Which two parts make up the completion system?

Which two parts make up the completion system?

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

Answer: (B)

The completion system is built as two functional parts: the lower reservoir completion and the upper completion. The lower reservoir completion sits in the productive zone and provides the actual path for fluids to enter the well, using perforations, possible gravel packing, sleeves, and any zone-specific hardware. The upper completion sits above the formation and includes the production tubing, packers, and surface or near-surface equipment (like the wellhead and tree) that control and regulate the flow. This separation lets you optimize how the reservoir communicates with the well while separately managing surface control and safety. Other pairings mix stages or locations rather than describing the two-part functional split of access and control, so they don’t capture the standard way engineers conceptualize a completion system.

The completion system is built as two functional parts: the lower reservoir completion and the upper completion. The lower reservoir completion sits in the productive zone and provides the actual path for fluids to enter the well, using perforations, possible gravel packing, sleeves, and any zone-specific hardware. The upper completion sits above the formation and includes the production tubing, packers, and surface or near-surface equipment (like the wellhead and tree) that control and regulate the flow. This separation lets you optimize how the reservoir communicates with the well while separately managing surface control and safety.

Other pairings mix stages or locations rather than describing the two-part functional split of access and control, so they don’t capture the standard way engineers conceptualize a completion system.