A few US shale oil producers are using DNA sequencing to identify promising wells, Reuters reports. It adds that it's part of companies' efforts to cut costs and keep pace with global oil producers.

The companies are testing DNA extracted from microorganisms found in rock samples to compare to DNA found in oil samples. Similarities and differences in their genetic profiles are then used to find locations that are more likely to have oil.

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Genetics of Oil Drilling - GenomeWeb