New gravel-pack technique reduces sand production in Niger Delta wells

07/02/2001
In the Niger Delta, off Nigeria, field experience based on a learning curve derived from gravel packing in conventional wells proved effective for improving gravel packs in monobore and horizontal wells. Operators also reduced the need for remedial sand-control repairs by extensively applying coiled tubing in gravel packing procedures.Well production histories comparing old prepacked slotted-liner methods with the new procedures show a reduction in sand cut to 9 lb/1,000 bbl (ptb) of crude oil from a previous 20 ptb.Sand controlGravel packing is the most accepted technology for sand control of unconsolidated reservoirs, but it is a challenge in horizontal wells, which have increase produc...
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