Prediction of water influx effect on oil production in Biyad oil reservoir

Abstract EN

Petroleum reservoirs are often surrounded from the edge or the bottom by water aquifers that support the reservoir pressure through water influx.

In response to a pressure drop in petroleum reservoir, the water aquifer reacts to offset, or retard pressure decline by providing a source of water influx or encroachment.

This work was conducted to determine the water influx into Biyad oil reservoir by using a material balance equation (MBE) and Van Everdingen and Hurst unsteady state model and comparing between their results.

This work also predicts the reservoir future performance for the next two years.

The results confirmed that the reservoir had a water drive and the original oil in place was 247 MMSTB.

The water influx for the next two years was predicted by a material balance equation and unsteady state model and the results were in a good agreement with the average absolute error which is equal to (1.335%).