Reservoir Study for Production Optimization by Water Flooding in the Gullfaks field

The Gullfaks field constitutes one of the largest hydrocarbon deposits in Norway.It is divided into several geological formations: Cook, Statfjord, Lunde, and the Brent group.It consists of several reservoirs, two of which are the subject of this paper: Tarbert and Ness reservoirs.This paper aims to re-pressurize the reservoir of the Gullfaks field through the implementation of a secondary oil recovery method by flooding the reservoir with water.Many methods have been employed for the estimation of hydrocarbons and the enhancement of oil recovery (EOR).This study utilises the water flooding method to optimize oil recovery in the Gullfak field.Based on data from the Gullfaks field provided by company X for security reasons, a 3dimensional static model of the reservoir, created using Petrel, revealed a volume of 459 119 496,855 bbls of oil and 206 274 915 000 cf of gas.Subsequently, a 3-dimensional dynamic model was constructed through Eclipse simulation to predict a 20-year operation (2000-2020) of water injection into the reservoir over 20 years .The results indicated an oil recovery factor of 28.8%, representing a 19.7% increase over the primary recovery of 9.1%.Similarly, the gas recovery factor was determined to be 36.1%,representing a 24.6% increase over the primary recovery of 11.5%.This exponential increase in gas and oil production has led to economic growth, indicating that this method enhanced high-quality production in comparison to other oil recovery techniques.