Patent ID: 9664665
Date: 2017-05-30
CPC Classifications: E21B,G01N

Claim:
1. A method for analyzing a reservoir traversed by a wellbore, comprising: obtaining, from a first measurement station within the wellbore, a first at least one abundance ratio from a first gas chromatogram of a first fluid sample acquired at the first measurement station; obtaining, from a second measurement station within the wellbore, a second at least one abundance ratio from a second gas chromatogram of a second fluid sample acquired at the second measurement station; identifying a trend between the first at least one abundance ratio and the second at least one abundance ratio from the first plot; obtaining, from a third measurement station within the wellbore, a third at least one abundance ratio from a third gas chromatogram of a third fluid sample acquired at the third measurement station; determining, using the third at least one abundance ratio, whether a change exists in the abundance ratio trend; and using the determination to analyze the reservoir.