CTL / VCF (high-level explanation)

Some calculations in SurveyTools require a temperature correction factor for petroleum products. You may see this referred to as CTL (or, more generally, a volume correction factor sometimes called VCF).

What it is used for (in this app)

• Adjusting volume between observed temperature and a reference temperature.
• Supporting dependent calculations such as floating roof displacement (FRC).
• Supporting some unit conversions (e.g. standard volume to barrels at a reference condition).

Best practice

• Use SurveyTools as a calculation aid within your existing workflow.
• Cross-check with your official tables or certified systems.
• If results look unexpected, verify your density basis (vacuum/air), temperature, and product group selection.