to 30 wt. % of the reactive treatment fluid;
• an oxidizing salt that is from about 1 wt. % to about 20 wt. % of the reactive treatment fluid;
• oxalic acid that is from about 1 wt. % to about 15 wt. % of the reactive treatment fluid;
• a viscoelastic surfactant (VES);
• and
• a base that is from about 0.2 wt. % to about 5 wt. % of the reactive treatment fluid.

A method of treating a wellbore for filter cake removal, the method comprising:

• injecting a reactive treatment fluid into a wellbore in a subterranean formation comprising a filter cake on a wall of the wellbore, the filter cake comprising a barite, the reactive treatment fluid comprising:
• a base fluid that is from about 50 weight percent (wt. %) to about 70 wt. % of the reactive treatment fluid,
• a chelating agent that is from about 1 wt. % to about 15 wt. % of the reactive treatment fluid,
• a carbonate that is from about 5 wt. % to about 30 wt. % of the reactive treatment fluid,
• an oxidizing salt that is from about 1 wt. % to about 20 wt. % of the reactive treatment fluid,
• an organic acid that is from about 1 wt. % to about 15 wt. % of the reactive treatment fluid,
• a viscoelastic surfactant (VES), and
• a base that is from about 0.2 wt. % to about 5 wt. % of the reactive treatment fluid;
• contacting the reactive treatment fluid with the filter cake in the wellbore, the reactive treatment fluid dissolving or exfoliating the barite from the wall into the reactive treatment fluid;
• and
• recovering the reactive treatment fluid comprising the barite removed from the wall.