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Well tests during shale boom come under a cloud

One-day performance assessments don't provide enough data to predict future potential, says study; also, few rules or standards govern the tests, note observers

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A few producers have stopped touting 24-hour tests, saying that the results are poorly understood and figure too prominently in trading and speculation about company prospects, leading to overly sharp changes in share prices.

Houston

TESTS done on new wells that boosted the fortunes of oil developers by billions of dollars during the US shale boom are increasingly coming under scrutiny.

The one-day performance tests, which regularly spike company shares on their results, don't provide enough data to

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