What is the term for perforating whereby holes are created in casing or liner to allow flow from the formation?

• A. Perforation
• B. Stimulation
• C. Milling
• D. Fracturing

Answer: (A)

Perforation is the process of creating holes through the casing and cement to establish a flow path between the formation and the wellbore. This is typically done with perforating guns that deploy shaped charges to pierce the casing and cement, forming channels into the rock so hydrocarbons can enter the well. It’s a completion step that directly connects the reservoir to production. Other terms describe different actions: stimulation covers methods to enhance production in a general sense, milling removes material, and fracturing creates rock fractures to improve permeability, not the actual holes in the casing.