Waterflood management of the Lunde formation in Gullfaks main field using streamline simulation.

摘要

Gullfaks field, offshore Norway, has been under operation since June 1978, when block 34/10 was awarded to Statoil, Norsk Hydro and Saga Petroleum. The initial recoverable reserve was estimated at 2.1 billion barrels of oil. The reservoir is heterogeneous with permeability ranging from milli to several Darcy. Currently, Gullfaks field is facing decline curve challenges in terms of production. However, with the recovery factor being as high as 56% Gullfaks is in the forefront of hydrocarbon production in offshore Europe.;In this study, streamline simulation is applied to Gullfaks main-field Waterflood management is observed by selecting an appropriate pattern for the injector and producer well using publicly available data of Lunde formation in the Gullfaks field.;Optimization of water-flood is a critical process for reservoir management. This is achieved through water injection. To optimize the water injection scenario an appropriate water injection pattern should be employed that focuses on the pockets of remaining oil in the area of interest. Streamline simulation provides a workflow for the optimization of waterflood identifying distribution of injected water to related producers, water loss to the aquifer and percentage of oil recovered as a result of contribution made by each water injector. The use of 3D streamline methodology is a complimentary tool to finite difference simulation and has received significant attention over the past several years.