METHODS AND APPARATUS TO SAMPLE HEAVY OIL FROM A SUBTERANEANFORMATION

摘要

A method of sampling fluid from a subterranean formation includes positio ning a first tool having a heater in a borehole so that the heater is adjace nt a portion of the subterranean formation; heating with the heater the port ion of the subterranean formation; moving the first tool from the borehole; positioning a second tool having a sampling probe in the borehole so that th e sampling probe is to contact a portion of the subterranean formation heate d by the heater; and obtaining via the sampling probe a fluid sample from th e portion of the subterranean formation heated by the heater.