The Defining Series: Formation Damage

The article examines the productivity decline observed in gas wells, typically attributed to the phenomenon of reservoir fines. These fine particles can obstruct the pores in the reservoir, leading to decreased permeability. The focus is on a significant gas field in the North-western margin of the Nile Delta, which has suffered considerable productivity losses due to this problem.

Various methodologies, including well testing and performance analysis, laboratory core flood tests, and Scanning Electron Microscopy (SEM), were employed to identify and assess the extent of formation damage. The research also investigated the potential of acid treatment to rectify damage to the cores. Furthermore, the application and effectiveness of matrix acid stimulation were evaluated using a specific case study from the investigated field.