What was achieved
The FlairFlex service enabled the operator to identify a thick hydrocarbon zone using real-time analysis, which indicated that the zone contained a complex fluid distribution with intercalations of lighter and heavier hydrocarbons. Analysis from the FlairFlex service strongly indicated that this interval is a gas zone, whereas data from LWD was inconclusive.
The operator subsequently collected two downhole samples in a gas zone and one in a suspected oil zone. Analysis of the two shallower gas samples confirmed the fluid type. However, a fluid pumped from the suspected oil zone was identified as water, possibly Water-based mud (WBM) filtrate. Based on the FlairFlex service analysis suggesting the presence of liquid hydrocarbon, the operator decided to reset the wireline formation tester and begin pumping at a higher flow rate. This enabled oil to break through and the collection of high-quality samples. Later PVT analysis results matched the C1–C5 composition from the FlairFlex service.