Efficient and Sustainable Scale Removal: Unveiling the Power of Pressure Pulsing in Restoring Wellbore Accessibility

This study aims to investigate the safe and environmentally friendly application of pressure pulsing technique for effectively removing calcium sulphate scale (CSS) blockages in wellbores. The objective is to assess the ability of the pulsing tool to restore full wellbore accessibility while minimizing the carbon footprint. The pressure pulsing tool utilized a combination of slickwater and gel to create a controlled water hammering effect, which facilitates the disruption of sand bridges, loosens particles, and clears blockages. Implemented with a four-port configuration, the tool expels fluids downward and outward, effectively eroding the CSS blockage through cavitation erosion. This process ensures a clean and accessible wellbore while promoting safety and reducing the carbon footprint. The pressure pulsing technique successfully eliminated 41 feet of wellbore blockage, corresponding to the removal of 140 kg of accumulated CSS. This mechanical action, driven by cavitational erosion, proved crucial in the cleaning process. Further analysis revealed that the pulsing tool's optimized operational parameters led to increased penetration rates and improved removal efficiency. By employing the pressure pulsing technique, the study provides a safe, effective, and environmentally conscious solution for addressing CSS blockages, thereby enhancing well productivity and reducing the carbon footprint. This study presents a pioneering approach using pressure pulsing technique to safely remove and clean CSS blockages in wellbores. By prioritizing safety and environmental consciousness, the application of this technique contributes to the reduction of potential hazards and the overall carbon footprint in the oil and gas industry. The findings provide valuable insights into improving operational practices and demonstrating the effectiveness of pressure pulsing as an eco-friendly solution for maintaining wellbore accessibility.