Completions are divided into two specific parts, what are they?

• A. Upper completion and Reservoir (lower) completion
• B. Reservoir (lower) completion and Upper completion
• C. Surface completion and Subsurface completion
• D. Primary completion and Secondary completion

Answer: (B)

The concept being tested is how a well completion is organized into two main parts: an upper completion and a reservoir (lower) completion. The upper completion sits above the producing interval and includes the tubing, packers, valves, and surface-controlled equipment that manage and control flow from the surface down to the wellbore. The reservoir or lower completion is the portion that extends into the formation, containing the perforations, any sand-control equipment, and the hardware that actually connects the reservoir fluids into the production string. This separation allows independent maintenance and optimization of the surface/illuminate controls and the in-formation flow path.