Netback results

After generation, the Preview branch of the Netback tree shows results of the Netback calculation. Each section of the Preview branch shows different information from the Netback calculation.

In order to calculate the Netback value of a crude, Assay simulates the distillation and processing of the crude being analysed. For the crude in question Assay calculates the yield and properties of each refinery stream. The different refinery streams are then blended to maximise the final product values according to the blending matrix and product specifications.

A particular refinery stream will be blended into the highest value product pool as long as the stream's properties do not violate the product constraints. As much of this stream will be used in the high value product as possible while ensuring constraints are met. If any constraints are exceeded then the stream will be blended in the next highest value stream, still ensuring the constraints are met for this next stream. This blending and optimisation of product properties occurs simultaneously for all the products in the refinery.

If during the initial distillation step any of the process unit capacities are exceeded, then the excess unprocessed feed is directed to a lower value stream where it is pooled to make a different product. For example, if the kerosene hydrotreater capacity is exceeded, then the excess kerosene (with high sulphur) is directed to another low value stream such as fuel oil. The kerosene which is hydrotreated will be pooled in the high value jet product (assuming it meets the other jet specifications) but this excess high sulphur kerosene will be blended in the low value fuel oil.

In situations where the capacity of units is exceeded, the unit is highlighted red in the process flow diagram.

Summary

The Summary shows a breakdown of the value of each crudes products and the costs associated with processing that crude to give the Netback value

For each crude included in the Netback case, the Summary page shows the calculated Netback value. The final margin is calculated by subtracting the crude cost and freight from the maximum potential value of the refined products.

You can sort the grid in descending order by choosing the required sort column from the Sort by: menu.