David D. Cramer BJ Services Co. Denver In the Bakken formation, stimulation treatments are used sparingly in horizontal well completions. But in vertical wells, stimulation is used extensively and successfully. This concluding part of a two-part series, started in the Apr. 22 issue, shows the stimulation designs that are effective in the Bakken formation. HYDRAULIC FRACTURE HEIGHT Post-treatment temperature and radioactive tracer surveys allow estimates to be made of the extent of hydraulic fracture height growth in the Bakken formation. Fig. 1a shows a temperature survey which was run following a crosslinked gell...

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