Conoco Inc.

Paul E Pilkington

Mark P DiStefano

Marvin C Allen

Method and apparatus for downhole chromatography. A tool housing includes a chromatograph and a formation tester for extracting a fluid sample from a formation adjacent the wall of an uncased well bore. When such a sample is extracted it is directed into the chromatograph which analyzes the same and transmits the information to the surface. Thereafter, solvent from a reservoir in the housing is used to purge the chromatograph to enable the tool to be relocated to a different level for additional formation fluid analysis.

Method and apparatus for downhole chromatography

Hydrocarbons are produced from source rocks in fluid communication with geopressured sections by (a) producing fluids from the geopressured section to reduce pressure, (b) shutting in to allow migration from the source rock to the formerly geopressured section, and (c) producing the migrated hydrocarbons from the section.

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Houston, TX, United States of America

Paul E Pilkington