What was achieved
Using the FlairFlex service, the operator detected a thick column of relatively light fluid overlaying a layer of sandstone containing the presence of fluid components in the C6—C8 range. The appearance of the heavier fraction (n-C6–n-C8 and methylcyclohexane [MCC6]) suggested the presence of liquid hydrocarbons. Fluid markers such as wetness and light/heavy ratio confirmed the presence of gas on top of a light oil. Nearly no hydrocarbon was recorded below the oil zone, and Schlumberger experts interpreted this section as water bearing. Comparison with offset PVT analysis further confirmed the presence of gas and oil.
Based on the results from the FlairFlex service and the petrophysical logs, the operator reviewed its wireline sampling program and added a downhole sampling station in the potential thin oil zone. The collected sample confirmed the fluid type described by the FlairFlex service. Later, a full PVT analysis also confirmed the C1—C5 compositional analysis from the FlairFlex service.