This article, written by JPT Technology Editor Chris Carpenter, contains highlights of paper SPE 208806, “New Single-Step Acidizing Technique Treats Severe Fines Damage Over a Wide Range of Temperatures and Mineralogies,” by Lanne R. Houchin, SPE, Dorian Granizo, and Joseph Conine, SPE, PIC Chemicals. The paper has not been peer reviewed. The complete paper focuses on identifying a hydrofluoric-acid (HF) -derivative treatment that could be used as a single-step sandstone acid treatment not requiring acid-flowback services. Five commercially available buffered, retarded, and HF-derivative acid chemistries were tested to determine the risks of facility upsets. A new fluoroboric acid (HBF4) chemistry was developed that has all the benefits of HBF4, is compatible with most sensitive minerals, and does not cause facility upsets. Introduction The wells in this study predominantly target production intervals that were initially bypassed or beyond the reach of the original field development plan. Only HF-treatment compositions can remove the predominantly siliceous components found in sandstone reservoirs. The necessity of adjusting HF systems to accommodate sensitive mineralogies has been thoroughly documented. Recently, it is rare to use cores to identify potentially acid-sensitive mineralogy that may be present throughout the reservoir. Conventional HF treatments require a hydrochloric acid (HCl) preflush. However, when HCl combines with iron, the resultant ferric and ferrous chloride combine with even small amounts of asphaltenes in the crude to form tenacious rigid film emulsions and solvent-insoluble sludge. Five commercially available retarded or buffered HF systems were tested. The published work on these potential single-step chemistries showed the ability of these systems to be safe, capable of damage removal within the rock matrix, and compatible with various mineralogies to reduce the production of harmful precipitates. However, whether these improved chemistries would reduce the occurrence of surface-facility upsets had not been evaluated. Acid-flowback services typically cost between $75,000 and $250,000. This added cost would be prohibitive for over 70% of the near-end-of-life wells treated in this field study. Selecting a single-step acidizing chemical composition that eliminates the risk of formation of acid-reaction products that both plug the formation and cause potentially catastrophic facility upsets was the objective of this study.