Oil samples obtained by carefully controlling production rate and sampling separator gas and separator liquid are called?

• A. Separator Samples
• B. Surface Samples
• C. Bottom-Hole Samples
• D. Core Samples

Answer: (A)

Separator samples are collected at the surface after the produced fluids have been separated into gas and liquids. Controlling the production rate during sampling and taking the oil from the separator liquid ensures the sample reflects the oil phase without gas entrainment or flashing that could alter composition. This yields a representative oil sample for analysis, distinct from downhole bottom-hole samples, rock core samples, or raw surface samples taken before separation.