| 摘要 |
A method for gravel-packing an interval within a cased wellbore wherein perforations in the well casing are cleaned of any plugging material s before placement of the gravel (e.g., sand). A screen having alternate flowpaths thereon is lowered adjacent the perforated casing and a clear flui d (e.g., clear fracturing gel) is pumped through the perforations into the formation. The gel cleans the perforation of any plugging material and fractures t he formation. A gravel (e.g., sand) slurry is then pumped into the annulus and through the perforations to deposit sand in the fracture, the perforations, and the annulus around the screen. If a sand bridges) forms in the annulus, the alternate flowpaths will deliver the slurry to all levels within the annulus insuring good distribution of sand across the interval.
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