ASP design for the Minnelusa formation under low-salinity conditions: Impacts of anhydrite on ASP performance

► We designed ASP blends based only on fluid-fluid interactions and phase behavior. ► We compared recovery from model rock (less reactive) with rock containing anhydrite. ► Geochemical observations and modeling show why anhydrite affects water chemistry. ► Our results explain why NaOH should be used in contrast with Na2CO3 in Minnelusa rock.