APPARATUS AND METHODS TO PERFORM FOCUSED SAMPLING OF RESERVOIR FLUID

摘要

Apparatus and methods to perform focused sampling of reservoir fluid are described. An example method couples a sampling probe to a subterranean formation and, while the sampling probe is coupled to the subterranean formation, varies a pumping ratio of at least two displacement units to reduce a contamination level of a formation fluid extracted via the sampling probe from the subterranean formation.