Some oilfields in China operate under extreme conditions, where high temperatures and high salinity pose significant challenges to equipment maintenance and crude oil production. A Xinjiang oilfield had long been plagued by reservoir temperatures of 92°C and a salinity level of 8.5%, resulting in frequent scaling in the circulating water system. This not only caused persistently high gas injection pressure but also drastically reduced oil recovery efficiency, leading to annual economic losses exceeding ten million yuan due to equipment failures and production capacity losses.
After unsuccessful attempts with multiple conventional chemicals, the oilfield partnered with Kairui Chemical. Kairui's technical team conducted on-site investigations, including two weeks of water sampling analysis and operational condition surveys. They developed a customized solution featuring a blend of HEDP and OA-12 additives. Leveraging HEDP's exceptional chelating properties, this solution firmly binds calcium and magnesium ions in high-temperature, high-salinity environments, effectively preventing scale formation. Concurrently, the OA-12 additive enhances the chemical's stability and dispersibility, preventing scale adhesion to pipeline walls.
Upon implementation, the results were immediate: injection pressure decreased by 23%, oil recovery efficiency increased by 18%, and equipment cleaning cycles extended from 30 to 90 days, saving the oilfield over 3 million yuan annually in operational costs. The oilfield manager remarked, “Kairui Chemical's HEDP solution not only resolved our long-standing challenge but also demonstrated the immense potential of specialty chemical products under extreme operating conditions.”