Water treatment programs prevent fouling and corrosion during mill-out operations

Case studies, from various Permian basin operators, provided the basis for a methodology to assess mill-out operations, and make process improvements that yield economic benefits. DRILL-OUT OPERATIONS STUDY GeoKimika Oil & Gas conducted a study of drill-out operations for several Permian-based operators, that focused on the drill-out method-workover rig vs. coiled tubing-tank set-up, water quality, chemicals used and operational challenges. On-site water testing revealed that although freshwater was used at the start of the job, the return water samples had higher chlorides content and total dissolved solids (TDS). While not all operations are the same, steps to implement a drill-out, water treatment program should consider optimal disinfection, and compatibility of disinfection techniques, with other chemicals used, climate (high temperatures can create better environments for bacteria to flourish), and equipment limitations As the chemical advisor and owner of GeoKimika Oil & Gas, TANHEE GALINDO is responsible for business field operations, including on-site fluid testing and technical support to exploration and production companies and service providers.