Downhole scale deposition in producing well bores is becoming a serious problem to most of oil companies, especially when dealing with deep wells. The problem will be greater for those companies that are using water flood to maintain the reservoir pressure as the scale is often Calcium, Barium, and Strontium Sulphates.
The options for the scale removal varies from chemical, mechanical removals and at the worst conditions full rig work over to replace the production tubing could be the only available option. The oil field scale treatment philosophy is "scale prevention is better than curing", accordingly, implementing inhibition programs is generally become the most efficient scale treatment technology. However this inhibition technology is based on many factors to enable an appropriate assessment and reliable conclusions:
How the inhibitor interact with the formation rock matrix.
Thermal stability of inhibitor.
Deployment and return profile.
In this paper, a sever downhole scale problem occurred at Ras Budran field that located at the eastern coast of Gulf of Suez in Red Sea territory, were presented and focused on:
The treatment parameters starting from the traditional chemical & mechanical removal techniques and finalizing by the squeeze inhibition programs.
Inhibition programs and its modification to overcome the formation problems.
Inhibitor deployment, fluid returns monitoring and optimization.
Inhibition lifetimes pronounced improvement for all the scaling wells.
Study different chemistry of scale inhibitors to improve adsorption/desorption profile.