Velocity String Revives Production of Deep Gas Wells With Halite Deposition
Chris Carpenter
Abstract
_ This article, written by JPT Technology Editor Chris Carpenter, contains highlights of paper SPE 213501, “Reviving Production From Over 100 Deep Gas Wells Suffering From Halite Deposition in Oman Through Velocity String,” by Ahmed Al Rashdi, Babak Ghaempanah, and Amira Al Hijri, PDO, et al. The paper has not been peer reviewed. _ The complete paper describes a scenario in which, following the reduction of system pressure through depletion compression, more than 150 deep gas wells began experiencing halite deposition. Many of the wells with this issue were also suffering from liquid loading. Velocity strings (VS) were installed as the primary means of gas‑well deliquefication. Many of these wells with VS showed no further halite deposition. Consequently, frequent freshwater bullheading (FWB) or cleanout with coiled tubing (CT) were no longer needed. This observation triggered the idea of creating synergy between gas‑well deliquefication and halite management through installation of VS.