i think you mean the acidization deosnt work in sandstone usaually they conduct it for carbonates as matrix where the storage in the sands. for sands it is difficult to conduct acidizing because it is not responding to the acid as in carbonates. there is some stories of success using some solution as HF and HCL but not necessarily working for you

maybe it is better to conduct hydraulic fracturing i had an experience with sandstone reservoir where there is no way to produce naturally where the reservori is tight in permeability and other problem is swelling clay so the best way is to complete oil based mud or some chemicals instead of oil because of the economics wise and frac the well
it is producing with more than 80 wells from hydraulic fractures

i recommend fracturing instead of acidizing but make sure whats the problem maybe the clay problem or the completion


good luck brother