An aggressive hydraulic fracturing campaign, involving over 360 wells, has been conducted at Prudhoe Bay, primarily within the waterflood region of the field. High declines in gross fluid production rates (oil plus water) were observed in the first few months after the fracture stimulations were performed. Work was initiated to determine the cause of these declines and to identify any actions which would mitigate them.

A combination of diagnostic well work, field data analysis and reservoir studies to investigate the decline mechanisms are presented. The paper highlights the use of numerical simulation for investigating the reservoir mechanisms of decline, and the benefits associated with alternative waterflood management schemes.

You can access this article if you purchase or spend a download.