As reservoirs deplete and water production increases, fines production causes near-wellbore damage and gravel pack screen plugging. To alleviate screen plugging, acid washes are pumped onto the screens. A more permanent solution to fines plugging is acidization of the surrounding formation and removal of the source of the fines. A series of tests on day-rich cores shows that a new organic acid (NOA) in conjunction with hydrofluoric acid (HF) can remove fines successfully and stimulate production.