Determining borehole corrected formation properties

摘要

A method for correcting formation properties due to effects of a borehole is disclosed. The method includes obtaining voltage measurements using a logging tool disposed in a borehole penetrating a subsurface formation. The method further includes using a processor to: determine a tensor for the formation using the voltage measurement. For a given set of parameters, the processor determines, based upon the voltage measurements, a parameter value for each parameter in a subset of the set of parameters. The method further uses the processor to compute a borehole-inclusive modeled tensor that includes the effects of the borehole using the parameter values, optimize the parameter values using the determined tensor and the borehole-inclusive tensor, compute an optimized tensor using the optimized parameter values, compute a borehole corrected tensor using the optimized tensor, and determine at least one borehole corrected formation property using at least one of the borehole corrected tensor or the optimized parameter values.

主权项

1. A method for correcting formation properties due to effects of a borehole comprising:
obtaining voltage measurements using a logging tool disposed in a borehole penetrating a subsurface formation; using a processor to: determine a tensor for the formation using the voltage measurements; for a given set of parameters, determine, based upon the voltage measurements, a parameter value for each parameter in a subset of the set of parameters; compute a borehole-inclusive modeled tensor that includes the effects of the borehole using the parameter values; optimize the parameter values using the determined tensor and the borehole-inclusive tensor; compute an optimized tensor using the optimized parameter values; compute a borehole corrected tensor using the optimized tensor; and determine at least one borehole corrected formation property using at least one of the borehole corrected tensor or the optimized parameter values.