Which of the following is NOT one of the main periods in the life of a reservoir?

Which of the following is NOT one of the main periods in the life of a reservoir?

• A. Exploration
• B. Evaluation
• C. Production
• D. Abandonment

Answer: (B)

The main idea is that a reservoir’s life is divided into four broad stages: exploration to locate potential reservoirs, development to prepare and enable production, production to actually extract hydrocarbons, and abandonment to retire the field when it’s depleted. Evaluation isn’t listed as its own separate stage because it’s a process that occurs within the exploration/feasibility work to decide whether a discovery is worth moving forward. In other words, evaluation happens during the early analysis phases and helps determine if you should proceed, rather than being a standalone lifecycle phase itself. The other terms map directly to distinct lifecycle activities: exploration involves finding prospects, development covers turning a discovery into a producing facility, production is the extraction phase, and abandonment is the closing and decommissioning of the field.

The main idea is that a reservoir’s life is divided into four broad stages: exploration to locate potential reservoirs, development to prepare and enable production, production to actually extract hydrocarbons, and abandonment to retire the field when it’s depleted. Evaluation isn’t listed as its own separate stage because it’s a process that occurs within the exploration/feasibility work to decide whether a discovery is worth moving forward. In other words, evaluation happens during the early analysis phases and helps determine if you should proceed, rather than being a standalone lifecycle phase itself. The other terms map directly to distinct lifecycle activities: exploration involves finding prospects, development covers turning a discovery into a producing facility, production is the extraction phase, and abandonment is the closing and decommissioning of the field.