... lenticular zone, but it is somewhat continuous. When perforations were close together, ball sealers were not effective in getting the induced fracture to cover all the productive intervals. When perforated intervals were spaced 30 m apart, staging with perforation ball sealers was effective in getting...

... that multistage treatments with ball sealer diverters are highly effective if the perforated intervals are of low shot density and are widely spaced. Field results support the contention that it is possible to drain unperforated sands by wellbore communication through fractures. And, in fact, for this Eocene...