Descaling

Scaling is a common challenge in oil and gas operations. Scale develops when minerals in produced water turn into solid deposits. This typically happens when water experiences changes in pressure or temperature, or when different water sources mix and the minerals react with each other.

If too much scale builds up, it can narrow or block pipes and equipment, reducing flow and causing production problems. That’s why proactive management of scale is important.

SANCCUS offer targeted chemical solutions to tackle scale build-up, protect assets and maintain efficient operations.

SANCCUS Solutions

There are two primary types of scale:

1. Calcium ion + Carbonate ion = Carbonate-type Scale
2. Calcium ion + Sulphate ion = Sulphate-type Scale

Correctly identifying the scale type is essential, as it determines the right chemical product and treatment method.

Carbonate-Type Scale

This type is readily treated with fast-acting acid-based products. Alternatively, alkaline-based chelating products can be used, which are particularly effective when the scale contains components that cannot be treated with acid, or when acid may damage other materials in the system.

Sulphate-Type Scale

This type is not soluble in acids and must be treated with alkaline-based chelating products. These bind low-solubility ions, allowing the scale to dissolve gradually over time. Optimal treatment temperatures are 50-90°C, though the process remains effective at lower temperatures with longer soaking.