Additional information that can aid in formation evaluation is actual samples of the reservoir fluids and pressures in the formation.
Pore pressure measurements for example can aid in determining permeability of the formation and viscosity of the fluids, identify fluid contact points, and are helpful in managing formation pressures and the drilling mud program.
By being able to capture samples from the formation, a number of fluid and formation properties can be monitored, including: resistivity/capacitance; viscosity; density; bubble point; compressibility; horizontal permeability; vertical permeability; and anisotropy.
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