Formation evaluation system and method

A method for evaluating a fluid from a subterranean formation comprising:

• positioning a downhole tool in the wellbore, the downhole tool having a probe comprising a contamination intake and a sampling intake, wherein a portion of the fluid flows into the sampling intake at a first flow rate and a portion of the fluid flows into the contamination intake external to the sampling intake at a second flow rate;
• monitoring a contamination level of the fluid from the sampling intake, or the contamination intake, or both;
• and
• adjusting a ratio of the first flow rate to the second flow rate based on the contamination level.

A downhole tool positionable in a wellbore for evaluating a fluid from the subterranean formation, comprising:

• a fluid communication device for collecting downhole fluids and comprising a probe for sealingly engaging a wall of the wellbore, the
• probe having a sampling intake for drawing a first portion of the downhole fluids into the downhole tool at a first flow rate and a contamination intake for drawing a second portion of the downhole fluids into the downhole tool at a second flow rate;
• at least one sensor for detecting a contamination level of the first portion, or the second portion, or both;
• and
• a controller for selectively adjusting a ratio of the first flow rate to the second flow rate based on the contamination level.